const fs = require('fs/promises')
const path = require('path')
const readline = require('readline')
const json5 = require('json5')
const matrix = require('matrix-js-sdk')

const createBot = require('./bot.js')
const fileExists = require('./util/file_exists')
const Console = require('./util/console')

async function main () {
  // config loading
  const configPath = process.argv[2] ?? 'config.json5'
  if (!await fileExists(configPath)) {
    await fs.copyFile(path.join(__dirname, 'default.json5'), configPath)
    console.info('No config file was found, so a default one was created')
  }
  const config = json5.parse(await fs.readFile(configPath, 'utf-8'))

  // logging
  const logdir = config.paths.logs ?? 'logs'
  if (!await fileExists(logdir)) await fs.mkdir(logdir)

  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
    prefix: '> '
  })

  const console = new Console({ readline: rl })
  await console.createLogFile(logdir)

  const matrixClients = {}
  for (const key in config.matrixClients) {
    const client = matrix.createClient(config.matrixClients[key])
    matrixClients[key] = client

    client.startClient()
  }

  const bots = []
  for (const options of config.bots) {
    const mergedOptions = {
      console,
      paths: config.paths,
      ...(config.all ?? {}),
      ...options
    }
    if (mergedOptions.matrix && typeof mergedOptions.matrix.client !== 'object') mergedOptions.matrix.client = matrixClients[mergedOptions.matrix.client]

    const bot = createBot(mergedOptions)
    bots.push(bot)
    bot.bots = bots

    bot.on('error', error => bot.console.error(error.stack))
  }

  process.on('uncaughtException', error => {
    if (error.stack.includes('protodef') || error.code === 'Z_BUF_ERROR') {
      console.error('Uncaught protodef exception!\n' + error.stack)
      return // Ignore protodef-related errors (packet-related)
    }

    console.error(error)
    process.exit(1)
  })
}

main()