const commands = require('./commands')
const api = require('../api-action')

/**
 * parse text message object
 * @param {object} evt line message event object
 */
const textMessage = async (evt) => {
  let {replyToken, source, message} = evt
  if (!source || !('type' in source) || source.type !== 'group') return
  if (!message || message.type !== 'text') return
  let {text} = message
  if (typeof text !== 'string') return
  text = text.trim()
  if (text.length === 0) return

  let result = await commands(text, source)
  if (result === null) return
  if (typeof result === 'object' && 'reply' in result) {
    await api.line.replyMessage(replyToken, result.reply)
  }
}

module.exports = {
  textMessage
}