bamort/backend/gsmaster/export_import.go

package gsmaster

import (
	"bamort/database"
	"bamort/models"
	"encoding/json"
	"fmt"
	"os"
	"path/filepath"

	"gorm.io/gorm"
)

// ExportableCategoryDifficulty represents a category/difficulty combination for a skill
type ExportableCategoryDifficulty struct {
	Category   string `json:"category"`
	Difficulty string `json:"difficulty"`
	LearnCost  int    `json:"learn_cost"`
}

// ExportableSkill represents a skill without database IDs for export
type ExportableSkill struct {
	Name                   string                         `json:"name"`
	GameSystem             string                         `json:"game_system"`
	GameSystemId           uint                           `json:"game_system_id"`
	Beschreibung           string                         `json:"beschreibung"`
	SourceCode             string                         `json:"source_code"` // Instead of SourceID
	PageNumber             int                            `json:"page_number"`
	Initialwert            int                            `json:"initialwert"`
	BasisWert              int                            `json:"basiswert"`
	Bonuseigenschaft       string                         `json:"bonuseigenschaft"`
	Improvable             bool                           `json:"improvable"`
	InnateSkill            bool                           `json:"innate_skill"`
	Category               string                         `json:"category"`                // Deprecated: use CategoriesDifficulties
	Difficulty             string                         `json:"difficulty"`              // Deprecated: use CategoriesDifficulties
	CategoriesDifficulties []ExportableCategoryDifficulty `json:"categories_difficulties"` // All category/difficulty combinations
}

// ExportableSource represents a source for export
type ExportableSource struct {
	Code        string `json:"code"`
	Name        string `json:"name"`
	FullName    string `json:"full_name"`
	Edition     string `json:"edition"`
	Publisher   string `json:"publisher"`
	PublishYear int    `json:"publish_year"`
	Description string `json:"description"`
	IsCore      bool   `json:"is_core"`
	IsActive    bool   `json:"is_active"`
	GameSystem  string `json:"game_system"`
}

// ExportableSkillCategory represents a skill category for export
type ExportableSkillCategory struct {
	Name       string `json:"name"`
	GameSystem string `json:"game_system"`
	SourceCode string `json:"source_code"`
}

// ExportableSkillDifficulty represents a skill difficulty for export
type ExportableSkillDifficulty struct {
	Name       string `json:"name"`
	GameSystem string `json:"game_system"`
}

// ExportableSkillCategoryDifficulty represents the relationship for export
type ExportableSkillCategoryDifficulty struct {
	SkillName        string `json:"skill_name"`
	SkillSystem      string `json:"skill_system"`
	CategoryName     string `json:"category_name"`
	CategorySystem   string `json:"category_system"`
	DifficultyName   string `json:"difficulty_name"`
	DifficultySystem string `json:"difficulty_system"`
	LearnCost        int    `json:"learn_cost"`
}

// ExportableWeaponSkillCategoryDifficulty represents the weapon skill relationship for export
type ExportableWeaponSkillCategoryDifficulty struct {
	WeaponSkillName  string `json:"weapon_skill_name"`
	SkillSystem      string `json:"skill_system"`
	CategoryName     string `json:"category_name"`
	CategorySystem   string `json:"category_system"`
	DifficultyName   string `json:"difficulty_name"`
	DifficultySystem string `json:"difficulty_system"`
	LearnCost        int    `json:"learn_cost"`
}

// ExportableSpell represents a spell for export
type ExportableSpell struct {
	Name             string `json:"name"`
	GameSystem       string `json:"game_system"`
	GameSystemId     uint   `json:"game_system_id"`
	Beschreibung     string `json:"beschreibung"`
	SourceCode       string `json:"source_code"`
	PageNumber       int    `json:"page_number"`
	Bonus            int    `json:"bonus"`
	Stufe            int    `json:"level"`
	AP               string `json:"ap"`
	Art              string `json:"art"`
	Zauberdauer      string `json:"zauberdauer"`
	Reichweite       string `json:"reichweite"`
	Wirkungsziel     string `json:"wirkungsziel"`
	Wirkungsbereich  string `json:"wirkungsbereich"`
	Wirkungsdauer    string `json:"wirkungsdauer"`
	Ursprung         string `json:"ursprung"`
	Category         string `json:"category"`
	LearningCategory string `json:"learning_category"`
}

// ExportableCharacterClass represents a character class for export
type ExportableCharacterClass struct {
	Code        string `json:"code"`
	Name        string `json:"name"`
	Description string `json:"description"`
	SourceCode  string `json:"source_code"`
	GameSystem  string `json:"game_system"`
}

// ExportableSpellSchool represents a spell school for export
type ExportableSpellSchool struct {
	Name        string `json:"name"`
	Description string `json:"description"`
	SourceCode  string `json:"source_code"`
	GameSystem  string `json:"game_system"`
}

// ExportableClassCategoryEPCost represents class-category EP costs for export
type ExportableClassCategoryEPCost struct {
	CharacterClassCode string `json:"character_class_code"`
	SkillCategoryName  string `json:"skill_category_name"`
	EPPerTE            int    `json:"ep_per_te"`
}

// ExportableClassSpellSchoolEPCost represents class-spell school EP costs for export
type ExportableClassSpellSchoolEPCost struct {
	CharacterClassCode string `json:"character_class_code"`
	SpellSchoolName    string `json:"spell_school_name"`
	EPPerLE            int    `json:"ep_per_le"`
}

// ExportableSpellLevelLECost represents spell level LE costs for export
type ExportableSpellLevelLECost struct {
	Level        int    `json:"level"`
	LERequired   int    `json:"le_required"`
	GameSystem   string `json:"game_system"`
	GameSystemId uint   `json:"game_system_id"`
}

// ExportableSkillImprovementCost represents skill improvement costs for export
type ExportableSkillImprovementCost struct {
	SkillName        string `json:"skill_name"`
	SkillSystem      string `json:"skill_system"`
	CategoryName     string `json:"category_name"`
	CategorySystem   string `json:"category_system"`
	DifficultyName   string `json:"difficulty_name"`
	DifficultySystem string `json:"difficulty_system"`
	CurrentLevel     int    `json:"current_level"`
	TERequired       int    `json:"te_required"`
}

// ExportableWeaponSkill represents a weapon skill for export
type ExportableWeaponSkill struct {
	Name                   string                         `json:"name"`
	GameSystem             string                         `json:"game_system"`
	GameSystemId           uint                           `json:"game_system_id"`
	Beschreibung           string                         `json:"beschreibung"`
	SourceCode             string                         `json:"source_code"`
	PageNumber             int                            `json:"page_number"`
	Initialwert            int                            `json:"initialwert"`
	BasisWert              int                            `json:"basiswert"`
	Bonuseigenschaft       string                         `json:"bonuseigenschaft"`
	Improvable             bool                           `json:"improvable"`
	InnateSkill            bool                           `json:"innate_skill"`
	Category               string                         `json:"category"`                // Deprecated: use CategoriesDifficulties
	Difficulty             string                         `json:"difficulty"`              // Deprecated: use CategoriesDifficulties
	CategoriesDifficulties []ExportableCategoryDifficulty `json:"categories_difficulties"` // All category/difficulty combinations
}

// ExportableEquipment represents equipment for export
type ExportableEquipment struct {
	Name         string  `json:"name"`
	GameSystem   string  `json:"game_system"`
	Beschreibung string  `json:"beschreibung"`
	SourceCode   string  `json:"source_code"`
	PageNumber   int     `json:"page_number"`
	Gewicht      float64 `json:"gewicht"`
	Wert         float64 `json:"wert"`
	PersonalItem bool    `json:"personal_item"`
}

// ExportableWeapon represents a weapon for export
type ExportableWeapon struct {
	Name          string  `json:"name"`
	GameSystem    string  `json:"game_system"`
	Beschreibung  string  `json:"beschreibung"`
	SourceCode    string  `json:"source_code"`
	PageNumber    int     `json:"page_number"`
	Gewicht       float64 `json:"gewicht"`
	Wert          float64 `json:"wert"`
	PersonalItem  bool    `json:"personal_item"`
	SkillRequired string  `json:"skill_required"`
	Damage        string  `json:"damage"`
	RangeNear     int     `json:"range_near"`
	RangeMiddle   int     `json:"range_middle"`
	RangeFar      int     `json:"range_far"`
}

// ExportableContainer represents a container for export
type ExportableContainer struct {
	Name         string  `json:"name"`
	GameSystem   string  `json:"game_system"`
	Beschreibung string  `json:"beschreibung"`
	SourceCode   string  `json:"source_code"`
	PageNumber   int     `json:"page_number"`
	Gewicht      float64 `json:"gewicht"`
	Wert         float64 `json:"wert"`
	PersonalItem bool    `json:"personal_item"`
	Tragkraft    float64 `json:"tragkraft"`
	Volumen      float64 `json:"volumen"`
}

// ExportableTransportation represents transportation for export
type ExportableTransportation struct {
	Name         string  `json:"name"`
	GameSystem   string  `json:"game_system"`
	Beschreibung string  `json:"beschreibung"`
	SourceCode   string  `json:"source_code"`
	PageNumber   int     `json:"page_number"`
	Gewicht      float64 `json:"gewicht"`
	Wert         float64 `json:"wert"`
	PersonalItem bool    `json:"personal_item"`
	Tragkraft    float64 `json:"tragkraft"`
	Volumen      float64 `json:"volumen"`
}

// ExportableBelieve represents a belief system for export
type ExportableBelieve struct {
	Name         string `json:"name"`
	GameSystem   string `json:"game_system"`
	Beschreibung string `json:"beschreibung"`
	SourceCode   string `json:"source_code"`
	PageNumber   int    `json:"page_number"`
}

// ExportableClassCategoryLearningPoints represents learning points allocation for export
type ExportableClassCategoryLearningPoints struct {
	ClassName      string `json:"class_name"`
	ClassSystem    string `json:"class_system"`
	CategoryName   string `json:"category_name"`
	CategorySystem string `json:"category_system"`
	Points         int    `json:"points"`
}

// ExportableClassSpellPoints represents spell points for export
type ExportableClassSpellPoints struct {
	ClassName   string `json:"class_name"`
	ClassSystem string `json:"class_system"`
	SpellPoints int    `json:"spell_points"`
}

// ExportableClassTypicalSkill represents typical skills for export
type ExportableClassTypicalSkill struct {
	ClassName   string `json:"class_name"`
	ClassSystem string `json:"class_system"`
	SkillName   string `json:"skill_name"`
	SkillSystem string `json:"skill_system"`
	Bonus       int    `json:"bonus"`
	Attribute   string `json:"attribute,omitempty"`
	Notes       string `json:"notes,omitempty"`
}

