import plugin from '../../lib/plugins/plugin.js'
import { createRequire } from 'module'
import fetch from 'node-fetch'
import net from 'net'
import fs from 'fs'
import YAML from 'yaml'

const require = createRequire(import.meta.url)
const { exec } = require('child_process')

const isPortTaken = async (port) => {
  return new Promise((resolve) => {
    const tester = net.createServer()
      .once('error', () => resolve(true))
      .once('listening', () => tester.once('close', () => resolve(false)).close())
      .listen(port);
  });
};

export class Restart extends plugin {
  constructor (e = '') {
    super({
      name: '重启',
      dsc: '#重启',
      event: 'message',
      priority: 10,
      rule: [{
        reg: '^#重启$',
        fnc: 'restart',
        permission: 'master'
      }, {
        reg: '^#(停机|关机)$',
        fnc: 'stop',
        permission: 'master'
      }]
    })

    if (e) this.e = e

    this.key = 'Yz:restart'
  }

  async init () {
    let restart = await redis.get(this.key)
    if (restart) {
      restart = JSON.parse(restart)
      const uin = restart?.uin || Bot.uin
      let time = restart.time || new Date().getTime()
      time = (new Date().getTime() - time) / 1000

      let msg = `重启成功：耗时${time.toFixed(2)}秒`
      try {
        if (restart.isGroup) {
          Bot[uin].pickGroup(restart.id).sendMsg(msg)
        } else {
          Bot[uin].pickUser(restart.id).sendMsg(msg)
        }
      } catch (error) {
        /** 不发了，发不出去... */
        logger.debug(error)
      }
      redis.del(this.key)
    }
  }

  async restart () {
    let restart_port
    try {
      restart_port = YAML.parse(fs.readFileSync(`./config/config/bot.yaml`, `utf-8`))
      restart_port = restart_port.restart_port || 27881
    } catch { }
    await this.e.reply('开始执行重启，请稍等...')
    logger.mark(`${this.e.logFnc} 开始执行重启，请稍等...`)

    let data = JSON.stringify({
      uin: this.e?.self_id || this.e.bot.uin,
      isGroup: !!this.e.isGroup,
      id: this.e.isGroup ? this.e.group_id : this.e.user_id,
      time: new Date().getTime()
    })

    let npm = await this.checkPnpm()
    await redis.set(this.key, data, { EX: 120 })
    if(await isPortTaken(restart_port || 27881)) {
      try {
        let result = await fetch(`http://localhost:${restart_port || 27881}/restart`)
        result = await result.text()
        if(result !== `OK`) {
          redis.del(this.key)
          this.e.reply(`操作失败！`)
          logger.error(`重启失败`)
        }
      } catch(error) {
        redis.del(this.key)
        this.e.reply(`操作失败！\n${error}`)
      }
    } else {
      try {
        let cm = `${npm} start`
        if (process.argv[1].includes('pm2')) {
          cm = `${npm} run restart`
        }
  
        exec(cm, { windowsHide: true }, (error, stdout, stderr) => {
          if (error) {
            redis.del(this.key)
            this.e.reply(`操作失败！\n${error.stack}`)
            logger.error(`重启失败\n${error.stack}`)
          } else if (stdout) {
            logger.mark('重启成功，运行已由前台转为后台')
            logger.mark(`查看日志请用命令：${npm} run log`)
            logger.mark(`停止后台运行命令：${npm} stop`)
            process.exit()
          }
        })
      } catch (error) {
        redis.del(this.key)
        let e = error.stack ?? error
        this.e.reply(`操作失败！\n${e}`)
      }
    }

    return true
  }

  async checkPnpm () {
    let npm = 'npm'
    let ret = await this.execSync('pnpm -v')
    if (ret.stdout) npm = 'pnpm'
    return npm
  }

  async execSync (cmd) {
    return new Promise((resolve, reject) => {
      exec(cmd, { windowsHide: true }, (error, stdout, stderr) => {
        resolve({ error, stdout, stderr })
      })
    })
  }

  async stop () {
    let restart_port
    try {
      restart_port = YAML.parse(fs.readFileSync(`./config/config/bot.yaml`, `utf-8`))
      restart_port = restart_port.restart_port || 27881
    } catch { }
    if(await isPortTaken(restart_port || 27881)) {
      try {
        logger.mark('关机成功，已停止运行')
        await this.e.reply(`关机成功，已停止运行`)
        await fetch(`http://localhost:${restart_port || 27881}/exit`)
        return
      } catch(error) {
        this.e.reply(`操作失败！\n${error}`)
        logger.error(`关机失败\n${error}`)
      }
    }

    if (!process.argv[1].includes('pm2')) {
      logger.mark('关机成功，已停止运行')
      await this.e.reply('关机成功，已停止运行')
      process.exit()
    }

    logger.mark('关机成功，已停止运行')
    await this.e.reply('关机成功，已停止运行')

    let npm = await this.checkPnpm()
    exec(`${npm} stop`, { windowsHide: true }, (error, stdout, stderr) => {
      if (error) {
        this.e.reply(`操作失败！\n${error.stack}`)
        logger.error(`关机失败\n${error.stack}`)
      }
    })
  }
}