package notify

import (
	"net"
	"strings"
	"time"
)

var connc net.Conn

var clientSign map[string]chan string
var clientStopSign chan int

func init() {
	clientStopSign = make(chan int)
	clientSign = make(map[string]chan string)
}

// Notify 用于获取一个通知
func Notify(key string) chan string {
	if _, ok := clientSign[key]; !ok {
		ch := make(chan string, 5)
		clientSign[key] = ch
	}
	return clientSign[key]
}

func store(key, value string) {
	if _, ok := clientSign[key]; !ok {
		ch := make(chan string, 5)
		ch <- value
		clientSign[key] = ch
		return
	}
	clientSign[key] <- value
}

// NewNotifyC 用于新建一个Client端进程
func NewNotifyC(netype, value string) error {
	var err error
	connc, err = net.Dial(netype, value)
	if err != nil {
		return err
	}
	go cnotify()
	go func() {
		for {
			select {
			case <-clientStopSign:
				connc.Close()
				break
			default:
			}
			buf := make([]byte, 8192)
			n, err := connc.Read(buf)
			Queue.ParseMessage(buf[0:n], connc)
			if err != nil {
				connc.Close()
				notifychan <- 0
				go NewNotifyC(netype, value)
				break
			}
		}
	}()
	return nil
}

// Send 用于向Server端发送数据
func Send(name string) error {
	_, err := connc.Write(Queue.BuildMessage(name))
	return err
}

func cnotify() {
	for {
		select {
		case <-clientStopSign:
			break
		case <-notifychan:
			break
		default:
		}
		data, err := Queue.RestoreOne()
		if err != nil {
			time.Sleep(time.Millisecond * 20)
			continue
		}
		strs := strings.SplitN(data.Msg, "||", 2)
		if len(strs) < 2 {
			continue
		}
		go store(strs[0], strs[1])
	}
}

// ClientStop 终止client端运行
func ClientStop() {
	clientStopSign <- 0
}