package httpserver

import (
	"context"
	"fmt"
	"log/slog"
	"net/http"
	"os"
	"os/signal"
	"strings"
	"time"
)

import (
	"github.com/gin-gonic/gin"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
)

import (
	"resource-server/common"
	"resource-server/logger"
	"resource-server/models"
	"resource-server/router"
	_ "resource-server/service"
)

var (
	configFolder string
	port         int
	mode         string
	StartCmd     = &cobra.Command{
		Use:          "run",
		Short:        "Start API server",
		Example:      "resource-server run -c config/config.toml",
		SilenceUsage: true,
		PreRun: func(cmd *cobra.Command, args []string) {
			setup()
		},
		RunE: func(cmd *cobra.Command, args []string) error {
			return run()
		},
	}
)

func init() {
	StartCmd.Flags().StringVarP(&configFolder, "config", "c", "config/", "Start server with provided configuration folder")
	StartCmd.Flags().IntVarP(&port, "port", "p", 8000, "Tcp port server listening on")
	StartCmd.Flags().StringVarP(&mode, "mode", "m", "debug", "server mode ; eg:debug,test,release")
	viper.BindPFlag("port", StartCmd.Flags().Lookup("port"))
	viper.BindPFlag("mode", StartCmd.Flags().Lookup("mode"))
}

func setup() {
	if strings.HasSuffix(configFolder, "/") {
		configFolder = configFolder[:len(configFolder)-1]
		if strings.HasSuffix(configFolder, "/") {
			panic("invalid config folder")
		}
	}
	configToml := configFolder + "/config.toml"
	//1. 读取配置
	common.SetupConfig(configToml)
	//2. 设置日志
	logger.SetupLogger(true)
	//3. 初始化gorm
	models.SetupGorm(true)

	slog.Info(`starting api server`, "pid", os.Getpid())
}

func run() error {
	gin.SetMode(common.ApplicationConfig.Mode)
	r := router.InitRouter()

	srv := &http.Server{
		Addr:    common.ApplicationConfig.Addr(),
		Handler: r,
	}

	go func() {
		// 服务连接
		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
			slog.Error("listen: ", err)
			panic("http server closed")
		}
	}()

	slog.Info("module: " + common.Module)
	slog.Info("desc: " + common.Desc)
	slog.Info("version: " + common.Version)
	slog.Info("build: " + common.Build)
	slog.Info(fmt.Sprintf("Server run at: %s", common.Now()))
	slog.Info(fmt.Sprintf("-  Network: http://%s:%d/ \n", common.ApplicationConfig.Host, common.ApplicationConfig.Port))
	slog.Info("Enter Control + C Shutdown Server \n")

	// 等待中断信号以优雅地关闭服务器（设置 5 秒的超时时间）
	quit := make(chan os.Signal)
	signal.Notify(quit, os.Interrupt)
	<-quit
	fmt.Printf("%s Shutdown Server ... \n", common.Now())

	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	defer cancel()
	if err := srv.Shutdown(ctx); err != nil {
		slog.Error("Server Shutdown:", "err", err)
	}
	slog.Info("Server exiting")
	logger.ShutdownLogger()
	return nil
}