package main

import (
	_ "fmt"
	"fts/config"
	"fts/websocket"
	"github.com/fsnotify/fsnotify"
	_ "github.com/ipfs/go-ipfs-api"
	"io"
	"log"
	"net/http"
	"os"
	_ "os"
	"path/filepath"
	"strconv"
	"strings"
	_ "strings"
	"time"
)



func main() {

	config.InitConfig()

	//日志设置
	_,err := os.Stat(config.LocalWorkSpaceDir)
	if err != nil {
		//创建文件目录
		os.MkdirAll(config.LocalWorkSpaceDir, os.ModePerm)
	}
	time.Now().Month().String()
	logpath :=config.LocalWorkSpaceDir+"\\"+"fts_"+strconv.Itoa(time.Now().Year())+time.Now().Month().String()+".log"
	logFile, err := os.OpenFile(logpath, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0644)
	if err != nil {
		log.Printf("open log file failed, err:", err)
		return
	}
	multiWriter := io.MultiWriter(os.Stdout,logFile)
	log.SetOutput(multiWriter)
	log.SetPrefix("[fts] ")
	log.SetFlags(log.Ldate | log.Ltime | log.Lshortfile)

	//handle.InitLocalWorkSpace(nil,"324523676458291200","11.4")
	//文件监控
	config.GobalWatch, err = fsnotify.NewWatcher()
	if err != nil {
		log.Println(err)
	}

	go func() {
		for {
			select {
			case ev := <-config.GobalWatch.Events:
				{
					//log.Println(ev.Op.String()+":"+ev.Name)
					if filepath.Ext(ev.Name)==".commit"{
						continue
					}
					if strings.Index(ev.Name,"历史版本查看")>0{
						continue
					}

					if ev.Op&fsnotify.Create == fsnotify.Create {
						//fmt.Println("创建文件 : ", ev.Name);
						//这里获取新创建文件的信息，如果是目录，则加入监控中
						fi, err := os.Stat(ev.Name);
						if err == nil && fi.IsDir() {
							config.GobalWatch.Add(ev.Name);
							//fmt.Println("添加监控 : ", ev.Name);
						}else{
							filePath :=ev.Name
							abs := strings.Replace(filePath,config.LocalWorkSpaceDir,"",1)
							param :=strings.Split(abs,"\\")
							key :=config.LocalWorkSpaceDir+param[0]+"\\"+param[1]
							//log.Println("chan-->"+key)
							ch :=config.GobalWatchChannelMap[key]
							if ch==nil{
								continue
							}
							//log.Println("chan-->"+("create"+";"+ev.Name))
							ch <- ("create"+";"+ev.Name)

						}
					}
					if ev.Op&fsnotify.Write == fsnotify.Write {
						//fmt.Println("写入文件 : ", ev.Name);
						//判断文件，发送事件
						fi, err := os.Stat(ev.Name);
						if err == nil && !fi.IsDir() {
							filePath :=ev.Name
							abs := strings.Replace(filePath,config.LocalWorkSpaceDir,"",1)
							param :=strings.Split(abs,"\\")
							key :=config.LocalWorkSpaceDir+param[0]+"\\"+param[1]
							//log.Println("chan-->"+key)
							ch :=config.GobalWatchChannelMap[key]
							if ch==nil{
								continue
							}
							//log.Println("chan-->"+("write"+";"+ev.Name))
							//log.Println(ch)
							ch <- ("write"+";"+ev.Name)
						}
					}
					if ev.Op&fsnotify.Remove == fsnotify.Remove {
						//fmt.Println("删除文件 : ", ev.Name);
						//如果删除文件是目录，则移除监控
						fi, err := os.Stat(ev.Name);
						if err == nil && fi.IsDir() {
							config.GobalWatch.Remove(ev.Name);
							//fmt.Println("删除监控 : ", ev.Name);
						}else{
							filePath :=ev.Name
							abs := strings.Replace(filePath,config.LocalWorkSpaceDir,"",1)
							param :=strings.Split(abs,"\\")
							key :=config.LocalWorkSpaceDir+param[0]+"\\"+param[1]
							ch :=config.GobalWatchChannelMap[key]
							if ch==nil{
								continue
							}
							//log.Println("chan-->"+("remove"+";"+ev.Name))
							ch <- ("remove"+";"+ev.Name)
						}
					}
					if ev.Op&fsnotify.Rename == fsnotify.Rename {
						//fmt.Println("重命名文件 : ", ev.Name);
						//如果重命名文件是目录，则移除监控
						//注意这里无法使用os.Stat来判断是否是目录了
						//因为重命名后，go已经无法找到原文件来获取信息了
						//所以这里就简单粗爆的直接remove好了
						config.GobalWatch.Remove(ev.Name);
					}
					if ev.Op&fsnotify.Chmod == fsnotify.Chmod {
						//fmt.Println("修改权限 : ", ev.Name);
					}
				}
			case err := <-config.GobalWatch.Errors:
				{
					log.Printf("error : %v", err);
					return;
				}
			}
		}
	}();

	defer config.GobalWatch.Close()

	go func() {
		//客户端心跳检测
		log.Println("keeplive")
		time.Sleep(20*time.Second)
		var keepliveTimeOut int64 =5 //20s
		var lastAccept int64 = time.Now().Unix() //秒时间戳
		for true{
			//log.Print(!websocket.IsKeeplive)
			//log.Println((time.Now().Unix()-lastAccept)>keepliveTimeOut)
			if !websocket.IsKeeplive {
				if (time.Now().Unix()-lastAccept)>keepliveTimeOut{
					log.Println("长时间未检测到心跳 Exit")
					os.Exit(1)
				}
				continue
			}

			lastAccept = time.Now().Unix()
			websocket.IsKeeplive = false
			//time.Sleep(100*time.Millisecond)
		}
	}()

	//http://localhost:7777/ws
	http.HandleFunc("/upload", websocket.UploadHandler)
	http.HandleFunc("/subscriptionFileChange", websocket.SubscriptionFileChangeHandler)
	http.HandleFunc("/download", websocket.DownloadHandler)
	http.HandleFunc("/init", websocket.InitLocalWorkSpaceHandler)
	http.HandleFunc("/getFolderFileInfo", websocket.GetFolderFileInfoHandler)
	http.HandleFunc("/openFileWith", websocket.OpenFileWithHandler)
	http.HandleFunc("/checkForUpdates", websocket.CheckForUpdatesHandler)
	http.HandleFunc("/initClientConfig", websocket.InitClientConfigHandler)
	//http.HandleFunc("/watchFile", websocket.WatchFileHandler)
	http.HandleFunc("/keeplive", websocket.KeepliveHandler)
	http.HandleFunc("/messageNotify", websocket.MessageNotifyHandler)
	http.HandleFunc("/messageMarkRead", websocket.MessageMarkReadHandler)

	//TODO 消息已读

	http.HandleFunc("/queryCommitHistory", websocket.QueryCommitHistoryHandler)
	http.HandleFunc("/editCommitHistoryMilestone", websocket.EditCommitHistoryMilestoneHandler)

	//服务端启动
	log.Println("服务启动成功，监听端口7777，等待连接。")
	http.ListenAndServe("0.0.0.0:7777", nil)

}