package character

import (
	"bytes"
	"encoding/json"
	"fmt"
	"net/http"
	"net/http/httptest"
	"os"
	"testing"

	"bamort/database"
	"bamort/bmrt/models"

	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func setupCRUDTestEnv(t *testing.T) {
	t.Helper()
	original := os.Getenv("ENVIRONMENT")
	os.Setenv("ENVIRONMENT", "test")
	t.Cleanup(func() {
		if original != "" {
			os.Setenv("ENVIRONMENT", original)
		} else {
			os.Unsetenv("ENVIRONMENT")
		}
	})
	database.SetupTestDB(true, true)
	t.Cleanup(database.ResetTestDB)
	err := models.MigrateStructure()
	require.NoError(t, err)
	gin.SetMode(gin.TestMode)
}

func TestCreateCharacter(t *testing.T) {
	setupCRUDTestEnv(t)

	char := map[string]interface{}{
		"name":   "Test Krieger",
		"rasse":  "Mensch",
		"typ":    "Kr",
		"userID": 4,
	}
	body, _ := json.Marshal(char)

	w := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(w)
	c.Set("userID", uint(4))
	c.Request = httptest.NewRequest(http.MethodPost, "/api/characters", bytes.NewBuffer(body))
	c.Request.Header.Set("Content-Type", "application/json")

	CreateCharacter(c)

	assert.Equal(t, http.StatusCreated, w.Code)
	var resp models.Char
	err := json.Unmarshal(w.Body.Bytes(), &resp)
	assert.NoError(t, err)
	assert.Equal(t, "Test Krieger", resp.Name)
}

func TestCreateCharacterInvalidJSON(t *testing.T) {
	setupCRUDTestEnv(t)

	w := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(w)
	c.Set("userID", uint(4))
	c.Request = httptest.NewRequest(http.MethodPost, "/api/characters", bytes.NewBufferString("invalid json"))
	c.Request.Header.Set("Content-Type", "application/json")

	CreateCharacter(c)

	assert.Equal(t, http.StatusBadRequest, w.Code)
}

func TestGetCharacter(t *testing.T) {
	setupCRUDTestEnv(t)

	// Create a character to retrieve
	char := &models.Char{
		BamortBase: models.BamortBase{Name: "Fanjo Test"},
		UserID:     4,
		Rasse:      "Mensch",
		Typ:        "Kr",
	}
	require.NoError(t, database.DB.Create(char).Error)

	w := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(w)
	c.Set("userID", uint(4))
	c.Params = gin.Params{{Key: "id", Value: fmt.Sprintf("%d", char.ID)}}

	GetCharacter(c)

	assert.Equal(t, http.StatusOK, w.Code)
	var resp models.FeChar
	err := json.Unmarshal(w.Body.Bytes(), &resp)
	assert.NoError(t, err)
	assert.Equal(t, "Fanjo Test", resp.Name)
}

func TestGetCharacterNotFound(t *testing.T) {
	setupCRUDTestEnv(t)

	w := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(w)
	c.Set("userID", uint(4))
	c.Params = gin.Params{{Key: "id", Value: "99999"}}

	GetCharacter(c)

	assert.Equal(t, http.StatusInternalServerError, w.Code)
}

func TestUpdateCharacter(t *testing.T) {
	setupCRUDTestEnv(t)

	// Create a character to update
	char := &models.Char{
		BamortBase: models.BamortBase{Name: "Original Name"},
		UserID:     4,
		Rasse:      "Mensch",
		Typ:        "Kr",
	}
	require.NoError(t, database.DB.Create(char).Error)

	updateData := map[string]interface{}{
		"name":   "Updated Name",
		"rasse":  "Elb",
		"typ":    "Kr",
		"userID": 4,
	}
	body, _ := json.Marshal(updateData)

	w := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(w)
	c.Set("userID", uint(4))
	c.Params = gin.Params{{Key: "id", Value: fmt.Sprintf("%d", char.ID)}}
	c.Request = httptest.NewRequest(http.MethodPut, "/api/characters/"+fmt.Sprintf("%d", char.ID), bytes.NewBuffer(body))
	c.Request.Header.Set("Content-Type", "application/json")

	UpdateCharacter(c)

	assert.Equal(t, http.StatusOK, w.Code)
}

func TestUpdateCharacterNotOwner(t *testing.T) {
	setupCRUDTestEnv(t)

	// Create a character owned by user 4
	char := &models.Char{
		BamortBase: models.BamortBase{Name: "Other User Char"},
		UserID:     4,
		Rasse:      "Mensch",
		Typ:        "Kr",
	}
	require.NoError(t, database.DB.Create(char).Error)

	updateData := map[string]interface{}{"name": "Hacked Name"}
	body, _ := json.Marshal(updateData)

	w := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(w)
	c.Set("userID", uint(99)) // Different user
	c.Params = gin.Params{{Key: "id", Value: fmt.Sprintf("%d", char.ID)}}
	c.Request = httptest.NewRequest(http.MethodPut, "/api/characters/"+fmt.Sprintf("%d", char.ID), bytes.NewBuffer(body))
	c.Request.Header.Set("Content-Type", "application/json")

	UpdateCharacter(c)

	assert.Equal(t, http.StatusForbidden, w.Code)
}

func TestDeleteCharacter(t *testing.T) {
	setupCRUDTestEnv(t)

	// Create a character to delete
	char := &models.Char{
		BamortBase: models.BamortBase{Name: "To Delete"},
		UserID:     4,
		Rasse:      "Mensch",
		Typ:        "Kr",
	}
	require.NoError(t, database.DB.Create(char).Error)

	w := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(w)
	c.Set("userID", uint(4))
	c.Params = gin.Params{{Key: "id", Value: fmt.Sprintf("%d", char.ID)}}

	DeleteCharacter(c)

	assert.Equal(t, http.StatusOK, w.Code)
	assert.Contains(t, w.Body.String(), "deleted successfully")

	// Verify character is actually deleted
	var count int64
	database.DB.Model(&models.Char{}).Where("id = ?", char.ID).Count(&count)
	assert.Equal(t, int64(0), count)
}

func TestDeleteCharacterNotOwner(t *testing.T) {
	setupCRUDTestEnv(t)

	char := &models.Char{
		BamortBase: models.BamortBase{Name: "Protected"},
		UserID:     4,
		Rasse:      "Mensch",
		Typ:        "Kr",
	}
	require.NoError(t, database.DB.Create(char).Error)

	w := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(w)
	c.Set("userID", uint(99))
	c.Params = gin.Params{{Key: "id", Value: fmt.Sprintf("%d", char.ID)}}

	DeleteCharacter(c)

	assert.Equal(t, http.StatusForbidden, w.Code)
}

func TestDeleteCharacterNotFound(t *testing.T) {
	setupCRUDTestEnv(t)

	w := httptest.NewRecorder()
	c, _ := gin.CreateTestContext(w)
	c.Set("userID", uint(4))
	c.Params = gin.Params{{Key: "id", Value: "99999"}}

	DeleteCharacter(c)

	assert.Equal(t, http.StatusNotFound, w.Code)
}