package main

import (
	"context"
	"flag"
	"fmt"
	"github.com/cloudflare/tableflip"
	"github.com/gin-gonic/gin"
	"github.com/robfig/cron/v3"
	"log"
	"net/http"
	"os"
	"os/signal"
	"runtime"
	"syscall"
	"time"
	"zhiyuan/pkg/config"
	"zhiyuan/pkg/db"
	"zhiyuan/pkg/logger"
	"zhiyuan/pkg/redis"
	"zhiyuan/pkg/sms"
	"zhiyuan/pkg/validate"
	"zhiyuan/routers"
)

func init() {
	config.Setup()
	logger.Setup()
	db.Setup()
	redis.Setup()
	validate.Setup()
	sms.Setup()
}

func main() {
	c := cron.New(cron.WithSeconds())
	c.AddFunc("0 0 0 * * *", func() {
		//logger.Sugar.Infof("Run cron")
		//worksitecheck.CheckCron()
	})
	c.Start()

	gin.SetMode(config.Cfg.Server.RunMode)
	r := routers.InitRouters()

	readTimeout := config.Cfg.Server.ReadTimeout
	writeTimeout := config.Cfg.Server.WriteTimeout
	endPoint := fmt.Sprintf(":%d", config.Cfg.Server.HttpPort)
	maxHeaderBytes := 1 << 20

	server := &http.Server{
		Addr:           endPoint,
		Handler:        r,
		ReadTimeout:    readTimeout,
		WriteTimeout:   writeTimeout,
		MaxHeaderBytes: maxHeaderBytes,
	}
	var (
		listenAddr = flag.String("listen", "localhost"+endPoint, "`Address` to listen on")
		pidFile    = flag.String("pid-file", config.Cfg.Server.PidFile, "`Path` to pid file")
	)

	flag.Parse()
	log.SetPrefix(fmt.Sprintf("%d ", os.Getpid()))

	// 1. 判断当前是否为 Windows 平台
	if runtime.GOOS == "windows" {
		startServer(r, endPoint)
	} else {
		upg, err := tableflip.New(tableflip.Options{
			PIDFile: *pidFile,
		})
		if err != nil {
			panic(err)
		}
		defer upg.Stop()

		// Do an upgrade on SIGHUP
		go func() {
			sig := make(chan os.Signal, 1)
			signal.Notify(sig, syscall.SIGHUP)
			for range sig {
				err := upg.Upgrade()
				if err != nil {
					log.Println("Upgrade failed:", err)
				}
			}
		}()

		// Listen must be called before Ready
		ln, err := upg.Listen("tcp", *listenAddr)
		if err != nil {
			log.Fatalln("Can't listen:", err)
		}
		go func() {
			err := server.Serve(ln)
			if err != http.ErrServerClosed {
				log.Println("HTTP server:", err)
			}
		}()

		log.Printf("ready listen %s", endPoint)
		if err := upg.Ready(); err != nil {
			panic(err)
		}
		//models.WorkSiteAddReturnVisit()
		<-upg.Exit()

		// Make sure to set a deadline on exiting the process
		// after upg.Exit() is closed. No new upgrades can be
		// performed if the parent doesn't exit.
		time.AfterFunc(30*time.Second, func() {
			log.Println("Graceful shutdown timed out")
			os.Exit(1)
		})

		// Wait for connections to drain.
		server.Shutdown(context.Background())
	}
}

// 标准启动方式（Windows 使用）
func startServer(router *gin.Engine, addr string) {
	server := &http.Server{
		Addr:    addr,
		Handler: router,
	}

	log.Printf("✅ 服务已启动，监听地址 %s\n", addr)
	log.Printf("👉 测试命令: curl http://localhost%s\n", addr)

	if err := server.ListenAndServe(); err != nil && err != http.ErrServerClosed {
		log.Fatalf("❌ 服务启动失败: %v\n", err)
	}
}