package main

import (
	"flag"
	"fmt"
	"log"
	"net"
	"os"
	"os/signal"
	"syscall"

	"github.com/cloudprint/cloudprint-backend/config"
	"github.com/cloudprint/cloudprint-backend/internal/grpc"
	"github.com/cloudprint/cloudprint-backend/internal/grpc/interceptor"
	"github.com/cloudprint/cloudprint-backend/internal/grpc/service"
	"github.com/cloudprint/cloudprint-backend/internal/model"
	"github.com/cloudprint/cloudprint-backend/internal/repository"
	"github.com/cloudprint/cloudprint-backend/internal/service"
	"github.com/cloudprint/cloudprint-backend/pkg/jwt"
	"github.com/cloudprint/cloudprint-backend/pkg/pay"
	"github.com/cloudprint/cloudprint-backend/pkg/upload"
	pb "github.com/cloudprint/cloudprint-backend/proto/generated"
	"go.uber.org/zap"
	"google.golang.org/grpc"
	"gorm.io/driver/mysql"
	"gorm.io/gorm"
	"gorm.io/gorm/logger"
)

func main() {
	configPath := flag.String("config", "config.yaml", "path to config file")
	flag.Parse()

	// Load configuration
	cfg, err := config.LoadConfig(*configPath)
	if err != nil {
		log.Fatalf("Failed to load config: %v", err)
	}

	// Initialize logger
	zapLogger, _ := zap.NewProduction()
	defer zapLogger.Sync()

	// Initialize database
	db, err := initDB(cfg)
	if err != nil {
		log.Fatalf("Failed to initialize database: %v", err)
	}

	// Auto migrate
	if err := db.AutoMigrate(
		&model.User{},
		&model.Admin{},
		&model.Printer{},
		&model.Order{},
		&model.OrderItem{},
		&model.File{},
		&model.LibraryCategory{},
		&model.LibraryFile{},
		&model.PrintJob{},
		&model.PriceList{},
		&model.Payment{},
	); err != nil {
		log.Fatalf("Failed to migrate database: %v", err)
	}

	// Initialize repositories
	userRepo := repository.NewUserRepository(db)
	adminRepo := repository.NewAdminRepository(db)
	fileRepo := repository.NewFileRepository(db)
	orderRepo := repository.NewOrderRepository(db)
	orderItemRepo := repository.NewOrderItemRepository(db)
	printerRepo := repository.NewPrinterRepository(db)
	printJobRepo := repository.NewPrintJobRepository(db)
	libraryRepo := repository.NewLibraryRepository(db)
	priceRepo := repository.NewPriceRepository(db)
	paymentRepo := repository.NewPaymentRepository(db)

	// Initialize JWT manager
	jwtManager := jwt.NewJWTManager(
		cfg.JWT.Secret,
		cfg.JWT.AccessTokenTTL,
		cfg.JWT.RefreshTokenTTL,
	)

	// Initialize file uploader
	fileUploader := upload.NewFileUploader(
		cfg.Upload.Path,
		cfg.Upload.ChunkPath,
		cfg.Upload.MaxSize,
	)

	// Initialize WeChat pay
	weChatPay := pay.NewWeChatPay(&cfg.WeChat)

	// Initialize services
	authService := service.NewAuthService(userRepo, adminRepo, jwtManager, nil, &cfg.WeChat)
	fileService := service.NewFileService(fileRepo, fileUploader, cfg.Upload.Path)
	orderService := service.NewOrderService(orderRepo, orderItemRepo, fileRepo, priceRepo, userRepo, printerRepo, printJobRepo)
	printService := service.NewPrintService(printerRepo, printJobRepo, orderRepo)

	// Initialize gRPC server
	grpcServer := grpc.NewServer(
		grpc.UnaryInterceptor(interceptor.NewAuthInterceptor(jwtManager).UnaryServerInterceptor()),
	)

	// Register gRPC services
	pb.RegisterAuthServiceServer(grpcServer, service.NewAuthServiceServer(authService))
	pb.RegisterFileServiceServer(grpcServer, service.NewFileServiceServer(fileService))
	pb.RegisterOrderServiceServer(grpcServer, service.NewOrderServiceServer(orderService))
	pb.RegisterPrintServiceServer(grpcServer, service.NewPrintServiceServer(printService))
	pb.RegisterLibraryServiceServer(grpcServer, service.NewLibraryServiceServer(libraryRepo, fileRepo))
	pb.RegisterPriceServiceServer(grpcServer, service.NewPriceServiceServer(priceRepo))
	pb.RegisterPayServiceServer(grpcServer, service.NewPayServiceServer(orderService, paymentRepo, weChatPay, userRepo))
	pb.RegisterAdminServiceServer(grpcServer, service.NewAdminServiceServer(authService, orderRepo, printerRepo))

	// Start server
	addr := fmt.Sprintf("%s:%d", cfg.Server.Host, cfg.Server.Port)
	lis, err := net.Listen("tcp", addr)
	if err != nil {
		log.Fatalf("Failed to listen: %v", err)
	}

	// Graceful shutdown
	sigCh := make(chan os.Signal, 1)
	signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)

	go func() {
		<-sigCh
		grpcServer.GracefulStop()
	}()

	zapLogger.Info("Starting gRPC server", zap.String("address", addr))
	if err := grpcServer.Serve(lis); err != nil {
		log.Fatalf("Failed to serve: %v", err)
	}
}

func initDB(cfg *config.Config) (*gorm.DB, error) {
	gormLogger := logger.New(
		log.New(os.Stdout, "\r\n", log.LstdFlags),
		logger.Config{
			LogLevel: logger.Info,
		},
	)

	db, err := gorm.Open(mysql.Open(cfg.Database.DSN()), &gorm.Config{
		Logger: gormLogger,
	})
	if err != nil {
		return nil, err
	}

	sqlDB, err := db.DB()
	if err != nil {
		return nil, err
	}

	sqlDB.SetMaxOpenConns(cfg.Database.MaxOpenConns)
	sqlDB.SetMaxIdleConns(cfg.Database.MaxIdleConns)

	return db, nil
}