package repository

import (
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"gorm.io/gorm"

	testHelpers "nex/backend/tests"

	"nex/backend/internal/domain"
)

func setupTestDB(t *testing.T) *gorm.DB {
	t.Helper()
	return testHelpers.SetupTestDB(t)
}

// ============ ProviderRepository 测试 ============

func TestProviderRepository_Create(t *testing.T) {
	db := setupTestDB(t)
	repo := NewProviderRepository(db)

	provider := &domain.Provider{
		ID:      "test-provider",
		Name:    "Test Provider",
		APIKey:  "sk-test-key",
		BaseURL: "https://api.test.com",
		Enabled: true,
	}
	err := repo.Create(provider)
	require.NoError(t, err)
}

func TestProviderRepository_GetByID(t *testing.T) {
	db := setupTestDB(t)
	repo := NewProviderRepository(db)

	provider := &domain.Provider{
		ID: "test-provider", Name: "Test", APIKey: "sk-test-key", BaseURL: "https://api.test.com",
	}
	err := repo.Create(provider)
	require.NoError(t, err)

	result, err := repo.GetByID("test-provider")
	require.NoError(t, err)
	assert.Equal(t, "test-provider", result.ID)
	assert.Equal(t, "Test", result.Name)
}

func TestProviderRepository_GetByID_NotFound(t *testing.T) {
	db := setupTestDB(t)
	repo := NewProviderRepository(db)

	_, err := repo.GetByID("nonexistent")
	assert.Error(t, err)
}

func TestProviderRepository_List(t *testing.T) {
	db := setupTestDB(t)
	repo := NewProviderRepository(db)

	for _, id := range []string{"pA", "pB", "pC"} {
		err := repo.Create(&domain.Provider{ID: id, Name: id, APIKey: "key", BaseURL: "https://test.com"})
		require.NoError(t, err)
	}

	providers, err := repo.List()
	require.NoError(t, err)
	assert.Len(t, providers, 3)
}

func TestProviderRepository_Update(t *testing.T) {
	db := setupTestDB(t)
	repo := NewProviderRepository(db)

	require.NoError(t, repo.Create(&domain.Provider{ID: "p1", Name: "Old", APIKey: "key", BaseURL: "https://old.com"}))

	err := repo.Update("p1", map[string]interface{}{"name": "New"})
	require.NoError(t, err)

	result, _ := repo.GetByID("p1")
	assert.Equal(t, "New", result.Name)
}

func TestProviderRepository_Update_NotFound(t *testing.T) {
	db := setupTestDB(t)
	repo := NewProviderRepository(db)

	err := repo.Update("nonexistent", map[string]interface{}{"name": "New"})
	assert.Error(t, err)
}

func TestProviderRepository_Delete(t *testing.T) {
	db := setupTestDB(t)
	repo := NewProviderRepository(db)

	require.NoError(t, repo.Create(&domain.Provider{ID: "p1", Name: "Test", APIKey: "key", BaseURL: "https://test.com"}))
	err := repo.Delete("p1")
	require.NoError(t, err)

	_, err = repo.GetByID("p1")
	assert.Error(t, err)
}

func TestProviderRepository_Delete_NotFound(t *testing.T) {
	db := setupTestDB(t)
	repo := NewProviderRepository(db)

	err := repo.Delete("nonexistent")
	assert.Error(t, err)
}

// ============ ModelRepository 测试 ============

func TestModelRepository_Create(t *testing.T) {
	db := setupTestDB(t)
	providerRepo := NewProviderRepository(db)
	repo := NewModelRepository(db)

	require.NoError(t, providerRepo.Create(&domain.Provider{ID: "p1", Name: "Test", APIKey: "key", BaseURL: "https://test.com"}))
	err := repo.Create(&domain.Model{ID: "m1", ProviderID: "p1", ModelName: "gpt-4", Enabled: true})
	require.NoError(t, err)
}

func TestModelRepository_GetByID(t *testing.T) {
	db := setupTestDB(t)
	providerRepo := NewProviderRepository(db)
	repo := NewModelRepository(db)

	require.NoError(t, providerRepo.Create(&domain.Provider{ID: "p1", Name: "Test", APIKey: "key", BaseURL: "https://test.com"}))
	require.NoError(t, repo.Create(&domain.Model{ID: "m1", ProviderID: "p1", ModelName: "gpt-4", Enabled: true}))

