bamort/backend/gsmaster/import_export.go

package gsmaster

import (
	"bamort/database"
	"encoding/json"
	"fmt"
	"os"

	"gorm.io/gorm/clause"
)

// ExportData represents the combined data to be exported
type exportData struct {
	Skills          []Skill          `json:"skills"`
	WeaponSkills    []WeaponSkill    `json:"weapon_skills"`
	Spells          []Spell          `json:"spells"`
	Equipments      []Equipment      `json:"equipments"`
	Weapons         []Weapon         `json:"weapons"`
	Containers      []Container      `json:"containers"`
	Transportations []Transportation `json:"transportations"`
	Believes        []Believe        `json:"believes"`
}

func Export(filePath string) error {
	var skills []Skill
	var weaponSkills []WeaponSkill
	var spells []Spell
	var equipments []Equipment
	var weapons []Weapon
	var containers []Container
	var transportations []Transportation
	var believes []Believe

	// Fetch all data from the respective tables
	if err := database.DB.Find(&skills).Error; err != nil {
		return fmt.Errorf("failed to retrieve equipment: %w", err)
	}
	if err := database.DB.Find(&weaponSkills).Error; err != nil {
		return fmt.Errorf("failed to retrieve equipment: %w", err)
	}
	if err := database.DB.Find(&spells).Error; err != nil {
		return fmt.Errorf("failed to retrieve equipment: %w", err)
	}
	if err := database.DB.Find(&equipments).Error; err != nil {
		return fmt.Errorf("failed to retrieve equipment: %w", err)
	}
	if err := database.DB.Find(&weapons).Error; err != nil {
		return fmt.Errorf("failed to retrieve equipment: %w", err)
	}
	if err := database.DB.Find(&containers).Error; err != nil {
		return fmt.Errorf("failed to retrieve equipment: %w", err)
	}
	if err := database.DB.Find(&transportations).Error; err != nil {
		return fmt.Errorf("failed to retrieve equipment: %w", err)
	}
	if err := database.DB.Find(&believes).Error; err != nil {
		return fmt.Errorf("failed to retrieve equipment: %w", err)
	}

	// Combine the data into a single structure
	exportData := exportData{
		Skills:          skills,
		WeaponSkills:    weaponSkills,
		Spells:          spells,
		Equipments:      equipments,
		Weapons:         weapons,
		Containers:      containers,
		Transportations: transportations,
		Believes:        believes,
	}

	// Create the JSON file for writing
	file, err := os.Create(filePath)
	if err != nil {
		return fmt.Errorf("failed to create JSON file: %w", err)
	}
	defer file.Close()

	// Write the combined data as JSON
	encoder := json.NewEncoder(file)
	encoder.SetIndent("", "  ") // Pretty-print the JSON
	if err := encoder.Encode(exportData); err != nil {
		return fmt.Errorf("failed to write JSON: %w", err)
	}

	fmt.Printf("Data exported to %s successfully\n", filePath)
	return nil

}

// ReimportFromJSON reads a JSON file and reimports the data into the database
func Import(filePath string) error {

	// Open the JSON file
	file, err := os.Open(filePath)
	if err != nil {
		return fmt.Errorf("failed to open JSON file: %w", err)
	}
	defer file.Close()

	// Decode the JSON file into the ExportData structure
	var data exportData
	decoder := json.NewDecoder(file)
	if err := decoder.Decode(&data); err != nil {
		return fmt.Errorf("failed to decode JSON file: %w", err)
	}

	// Save the data back to the database
	if len(data.Skills) > 0 {
		if err := database.DB.Clauses(clause.OnConflict{
			UpdateAll: true, // Update all fields if there's a conflict
		}).Create(&data.Skills).Error; err != nil {
			return fmt.Errorf("failed to reimport skills: %w", err)
		}
	}
	if len(data.WeaponSkills) > 0 {
		if err := database.DB.Clauses(clause.OnConflict{
			UpdateAll: true, // Update all fields if there's a conflict
		}).Create(&data.WeaponSkills).Error; err != nil {
			return fmt.Errorf("failed to reimport WeaponSkills: %w", err)
		}
	}
	if len(data.Spells) > 0 {
		if err := database.DB.Create(&data.Spells).Error; err != nil {
			return fmt.Errorf("failed to reimport Spells: %w", err)
		}
	}
	if len(data.Equipments) > 0 {
		if err := database.DB.Clauses(clause.OnConflict{
			UpdateAll: true, // Update all fields if there's a conflict
		}).Create(&data.Equipments).Error; err != nil {
			return fmt.Errorf("failed to reimport equipment: %w", err)
		}
	}
	if len(data.Weapons) > 0 {
		if err := database.DB.Clauses(clause.OnConflict{
			UpdateAll: true, // Update all fields if there's a conflict
		}).Create(&data.Weapons).Error; err != nil {
			return fmt.Errorf("failed to reimport Weapons: %w", err)
		}
	}
	if len(data.Containers) > 0 {
		if err := database.DB.Clauses(clause.OnConflict{
			UpdateAll: true, // Update all fields if there's a conflict
		}).Create(&data.Containers).Error; err != nil {
			return fmt.Errorf("failed to reimport Containers: %w", err)
		}
	}
	if len(data.Transportations) > 0 {
		if err := database.DB.Clauses(clause.OnConflict{
			UpdateAll: true, // Update all fields if there's a conflict
		}).Create(&data.Transportations).Error; err != nil {
			return fmt.Errorf("failed to reimport Transportations: %w", err)
		}
	}
	if len(data.Believes) > 0 {
		if err := database.DB.Clauses(clause.OnConflict{
			UpdateAll: true, // Update all fields if there's a conflict
		}).Create(&data.Believes).Error; err != nil {
			return fmt.Errorf("failed to reimport Believes: %w", err)
		}
	}

	fmt.Printf("Data imported from %s successfully\n", filePath)
	return nil

}