const Router = require('koa-router')
const r = new Router()
const {
  resObject,
  MError
} = require('../utils')

r.use(async(c, n) => {
  c.obj = c.obj || {}
  c.chkBody = function (key = '', type = '', empty = false) {
    const uuidChk = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i
    if (!(key in c.request.body)) return false

    switch (type) {
      case 'string':
        if (typeof c.request.body[key] !== 'string' || (!empty && !c.request.body[key])) return false
        break
      case 'number':
        if (!isFinite(c.request.body[key])) return false
        break
      case 'boolean':
        if (typeof c.request.body[key] !== 'boolean') return false
        break
      case 'array':
        if (!Array.isArray(c.request.body[key]) || (!empty && c.request.body[key].length === 0)) return false
        break
      case 'uuid':
        if (typeof c.request.body[key] !== 'string') return false
        if (!empty && c.request.body[key] === '') return false
        if (!empty && !uuidChk.test(c.request.body[key])) return false
        break
      default:
        return false
    }

    return true
  }

  let obj = null
  try {
    await n()
  } catch (e) {
    console.log(e)
    obj = resObject(e instanceof MError ? e.mtype : 'InternalError', e.msg || '')
  }

  if (Object.keys(c.obj).length > 0 && 'status' in c.obj && 'obj' in c.obj) {
    c.status = c.obj.status
    c.body = c.obj.obj
  }

  if (obj !== null) {
    c.status = obj.status
    c.body = obj.obj
  }
})

r.get('/', async (c, n) => {
  c.obj = resObject('Success')
})

module.exports = r