package web

import (
	"context"
	"log"
	"os"
	"os/signal"
	"strconv"
	"syscall"
	"time"

	"git.ma-al.com/goc_marek/timetracker/app/config"
	"git.ma-al.com/goc_marek/timetracker/app/delivery/handler"
	"git.ma-al.com/goc_marek/timetracker/app/delivery/middleware"
	"git.ma-al.com/goc_marek/timetracker/app/delivery/web/public"

	// "github.com/gofiber/fiber/v2/middleware/filesystem"
	"github.com/gofiber/fiber/v3"
	// "github.com/gofiber/fiber/v3/middleware/filesystem"
	"github.com/gofiber/fiber/v3/middleware/logger"
	"github.com/gofiber/fiber/v3/middleware/recover"
)

// Server represents the web server
type Server struct {
	app *fiber.App
	cfg *config.Config
	api fiber.Router
}

// App returns the fiber app
func (s *Server) App() *fiber.App {
	return s.app
}

// Cfg returns the config
func (s *Server) Cfg() *config.Config {
	return s.cfg
}

// New creates a new server instance
func New() *Server {
	return &Server{
		app: fiber.New(fiber.Config{
			ErrorHandler: customErrorHandler,
		}),
		cfg: config.Get(),
	}
}

// Setup configures the server with routes and middleware
func (s *Server) Setup() error {
	// Global middleware
	s.app.Use(recover.New())
	s.app.Use(logger.New())

	// CORS middleware
	s.app.Use(middleware.CORSMiddleware())

	// Language middleware - discovers client's language and stores in context
	s.app.Use(middleware.LanguageMiddleware())

	// initialize healthcheck
	public.InitHealth(s.App(), s.Cfg())

	// serve favicon
	public.Favicon(s.app, s.cfg)

	// API routes
	s.api = s.app.Group("/api/v1")

	// initialize swagger endpoints
	public.InitSwagger(s.App())

	// Auth routes (public)
	auth := s.api.Group("/auth")
	handler.AuthHandlerRoutes(auth)

	// Repo routes (public)
	repo := s.api.Group("/repo")
	repo.Use(middleware.AuthMiddleware())
	handler.RepoHandlerRoutes(repo)

	// Protected routes example
	protected := s.api.Group("/restricted")
	protected.Use(middleware.AuthMiddleware())
	protected.Get("/dashboard", func(c fiber.Ctx) error {
		user := middleware.GetUser(c)
		return c.JSON(fiber.Map{
			"message": "Welcome to the protected area",
			"user":    user,
		})
	})

	// Admin routes example
	admin := s.api.Group("/admin")
	admin.Use(middleware.AuthMiddleware())
	admin.Use(middleware.RequireAdmin())
	admin.Get("/users", func(c fiber.Ctx) error {
		return c.JSON(fiber.Map{
			"message": "Admin area - user management",
		})
	})

	public.NewLangHandler().InitLanguage(s.api, s.cfg)

	// Settings endpoint
	public.NewSettingsHandler().InitSettings(s.api, s.cfg)

	//  keep this at the end because its wilderange
	public.InitBo(s.App())

	return nil
}

// Run starts the server
func (s *Server) Run() error {
	// Run database migrations
	// if err := db.RunMigrations(); err != nil {
	// 	log.Printf("⚠️ Database migrations failed: %v", err)
	// } else {
	// 	log.Println("✓ Database migrations completed")
	// }

	// // Seed admin user
	// if err := db.SeedAdminUser("admin@example.com", "admin123"); err != nil {
	// 	log.Printf("⚠️ Admin user seeding failed: %v", err)
	// }

	addr := s.cfg.Server.Host + ":" + strconv.Itoa(s.cfg.Server.Port)
	log.Printf("Starting server on %s", addr)
	log.Printf("Swagger UI available at http://%s/swagger/index.html", addr)
	log.Printf("OpenAPI JSON available at http://%s/openapi.json", addr)

	go func() {
		if err := s.app.Listen(":3000"); err != nil {
			log.Println("Server stopped:", err)
		}
	}()

	// Wait for shutdown signal
	quit := make(chan os.Signal, 1)

	signal.Notify(
		quit,
		syscall.SIGINT,  // Ctrl+C
		syscall.SIGTERM, // docker stop
	)

	<-quit

	log.Println("Shutting down server...")

	// graceful shutdown with timeout
	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
	defer cancel()

	if err := s.app.ShutdownWithContext(ctx); err != nil {
		log.Fatal("Shutdown error:", err)
	}

	log.Println("Server exited cleanly")
	return nil
}

// customErrorHandler handles errors
func customErrorHandler(c fiber.Ctx, err error) error {
	code := fiber.StatusInternalServerError

	if e, ok := err.(*fiber.Error); ok {
		code = e.Code
	}

	return c.Status(code).JSON(fiber.Map{
		"error": err.Error(),
	})
}