package main

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

	"lokideploy/config"
	"lokideploy/repository"
	"lokideploy/routers"
	"lokideploy/seed"
)

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

	log.Println("Initializing database...")
	if err := repository.InitDB(); err != nil {
		log.Fatalf("Failed to init DB: %v", err)
	}

	log.Println("Seeding default data...")
	seed.Seed()

	r := routers.SetupRouter()
	srv := &http.Server{
		Addr:         ":" + cfg.ServerPort,
		Handler:      r,
		ReadTimeout:  30 * time.Second,
		WriteTimeout: 30 * time.Second,
		IdleTimeout:  120 * time.Second,
	}

	// 监听中断/终止信号，实现优雅关停：先停 HTTP（拒绝新请求、处理完在途请求），
	// 再 flush 数据库，避免防抖/异步保存丢失最近写入。
	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
	defer stop()

	go func() {
		log.Printf("LokiDeploy starting on port %s", cfg.ServerPort)
		log.Printf("API: http://localhost:%s/api/v1", cfg.ServerPort)
		log.Printf("Default login: admin / admin123")
		if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
			log.Fatalf("Server failed: %v", err)
		}
	}()

	<-ctx.Done()
	log.Println("Shutdown signal received, draining connections...")

	shutdownCtx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
	defer cancel()
	if err := srv.Shutdown(shutdownCtx); err != nil {
		log.Printf("HTTP shutdown error: %v", err)
	}

	log.Println("Flushing database...")
	if err := repository.Shutdown(); err != nil {
		log.Printf("DB shutdown error: %v", err)
	}
	log.Println("LokiDeploy stopped")
}