// ExportableClassTypicalSpell represents typical spells for export
type ExportableClassTypicalSpell struct {
	ClassName   string `json:"class_name"`
	ClassSystem string `json:"class_system"`
	SpellName   string `json:"spell_name"`
	SpellSystem string `json:"spell_system"`
	Notes       string `json:"notes,omitempty"`
}

// ExportableMiscLookup represents miscellaneous lookup values for export
type ExportableMiscLookup struct {
	Key          string `json:"key"`
	Value        string `json:"value"`
	SourceCode   string `json:"source_code"`
	PageNumber   int    `json:"page_number"`
	GameSystemId uint   `json:"game_system_id"`
}

// ExportSkills exports all skills to a JSON file
func ExportSkills(outputDir string) error {
	var skills []models.Skill
	if err := database.DB.Find(&skills).Error; err != nil {
		return fmt.Errorf("failed to fetch skills: %w", err)
	}

	sourceMap := buildSourceMap()

	// Get all skill category difficulties
	var scds []models.SkillCategoryDifficulty
	database.DB.Preload("SkillCategory").Preload("SkillDifficulty").Find(&scds)

	// Build map of skill_id -> []category/difficulty combinations
	scdMap := make(map[uint][]ExportableCategoryDifficulty)
	for _, scd := range scds {
		scdMap[scd.SkillID] = append(scdMap[scd.SkillID], ExportableCategoryDifficulty{
			Category:   scd.SkillCategory.Name,
			Difficulty: scd.SkillDifficulty.Name,
			LearnCost:  scd.LearnCost,
		})
	}

	// Convert to exportable format
	exportable := make([]ExportableSkill, len(skills))
	for i, skill := range skills {
		exportable[i] = ExportableSkill{
			Name:                   skill.Name,
			GameSystem:             skill.GameSystem,
			GameSystemId:           skill.GameSystemId,
			Beschreibung:           skill.Beschreibung,
			SourceCode:             sourceMap[skill.SourceID],
			PageNumber:             skill.PageNumber,
			Initialwert:            skill.Initialwert,
			BasisWert:              skill.BasisWert,
			Bonuseigenschaft:       skill.Bonuseigenschaft,
			Improvable:             skill.Improvable,
			InnateSkill:            skill.InnateSkill,
			Category:               skill.Category,
			Difficulty:             skill.Difficulty,
			CategoriesDifficulties: scdMap[skill.ID],
		}
	}

	return writeJSON(filepath.Join(outputDir, "skills.json"), exportable)
}

// ImportSkills imports skills from a JSON file
func ImportSkills(inputDir string) error {
	var exportable []ExportableSkill
	if err := readJSON(filepath.Join(inputDir, "skills.json"), &exportable); err != nil {
		return err
	}

	if err := database.DB.AutoMigrate(&models.Skill{}); err != nil {
		return fmt.Errorf("failed to migrate skills table: %w", err)
	}

	sourceMap := buildSourceMapReverse()
	categoryMap := buildCategoryMap()
	difficultyMap := buildDifficultyMap()

	for _, exp := range exportable {
		var skill models.Skill
		gs := models.GetGameSystem(exp.GameSystemId, exp.GameSystem)
		effectiveName := exp.GameSystem
		if effectiveName == "" {
			effectiveName = gs.Name
		}
		effectiveID := gs.ID
		if effectiveID == 0 {
			effectiveID = models.GetGameSystem(0, "").ID
		}

		result := database.DB.Where("name = ? AND (game_system = ? OR game_system_id = ?)", exp.Name, effectiveName, effectiveID).First(&skill)

		sourceID := sourceMap[exp.SourceCode]

		if result.Error == gorm.ErrRecordNotFound {
			// Create new skill
			skill = models.Skill{
				Name:             exp.Name,
				GameSystem:       effectiveName,
				GameSystemId:     effectiveID,
				Beschreibung:     exp.Beschreibung,
				SourceID:         sourceID,
				PageNumber:       exp.PageNumber,
				Initialwert:      exp.Initialwert,
				BasisWert:        exp.BasisWert,
				Bonuseigenschaft: exp.Bonuseigenschaft,
				Improvable:       exp.Improvable,
				InnateSkill:      exp.InnateSkill,
				Category:         exp.Category,
				Difficulty:       exp.Difficulty,
			}
			if err := database.DB.Create(&skill).Error; err != nil {
				return fmt.Errorf("failed to create skill %s: %w", exp.Name, err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query skill %s: %w", exp.Name, result.Error)
		} else {
			// Update existing skill
			skill.Beschreibung = exp.Beschreibung
			skill.SourceID = sourceID
			skill.PageNumber = exp.PageNumber
			skill.Initialwert = exp.Initialwert
			skill.BasisWert = exp.BasisWert
			skill.Bonuseigenschaft = exp.Bonuseigenschaft
			skill.Improvable = exp.Improvable
			skill.InnateSkill = exp.InnateSkill
			skill.Category = exp.Category
			skill.Difficulty = exp.Difficulty
			skill.GameSystemId = effectiveID
			skill.GameSystem = effectiveName

			if err := database.DB.Save(&skill).Error; err != nil {
				return fmt.Errorf("failed to update skill %s: %w", exp.Name, err)
			}
		}

		// Import category/difficulty combinations if present
		if len(exp.CategoriesDifficulties) > 0 {
			// Delete existing relationships for this skill
			database.DB.Where("skill_id = ?", skill.ID).Delete(&models.SkillCategoryDifficulty{})

			// Create new relationships
			for _, cd := range exp.CategoriesDifficulties {
				categoryID := categoryMap[effectiveName][cd.Category]
				difficultyID := difficultyMap[effectiveName][cd.Difficulty]

				if categoryID == 0 || difficultyID == 0 {
					continue // Skip if category or difficulty not found
				}

				scd := models.SkillCategoryDifficulty{
					SkillID:           skill.ID,
					SkillCategoryID:   categoryID,
					SkillDifficultyID: difficultyID,
					LearnCost:         cd.LearnCost,
					SCategory:         cd.Category,
					SDifficulty:       cd.Difficulty,
				}
				if err := database.DB.Create(&scd).Error; err != nil {
					return fmt.Errorf("failed to create skill category difficulty for %s: %w", exp.Name, err)
				}
			}
		}
	}

	return nil
}

// ExportSources exports all sources to a JSON file
func ExportSources(outputDir string) error {
	var sources []models.Source
	if err := database.DB.Find(&sources).Error; err != nil {
		return fmt.Errorf("failed to fetch sources: %w", err)
	}

	exportable := make([]ExportableSource, len(sources))
	for i, s := range sources {
		exportable[i] = ExportableSource{
			Code:        s.Code,
			Name:        s.Name,
			FullName:    s.FullName,
			Edition:     s.Edition,
			Publisher:   s.Publisher,
			PublishYear: s.PublishYear,
			Description: s.Description,
			IsCore:      s.IsCore,
			IsActive:    s.IsActive,
			GameSystem:  s.GameSystem,
		}
	}

	return writeJSON(filepath.Join(outputDir, "sources.json"), exportable)
}

// ImportSources imports sources from a JSON file
func ImportSources(inputDir string) error {
	var exportable []ExportableSource
	if err := readJSON(filepath.Join(inputDir, "sources.json"), &exportable); err != nil {
		return err
	}

	for _, exp := range exportable {
		source := models.Source{
			Code:        exp.Code,
			Name:        exp.Name,
			FullName:    exp.FullName,
			Edition:     exp.Edition,
			Publisher:   exp.Publisher,
			PublishYear: exp.PublishYear,
			Description: exp.Description,
			IsCore:      exp.IsCore,
			IsActive:    exp.IsActive,
			GameSystem:  exp.GameSystem,
		}

		if err := findOrCreateByCode(exp.Code, &source, "source"); err != nil {
			return err
		}
	}

	return nil
}

// ExportSkillCategoryDifficulties exports skill-category-difficulty relationships
func ExportSkillCategoryDifficulties(outputDir string) error {
	var scds []models.SkillCategoryDifficulty
	if err := database.DB.Find(&scds).Error; err != nil {
		return fmt.Errorf("failed to fetch skill category difficulties: %w", err)
	}

	exportable := make([]ExportableSkillCategoryDifficulty, len(scds))
	for i, scd := range scds {
		var skill models.Skill
		var category models.SkillCategory
		var difficulty models.SkillDifficulty

		database.DB.First(&skill, scd.SkillID)
		database.DB.First(&category, scd.SkillCategoryID)
		database.DB.First(&difficulty, scd.SkillDifficultyID)

		exportable[i] = ExportableSkillCategoryDifficulty{
			SkillName:        skill.Name,
			SkillSystem:      skill.GameSystem,
			CategoryName:     category.Name,
			CategorySystem:   category.GameSystem,
			DifficultyName:   difficulty.Name,
			DifficultySystem: difficulty.GameSystem,
			LearnCost:        scd.LearnCost,
		}
	}

	return writeJSON(filepath.Join(outputDir, "skill_category_difficulties.json"), exportable)
}

// ImportSkillCategoryDifficulties imports skill-category-difficulty relationships
func ImportSkillCategoryDifficulties(inputDir string) error {
	var exportable []ExportableSkillCategoryDifficulty
	if err := readJSON(filepath.Join(inputDir, "skill_category_difficulties.json"), &exportable); err != nil {
		return err
	}

	for _, exp := range exportable {
		// Find the skill
		var skill models.Skill
		if err := database.DB.Where("name = ? AND game_system = ?", exp.SkillName, exp.SkillSystem).First(&skill).Error; err != nil {
			return fmt.Errorf("skill not found: %s/%s", exp.SkillName, exp.SkillSystem)
		}

		// Find the category
		var category models.SkillCategory
		if err := database.DB.Where("name = ? AND game_system = ?", exp.CategoryName, exp.CategorySystem).First(&category).Error; err != nil {
			return fmt.Errorf("category not found: %s/%s", exp.CategoryName, exp.CategorySystem)
		}

		// Find the difficulty
		var difficulty models.SkillDifficulty
		if err := database.DB.Where("name = ? AND game_system = ?", exp.DifficultyName, exp.DifficultySystem).First(&difficulty).Error; err != nil {
			return fmt.Errorf("difficulty not found: %s/%s", exp.DifficultyName, exp.DifficultySystem)
		}

