const Router = require('koa-router')
const {
  genError,
  checkSession,
  resObject,
  chkObject,
  toInt
} = require('@libs/route-utils')
const r = new Router()
const evt = require('@root/event')

const typeTwitch = async (c, n) => {
  let text = `select * from "public"."twitch_channel" where "id" = $1`
  let values = [c.session.user.id]
  let result = await c.db.query({text, values})
  c.state.channelList = result.rows
  return n()
}

const typeSystem = async (c, n) => {
  let text = `select * form "public"."twitch_channel"`
  let values = [c.session.user.id]
  let result = await c.db.query({text, values})
  c.state.channelList = result.rows
  return n()
}

const getChannelList = async (c, n) => {
  if (c.session.loginType === 'twitch') {
    return typeTwitch(c, n)
  } else if (c.session.loginType === 'system') {
    return typeSystem(c, n)
  }

  throw genError('Forbidden')
}

const hasChannel = (key = '') => {
  if (typeof key !== 'string' || key.trim().length === 0) key = 'chid'
  key = key.trim()
  return async (c, n) => {
    if (!('channelList' in c.state) || !Array.isArray(c.state.channelList)) throw genError('InternalError')
    let chid = c.params[key] || ''
    c.state.chid = chid
    let chk = chkObject.bind({body: {chid}})
    if (!chk('chid', 'string')) throw genError('DataFormat')

    if (c.state.channelList.length === 0) throw genError('NotFound', 'channel not found')
    let channel = c.state.channelList.filter(t => t.id === chid)
    if (channel.length === 0) throw genError('NotFound', 'channel not found')

    c.state.channel = channel[0]
    return n()
  }
}

r.get('/channels', checkSession, getChannelList, async (c, n) => {
  if (!('channelList' in c.state) || !Array.isArray(c.state.channelList)) throw genError('InternalError')

  c.obj = resObject('Success', {
    list: c.state.channelList
  })
})

r.get('/channel/:chid', checkSession, getChannelList, hasChannel('chid'), async (c, n) => {
  c.obj = resObject('Success', {channel: c.state.channel})
})

r.put('/channel/:chid/botjoin', checkSession, getChannelList, hasChannel('chid'), async (c, n) => {
  if (!c.chkBody('join', 'number')) throw genError('DataFormat')
  let join = toInt(c.request.body.join, 0, 0, 1)
  let text = `update "public"."twitch_channel" set "join" = $1 where "id" = $2`
  let values = [!!join, c.state.channel.id]
  await c.db.query({
    text,
    values
  })

  evt.emit(join ? 'twitchJoin' : 'twitchLeave', c.state.channel.name)

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

r.put('/channel/:chid/opay', checkSession, getChannelList, hasChannel('chid'), async (c, n) => {
  if (!c.chkBody('opay', 'string', true)) throw genError('DataFormat')

  let text = `update "public"."twitch_channel" set "opayid" = $1 where "id" = $2`
  let values = [c.request.body.opay, c.state.channel.id]
  await c.db.query({
    text,
    values
  })

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

r.get('/channel/:chid/donation', checkSession, getChannelList, hasChannel('chid'), async (c, n) => {
  let text = `select ds.* from "public"."donate_setting" ds 
    left join "public"."twitch_channel" tw
    on tw.id = ds.twitch
    where 
    tw.id = $1`
  let values = [c.state.channel.id]
  let result = await c.db.query({
    text,
    values
  })
  c.obj = resObject('Success', {
    list: result.rows
  })
})

module.exports = r