//go:build integration
// +build integration

package integration

import (
	"bytes"
	"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"
)

func setupWebhookIdempotencyRouter(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-at-least-32-chars-long",
		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,
	}
	require.NoError(t, cfg.InitServicesForTest())
	require.NoError(t, cfg.InitMiddlewaresForTest())

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

// TestWebhookIdempotency_ThreeIdenticalWebhooks_CreatesOneOrder verifies that sending
// the same payment_succeeded webhook 3 times results in 1 completed order and 1 license.
func TestWebhookIdempotency_ThreeIdenticalWebhooks_CreatesOneOrder(t *testing.T) {
	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
	require.NoError(t, err)
	// Ensure single connection for sqlite :memory: (each new connection gets empty DB)
	sqlDB, _ := db.DB()
	sqlDB.SetMaxOpenConns(1)
	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()

	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: "/test.mp3"}).Error)

	product := &marketplace.Product{
		ID:          uuid.New(),
		SellerID:    sellerID,
		Title:       "Test Product",
		Price:       9.99,
		ProductType: "track",
		TrackID:     &trackID,
		Status:      marketplace.ProductStatusActive,
	}
	require.NoError(t, db.Create(product).Error)

	order := &marketplace.Order{
		ID:                   uuid.New(),
		BuyerID:              buyerID,
		TotalAmount:          9.99,
		Currency:             "EUR",
		Status:               "pending",
		HyperswitchPaymentID: "pay_idem_123",
	}
	require.NoError(t, db.Create(order).Error)
	require.NoError(t, db.Create(&marketplace.OrderItem{
		ID:        uuid.New(),
		OrderID:   order.ID,
		ProductID: product.ID,
		Price:     9.99,
	}).Error)

	storageService := services.NewTrackStorageService("uploads/test", false, zap.NewNop())
	marketService := marketplace.NewService(db, zap.NewNop(), storageService)

	router := setupWebhookIdempotencyRouter(t, db, marketService)

	payload, _ := json.Marshal(map[string]string{
		"payment_id": "pay_idem_123",
		"status":     "succeeded",
	})
	signature := computeWebhookSignature(payload, "test-secret-at-least-32-chars-long")

	for i := 0; i < 3; i++ {
		req := httptest.NewRequest(http.MethodPost, "/api/v1/webhooks/hyperswitch", bytes.NewReader(payload))
		req.Header.Set("Content-Type", "application/json")
		req.Header.Set("x-webhook-signature-512", signature)
		w := httptest.NewRecorder()
		router.ServeHTTP(w, req)
		assert.Equal(t, http.StatusOK, w.Code, "webhook call %d must return 200", i+1)
	}

	var orders []marketplace.Order
	require.NoError(t, db.Where("hyperswitch_payment_id = ?", "pay_idem_123").Find(&orders).Error)
	assert.Len(t, orders, 1, "must have exactly 1 order")
	assert.Equal(t, "completed", orders[0].Status, "order must be completed")

	var licenses []marketplace.License
	require.NoError(t, db.Where("order_id = ?", order.ID).Find(&licenses).Error)
	assert.Len(t, licenses, 1, "must have exactly 1 license")
}