		// Check if relationship exists
		var scd models.SkillCategoryDifficulty
		result := database.DB.Where("skill_id = ? AND skill_category_id = ? AND skill_difficulty_id = ?",
			skill.ID, category.ID, difficulty.ID).First(&scd)

		if result.Error == gorm.ErrRecordNotFound {
			// Create new relationship
			scd = models.SkillCategoryDifficulty{
				SkillID:           skill.ID,
				SkillCategoryID:   category.ID,
				SkillDifficultyID: difficulty.ID,
				LearnCost:         exp.LearnCost,
				SCategory:         category.Name,
				SDifficulty:       difficulty.Name,
			}
			if err := database.DB.Create(&scd).Error; err != nil {
				return fmt.Errorf("failed to create relationship: %w", err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query relationship: %w", result.Error)
		} else {
			// Update existing relationship
			scd.LearnCost = exp.LearnCost
			scd.SCategory = category.Name
			scd.SDifficulty = difficulty.Name

			if err := database.DB.Save(&scd).Error; err != nil {
				return fmt.Errorf("failed to update relationship: %w", err)
			}
		}
	}

	return nil
}

// ExportWeaponSkillCategoryDifficulties exports weapon skill-category-difficulty relationships
func ExportWeaponSkillCategoryDifficulties(outputDir string) error {
	var wscds []models.WeaponSkillCategoryDifficulty
	if err := database.DB.Find(&wscds).Error; err != nil {
		return fmt.Errorf("failed to fetch weapon skill category difficulties: %w", err)
	}

	exportable := make([]ExportableWeaponSkillCategoryDifficulty, len(wscds))
	for i, wscd := range wscds {
		var weaponSkill models.WeaponSkill
		var category models.SkillCategory
		var difficulty models.SkillDifficulty

		database.DB.First(&weaponSkill, wscd.WeaponSkillID)
		database.DB.First(&category, wscd.SkillCategoryID)
		database.DB.First(&difficulty, wscd.SkillDifficultyID)

		exportable[i] = ExportableWeaponSkillCategoryDifficulty{
			WeaponSkillName:  weaponSkill.Name,
			SkillSystem:      weaponSkill.GameSystem,
			CategoryName:     category.Name,
			CategorySystem:   category.GameSystem,
			DifficultyName:   difficulty.Name,
			DifficultySystem: difficulty.GameSystem,
			LearnCost:        wscd.LearnCost,
		}
	}

	return writeJSON(filepath.Join(outputDir, "weaponskill_category_difficulties.json"), exportable)
}

// ImportWeaponSkillCategoryDifficulties imports weapon skill-category-difficulty relationships
func ImportWeaponSkillCategoryDifficulties(inputDir string) error {
	var exportable []ExportableWeaponSkillCategoryDifficulty
	if err := readJSON(filepath.Join(inputDir, "weaponskill_category_difficulties.json"), &exportable); err != nil {
		return err
	}

	for _, exp := range exportable {
		// Find the weapon skill
		var weaponSkill models.WeaponSkill
		if err := database.DB.Where("name = ? AND game_system = ?", exp.WeaponSkillName, exp.SkillSystem).First(&weaponSkill).Error; err != nil {
			return fmt.Errorf("weapon skill not found: %s/%s", exp.WeaponSkillName, exp.SkillSystem)
		}

		// Find the category
		var category models.SkillCategory
		if err := database.DB.Where("name = ? AND game_system = ?", exp.CategoryName, exp.CategorySystem).First(&category).Error; err != nil {
			return fmt.Errorf("category not found: %s/%s", exp.CategoryName, exp.CategorySystem)
		}

		// Find the difficulty
		var difficulty models.SkillDifficulty
		if err := database.DB.Where("name = ? AND game_system = ?", exp.DifficultyName, exp.DifficultySystem).First(&difficulty).Error; err != nil {
			return fmt.Errorf("difficulty not found: %s/%s", exp.DifficultyName, exp.DifficultySystem)
		}

		// Check if relationship exists
		var wscd models.WeaponSkillCategoryDifficulty
		result := database.DB.Where("weapon_skill_id = ? AND skill_category_id = ? AND skill_difficulty_id = ?",
			weaponSkill.ID, category.ID, difficulty.ID).First(&wscd)

		if result.Error == gorm.ErrRecordNotFound {
			// Create new relationship
			wscd = models.WeaponSkillCategoryDifficulty{
				WeaponSkillID:     weaponSkill.ID,
				SkillCategoryID:   category.ID,
				SkillDifficultyID: difficulty.ID,
				LearnCost:         exp.LearnCost,
				SCategory:         category.Name,
				SDifficulty:       difficulty.Name,
			}
			if err := database.DB.Create(&wscd).Error; err != nil {
				return fmt.Errorf("failed to create relationship: %w", err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query relationship: %w", result.Error)
		} else {
			// Update existing relationship
			wscd.LearnCost = exp.LearnCost
			wscd.SCategory = category.Name
			wscd.SDifficulty = difficulty.Name

			if err := database.DB.Save(&wscd).Error; err != nil {
				return fmt.Errorf("failed to update relationship: %w", err)
			}
		}
	}

	return nil
}

// Helper functions for JSON I/O
func writeJSON(filename string, data interface{}) error {
	file, err := os.Create(filename)
	if err != nil {
		return fmt.Errorf("failed to create file %s: %w", filename, err)
	}
	defer file.Close()

	encoder := json.NewEncoder(file)
	encoder.SetIndent("", "  ")
	if err := encoder.Encode(data); err != nil {
		return fmt.Errorf("failed to encode JSON to %s: %w", filename, err)
	}

	return nil
}

func readJSON(filename string, data interface{}) error {
	file, err := os.Open(filename)
	if err != nil {
		return fmt.Errorf("failed to open file %s: %w", filename, err)
	}
	defer file.Close()

	decoder := json.NewDecoder(file)
	if err := decoder.Decode(data); err != nil {
		return fmt.Errorf("failed to decode JSON from %s: %w", filename, err)
	}

	return nil
}

// ExportSkillCategories exports all skill categories to a JSON file
func ExportSkillCategories(outputDir string) error {
	var categories []models.SkillCategory
	if err := database.DB.Find(&categories).Error; err != nil {
		return fmt.Errorf("failed to fetch skill categories: %w", err)
	}

	sourceMap := buildSourceMap()

	exportable := make([]ExportableSkillCategory, len(categories))
	for i, cat := range categories {
		exportable[i] = ExportableSkillCategory{
			Name:       cat.Name,
			GameSystem: cat.GameSystem,
			SourceCode: sourceMap[cat.SourceID],
		}
	}

	return writeJSON(filepath.Join(outputDir, "skill_categories.json"), exportable)
}

// ImportSkillCategories imports skill categories from a JSON file
func ImportSkillCategories(inputDir string) error {
	var exportable []ExportableSkillCategory
	if err := readJSON(filepath.Join(inputDir, "skill_categories.json"), &exportable); err != nil {
		return err
	}

	sourceMap := buildSourceMapReverse()

	for _, exp := range exportable {
		category := models.SkillCategory{
			Name:       exp.Name,
			GameSystem: exp.GameSystem,
			SourceID:   sourceMap[exp.SourceCode],
		}

		if err := findOrCreateByNameAndSystem(exp.Name, exp.GameSystem, &category, "skill category"); err != nil {
			return err
		}
	}

	return nil
}

// ExportSkillDifficulties exports all skill difficulties to a JSON file
func ExportSkillDifficulties(outputDir string) error {
	var difficulties []models.SkillDifficulty
	if err := database.DB.Find(&difficulties).Error; err != nil {
		return fmt.Errorf("failed to fetch skill difficulties: %w", err)
	}

	exportable := make([]ExportableSkillDifficulty, len(difficulties))
	for i, diff := range difficulties {
		exportable[i] = ExportableSkillDifficulty{
			Name:       diff.Name,
			GameSystem: diff.GameSystem,
		}
	}

	return writeJSON(filepath.Join(outputDir, "skill_difficulties.json"), exportable)
}

// ImportSkillDifficulties imports skill difficulties from a JSON file
func ImportSkillDifficulties(inputDir string) error {
	var exportable []ExportableSkillDifficulty
	if err := readJSON(filepath.Join(inputDir, "skill_difficulties.json"), &exportable); err != nil {
		return err
	}

	for _, exp := range exportable {
		difficulty := models.SkillDifficulty{
			Name:       exp.Name,
			GameSystem: exp.GameSystem,
		}

		if err := findOrCreateByNameAndSystem(exp.Name, exp.GameSystem, &difficulty, "skill difficulty"); err != nil {
			return err
		}
	}

	return nil
}

// ExportSpells exports all spells to a JSON file
func ExportSpells(outputDir string) error {
	var spells []models.Spell
	if err := database.DB.Find(&spells).Error; err != nil {
		return fmt.Errorf("failed to fetch spells: %w", err)
	}

	sourceMap := buildSourceMap()

	exportable := make([]ExportableSpell, len(spells))
	for i, spell := range spells {
		exportable[i] = ExportableSpell{
			Name:             spell.Name,
			GameSystem:       spell.GameSystem,
			GameSystemId:     spell.GameSystemId,
			Beschreibung:     spell.Beschreibung,
			SourceCode:       sourceMap[spell.SourceID],
			PageNumber:       spell.PageNumber,
			Bonus:            spell.Bonus,
			Stufe:            spell.Stufe,
			AP:               spell.AP,
			Art:              spell.Art,
			Zauberdauer:      spell.Zauberdauer,
			Reichweite:       spell.Reichweite,
			Wirkungsziel:     spell.Wirkungsziel,
			Wirkungsbereich:  spell.Wirkungsbereich,
			Wirkungsdauer:    spell.Wirkungsdauer,
			Ursprung:         spell.Ursprung,
			Category:         spell.Category,
			LearningCategory: spell.LearningCategory,
		}
	}

	return writeJSON(filepath.Join(outputDir, "spells.json"), exportable)
}

// ImportSpells imports spells from a JSON file
func ImportSpells(inputDir string) error {
	var exportable []ExportableSpell
	if err := readJSON(filepath.Join(inputDir, "spells.json"), &exportable); err != nil {
		return err
	}

	sourceMap := buildSourceMapReverse()

	if err := database.DB.AutoMigrate(&models.Spell{}); err != nil {
		return fmt.Errorf("failed to migrate spells table: %w", err)
	}

	gs := models.GetGameSystem(exportable[0].GameSystemId, exportable[0].GameSystem)
	for _, exp := range exportable {
		var spell models.Spell

		result := database.DB.Where("name = ? AND (game_system = ? OR game_system_id = ?)", exp.Name, gs.Name, gs.ID).First(&spell)

		sourceID := sourceMap[exp.SourceCode]

