//go:build integration
// +build integration

package integration

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

	"github.com/gin-gonic/gin"
	"github.com/google/uuid"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"go.uber.org/zap"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"

	"veza-backend-api/internal/api"
	"veza-backend-api/internal/config"
	"veza-backend-api/internal/core/marketplace"
	"veza-backend-api/internal/database"
	"veza-backend-api/internal/metrics"
	"veza-backend-api/internal/models"
	"veza-backend-api/internal/services"
)

// mockRefundPaymentProvider implements PaymentProvider and Refund for refund flow test
type mockRefundPaymentProvider struct {
	refundErr error
}

func (m *mockRefundPaymentProvider) CreatePayment(_ context.Context, _ int64, _ string, _ string, _ string, _ map[string]string) (string, string, error) {
	return "pay_refund_mock", "secret", nil
}

func (m *mockRefundPaymentProvider) GetPayment(_ context.Context, _ string) (string, error) {
	return "succeeded", nil
}

func (m *mockRefundPaymentProvider) Refund(_ context.Context, _ string, _ *int64, _ string) error {
	return m.refundErr
}

func setupRefundFlowRouter(t *testing.T, db *gorm.DB, marketService *marketplace.Service) *gin.Engine {
	t.Helper()
	os.Setenv("ENABLE_CLAMAV", "false")
	os.Setenv("CLAMAV_REQUIRED", "false")

	gin.SetMode(gin.TestMode)
	router := gin.New()

	sqlDB, err := db.DB()
	require.NoError(t, err)

	vezaDB := &database.Database{
		DB:     sqlDB,
		GormDB: db,
		Logger: zap.NewNop(),
	}

	cfg := &config.Config{
		HyperswitchWebhookSecret:   "test-secret",
		JWTSecret:                 "test-jwt-secret-key-minimum-32-characters-long",
		JWTIssuer:                 "veza-api",
		JWTAudience:               "veza-app",
		Logger:                    zap.NewNop(),
		RedisClient:               nil,
		ErrorMetrics:              metrics.NewErrorMetrics(),
		UploadDir:                 "uploads/test",
		Env:                       "development",
		Database:                  vezaDB,
		CORSOrigins:               []string{"*"},
		HandlerTimeout:            30 * time.Second,
		RateLimitLimit:            100,
		RateLimitWindow:           60,
		AuthRateLimitLoginAttempts: 10,
		AuthRateLimitLoginWindow:  15,
		MarketplaceServiceOverride: marketService,
		AuthMiddlewareOverride:    &testAuthMiddleware{},
	}
	require.NoError(t, cfg.InitServicesForTest())
	require.NoError(t, cfg.InitMiddlewaresForTest())

	apiRouter := api.NewAPIRouter(vezaDB, cfg)
	require.NoError(t, apiRouter.Setup(router))
	return router
}

// TestRefundFlow_CompletedOrder_Refund_RevokesLicense verifies: order completed -> refund request ->
// order status refunded, licence revoked.
func TestRefundFlow_CompletedOrder_Refund_RevokesLicense(t *testing.T) {
	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
	require.NoError(t, err)
	require.NoError(t, db.AutoMigrate(
		&models.User{},
		&models.Track{},
		&marketplace.Product{},
		&marketplace.Order{},
		&marketplace.OrderItem{},
		&marketplace.License{},
		&marketplace.SellerTransfer{},
	))

	buyerID := uuid.New()
	sellerID := uuid.New()
	trackID := uuid.New()
	productID := uuid.New()
	orderID := uuid.New()

	require.NoError(t, db.Create(&models.User{ID: buyerID}).Error)
	require.NoError(t, db.Create(&models.User{ID: sellerID}).Error)
	require.NoError(t, db.Create(&models.Track{ID: trackID, UserID: sellerID, FilePath: "/t.mp3"}).Error)
	require.NoError(t, db.Create(&marketplace.Product{
		ID:          productID,
		SellerID:    sellerID,
		Title:       "Test Product",
		Price:       9.99,
		ProductType: "track",
		TrackID:     &trackID,
		Status:      marketplace.ProductStatusActive,
	}).Error)
	require.NoError(t, db.Create(&marketplace.Order{
		ID:                   orderID,
		BuyerID:              buyerID,
		TotalAmount:          9.99,
		Currency:             "EUR",
		Status:               "completed",
		HyperswitchPaymentID: "pay_refund_mock",
	}).Error)
	require.NoError(t, db.Create(&marketplace.OrderItem{
		ID:        uuid.New(),
		OrderID:   orderID,
		ProductID: productID,
		Price:     9.99,
	}).Error)
	require.NoError(t, db.Create(&marketplace.License{
		ID:        uuid.New(),
		BuyerID:   buyerID,
		TrackID:   trackID,
		ProductID: productID,
		OrderID:   orderID,
		Type:      marketplace.LicenseBasic,
	}).Error)

	mockPay := &mockRefundPaymentProvider{}
	storageService := services.NewTrackStorageService("uploads/test", false, zap.NewNop())
	marketService := marketplace.NewService(db, zap.NewNop(), storageService, marketplace.WithPaymentProvider(mockPay))

	router := setupRefundFlowRouter(t, db, marketService)

	body, _ := json.Marshal(map[string]string{"reason": "Customer request"})
	req := httptest.NewRequest(http.MethodPost, "/api/v1/marketplace/orders/"+orderID.String()+"/refund", bytes.NewReader(body))
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("X-User-ID", buyerID.String())
	w := httptest.NewRecorder()
	router.ServeHTTP(w, req)

	assert.Equal(t, http.StatusOK, w.Code, "refund must succeed: %s", w.Body.String())

	var order marketplace.Order
	require.NoError(t, db.First(&order, orderID).Error)
	assert.Equal(t, "refunded", order.Status)

	var licenses []marketplace.License
	require.NoError(t, db.Where("order_id = ?", orderID).Find(&licenses).Error)
	require.Len(t, licenses, 1)
	assert.NotNil(t, licenses[0].RevokedAt, "license must be revoked")
}