#!/usr/bin/env node
// @ts-check

const debug = require('debug')
const path = require('path')
const parse = require('minimist')
const { addAlias } = require('module-alias')
const { Telegraf } = require('../lib/telegraf')

const log = debug('telegraf:cli')

const help = () => {
  console.log(`Usage: telegraf [opts] <bot-file>
  -t  Bot token [$BOT_TOKEN]
  -d  Webhook domain
  -H  Webhook host [0.0.0.0]
  -p  Webhook port [$PORT or 3000]
  -l  Enable logs
  -h  Show this help message`)
}

const args = parse(process.argv, {
  alias: {
    t: 'token',
    d: 'domain',
    H: 'host',
    h: 'help',
    l: 'logs',
    p: 'port'
  },
  boolean: ['h', 'l', 's'],
  default: {
    H: '0.0.0.0',
    p: process.env.PORT || 3000
  }
})

if (args.help) {
  help()
  process.exit(0)
}

const token = args.token || process.env.BOT_TOKEN
const domain = args.domain || process.env.BOT_DOMAIN
if (!token) {
  console.error('Please supply Bot Token')
  help()
  process.exit(1)
}

let [, , file] = args._

if (!file) {
  try {
    const packageJson = require(path.resolve(process.cwd(), 'package.json'))
    file = packageJson.main || 'index.js'
  } catch (err) {
  }
}

if (!file) {
  console.error('Please supply a bot handler file.\n')
  help()
  process.exit(1)
}

if (file[0] !== '/') {
  file = path.resolve(process.cwd(), file)
}

let botHandler
let httpHandler
let tlsOptions

try {
  if (args.logs) {
    debug.enable('telegraf:*')
  }
  addAlias('telegraf', path.join(__dirname, '../'))
  const mod = require(file)
  botHandler = mod.botHandler || mod
  httpHandler = mod.httpHandler
  tlsOptions = mod.tlsOptions
} catch (err) {
  console.error(`Error importing ${file}`, err.stack)
  process.exit(1)
}

const config = {}
if (domain) {
  config.webhook = {
    tlsOptions,
    host: args.host,
    port: args.port,
    domain: domain,
    cb: httpHandler
  }
}

const bot = new Telegraf(token)
bot.use(botHandler)

log(`Starting module ${file}`)
bot.launch(config)

// Enable graceful stop
process.once('SIGINT', () => bot.stop('SIGINT'))
process.once('SIGTERM', () => bot.stop('SIGTERM'))