package main

import (
	"context"
	"fmt"
	"os"
	"os/signal"
	"syscall"
	"time"

	"git.sharkk.net/Sky/Moonshark/core/config"
	"git.sharkk.net/Sky/Moonshark/core/http"
	"git.sharkk.net/Sky/Moonshark/core/logger"
	"git.sharkk.net/Sky/Moonshark/core/routers"
	"git.sharkk.net/Sky/Moonshark/core/runner"
	"git.sharkk.net/Sky/Moonshark/core/utils"
	"git.sharkk.net/Sky/Moonshark/core/watchers"
)

// initRouters sets up the Lua and static routers
func initRouters(routesDir, staticDir string, log *logger.Logger) (*routers.LuaRouter, *routers.StaticRouter, error) {
	// Ensure directories exist
	if err := utils.EnsureDir(routesDir); err != nil {
		return nil, nil, fmt.Errorf("routes directory doesn't exist, and could not create it: %v", err)
	}
	if err := utils.EnsureDir(staticDir); err != nil {
		return nil, nil, fmt.Errorf("static directory doesn't exist, and could not create it: %v", err)
	}

	// Initialize Lua router for dynamic routes
	luaRouter, err := routers.NewLuaRouter(routesDir)
	if err != nil {
		return nil, nil, fmt.Errorf("failed to initialize Lua router: %v", err)
	}
	log.Info("Lua router initialized with routes from %s", routesDir)

	// Initialize static file router
	staticRouter, err := routers.NewStaticRouterWithLogger(staticDir, log)
	if err != nil {
		return nil, nil, fmt.Errorf("failed to initialize static router: %v", err)
	}
	log.Info("Static router initialized with files from %s", staticDir)
	staticRouter.EnableDebugLog()

	return luaRouter, staticRouter, nil
}

func main() {
	// Initialize logger
	log := logger.New(logger.LevelDebug, true)

	log.Server("Starting Moonshark server")

	// Load configuration from config.lua
	cfg, err := config.Load("config.lua")
	if err != nil {
		log.Warning("Failed to load config.lua: %v", err)
		log.Info("Using default configuration")
		cfg = config.New()
	}

	switch cfg.GetString("log_level", "info") {
	case "debug":
		log.SetLevel(logger.LevelDebug)
	case "warn":
		log.SetLevel(logger.LevelWarning)
	case "error":
		log.SetLevel(logger.LevelError)
	case "server":
		log.SetLevel(logger.LevelServer)
	case "fatal":
		log.SetLevel(logger.LevelFatal)
	default:
		log.SetLevel(logger.LevelInfo)
	}

	// Get port from config or use default
	port := cfg.GetInt("port", 3117)

	// Initialize routers
	routesDir := cfg.GetString("routes_dir", "./routes")
	staticDir := cfg.GetString("static_dir", "./static")
	luaRouter, staticRouter, err := initRouters(routesDir, staticDir, log)
	if err != nil {
		log.Fatal("Router initialization failed: %v", err)
	}

	if cfg.GetBool("watchers", true) {
		// Set up file watchers for automatic reloading
		luaWatcher, err := watchers.WatchLuaRouter(luaRouter, routesDir, log)
		if err != nil {
			log.Warning("Failed to watch routes directory: %v", err)
		} else {
			defer luaWatcher.Close()
			log.Info("File watcher active for Lua routes")
		}

		staticWatcher, err := watchers.WatchStaticRouter(staticRouter, staticDir, log)
		if err != nil {
			log.Warning("Failed to watch static directory: %v", err)
		} else {
			defer staticWatcher.Close()
			log.Info("File watcher active for static files")
		}
	}

	// Get buffer size from config or use default
	bufferSize := cfg.GetInt("buffer_size", 20)

	// Initialize Lua runner
	runner, err := runner.NewRunner(
		runner.WithBufferSize(bufferSize),
		runner.WithLibDirs("./libs"),
	)
	if err != nil {
		log.Fatal("Failed to initialize Lua runner: %v", err)
	}
	log.Server("Lua runner initialized with buffer size %d", bufferSize)
	defer runner.Close()

	// Create HTTP server
	server := http.New(luaRouter, staticRouter, runner, log)

	// Handle graceful shutdown
	stop := make(chan os.Signal, 1)
	signal.Notify(stop, os.Interrupt, syscall.SIGTERM)

	// Start server in a goroutine
	go func() {
		if err := server.ListenAndServe(fmt.Sprintf(":%d", port)); err != nil {
			if err.Error() != "http: Server closed" {
				log.Error("Server error: %v", err)
			}
		}
	}()

	log.Server("Server started on port %d", port)

	// Wait for interrupt signal
	<-stop
	log.Server("Shutdown signal received")

	// Gracefully shut down the server
	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()

	if err := server.Shutdown(ctx); err != nil {
		log.Error("Server shutdown error: %v", err)
	}

	log.Server("Server stopped")
}