import p from 'path'
import split2 from 'split2'
import { Readable } from 'streamx'
import { spawn } from 'child_process'
import { fileURLToPath } from 'url';

import BaresipWrapper from './lib/baresip-wrapper.mjs'

const __dirname = p.dirname(fileURLToPath(import.meta.url))

import { action, STREAM_STATUS, LOG_MESSAGE } from './state.mjs'

export class Baresip {
  constructor (opts = {}) {
    this.command = opts.command || 'baresip'
    this.config = opts.config || p.join(__dirname, '..', 'etc', 'baresip')
    this.stream = new Readable()
    this.log = []
    this.stream.on('data', row => this.log.push(row))
    this.id = 'baresip'
    this.destinationNumber = opts.destination || 901
  }

  restart () {
    if (!this.baresip) return this.start()
    this.stop(() => {
      process.nextTick(() => {
        this.start()
      })
    })
  }

  stop (cb) {
    // this.process.kill()
    if (!this.baresip) return
    this.baresip.kill(() => {
      this.stream.push(action(STREAM_STATUS, { id: this.id, status: 'stopped' }))
      if (cb) cb()
    })
  }

  _onready () {
    console.log('baresip onready')
  }

  _oncallestablished (number) {
    console.log('call established to', number)
    this.stream.push(action(STREAM_STATUS, { id: this.id, status: 'started' }))
  }

  _onhangup (number) {
    console.log('remote hangup', number)
    this.stream.push(action(STREAM_STATUS, { id: this.id, status: 'stopped' }))
  }

  _onserverconnected (...args) {
    console.log('onserverconnected', args)
    setTimeout(() => {
      this.baresip.dial(this.destinationNumber)
    }, 1000)
  }

  start () {
    const args = ['-f', this.config]
    this.baresip = new BaresipWrapper({
      command: this.command,
      args,
      callbacks: {
        ready: this._onready.bind(this),
        hangUp: this._onhangup.bind(this),
        callEstablished: this._oncallestablished.bind(this),
        serverConnected: this._onserverconnected.bind(this)
      }
    })
    this.baresip.stream.on('data', message => {
      // console.log('BARESIP', message)
      this.stream.push(action(LOG_MESSAGE, { id: this.id, type: 'stdout', message }))
    })
    this.baresip.connect()
    // if (this.process) return
    // const args = ['-c', this.config, '-v', this.logLevel]
    // this.process = spawn(this.command, args)
    // this.process.stdout.pipe(split2()).on('data', message => {
    //   this.stream.push(action(LOG_MESSAGE, { id: this.id, type: 'stdout', message }))
    //   // this.stream.push({ type: 'stdout', data })
    // })
    // this.process.stderr.pipe(split2()).on('data', message => {
    //   this.stream.push(action(LOG_MESSAGE, { id: this.id, type: 'stdout', message }))
    //   // this.stream.push({ type: 'stderr', data })
    // })

    // this.process.on('close', () => {
    //   this.stream.push(action(STREAM_STATUS, { id: this.id, status: 'stopped' }))
    //   this.process = null
    // })

    // this.stream.push(action(STREAM_STATUS, { id: this.id, status: 'started' }))

    // return new Promise((resolve, reject) => {
    //   resolve()
    // })
  }
}