const Router = require('koa-router')
const koaBody = require('koa-body')
const {
  chkObject,
  resObject,
  APIError,
  genError,
  checkSession,
  calPage,
  toInt
} = require('@libs/route-utils')
const DB = require('@libs/database')
const r = new Router()
const {
  comparePassword
} = require('@libs/tools')

r.use(async (c, n) => {
  c.obj = {}
  c.db = await DB.connect()
  c.chkBody = chkObject.bind(c.request)

  let obj = null
  try {
    await n()
  } catch (err) {
    console.log(err)
    obj = resObject(err instanceof APIError ? err.resKey : 'InternalError', err.apiMsg || null, err.msgCode || null)
  }

  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
  }

  c.db.release()
})

r.post('/login', koaBody(), async (c, n) => {
  if (!c.chkBody('account', 'string') || !c.chkBody('password', 'string')) throw genError('DataFormat')

  let text = `select * from "public"."account" where "account" = $1 limit 1`
  let values = [c.request.body.account]
  let userAcc = await c.db.query({text, values})
  if (userAcc.rowCount === 0) throw genError('NotFound', 'user not found')
  let matchPass = await comparePassword(c.request.body.password, userAcc.rows[0].password)
  if (!matchPass) throw genError('DataFormat', 'account or password error')

  let user = userAcc.rows[0]
  delete user.password
  c.session.user = user
  c.session.loginType = 'system'

  c.obj = resObject('Success')
})

r.post('/logout', async (c, n) => {
  c.session = null
  c.obj = resObject('Success')
})

r.get('/session', checkSession, async (c, n) => {
  c.obj = resObject('Success', {
    user: c.state.loginUser
  })
})

r.get('/line_msg', checkSession, async (c, n) => {
  let p = toInt(c.query.p, 1, 1)

  let text = `select count(*) as c from "public"."line_message_log"`
  let msgCount = await c.db.query({text})
  if (msgCount.rowCount === 0) throw genError('InternalError', 'database query fail')
  if (!('c' in msgCount.rows[0])) throw genError('InternalError', 'database query fail')
  let page = calPage(msgCount.rows[0].c, p, 20)
  text = `select g.name, u.name as user, m.message, m.ctime from "public"."line_message_log" m
    left join "public"."line_group" g
    on g.id = m.group
    left join "public"."line_user" u
    on u.id = m.user
    order by m.ctime desc
    offset $1
    limit $2`
  let values = [page.offset, page.limit]
  let msgData = await c.db.query({
    text,
    values
  })
  c.obj = resObject('Success', {
    messages: msgData.rows,
    page: {
      cur: page.page,
      total: page.totalPage
    }
  })
})

r.use('/twitch', require('./twitch').routes())

module.exports = r