		if result.Error == gorm.ErrRecordNotFound {
			spell = models.Spell{
				Name:             exp.Name,
				GameSystem:       gs.Name,
				GameSystemId:     gs.ID,
				Beschreibung:     exp.Beschreibung,
				SourceID:         sourceID,
				PageNumber:       exp.PageNumber,
				Bonus:            exp.Bonus,
				Stufe:            exp.Stufe,
				AP:               exp.AP,
				Art:              exp.Art,
				Zauberdauer:      exp.Zauberdauer,
				Reichweite:       exp.Reichweite,
				Wirkungsziel:     exp.Wirkungsziel,
				Wirkungsbereich:  exp.Wirkungsbereich,
				Wirkungsdauer:    exp.Wirkungsdauer,
				Ursprung:         exp.Ursprung,
				Category:         exp.Category,
				LearningCategory: exp.LearningCategory,
			}
			if err := database.DB.Create(&spell).Error; err != nil {
				return fmt.Errorf("failed to create spell %s: %w", exp.Name, err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query spell %s: %w", exp.Name, result.Error)
		} else {
			// Update existing spell
			spell.Beschreibung = exp.Beschreibung
			spell.SourceID = sourceID
			spell.PageNumber = exp.PageNumber
			spell.Bonus = exp.Bonus
			spell.Stufe = exp.Stufe
			spell.AP = exp.AP
			spell.Art = exp.Art
			spell.Zauberdauer = exp.Zauberdauer
			spell.Reichweite = exp.Reichweite
			spell.Wirkungsziel = exp.Wirkungsziel
			spell.Wirkungsbereich = exp.Wirkungsbereich
			spell.Wirkungsdauer = exp.Wirkungsdauer
			spell.Ursprung = exp.Ursprung
			spell.Category = exp.Category
			spell.LearningCategory = exp.LearningCategory
			spell.GameSystemId = gs.ID
			spell.GameSystem = gs.Name

			if err := database.DB.Save(&spell).Error; err != nil {
				return fmt.Errorf("failed to update spell %s: %w", exp.Name, err)
			}
		}
	}

	return nil
}

// ExportCharacterClasses exports all character classes to a JSON file
func ExportCharacterClasses(outputDir string) error {
	var classes []models.CharacterClass
	if err := database.DB.Find(&classes).Error; err != nil {
		return fmt.Errorf("failed to fetch character classes: %w", err)
	}

	sourceMap := buildSourceMap()

	exportable := make([]ExportableCharacterClass, len(classes))
	for i, class := range classes {
		exportable[i] = ExportableCharacterClass{
			Code:        class.Code,
			Name:        class.Name,
			Description: class.Description,
			SourceCode:  sourceMap[class.SourceID],
			GameSystem:  class.GameSystem,
		}
	}

	return writeJSON(filepath.Join(outputDir, "character_classes.json"), exportable)
}

// ImportCharacterClasses imports character classes from a JSON file
func ImportCharacterClasses(inputDir string) error {
	var exportable []ExportableCharacterClass
	if err := readJSON(filepath.Join(inputDir, "character_classes.json"), &exportable); err != nil {
		return err
	}

	sourceMap := buildSourceMapReverse()

	for _, exp := range exportable {
		class := models.CharacterClass{
			Code:        exp.Code,
			Name:        exp.Name,
			Description: exp.Description,
			SourceID:    sourceMap[exp.SourceCode],
			GameSystem:  exp.GameSystem,
		}

		if err := findOrCreateByCode(exp.Code, &class, "character class"); err != nil {
			return err
		}
	}

	return nil
}

// ExportSpellSchools exports all spell schools to a JSON file
func ExportSpellSchools(outputDir string) error {
	var schools []models.SpellSchool
	if err := database.DB.Find(&schools).Error; err != nil {
		return fmt.Errorf("failed to fetch spell schools: %w", err)
	}

	sourceMap := buildSourceMap()

	exportable := make([]ExportableSpellSchool, len(schools))
	for i, school := range schools {
		exportable[i] = ExportableSpellSchool{
			Name:        school.Name,
			Description: school.Description,
			SourceCode:  sourceMap[school.SourceID],
			GameSystem:  school.GameSystem,
		}
	}

	return writeJSON(filepath.Join(outputDir, "spell_schools.json"), exportable)
}

// ImportSpellSchools imports spell schools from a JSON file
func ImportSpellSchools(inputDir string) error {
	var exportable []ExportableSpellSchool
	if err := readJSON(filepath.Join(inputDir, "spell_schools.json"), &exportable); err != nil {
		return err
	}

	// Get source map
	var sources []models.Source
	database.DB.Find(&sources)
	sourceMap := make(map[string]uint)
	for _, s := range sources {
		sourceMap[s.Code] = s.ID
	}

	for _, exp := range exportable {
		var school models.SpellSchool
		result := database.DB.Where("name = ? AND game_system = ?", exp.Name, exp.GameSystem).First(&school)

		sourceID := sourceMap[exp.SourceCode]

		if result.Error == gorm.ErrRecordNotFound {
			school = models.SpellSchool{
				Name:        exp.Name,
				Description: exp.Description,
				SourceID:    sourceID,
				GameSystem:  exp.GameSystem,
			}
			if err := database.DB.Create(&school).Error; err != nil {
				return fmt.Errorf("failed to create spell school %s: %w", exp.Name, err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query spell school %s: %w", exp.Name, result.Error)
		} else {
			school.Description = exp.Description
			school.SourceID = sourceID
			school.GameSystem = exp.GameSystem

			if err := database.DB.Save(&school).Error; err != nil {
				return fmt.Errorf("failed to update spell school %s: %w", exp.Name, err)
			}
		}
	}

	return nil
}

// Export/Import functions for ClassCategoryEPCost, ClassSpellSchoolEPCost, SpellLevelLECost
// SkillImprovementCost, WeaponSkill, Equipment, Weapon, Container, Transportation, Believe

// ExportClassCategoryEPCosts exports class-category EP costs
func ExportClassCategoryEPCosts(outputDir string) error {
	var costs []models.ClassCategoryEPCost
	if err := database.DB.Find(&costs).Error; err != nil {
		return fmt.Errorf("failed to fetch class category EP costs: %w", err)
	}

	// Build reverse maps for export (ID -> Code/Name)
	var classes []models.CharacterClass
	database.DB.Find(&classes)
	classMap := make(map[uint]string)
	for _, c := range classes {
		classMap[c.ID] = c.Code
	}

	var categories []models.SkillCategory
	database.DB.Find(&categories)
	categoryMap := make(map[uint]string)
	for _, cat := range categories {
		categoryMap[cat.ID] = cat.Name
	}

	exportable := make([]ExportableClassCategoryEPCost, len(costs))
	for i, cost := range costs {
		exportable[i] = ExportableClassCategoryEPCost{
			CharacterClassCode: classMap[cost.CharacterClassID],
			SkillCategoryName:  categoryMap[cost.SkillCategoryID],
			EPPerTE:            cost.EPPerTE,
		}
	}

	return writeJSON(filepath.Join(outputDir, "class_category_ep_costs.json"), exportable)
}

// ImportClassCategoryEPCosts imports class-category EP costs
func ImportClassCategoryEPCosts(inputDir string) error {
	var exportable []ExportableClassCategoryEPCost
	if err := readJSON(filepath.Join(inputDir, "class_category_ep_costs.json"), &exportable); err != nil {
		return err
	}

	classMap := buildCharacterClassMap()

	// Build category map (name -> id) - need to aggregate by name since we don't have game_system in the exportable
	var categories []models.SkillCategory
	database.DB.Find(&categories)
	categoryMap := make(map[string]uint)
	for _, cat := range categories {
		categoryMap[cat.Name] = cat.ID
	}

	for _, exp := range exportable {
		classID := classMap[exp.CharacterClassCode]
		categoryID := categoryMap[exp.SkillCategoryName]

		var cost models.ClassCategoryEPCost
		result := database.DB.Where("character_class_id = ? AND skill_category_id = ?", classID, categoryID).First(&cost)

		if result.Error == gorm.ErrRecordNotFound {
			cost = models.ClassCategoryEPCost{
				CharacterClassID: classID,
				SkillCategoryID:  categoryID,
				EPPerTE:          exp.EPPerTE,
				CCLass:           exp.CharacterClassCode,
				SCategory:        exp.SkillCategoryName,
			}
			if err := database.DB.Create(&cost).Error; err != nil {
				return fmt.Errorf("failed to create class category EP cost: %w", err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query class category EP cost: %w", result.Error)
		} else {
			cost.EPPerTE = exp.EPPerTE
			cost.CCLass = exp.CharacterClassCode
			cost.SCategory = exp.SkillCategoryName
			if err := database.DB.Save(&cost).Error; err != nil {
				return fmt.Errorf("failed to update class category EP cost: %w", err)
			}
		}
	}

	return nil
}

// ExportClassSpellSchoolEPCosts exports class-spell school EP costs
func ExportClassSpellSchoolEPCosts(outputDir string) error {
	var costs []models.ClassSpellSchoolEPCost
	if err := database.DB.Find(&costs).Error; err != nil {
		return fmt.Errorf("failed to fetch class spell school EP costs: %w", err)
	}

	// Build reverse maps for export
	var classes []models.CharacterClass
	database.DB.Find(&classes)
	classMap := make(map[uint]string)
	for _, c := range classes {
		classMap[c.ID] = c.Code
	}

	var schools []models.SpellSchool
	database.DB.Find(&schools)
	schoolMap := make(map[uint]string)
	for _, s := range schools {
		schoolMap[s.ID] = s.Name
	}

	exportable := make([]ExportableClassSpellSchoolEPCost, len(costs))
	for i, cost := range costs {
		exportable[i] = ExportableClassSpellSchoolEPCost{
			CharacterClassCode: classMap[cost.CharacterClassID],
			SpellSchoolName:    schoolMap[cost.SpellSchoolID],
			EPPerLE:            cost.EPPerLE,
		}
	}

	return writeJSON(filepath.Join(outputDir, "class_spell_school_ep_costs.json"), exportable)
}

// ImportClassSpellSchoolEPCosts imports class-spell school EP costs
func ImportClassSpellSchoolEPCosts(inputDir string) error {
	var exportable []ExportableClassSpellSchoolEPCost
	if err := readJSON(filepath.Join(inputDir, "class_spell_school_ep_costs.json"), &exportable); err != nil {
		return err
	}

	classMap := buildCharacterClassMap()

