const axios = require('axios')
const config = require('../../config')
const commands = require('./commands')

const client = axios.create({
  baseURL: 'https://api.line.me/v2/bot',
  headers: {
    Authorization: `Bearer ${config.line.access}`
  }
})

const pushMessage = async (target, message = '') => {
  if (typeof target !== 'string' || target.trim().length === 0) return
  if (typeof message !== 'string' || message.trim().length === 0) return

  let data = {
    to: target,
    messages: [
      {
        type: 'text',
        text: message
      }
    ]
  }

  let opts = {
    method: 'post',
    url: '/message/push',
    data
  }

  await client(opts)
}

const textMessage = async (evt) => {
  let url = '/message/reply'
  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) {
    let opts = {
      method: 'post',
      url,
      data: {
        replyToken,
        messages: [
          {
            type: 'text',
            text: result.reply
          }
        ]
      }
    }

    await client(opts)
  }
}

module.exports = {
  textMessage,
  pushMessage
}