package tcppool

import (
	"errors"
	"fmt"
	"net"
	"quenue/app/utils"
	"quenue/config"
	"sync"
	"sync/atomic"
	"time"
)

var (
	full       int32 = 0
	TcpFactory       = TcpHelper{Full: &full}
	lockSingle sync.Once
)

type TcpHelper struct {
	client   net.Conn
	lastTime int64
	Full     *int32
}

func (t *TcpHelper) Init(port string) *TcpHelper {
	lockSingle.Do(func() {
		var conn, err = net.DialTimeout("tcp", config.GetConf().Url+":"+port, 10*time.Second)
		if err == nil {
			t.client = conn
			atomic.StoreInt32(t.Full, 0)
			t.watch(t.client)
		} else {
			atomic.StoreInt32(t.Full, 1)
			t.reconnect(port)
			utils.Log(nil, config.GetConf().Url+":"+port)
		}
	})
	return t
}
func (t *TcpHelper) reconnect(port string) {
	var conn, err = net.DialTimeout("tcp", config.GetConf().Url+":"+port, 5*time.Second)
	if err == nil {
		utils.Log(nil, "连接下游成功")
		atomic.StoreInt32(t.Full, 0)
		t.client = conn
		t.watch(t.client)
	} else {
		utils.Log(nil, "重连下游")
		time.Sleep(1 * time.Second)
		atomic.StoreInt32(t.Full, 1)
		t.client = conn
		t.reconnect(port)
	}
}
func (t *TcpHelper) SendMsg(msg []byte) error {
	msg = append(msg, '\n')
	t = t.Init(config.GetConf().OrderPort)
	if t.client == nil {
		return errors.New("客户端连接失败")
	}
	var start = time.Now().Unix()
	var clinet = t.Init(config.GetConf().OrderPort).client
	clinet.SetReadDeadline(time.Now().Add(time.Second * 5))
	_, err := clinet.Write(msg)
	var end = time.Now().Unix()
	fmt.Println(end-start, "秒")
	var buffer [1]byte
	// 持续读取数据
	n, err := t.client.Read(buffer[:])
	if err == nil {
		if n > 0 {
			recvStr := string(buffer[:n])
			fmt.Println("结果：recvStr:", recvStr)
			if recvStr == "1" {
				fmt.Println("客户端繁忙")
				atomic.StoreInt32(t.Full, 1)
			} else if recvStr == "2" {
				fmt.Println("客户端空闲")
				atomic.StoreInt32(t.Full, 0)
			}
		}
	}
	return err
}
func (t *TcpHelper) Close(conn net.Conn) {
	t.client.Close()
}
func (t *TcpHelper) watch(conn net.Conn) {
	go func() {
		defer func() {
			if err := recover(); err != nil {
				fmt.Println("连接断开", err)
			}
		}()
		for {
			conn.SetWriteDeadline(time.Now().Add(time.Second * 5))
			_, err := conn.Write([]byte("1"))

			if err != nil {
				utils.Log(nil, "连接关闭", err)
				atomic.StoreInt32(t.Full, 1)
				t.client.Close()
				t.reconnect(config.GetConf().OrderPort)
				return
			} else {
				var buffer [1]byte
				// 持续读取数据
				n, err := t.client.Read(buffer[:])
				if err == nil && n > 0 {
					recvStr := string(buffer[:n])
					fmt.Println("结果：recvStr:", recvStr)
					if recvStr == "1" {
						fmt.Println("客户端繁忙")
						atomic.StoreInt32(t.Full, 1)
					} else if recvStr == "2" {
						fmt.Println("客户端空闲")
						atomic.StoreInt32(t.Full, 0)
					}
				} else {
					atomic.StoreInt32(t.Full, 1)
					utils.Log(nil, "连接关闭", err)
				}
			}
			time.Sleep(1 * time.Second)
		}
	}()
}