	// Build spell school map (name -> id)
	var schools []models.SpellSchool
	database.DB.Find(&schools)
	schoolMap := make(map[string]uint)
	for _, s := range schools {
		schoolMap[s.Name] = s.ID
	}

	for _, exp := range exportable {
		classID := classMap[exp.CharacterClassCode]
		schoolID := schoolMap[exp.SpellSchoolName]

		var cost models.ClassSpellSchoolEPCost
		result := database.DB.Where("character_class_id = ? AND spell_school_id = ?", classID, schoolID).First(&cost)

		if result.Error == gorm.ErrRecordNotFound {
			cost = models.ClassSpellSchoolEPCost{
				CharacterClassID: classID,
				SpellSchoolID:    schoolID,
				EPPerLE:          exp.EPPerLE,
				CCLass:           exp.CharacterClassCode,
				SCategory:        exp.SpellSchoolName,
			}
			if err := database.DB.Create(&cost).Error; err != nil {
				return fmt.Errorf("failed to create class spell school EP cost: %w", err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query class spell school EP cost: %w", result.Error)
		} else {
			cost.EPPerLE = exp.EPPerLE
			cost.CCLass = exp.CharacterClassCode
			cost.SCategory = exp.SpellSchoolName
			if err := database.DB.Save(&cost).Error; err != nil {
				return fmt.Errorf("failed to update class spell school EP cost: %w", err)
			}
		}
	}

	return nil
}

// ExportSpellLevelLECosts exports spell level LE costs
func ExportSpellLevelLECosts(outputDir string) error {
	var costs []models.SpellLevelLECost
	if err := database.DB.Find(&costs).Error; err != nil {
		return fmt.Errorf("failed to fetch spell level LE costs: %w", err)
	}

	exportable := make([]ExportableSpellLevelLECost, len(costs))
	for i, cost := range costs {
		exportable[i] = ExportableSpellLevelLECost{
			Level:        cost.Level,
			LERequired:   cost.LERequired,
			GameSystem:   cost.GameSystem,
			GameSystemId: cost.GameSystemId,
		}
	}

	return writeJSON(filepath.Join(outputDir, "spell_level_le_costs.json"), exportable)
}

// ImportSpellLevelLECosts imports spell level LE costs
func ImportSpellLevelLECosts(inputDir string) error {
	var exportable []ExportableSpellLevelLECost
	if err := readJSON(filepath.Join(inputDir, "spell_level_le_costs.json"), &exportable); err != nil {
		return err
	}

	for _, exp := range exportable {
		gs := models.GetGameSystem(exp.GameSystemId, exp.GameSystem)
		var cost models.SpellLevelLECost
		result := database.DB.Where("level = ? AND (game_system = ? OR game_system_id = ?)", exp.Level, gs.Name, gs.ID).First(&cost)

		if result.Error == gorm.ErrRecordNotFound {
			cost = models.SpellLevelLECost{
				Level:        exp.Level,
				LERequired:   exp.LERequired,
				GameSystem:   gs.Name,
				GameSystemId: gs.ID,
			}
			if err := cost.Create(); err != nil {
				return fmt.Errorf("failed to create spell level LE cost: %w", err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query spell level LE cost: %w", result.Error)
		} else {
			cost.LERequired = exp.LERequired
			cost.GameSystem = gs.Name
			cost.GameSystemId = gs.ID
			if err := cost.Save(); err != nil {
				return fmt.Errorf("failed to update spell level LE cost: %w", err)
			}
		}
	}

	return nil
}

// ExportSkillImprovementCosts exports all skill improvement costs to a JSON file
func ExportSkillImprovementCosts(outputDir string) error {
	var costs []models.SkillImprovementCost
	if err := database.DB.Find(&costs).Error; err != nil {
		return fmt.Errorf("failed to fetch skill improvement costs: %w", err)
	}

	exportable := make([]ExportableSkillImprovementCost, 0, len(costs))
	for _, cost := range costs {
		var lc models.SkillCategory
		if err := database.DB.First(&lc, cost.CategoryID).Error; err != nil {
			continue
		}
		var ld models.SkillDifficulty
		if err := database.DB.First(&ld, cost.DifficultyID).Error; err != nil {
			continue
		}
		var scd models.SkillCategoryDifficulty
		if err := database.DB.Where("skill_category = ? AND skill_difficulty = ?", lc.Name, ld.Name).First(&scd).Error; err != nil {
			continue
		}
		var skill models.Skill
		if err := database.DB.First(&skill, scd.SkillID).Error; err != nil {
			continue
		}

		exportable = append(exportable, ExportableSkillImprovementCost{
			SkillName:        skill.Name,
			SkillSystem:      skill.GameSystem,
			CategoryName:     lc.Name,
			CategorySystem:   lc.GameSystem,
			DifficultyName:   ld.Name,
			DifficultySystem: ld.GameSystem,
			CurrentLevel:     cost.CurrentLevel,
			TERequired:       cost.TERequired,
		})
	}

	return writeJSON(filepath.Join(outputDir, "skill_improvement_costs.json"), exportable)
}

// ImportSkillImprovementCosts imports skill improvement costs from a JSON file
func ImportSkillImprovementCosts(inputDir string) error {
	var exportable []ExportableSkillImprovementCost
	if err := readJSON(filepath.Join(inputDir, "skill_improvement_costs.json"), &exportable); err != nil {
		return err
	}

	// Build lookup maps using helpers
	skillMap := buildSkillMap()
	categoryMap := buildCategoryMap()
	difficultyMap := buildDifficultyMap()

	for _, exp := range exportable {
		// Find skill ID
		skillID, ok := skillMap[exp.SkillSystem][exp.SkillName]
		if !ok {
			return fmt.Errorf("skill not found: %s (%s)", exp.SkillName, exp.SkillSystem)
		}

		// Find category ID
		categoryID, ok := categoryMap[exp.CategorySystem][exp.CategoryName]
		if !ok {
			return fmt.Errorf("category not found: %s (%s)", exp.CategoryName, exp.CategorySystem)
		}

		// Find difficulty ID
		difficultyID, ok := difficultyMap[exp.DifficultySystem][exp.DifficultyName]
		if !ok {
			return fmt.Errorf("difficulty not found: %s (%s)", exp.DifficultyName, exp.DifficultySystem)
		}

		// Find SkillCategoryDifficulty
		var scd models.SkillCategoryDifficulty
		if err := database.DB.Where("skill_id = ? AND skill_category_id = ? AND skill_difficulty_id = ?",
			skillID, categoryID, difficultyID).First(&scd).Error; err != nil {
			return fmt.Errorf("skill category difficulty not found for %s/%s/%s: %w",
				exp.SkillName, exp.CategoryName, exp.DifficultyName, err)
		}

		// Find or create SkillImprovementCost using category/difficulty IDs
		var cost models.SkillImprovementCost
		result := database.DB.Where("skill_category_id = ? AND skill_difficulty_id = ? AND current_level = ?",
			categoryID, difficultyID, exp.CurrentLevel).First(&cost)

		if result.Error == gorm.ErrRecordNotFound {
			cost = models.SkillImprovementCost{
				CategoryID:   categoryID,
				DifficultyID: difficultyID,
				CurrentLevel: exp.CurrentLevel,
				TERequired:   exp.TERequired,
			}
			if err := database.DB.Create(&cost).Error; err != nil {
				return fmt.Errorf("failed to create skill improvement cost: %w", err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query skill improvement cost: %w", result.Error)
		} else {
			cost.TERequired = exp.TERequired
			if err := database.DB.Save(&cost).Error; err != nil {
				return fmt.Errorf("failed to update skill improvement cost: %w", err)
			}
		}
	}

	return nil
}

// ExportWeaponSkills exports all weapon skills to a JSON file
func ExportWeaponSkills(outputDir string) error {
	var skills []models.WeaponSkill
	if err := database.DB.Find(&skills).Error; err != nil {
		return fmt.Errorf("failed to fetch weapon skills: %w", err)
	}

	sourceMap := buildSourceMap()

	// Get all weapon skill category difficulties
	var wscds []models.WeaponSkillCategoryDifficulty
	database.DB.Preload("SkillCategory").Preload("SkillDifficulty").Find(&wscds)

	// Build map of weapon_skill_id -> []category/difficulty combinations
	wscdMap := make(map[uint][]ExportableCategoryDifficulty)
	for _, wscd := range wscds {
		wscdMap[wscd.WeaponSkillID] = append(wscdMap[wscd.WeaponSkillID], ExportableCategoryDifficulty{
			Category:   wscd.SkillCategory.Name,
			Difficulty: wscd.SkillDifficulty.Name,
			LearnCost:  wscd.LearnCost,
		})
	}

	exportable := make([]ExportableWeaponSkill, len(skills))
	for i, skill := range skills {
		exportable[i] = ExportableWeaponSkill{
			Name:                   skill.Name,
			GameSystem:             skill.GameSystem,
			GameSystemId:           skill.GameSystemId,
			Beschreibung:           skill.Beschreibung,
			SourceCode:             sourceMap[skill.SourceID],
			PageNumber:             skill.PageNumber,
			Initialwert:            skill.Initialwert,
			BasisWert:              skill.BasisWert,
			Bonuseigenschaft:       skill.Bonuseigenschaft,
			Improvable:             skill.Improvable,
			InnateSkill:            skill.InnateSkill,
			Category:               skill.Category,
			Difficulty:             skill.Difficulty,
			CategoriesDifficulties: wscdMap[skill.ID],
		}
	}

	return writeJSON(filepath.Join(outputDir, "weapon_skills.json"), exportable)
}

// ImportWeaponSkills imports weapon skills from a JSON file
func ImportWeaponSkills(inputDir string) error {
	var exportable []ExportableWeaponSkill
	if err := readJSON(filepath.Join(inputDir, "weapon_skills.json"), &exportable); err != nil {
		return err
	}

	if err := database.DB.AutoMigrate(&models.Skill{}, &models.WeaponSkill{}); err != nil {
		return fmt.Errorf("failed to migrate weapon skills: %w", err)
	}

	sourceMap := buildSourceMapReverse()

	for _, exp := range exportable {
		var skill models.WeaponSkill
		gs := models.GetGameSystem(exp.GameSystemId, exp.GameSystem)
		effectiveName := exp.GameSystem
		if effectiveName == "" {
			effectiveName = gs.Name
		}
		effectiveID := gs.ID
		if effectiveID == 0 {
			effectiveID = models.GetGameSystem(0, "").ID
		}

		result := database.DB.Where("name = ? AND (game_system = ? OR game_system_id = ?)", exp.Name, effectiveName, effectiveID).First(&skill)

		sourceID := sourceMap[exp.SourceCode]

		if result.Error == gorm.ErrRecordNotFound {
			skill = models.WeaponSkill{
				Skill: models.Skill{
					Name:             exp.Name,
					GameSystem:       effectiveName,
					GameSystemId:     effectiveID,
					Beschreibung:     exp.Beschreibung,
					SourceID:         sourceID,
					PageNumber:       exp.PageNumber,
					Initialwert:      exp.Initialwert,
					BasisWert:        exp.BasisWert,
					Bonuseigenschaft: exp.Bonuseigenschaft,
					Improvable:       exp.Improvable,
					InnateSkill:      exp.InnateSkill,
					Category:         exp.Category,
					Difficulty:       exp.Difficulty,
				},
			}
			if err := database.DB.Create(&skill).Error; err != nil {
				return fmt.Errorf("failed to create weapon skill %s: %w", exp.Name, err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query weapon skill %s: %w", exp.Name, result.Error)
		} else {
			skill.Beschreibung = exp.Beschreibung
			skill.SourceID = sourceID
			skill.PageNumber = exp.PageNumber
			skill.Initialwert = exp.Initialwert
			skill.BasisWert = exp.BasisWert
			skill.Bonuseigenschaft = exp.Bonuseigenschaft
			skill.Improvable = exp.Improvable
			skill.InnateSkill = exp.InnateSkill
			skill.Category = exp.Category
			skill.Difficulty = exp.Difficulty
			skill.GameSystemId = effectiveID
			skill.GameSystem = effectiveName

			if err := database.DB.Save(&skill).Error; err != nil {
				return fmt.Errorf("failed to update weapon skill %s: %w", exp.Name, err)
			}
		}

