package main

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

	"github.com/edu-cloud/api-gateway/internal/config"
	"github.com/edu-cloud/api-gateway/internal/routing"
)

func main() {
	cfg := config.Load()

	r := routing.Setup(cfg)

	srv := &http.Server{
		Addr:         ":" + cfg.Port,
		Handler:      r,
		ReadTimeout:  10 * time.Second,
		WriteTimeout: 30 * time.Second,
	}

	// 优雅关闭
	go func() {
		log.Printf("API Gateway listening on :%s", cfg.Port)
		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			log.Fatalf("listen: %s\n", err)
		}
	}()

	quit := make(chan os.Signal, 1)
	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
	<-quit
	log.Println("Shutting down API Gateway...")

	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("API Gateway exited")
}