	result, err := repo.GetByID("m1")
	require.NoError(t, err)
	assert.Equal(t, "m1", result.ID)
	assert.Equal(t, "gpt-4", result.ModelName)
}

func TestModelRepository_FindByProviderAndModelName(t *testing.T) {
	db := setupTestDB(t)
	providerRepo := NewProviderRepository(db)
	repo := NewModelRepository(db)

	require.NoError(t, providerRepo.Create(&domain.Provider{ID: "p1", Name: "Test", APIKey: "key", BaseURL: "https://test.com"}))
	require.NoError(t, repo.Create(&domain.Model{ID: "m1", ProviderID: "p1", ModelName: "gpt-4", Enabled: true}))

	result, err := repo.FindByProviderAndModelName("p1", "gpt-4")
	require.NoError(t, err)
	assert.Equal(t, "m1", result.ID)
	assert.Equal(t, "p1", result.ProviderID)
	assert.Equal(t, "gpt-4", result.ModelName)
}

func TestModelRepository_FindByProviderAndModelName_NotFound(t *testing.T) {
	db := setupTestDB(t)
	providerRepo := NewProviderRepository(db)
	repo := NewModelRepository(db)

	require.NoError(t, providerRepo.Create(&domain.Provider{ID: "p1", Name: "Test", APIKey: "key", BaseURL: "https://test.com"}))
	require.NoError(t, repo.Create(&domain.Model{ID: "m1", ProviderID: "p1", ModelName: "gpt-4", Enabled: true}))

	// Wrong provider_id
	_, err := repo.FindByProviderAndModelName("p2", "gpt-4")
	assert.Error(t, err)

	// Wrong model_name
	_, err = repo.FindByProviderAndModelName("p1", "gpt-3.5")
	assert.Error(t, err)

	// Both wrong
	_, err = repo.FindByProviderAndModelName("p2", "claude-3")
	assert.Error(t, err)
}

func TestModelRepository_List(t *testing.T) {
	db := setupTestDB(t)
	providerRepo := NewProviderRepository(db)
	repo := NewModelRepository(db)

	require.NoError(t, providerRepo.Create(&domain.Provider{ID: "p1", Name: "Test", APIKey: "key", BaseURL: "https://test.com"}))
	require.NoError(t, providerRepo.Create(&domain.Provider{ID: "p2", Name: "Test2", APIKey: "key", BaseURL: "https://test2.com"}))
	require.NoError(t, repo.Create(&domain.Model{ID: "m1", ProviderID: "p1", ModelName: "gpt-4"}))
	require.NoError(t, repo.Create(&domain.Model{ID: "m2", ProviderID: "p1", ModelName: "gpt-3.5"}))
	require.NoError(t, repo.Create(&domain.Model{ID: "m3", ProviderID: "p2", ModelName: "claude-3"}))

	all, err := repo.List("")
	require.NoError(t, err)
	assert.Len(t, all, 3)

	p1Models, err := repo.List("p1")
	require.NoError(t, err)
	assert.Len(t, p1Models, 2)
}

func TestModelRepository_ListEnabled(t *testing.T) {
	db := setupTestDB(t)
	providerRepo := NewProviderRepository(db)
	modelRepo := NewModelRepository(db)

	// Create two providers (both start enabled due to gorm:"default:true")
	err := providerRepo.Create(&domain.Provider{
		ID: "enabled-provider", Name: "Enabled Provider",
		APIKey: "key1", BaseURL: "https://enabled.com", Enabled: true,
	})
	require.NoError(t, err)
	err = providerRepo.Create(&domain.Provider{
		ID: "disabled-provider", Name: "Disabled Provider",
		APIKey: "key2", BaseURL: "https://disabled.com", Enabled: true,
	})
	require.NoError(t, err)

	// Disable the second provider via Update (GORM default:true skips zero values on Create)
	err = providerRepo.Update("disabled-provider", map[string]interface{}{"enabled": false})
	require.NoError(t, err)

