import website from '~src/config/index'
import { isNullES } from 'js-fast-way'

// 长链接推送插件
export default class HcSocket {

    static socket = null

    static create(data, change) {
        const socket = new WebSocket(website.socket + data)
        socket.onopen = function () {
            console.log('websocket 链接成功')
        }
        socket.onclose = function () {
            console.log('websocket 链接已断开')
        }
        socket.onmessage = function ({ data }) {
            if (typeof change !== 'function') {
                return false
            } else {
                change(JSON.parse(data))
            }
        }
        socket.onerror = function ({ data }) {
            console.log('websocket 发生错误:', data)
        }
        this.socket = socket
    }

    //发送消息
    static async send(data) {
        const is_socket = await this.isSocket()
        if (!is_socket) return false
        this.socket.send(data)
    }

    //链接是否存在
    static async isSocket(i = 0) {
        let _this = this
        return new Promise((resolve) => {
            if (isNullES(_this.socket)) {
                if (i <= 30) {
                    setTimeout(async () => {
                        i++
                        resolve(await _this.isSocket(i))
                    }, 1000)
                } else {
                    resolve(false)
                }
            } else {
                resolve(true)
            }
        })
    }

}