		// Handle category/difficulty relationships if present
		if len(exp.CategoriesDifficulties) > 0 {
			// Delete existing relationships
			database.DB.Where("weapon_skill_id = ?", skill.ID).Delete(&models.WeaponSkillCategoryDifficulty{})

			// Create new relationships
			for _, cd := range exp.CategoriesDifficulties {
				var category models.SkillCategory
				var difficulty models.SkillDifficulty

				if err := database.DB.Where("name = ?", cd.Category).First(&category).Error; err != nil {
					continue // Skip if category not found
				}
				if err := database.DB.Where("name = ?", cd.Difficulty).First(&difficulty).Error; err != nil {
					continue // Skip if difficulty not found
				}

				wscd := models.WeaponSkillCategoryDifficulty{
					WeaponSkillID:     skill.ID,
					SkillCategoryID:   category.ID,
					SkillDifficultyID: difficulty.ID,
					LearnCost:         cd.LearnCost,
					SCategory:         category.Name,
					SDifficulty:       difficulty.Name,
				}
				if err := database.DB.Create(&wscd).Error; err != nil {
					return fmt.Errorf("failed to create weapon skill category difficulty: %w", err)
				}
			}
		}
	}

	return nil
}

// ExportEquipment exports all equipment to a JSON file
func ExportEquipment(outputDir string) error {
	var equipment []models.Equipment
	if err := database.DB.Find(&equipment).Error; err != nil {
		return fmt.Errorf("failed to fetch equipment: %w", err)
	}

	sourceMap := buildSourceMap()

	exportable := make([]ExportableEquipment, len(equipment))
	for i, eq := range equipment {
		exportable[i] = ExportableEquipment{
			Name:         eq.Name,
			GameSystem:   eq.GameSystem,
			Beschreibung: eq.Beschreibung,
			SourceCode:   sourceMap[eq.SourceID],
			PageNumber:   eq.PageNumber,
			Gewicht:      eq.Gewicht,
			Wert:         eq.Wert,
			PersonalItem: eq.PersonalItem,
		}
	}

	return writeJSON(filepath.Join(outputDir, "equipment.json"), exportable)
}

// ImportEquipment imports equipment from a JSON file
func ImportEquipment(inputDir string) error {
	var exportable []ExportableEquipment
	if err := readJSON(filepath.Join(inputDir, "equipment.json"), &exportable); err != nil {
		return err
	}

	sourceMap := buildSourceMapReverse()

	for _, exp := range exportable {
		var eq models.Equipment
		result := database.DB.Where("name = ? AND game_system = ?", exp.Name, exp.GameSystem).First(&eq)

		sourceID := sourceMap[exp.SourceCode]

		if result.Error == gorm.ErrRecordNotFound {
			eq = models.Equipment{
				Name:         exp.Name,
				GameSystem:   exp.GameSystem,
				Beschreibung: exp.Beschreibung,
				SourceID:     sourceID,
				PageNumber:   exp.PageNumber,
				Gewicht:      exp.Gewicht,
				Wert:         exp.Wert,
				PersonalItem: exp.PersonalItem,
			}
			if err := database.DB.Create(&eq).Error; err != nil {
				return fmt.Errorf("failed to create equipment %s: %w", exp.Name, err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query equipment %s: %w", exp.Name, result.Error)
		} else {
			eq.Beschreibung = exp.Beschreibung
			eq.SourceID = sourceID
			eq.PageNumber = exp.PageNumber
			eq.Gewicht = exp.Gewicht
			eq.Wert = exp.Wert
			eq.PersonalItem = exp.PersonalItem

			if err := database.DB.Save(&eq).Error; err != nil {
				return fmt.Errorf("failed to update equipment %s: %w", exp.Name, err)
			}
		}
	}

	return nil
}

// ExportWeapons exports all weapons to a JSON file
func ExportWeapons(outputDir string) error {
	var weapons []models.Weapon
	if err := database.DB.Find(&weapons).Error; err != nil {
		return fmt.Errorf("failed to fetch weapons: %w", err)
	}

	sourceMap := buildSourceMap()

	exportable := make([]ExportableWeapon, len(weapons))
	for i, weapon := range weapons {
		exportable[i] = ExportableWeapon{
			Name:          weapon.Name,
			GameSystem:    weapon.GameSystem,
			Beschreibung:  weapon.Beschreibung,
			SourceCode:    sourceMap[weapon.SourceID],
			PageNumber:    weapon.PageNumber,
			Gewicht:       weapon.Gewicht,
			Wert:          weapon.Wert,
			PersonalItem:  weapon.PersonalItem,
			SkillRequired: weapon.SkillRequired,
			Damage:        weapon.Damage,
			RangeNear:     weapon.RangeNear,
			RangeMiddle:   weapon.RangeMiddle,
			RangeFar:      weapon.RangeFar,
		}
	}

	return writeJSON(filepath.Join(outputDir, "weapons.json"), exportable)
}

// ImportWeapons imports weapons from a JSON file
func ImportWeapons(inputDir string) error {
	var exportable []ExportableWeapon
	if err := readJSON(filepath.Join(inputDir, "weapons.json"), &exportable); err != nil {
		return err
	}

	sourceMap := buildSourceMapReverse()

	for _, exp := range exportable {
		var weapon models.Weapon
		result := database.DB.Where("name = ? AND game_system = ?", exp.Name, exp.GameSystem).First(&weapon)

		sourceID := sourceMap[exp.SourceCode]

		if result.Error == gorm.ErrRecordNotFound {
			weapon = models.Weapon{
				Equipment: models.Equipment{
					Name:         exp.Name,
					GameSystem:   exp.GameSystem,
					Beschreibung: exp.Beschreibung,
					SourceID:     sourceID,
					PageNumber:   exp.PageNumber,
					Gewicht:      exp.Gewicht,
					Wert:         exp.Wert,
					PersonalItem: exp.PersonalItem,
				},
				SkillRequired: exp.SkillRequired,
				Damage:        exp.Damage,
				RangeNear:     exp.RangeNear,
				RangeMiddle:   exp.RangeMiddle,
				RangeFar:      exp.RangeFar,
			}
			if err := database.DB.Create(&weapon).Error; err != nil {
				return fmt.Errorf("failed to create weapon %s: %w", exp.Name, err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query weapon %s: %w", exp.Name, result.Error)
		} else {
			weapon.Beschreibung = exp.Beschreibung
			weapon.SourceID = sourceID
			weapon.PageNumber = exp.PageNumber
			weapon.Gewicht = exp.Gewicht
			weapon.Wert = exp.Wert
			weapon.PersonalItem = exp.PersonalItem
			weapon.SkillRequired = exp.SkillRequired
			weapon.Damage = exp.Damage
			weapon.RangeNear = exp.RangeNear
			weapon.RangeMiddle = exp.RangeMiddle
			weapon.RangeFar = exp.RangeFar

			if err := database.DB.Save(&weapon).Error; err != nil {
				return fmt.Errorf("failed to update weapon %s: %w", exp.Name, err)
			}
		}
	}

	return nil
}

// ExportContainers exports all containers to a JSON file
func ExportContainers(outputDir string) error {
	var containers []models.Container
	if err := database.DB.Find(&containers).Error; err != nil {
		return fmt.Errorf("failed to fetch containers: %w", err)
	}

	sourceMap := buildSourceMap()

	exportable := make([]ExportableContainer, len(containers))
	for i, container := range containers {
		exportable[i] = ExportableContainer{
			Name:         container.Name,
			GameSystem:   container.GameSystem,
			Beschreibung: container.Beschreibung,
			SourceCode:   sourceMap[container.SourceID],
			PageNumber:   container.PageNumber,
			Gewicht:      container.Gewicht,
			Wert:         container.Wert,
			PersonalItem: container.PersonalItem,
			Tragkraft:    container.Tragkraft,
			Volumen:      container.Volumen,
		}
	}

	return writeJSON(filepath.Join(outputDir, "containers.json"), exportable)
}

// ImportContainers imports containers from a JSON file
func ImportContainers(inputDir string) error {
	var exportable []ExportableContainer
	if err := readJSON(filepath.Join(inputDir, "containers.json"), &exportable); err != nil {
		return err
	}

	sourceMap := buildSourceMapReverse()

	for _, exp := range exportable {
		var container models.Container
		result := database.DB.Where("name = ? AND game_system = ?", exp.Name, exp.GameSystem).First(&container)

		sourceID := sourceMap[exp.SourceCode]

		if result.Error == gorm.ErrRecordNotFound {
			container = models.Container{
				Equipment: models.Equipment{
					Name:         exp.Name,
					GameSystem:   exp.GameSystem,
					Beschreibung: exp.Beschreibung,
					SourceID:     sourceID,
					PageNumber:   exp.PageNumber,
					Gewicht:      exp.Gewicht,
					Wert:         exp.Wert,
					PersonalItem: exp.PersonalItem,
				},
				Tragkraft: exp.Tragkraft,
				Volumen:   exp.Volumen,
			}
			if err := database.DB.Create(&container).Error; err != nil {
				return fmt.Errorf("failed to create container %s: %w", exp.Name, err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query container %s: %w", exp.Name, result.Error)
		} else {
			container.Beschreibung = exp.Beschreibung
			container.SourceID = sourceID
			container.PageNumber = exp.PageNumber
			container.Gewicht = exp.Gewicht
			container.Wert = exp.Wert
			container.PersonalItem = exp.PersonalItem
			container.Tragkraft = exp.Tragkraft
			container.Volumen = exp.Volumen

			if err := database.DB.Save(&container).Error; err != nil {
				return fmt.Errorf("failed to update container %s: %w", exp.Name, err)
			}
		}
	}

	return nil
}

// ExportTransportation exports all transportation to a JSON file
func ExportTransportation(outputDir string) error {
	var transportation []models.Transportation
	if err := database.DB.Find(&transportation).Error; err != nil {
		return fmt.Errorf("failed to fetch transportation: %w", err)
	}