	// Create models (all start enabled due to gorm:"default:true")
	err = modelRepo.Create(&domain.Model{ID: "m1", ProviderID: "enabled-provider", ModelName: "gpt-4", Enabled: true})
	require.NoError(t, err)
	err = modelRepo.Create(&domain.Model{ID: "m2", ProviderID: "enabled-provider", ModelName: "gpt-3.5", Enabled: true})
	require.NoError(t, err)
	err = modelRepo.Create(&domain.Model{ID: "m3", ProviderID: "disabled-provider", ModelName: "claude-3", Enabled: true})
	require.NoError(t, err)
	err = modelRepo.Create(&domain.Model{ID: "m4", ProviderID: "disabled-provider", ModelName: "claude-3.5", Enabled: true})
	require.NoError(t, err)

	// Disable m2 via Update
	err = modelRepo.Update("m2", map[string]interface{}{"enabled": false})
	require.NoError(t, err)

	// ListEnabled should only return models where both model and provider are enabled:
	// - m1: enabled provider + enabled model -> returned
	// - m2: enabled provider + disabled model -> filtered out
	// - m3: disabled provider + enabled model -> filtered out
	// - m4: disabled provider + enabled model -> filtered out
	enabled, err := modelRepo.ListEnabled()
	require.NoError(t, err)
	require.Len(t, enabled, 1)
	assert.Equal(t, "m1", enabled[0].ID)
	assert.Equal(t, "enabled-provider", enabled[0].ProviderID)
	assert.Equal(t, "gpt-4", enabled[0].ModelName)
}

func TestModelRepository_Update(t *testing.T) {
	db := setupTestDB(t)
	providerRepo := NewProviderRepository(db)
	repo := NewModelRepository(db)

	require.NoError(t, providerRepo.Create(&domain.Provider{ID: "p1", Name: "Test", APIKey: "key", BaseURL: "https://test.com"}))
	require.NoError(t, repo.Create(&domain.Model{ID: "m1", ProviderID: "p1", ModelName: "gpt-4", Enabled: true}))

	err := repo.Update("m1", map[string]interface{}{"enabled": false})
	require.NoError(t, err)

	result, _ := repo.GetByID("m1")
	assert.False(t, result.Enabled)
}

func TestModelRepository_Delete(t *testing.T) {
	db := setupTestDB(t)
	providerRepo := NewProviderRepository(db)
	repo := NewModelRepository(db)

	require.NoError(t, providerRepo.Create(&domain.Provider{ID: "p1", Name: "Test", APIKey: "key", BaseURL: "https://test.com"}))
	require.NoError(t, repo.Create(&domain.Model{ID: "m1", ProviderID: "p1", ModelName: "gpt-4"}))

	err := repo.Delete("m1")
	require.NoError(t, err)

	_, err = repo.GetByID("m1")
	assert.Error(t, err)
}

// ============ StatsRepository 测试 ============

func TestStatsRepository_Record(t *testing.T) {
	db := setupTestDB(t)
	repo := NewStatsRepository(db)

	err := repo.Record("provider-1", "gpt-4")
	require.NoError(t, err)

	// 再次记录应递增
	err = repo.Record("provider-1", "gpt-4")
	require.NoError(t, err)

	stats, err := repo.Query("provider-1", "", nil, nil)
	require.NoError(t, err)
	require.Len(t, stats, 1)
	assert.Equal(t, 2, stats[0].RequestCount)
}

func TestStatsRepository_Query(t *testing.T) {
	db := setupTestDB(t)
	repo := NewStatsRepository(db)

	require.NoError(t, repo.Record("p1", "gpt-4"))
	// 注意：当前 schema 只有 date 字段有唯一约束
	// 所以同一 provider + model 只能有一条记录
	stats, err := repo.Query("p1", "", nil, nil)
	require.NoError(t, err)
	assert.Len(t, stats, 1)
}

func TestModelRepository_List_EmptyResult(t *testing.T) {
	db := setupTestDB(t)
	repo := NewModelRepository(db)

	result, err := repo.List("")
	require.NoError(t, err)
	assert.NotNil(t, result)
	assert.Empty(t, result)
	assert.Len(t, result, 0)
}

func TestProviderRepository_List_EmptyResult(t *testing.T) {
	db := setupTestDB(t)
	repo := NewProviderRepository(db)

	result, err := repo.List()
	require.NoError(t, err)
	assert.NotNil(t, result)
	assert.Empty(t, result)
	assert.Len(t, result, 0)
}