package nnet

import (
	"crypto/tls"
	"git.noahlan.cn/noahlan/nnet/config"
	"git.noahlan.cn/noahlan/nnet/conn"
	"git.noahlan.cn/noahlan/ntool/nlog"
	"github.com/gorilla/websocket"
	"github.com/jpillora/backoff"
	"net/http"
	"time"
)

// DialWebsocket websocket方式 连接服务器
func (ngin *Engine) DialWebsocket(url string, conf config.WSClientFullConf, evtOpts ...WsEventOption) (*conn.Connection, error) {
	for _, opt := range evtOpts {
		opt(conf.WSEvent)
	}

	ngin.ReadDeadline = conf.ReadDeadline
	ngin.WriteDeadline = conf.WriteDeadline

	err := ngin.setup()
	if err != nil {
		nlog.Errorf("%s failed to setup server, err:%v", ngin.LogPrefix(), err)
		return nil, err
	}

	dialer := websocket.Dialer{
		TLSClientConfig: &tls.Config{
			InsecureSkipVerify: true,
		},
		HandshakeTimeout:  conf.HandshakeTimeout,
		ReadBufferSize:    conf.ReadBufferSize,
		WriteBufferSize:   conf.WriteBufferSize,
		EnableCompression: conf.Compression,
	}

	// 连接重试
	b := &backoff.Backoff{
		Factor: conf.RecFactor,
		Jitter: true,
		Min:    conf.MinRecTime,
		Max:    conf.MaxRecTime,
	}

	var wsConn *websocket.Conn
	for {
		nextRec := b.Duration()
		wsConn, _, err = dialer.Dial(url, http.Header{})
		if err != nil {
			ngin.evtMgr.OnConnectError(err)
			time.Sleep(nextRec)
			continue
		}
		if conf.ReadLimit != 0 {
			wsConn.SetReadLimit(conf.ReadLimit)
		}
		break
	}

	nlog.Infof("%s now connect to %s...", ngin.LogPrefix(), url)

	return ngin.handleWS(wsConn, conf.WSEvent), nil
}