package main

import (
	"encoding/json"
	"flag"
	"fmt"
	"github.com/gobuffalo/packr"
	"io"
	"log"
	"math/rand"
	"net/http"
	"os"
	"os/signal"
	"time"
)

func main() {
	Logger = log.New(io.Writer(os.Stdout), "", log.Lshortfile|log.LstdFlags)
	rand.Seed(time.Now().Unix())
	var port string
	var address string
	flag.StringVar(&port, "port", "1443", "serve port")
	flag.StringVar(&address, "listen", "", "listen address")
	flag.StringVar(&configPath, "config", "config.conf", "config path")
	flag.Parse()

	fastLinkService = new(FastLinkService)
	ReadConfig()

	c := make(chan os.Signal)
	signal.Notify(c, os.Interrupt, os.Kill)
	go func() {
		<-c //阻塞直至有信号传入
		Logger.Println("Saving config")
		SaveConfig()
		Logger.Println("Save config done,exit now.")
		os.Exit(0)
	}()

	go func() {
		ticker := time.NewTicker(time.Minute)
		for range ticker.C {
			<-ticker.C
			fastLinkService.KillAloneSignalSession()
			fastLinkService.KillExpiredToken()
			SaveConfig()
			Logger.Println("Saving config")
			ticker.Reset(time.Minute)
		}
	}()

	http.HandleFunc("/admin/config", configHandler)
	http.HandleFunc("/admin/addUser", addUserHandler)
	http.HandleFunc("/admin/editUser", editUserHandler)
	http.HandleFunc("/admin/removeUser", removeUserHandler)
	http.HandleFunc("/admin/kickUser", kickUserHandler)
	http.HandleFunc("/admin/removeDevice", removeDeviceHandler)
	http.HandleFunc("/admin/removeCustomName", removeCustomNameHandler)
	http.HandleFunc("/socket.io/", socketHandler)
	http.HandleFunc("/fastLink/shareUrl/connect/check", checkHandler)
	http.HandleFunc("/fastLink/device/deviceVerificationType", deviceVerificationTypeHandler)
	http.HandleFunc("/fastLink/config/idTransfer", idTransferHandler)
	http.HandleFunc("/fastLink/stream/record/close", closeHandler)
	http.HandleFunc("/fastLink/user/loginForApp", loginForAppHandler)
	http.HandleFunc("/fastLink/device/list", appListDeviceHandler)
	http.HandleFunc("/fastLink/user/logout", logoutHandler)
	http.HandleFunc("/fastLink/user/register", registerHandler)
	http.HandleFunc("/fastLink/code/send", sendCodeHandler)

	box := packr.NewBox("web")
	http.Handle("/", http.FileServer(box))

	err := http.ListenAndServeTLS(address+":"+port, "cert.crt", "private.key", nil)
	//套nginx或Caddy可直接使用Http
	//err := http.ListenAndServe(address+":"+port, nil)
	if err != nil {
		fmt.Print(err)
	}
}

func socketHandler(w http.ResponseWriter, r *http.Request) {
	clientType := r.FormValue("clientType")

	if clientType == CLIENT_TYPE_CPP || clientType == CLIENT_TYPE_WEB {
		signalHandler(w, r)
	} else {
		serviceHandler(w, r)
	}
}

func configHandler(w http.ResponseWriter, r *http.Request) {
	marshal, _ := json.Marshal(fastLinkService)
	w.Write(marshal)
}

func addUserHandler(w http.ResponseWriter, r *http.Request) {
	user := r.FormValue("user")
	pass := r.FormValue("pass")
	if user == "" {
		w.Write([]byte("user is empty"))
		return
	}
	if pass == "" {
		w.Write([]byte("pass is empty"))
		return
	}
	exist := fastLinkService.CheckUserExist(user)
	if exist {
		w.Write([]byte("user exist"))
		return
	}
	fastLinkService.AddUser(user, pass)
	w.Write([]byte("success"))
}

func editUserHandler(w http.ResponseWriter, r *http.Request) {
	user := r.FormValue("user")
	pass := r.FormValue("pass")
	if user == "" {
		w.Write([]byte("user is empty"))
		return
	}
	if pass == "" {
		w.Write([]byte("pass is empty"))
		return
	}
	exist := fastLinkService.CheckUserExist(user)
	if !exist {
		w.Write([]byte("user not exist"))
		return
	}
	fastLinkService.EditUser(user, pass)
	w.Write([]byte("success"))
}

func removeUserHandler(w http.ResponseWriter, r *http.Request) {
	user := r.FormValue("user")
	if user == "" {
		w.Write([]byte("user is empty"))
		return
	}
	fastLinkService.removeUser(user)
	fastLinkService.removeDevicesByUser(user)
	fastLinkService.removeTokenByUser(user)
	w.Write([]byte("success"))
}

func kickUserHandler(w http.ResponseWriter, r *http.Request) {
	user := r.FormValue("user")
	if user == "" {
		w.Write([]byte("user is empty"))
		return
	}
	fastLinkService.removeTokenByUser(user)
	w.Write([]byte("success"))
}

func removeDeviceHandler(w http.ResponseWriter, r *http.Request) {
	deviceNo := r.FormValue("deviceNo")
	if deviceNo == "" {
		w.Write([]byte("deviceNo is empty"))
		return
	}
	device := fastLinkService.GetDeviceByNo(deviceNo)
	if device != nil {
		user := device.BelongUser
		fastLinkService.removeDevice(deviceNo)
		if user != "" {
			notifyDeviceChange(user)
		}
	}
	w.Write([]byte("success"))
}

func removeCustomNameHandler(w http.ResponseWriter, r *http.Request) {
	deviceNo := r.FormValue("deviceNo")
	if deviceNo == "" {
		w.Write([]byte("deviceNo is empty"))
		return
	}
	device := fastLinkService.GetDeviceByNo(deviceNo)
	if device != nil {
		device.CustomName = ""
		if device.BelongUser != "" {
			notifyDeviceChange(device.BelongUser)
		}
	}
	w.Write([]byte("success"))
}