	sourceMap := buildSourceMap()

	exportable := make([]ExportableTransportation, len(transportation))
	for i, trans := range transportation {
		exportable[i] = ExportableTransportation{
			Name:         trans.Name,
			GameSystem:   trans.GameSystem,
			Beschreibung: trans.Beschreibung,
			SourceCode:   sourceMap[trans.SourceID],
			PageNumber:   trans.PageNumber,
			Gewicht:      trans.Gewicht,
			Wert:         trans.Wert,
			PersonalItem: trans.PersonalItem,
			Tragkraft:    trans.Tragkraft,
			Volumen:      trans.Volumen,
		}
	}

	return writeJSON(filepath.Join(outputDir, "transportation.json"), exportable)
}

// ImportTransportation imports transportation from a JSON file
func ImportTransportation(inputDir string) error {
	var exportable []ExportableTransportation
	if err := readJSON(filepath.Join(inputDir, "transportation.json"), &exportable); err != nil {
		return err
	}

	sourceMap := buildSourceMapReverse()

	for _, exp := range exportable {
		var trans models.Transportation
		result := database.DB.Where("name = ? AND game_system = ?", exp.Name, exp.GameSystem).First(&trans)

		sourceID := sourceMap[exp.SourceCode]

		if result.Error == gorm.ErrRecordNotFound {
			trans = models.Transportation{
				Container: models.Container{
					Equipment: models.Equipment{
						Name:         exp.Name,
						GameSystem:   exp.GameSystem,
						Beschreibung: exp.Beschreibung,
						SourceID:     sourceID,
						PageNumber:   exp.PageNumber,
						Gewicht:      exp.Gewicht,
						Wert:         exp.Wert,
						PersonalItem: exp.PersonalItem,
					},
					Tragkraft: exp.Tragkraft,
					Volumen:   exp.Volumen,
				},
			}
			if err := database.DB.Create(&trans).Error; err != nil {
				return fmt.Errorf("failed to create transportation %s: %w", exp.Name, err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query transportation %s: %w", exp.Name, result.Error)
		} else {
			trans.Beschreibung = exp.Beschreibung
			trans.SourceID = sourceID
			trans.PageNumber = exp.PageNumber
			trans.Gewicht = exp.Gewicht
			trans.Wert = exp.Wert
			trans.PersonalItem = exp.PersonalItem
			trans.Tragkraft = exp.Tragkraft
			trans.Volumen = exp.Volumen

			if err := database.DB.Save(&trans).Error; err != nil {
				return fmt.Errorf("failed to update transportation %s: %w", exp.Name, err)
			}
		}
	}

	return nil
}

// ExportBelieves exports all beliefs to a JSON file
func ExportBelieves(outputDir string) error {
	var believes []models.Believe
	if err := database.DB.Find(&believes).Error; err != nil {
		return fmt.Errorf("failed to fetch believes: %w", err)
	}

	sourceMap := buildSourceMap()

	exportable := make([]ExportableBelieve, len(believes))
	for i, believe := range believes {
		exportable[i] = ExportableBelieve{
			Name:         believe.Name,
			GameSystem:   believe.GameSystem,
			Beschreibung: believe.Beschreibung,
			SourceCode:   sourceMap[believe.SourceID],
			PageNumber:   believe.PageNumber,
		}
	}

	return writeJSON(filepath.Join(outputDir, "believes.json"), exportable)
}

// ImportBelieves imports believes from a JSON file
func ImportBelieves(inputDir string) error {
	var exportable []ExportableBelieve
	if err := readJSON(filepath.Join(inputDir, "believes.json"), &exportable); err != nil {
		return err
	}

	sourceMap := buildSourceMapReverse()

	for _, exp := range exportable {
		var believe models.Believe
		result := database.DB.Where("name = ? AND game_system = ?", exp.Name, exp.GameSystem).First(&believe)

		sourceID := sourceMap[exp.SourceCode]

		if result.Error == gorm.ErrRecordNotFound {
			believe = models.Believe{
				Name:         exp.Name,
				GameSystem:   exp.GameSystem,
				Beschreibung: exp.Beschreibung,
				SourceID:     sourceID,
				PageNumber:   exp.PageNumber,
			}
			if err := database.DB.Create(&believe).Error; err != nil {
				return fmt.Errorf("failed to create believe %s: %w", exp.Name, err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query believe %s: %w", exp.Name, result.Error)
		} else {
			believe.Beschreibung = exp.Beschreibung
			believe.SourceID = sourceID
			believe.PageNumber = exp.PageNumber

			if err := database.DB.Save(&believe).Error; err != nil {
				return fmt.Errorf("failed to update believe %s: %w", exp.Name, err)
			}
		}
	}

	return nil
}

// ExportClassCategoryLearningPoints exports class category learning points to a JSON file
func ExportClassCategoryLearningPoints(outputDir string) error {
	var records []models.ClassCategoryLearningPoints
	if err := database.DB.Preload("CharacterClass").Preload("SkillCategory").Find(&records).Error; err != nil {
		return fmt.Errorf("failed to fetch class category learning points: %w", err)
	}

	exportable := make([]ExportableClassCategoryLearningPoints, len(records))
	for i, record := range records {
		exportable[i] = ExportableClassCategoryLearningPoints{
			ClassName:      record.CharacterClass.Name,
			ClassSystem:    record.CharacterClass.GameSystem,
			CategoryName:   record.SkillCategory.Name,
			CategorySystem: record.SkillCategory.GameSystem,
			Points:         record.Points,
		}
	}

	return writeJSON(filepath.Join(outputDir, "class_category_learning_points.json"), exportable)
}

// ImportClassCategoryLearningPoints imports class category learning points from a JSON file
func ImportClassCategoryLearningPoints(inputDir string) error {
	var exportable []ExportableClassCategoryLearningPoints
	if err := readJSON(filepath.Join(inputDir, "class_category_learning_points.json"), &exportable); err != nil {
		return err
	}

	for _, exp := range exportable {
		// Find class
		var class models.CharacterClass
		if err := database.DB.Where("name = ? AND game_system = ?", exp.ClassName, exp.ClassSystem).First(&class).Error; err != nil {
			return fmt.Errorf("failed to find class %s: %w", exp.ClassName, err)
		}

		// Find category
		var category models.SkillCategory
		if err := database.DB.Where("name = ? AND game_system = ?", exp.CategoryName, exp.CategorySystem).First(&category).Error; err != nil {
			return fmt.Errorf("failed to find category %s: %w", exp.CategoryName, err)
		}

		// Check if record exists
		var record models.ClassCategoryLearningPoints
		result := database.DB.Where("character_class_id = ? AND skill_category_id = ?", class.ID, category.ID).First(&record)

		if result.Error == gorm.ErrRecordNotFound {
			record = models.ClassCategoryLearningPoints{
				CharacterClassID: class.ID,
				SkillCategoryID:  category.ID,
				Points:           exp.Points,
			}
			if err := database.DB.Create(&record).Error; err != nil {
				return fmt.Errorf("failed to create class category learning points: %w", err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query class category learning points: %w", result.Error)
		} else {
			record.Points = exp.Points
			if err := database.DB.Save(&record).Error; err != nil {
				return fmt.Errorf("failed to update class category learning points: %w", err)
			}
		}
	}

	return nil
}

// ExportClassSpellPoints exports class spell points to a JSON file
func ExportClassSpellPoints(outputDir string) error {
	var records []models.ClassSpellPoints
	if err := database.DB.Preload("CharacterClass").Find(&records).Error; err != nil {
		return fmt.Errorf("failed to fetch class spell points: %w", err)
	}

	exportable := make([]ExportableClassSpellPoints, len(records))
	for i, record := range records {
		exportable[i] = ExportableClassSpellPoints{
			ClassName:   record.CharacterClass.Name,
			ClassSystem: record.CharacterClass.GameSystem,
			SpellPoints: record.SpellPoints,
		}
	}

	return writeJSON(filepath.Join(outputDir, "class_spell_points.json"), exportable)
}

// ImportClassSpellPoints imports class spell points from a JSON file
func ImportClassSpellPoints(inputDir string) error {
	var exportable []ExportableClassSpellPoints
	if err := readJSON(filepath.Join(inputDir, "class_spell_points.json"), &exportable); err != nil {
		return err
	}

	for _, exp := range exportable {
		// Find class
		var class models.CharacterClass
		if err := database.DB.Where("name = ? AND game_system = ?", exp.ClassName, exp.ClassSystem).First(&class).Error; err != nil {
			return fmt.Errorf("failed to find class %s: %w", exp.ClassName, err)
		}

		// Check if record exists
		var record models.ClassSpellPoints
		result := database.DB.Where("character_class_id = ?", class.ID).First(&record)

		if result.Error == gorm.ErrRecordNotFound {
			record = models.ClassSpellPoints{
				CharacterClassID: class.ID,
				SpellPoints:      exp.SpellPoints,
			}
			if err := database.DB.Create(&record).Error; err != nil {
				return fmt.Errorf("failed to create class spell points: %w", err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query class spell points: %w", result.Error)
		} else {
			record.SpellPoints = exp.SpellPoints
			if err := database.DB.Save(&record).Error; err != nil {
				return fmt.Errorf("failed to update class spell points: %w", err)
			}
		}
	}

	return nil
}

// ExportClassTypicalSkills exports class typical skills to a JSON file
func ExportClassTypicalSkills(outputDir string) error {
	var records []models.ClassTypicalSkill
	if err := database.DB.Preload("CharacterClass").Preload("Skill").Find(&records).Error; err != nil {
		return fmt.Errorf("failed to fetch class typical skills: %w", err)
	}

	exportable := make([]ExportableClassTypicalSkill, len(records))
	for i, record := range records {
		exportable[i] = ExportableClassTypicalSkill{
			ClassName:   record.CharacterClass.Name,
			ClassSystem: record.CharacterClass.GameSystem,
			SkillName:   record.Skill.Name,
			SkillSystem: record.Skill.GameSystem,
			Bonus:       record.Bonus,
			Attribute:   record.Attribute,
			Notes:       record.Notes,
		}
	}

	return writeJSON(filepath.Join(outputDir, "class_typical_skills.json"), exportable)
}

// ImportClassTypicalSkills imports class typical skills from a JSON file
func ImportClassTypicalSkills(inputDir string) error {
	var exportable []ExportableClassTypicalSkill
	if err := readJSON(filepath.Join(inputDir, "class_typical_skills.json"), &exportable); err != nil {
		return err
	}

	for _, exp := range exportable {
		// Find class
		var class models.CharacterClass
		if err := database.DB.Where("name = ? AND game_system = ?", exp.ClassName, exp.ClassSystem).First(&class).Error; err != nil {
			return fmt.Errorf("failed to find class %s: %w", exp.ClassName, err)
		}

