const DB = require('../../database')
const actions = require('./actions')

const parseCMD = async (text = '', source = {}) => {
  if (typeof text !== 'string' || text.trim().length === 0) return null
  if (!source || typeof source !== 'object' || !('type' in source)) return null
  let txt = text.trim()
  let arr = txt.split(' ').map(t => t.trim())
  if (arr.length === 0) return null
  if (arr[0][0] !== '!') return null
  let cmd = arr[0].replace(/^!/, '')

  let db = await DB.connect()
  let reply = null

  try {
    let result = await db.query({
      text: `select "message" from "public"."commands" where "cmd" = $1`,
      values: [cmd]
    })
    if (result.rowCount > 0) {
      let content = result.rows[0].message
      let m = content.match(/{{(.+?)}}/g)
      if (m !== null && m.length > 0) {
        for (let i = 0; i < m.length; i++) {
          let c = m[i].replace(/^{{/, '').replace(/}}$/, '')
          let res = await actions(c, arr.slice(1).join(' '), source)
          content = content.replace(m[i], res || '')
        }
      }
      if (content.trim().length > 0) {
        reply = {
          reply: content
        }
      }
    }
  } catch (err) {
    console.log(err)
  }

  db.release()
  return reply
}

module.exports = parseCMD