package main

import (
	"context"
	"log"
	"net/http"
	"os"
	"os/signal"
	"syscall"
	"time"

	"github.com/celestia-trace/backend/config"
	"github.com/celestia-trace/backend/database"
	"github.com/celestia-trace/backend/router"
	"github.com/joho/godotenv"
)

func main() {
	// Try loading .env if it exists
	_ = godotenv.Load()

	// Load configuration
	cfg := config.Load()
	
	// Initialize database
	database.Init(cfg)

	// Setup router
	r := router.Setup(database.DB, cfg)

	srv := &http.Server{
		Addr:    ":" + cfg.ServerPort,
		Handler: r,
	}

	go func() {
		log.Printf("Server listening on port %s", cfg.ServerPort)
		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			log.Fatalf("listen: %s\n", err)
		}
	}()

	// Graceful shutdown with signal handling
	quit := make(chan os.Signal, 1)
	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
	<-quit
	log.Println("Shutting down server...")

	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()
	if err := srv.Shutdown(ctx); err != nil {
		log.Fatal("Server forced to shutdown:", err)
	}

	log.Println("Server exiting")
}