		// Find skill
		var skill models.Skill
		if err := database.DB.Where("name = ? AND game_system = ?", exp.SkillName, exp.SkillSystem).First(&skill).Error; err != nil {
			return fmt.Errorf("failed to find skill %s: %w", exp.SkillName, err)
		}

		// Check if record exists
		var record models.ClassTypicalSkill
		result := database.DB.Where("character_class_id = ? AND skill_id = ?", class.ID, skill.ID).First(&record)

		if result.Error == gorm.ErrRecordNotFound {
			record = models.ClassTypicalSkill{
				CharacterClassID: class.ID,
				SkillID:          skill.ID,
				Bonus:            exp.Bonus,
				Attribute:        exp.Attribute,
				Notes:            exp.Notes,
			}
			if err := database.DB.Create(&record).Error; err != nil {
				return fmt.Errorf("failed to create class typical skill: %w", err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query class typical skill: %w", result.Error)
		} else {
			record.Bonus = exp.Bonus
			record.Attribute = exp.Attribute
			record.Notes = exp.Notes
			if err := database.DB.Save(&record).Error; err != nil {
				return fmt.Errorf("failed to update class typical skill: %w", err)
			}
		}
	}

	return nil
}

// ExportClassTypicalSpells exports class typical spells to a JSON file
func ExportClassTypicalSpells(outputDir string) error {
	var records []models.ClassTypicalSpell
	if err := database.DB.Preload("CharacterClass").Preload("Spell").Find(&records).Error; err != nil {
		return fmt.Errorf("failed to fetch class typical spells: %w", err)
	}

	exportable := make([]ExportableClassTypicalSpell, len(records))
	for i, record := range records {
		exportable[i] = ExportableClassTypicalSpell{
			ClassName:   record.CharacterClass.Name,
			ClassSystem: record.CharacterClass.GameSystem,
			SpellName:   record.Spell.Name,
			SpellSystem: record.Spell.GameSystem,
			Notes:       record.Notes,
		}
	}

	return writeJSON(filepath.Join(outputDir, "class_typical_spells.json"), exportable)
}

// ImportClassTypicalSpells imports class typical spells from a JSON file
func ImportClassTypicalSpells(inputDir string) error {
	var exportable []ExportableClassTypicalSpell
	if err := readJSON(filepath.Join(inputDir, "class_typical_spells.json"), &exportable); err != nil {
		return err
	}

	for _, exp := range exportable {
		// Find class
		var class models.CharacterClass
		if err := database.DB.Where("name = ? AND game_system = ?", exp.ClassName, exp.ClassSystem).First(&class).Error; err != nil {
			return fmt.Errorf("failed to find class %s: %w", exp.ClassName, err)
		}

		// Find spell
		var spell models.Spell
		if err := database.DB.Where("name = ? AND game_system = ?", exp.SpellName, exp.SpellSystem).First(&spell).Error; err != nil {
			return fmt.Errorf("failed to find spell %s: %w", exp.SpellName, err)
		}

		// Check if record exists
		var record models.ClassTypicalSpell
		result := database.DB.Where("character_class_id = ? AND spell_id = ?", class.ID, spell.ID).First(&record)

		if result.Error == gorm.ErrRecordNotFound {
			record = models.ClassTypicalSpell{
				CharacterClassID: class.ID,
				SpellID:          spell.ID,
				Notes:            exp.Notes,
			}
			if err := database.DB.Create(&record).Error; err != nil {
				return fmt.Errorf("failed to create class typical spell: %w", err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query class typical spell: %w", result.Error)
		} else {
			record.Notes = exp.Notes
			if err := database.DB.Save(&record).Error; err != nil {
				return fmt.Errorf("failed to update class typical spell: %w", err)
			}
		}
	}

	return nil
}

// ExportMiscLookups exports miscellaneous lookup values to a JSON file
func ExportMiscLookups(outputDir string) error {
	var lookups []models.MiscLookup
	if err := database.DB.Find(&lookups).Error; err != nil {
		return fmt.Errorf("failed to fetch misc lookups: %w", err)
	}

	sourceMap := buildSourceMap()

	exportable := make([]ExportableMiscLookup, len(lookups))
	for i, lookup := range lookups {
		exportable[i] = ExportableMiscLookup{
			Key:          lookup.Key,
			Value:        lookup.Value,
			SourceCode:   sourceMap[lookup.SourceID],
			PageNumber:   lookup.PageNumber,
			GameSystemId: lookup.GameSystemId,
		}
	}

	return writeJSON(filepath.Join(outputDir, "misc_lookups.json"), exportable)
}

// ImportMiscLookups imports miscellaneous lookup values from a JSON file
func ImportMiscLookups(inputDir string) error {
	var exportable []ExportableMiscLookup
	if err := readJSON(filepath.Join(inputDir, "misc_lookups.json"), &exportable); err != nil {
		return err
	}

	sourceMap := buildSourceMapReverse()

	// ensure new columns exist when importing older exports
	if err := database.DB.AutoMigrate(&models.MiscLookup{}); err != nil {
		return fmt.Errorf("failed to migrate misc lookup table: %w", err)
	}

	gs := models.GetGameSystem(exportable[0].GameSystemId, "")
	for _, exp := range exportable {
		var lookup models.MiscLookup
		result := database.DB.Where("key = ? AND (game_system_id = ? OR game_system_id = 0)", exp.Key, gs.ID).First(&lookup)

		sourceID := sourceMap[exp.SourceCode]

		if result.Error == gorm.ErrRecordNotFound {
			lookup = models.MiscLookup{
				Key:          exp.Key,
				Value:        exp.Value,
				SourceID:     sourceID,
				PageNumber:   exp.PageNumber,
				GameSystemId: gs.ID,
			}
			if err := database.DB.Create(&lookup).Error; err != nil {
				return fmt.Errorf("failed to create misc lookup %s: %w", exp.Key, err)
			}
		} else if result.Error != nil {
			return fmt.Errorf("failed to query misc lookup %s: %w", exp.Key, result.Error)
		} else {
			lookup.Value = exp.Value
			lookup.SourceID = sourceID
			lookup.PageNumber = exp.PageNumber
			lookup.GameSystemId = gs.ID

			if err := database.DB.Save(&lookup).Error; err != nil {
				return fmt.Errorf("failed to update misc lookup %s: %w", exp.Key, err)
			}
		}
	}

	return nil
}

// Note: SkillImprovementCost, WeaponSkill, Equipment, Weapon, Container, Transportation, Believe
// export/import functions follow similar patterns - implement as needed

// ExportAll exports all master data to the specified directory
func ExportAll(outputDir string) error {
	// Export in dependency order
	if err := ExportSources(outputDir); err != nil {
		return err
	}
	if err := ExportCharacterClasses(outputDir); err != nil {
		return err
	}
	if err := ExportSkillCategories(outputDir); err != nil {
		return err
	}
	if err := ExportSkillDifficulties(outputDir); err != nil {
		return err
	}
	if err := ExportSpellSchools(outputDir); err != nil {
		return err
	}
	if err := ExportSkills(outputDir); err != nil {
		return err
	}
	if err := ExportSkillCategoryDifficulties(outputDir); err != nil {
		return err
	}
	if err := ExportSpells(outputDir); err != nil {
		return err
	}
	if err := ExportClassCategoryEPCosts(outputDir); err != nil {
		return err
	}
	if err := ExportClassSpellSchoolEPCosts(outputDir); err != nil {
		return err
	}
	if err := ExportSpellLevelLECosts(outputDir); err != nil {
		return err
	}
	if err := ExportSkillImprovementCosts(outputDir); err != nil {
		return err
	}
	if err := ExportWeaponSkills(outputDir); err != nil {
		return err
	}
	if err := ExportWeaponSkillCategoryDifficulties(outputDir); err != nil {
		return err
	}
	if err := ExportEquipment(outputDir); err != nil {
		return err
	}
	if err := ExportWeapons(outputDir); err != nil {
		return err
	}
	if err := ExportContainers(outputDir); err != nil {
		return err
	}
	if err := ExportTransportation(outputDir); err != nil {
		return err
	}
	if err := ExportBelieves(outputDir); err != nil {
		return err
	}
	if err := ExportClassCategoryLearningPoints(outputDir); err != nil {
		return err
	}
	if err := ExportClassSpellPoints(outputDir); err != nil {
		return err
	}
	if err := ExportClassTypicalSkills(outputDir); err != nil {
		return err
	}
	if err := ExportClassTypicalSpells(outputDir); err != nil {
		return err
	}
	if err := ExportMiscLookups(outputDir); err != nil {
		return err
	}

	return nil
}

// ImportAll imports all master data from the specified directory
func ImportAll(inputDir string) error {
	// Import in dependency order
	if err := ImportSources(inputDir); err != nil {
		return err
	}
	if err := ImportCharacterClasses(inputDir); err != nil {
		return err
	}
	if err := ImportSkillCategories(inputDir); err != nil {
		return err
	}
	if err := ImportSkillDifficulties(inputDir); err != nil {
		return err
	}
	if err := ImportSpellSchools(inputDir); err != nil {
		return err
	}
	if err := ImportSkills(inputDir); err != nil {
		return err
	}
	if err := ImportSkillCategoryDifficulties(inputDir); err != nil {
		return err
	}
	if err := ImportSpells(inputDir); err != nil {
		return err
	}
	if err := ImportClassCategoryEPCosts(inputDir); err != nil {
		return err
	}
	if err := ImportClassSpellSchoolEPCosts(inputDir); err != nil {
		return err
	}
	if err := ImportSpellLevelLECosts(inputDir); err != nil {
		return err
	}
	if err := ImportSkillImprovementCosts(inputDir); err != nil {
		return err
	}
	if err := ImportWeaponSkills(inputDir); err != nil {
		return err
	}
	if err := ImportWeaponSkillCategoryDifficulties(inputDir); err != nil {
		return err
	}
	if err := ImportEquipment(inputDir); err != nil {
		return err
	}
	if err := ImportWeapons(inputDir); err != nil {
		return err
	}
	if err := ImportContainers(inputDir); err != nil {
		return err
	}
	if err := ImportTransportation(inputDir); err != nil {
		return err
	}
	if err := ImportBelieves(inputDir); err != nil {
		return err
	}
	if err := ImportClassCategoryLearningPoints(inputDir); err != nil {
		return err
	}
	if err := ImportClassSpellPoints(inputDir); err != nil {
		return err
	}
	if err := ImportClassTypicalSkills(inputDir); err != nil {
		return err
	}
	if err := ImportClassTypicalSpells(inputDir); err != nil {
		return err
	}
	if err := ImportMiscLookups(inputDir); err != nil {
		return err
	}

	return nil
}