const { App: SlackApp } = require('@slack/bolt')
const config = require('../config')

const temperatureChannelId = 'C034156CE03'
const hvackerBotUserId = 'U0344TFA7HQ'
const sageUserId = 'U028BMEBWBV'

const pollingMinutes = 5
const pollingPeriod = 1000 * 60 * pollingMinutes

const colderEmoji = 'snowflake'
const hotterEmoji = 'fire'
const goodEmoji = '+1'

let app
try {
  app = new SlackApp({
    token: config.slackBotToken,
    signingSecret: config.slackSigningSecret,
    appToken: config.slackAppToken,
    socketMode: true
  })
  // app.client.conversations.list({types: 'private_channel'}).then(fetched => {
  //   temperatureChannelId = fetched.channels.filter(channel => channel.name === 'thermo-posting')[0].id
  //   console.log('techThermostatChannelId', temperatureChannelId)
  // })
} catch (e) {
  console.log('Failed to initialize SlackApp', e)
}

const pollTriggers = ['!temp', '!temperature', '!imhot', '!imcold']
const halfTriggers = ['change temperature', "i'm cold", "i'm hot", 'quack', 'hvacker', '<@U0344TFA7HQ>']

const sendHelp = async (say, prefix) => {
  if (prefix) {
    prefix = prefix + '\n'
  } else {
    prefix = ''
  }

  await say({
    text: prefix +
      `Sending a message matching any of \`${pollTriggers.join('`, `')}\` will start a temperature poll.\n` +
      'At this time I am not capable of actually changing the temperature. Go bug Quade.'
  })
}

const getMessage = async ({ channel, ts }) => app.client.conversations.history({
  channel: channel,
  latest: ts,
  inclusive: true,
  limit: 1
})

app.event('reaction_added', async ({ event, context, client, say }) => {
  for (const listener of reactionListeners) {
    listener({ event, say })
  }
})

const ourUsers = {
  U028BMEBWBV: 'Sage',
  U02U15RFK4Y: 'Adam',
  U02AAB54V34: 'Houston',
  U02KYLVK1GV: 'Quade',
  U017PG4EL1Y: 'Max',
  UTDLFGZA5: 'Tyler',
  U017CB5L1K3: 'Andres'
}

const activePolls = {}
const testId = 'U028BMEBWBV_TEST'
let testMode = false
app.event('message', async ({ event, context, client, say }) => {
  console.log(event)
  if (event.user === sageUserId) {
    if (event?.text.startsWith('!')) {
      if (testMode) {
        await messageSage('Currently in test mode!')
      }
    }
    if (event?.text === '!test') {
      testMode = !testMode
      await messageSage(`TestMode: ${testMode} with ID ${testId}`)
    } else if (event?.text === '!notest') {
      testMode = false
      await messageSage(`TestMode: ${testMode}`)
    }
    if (testMode) {
      event.user = testId
    }
    // console.log(event.blocks[0].elements[0])
  }
  for (const listener of messageListeners) {
    listener({ event, say })
  }
  console.log('MSG', ourUsers[event.user], "'" + event.text + "'", new Date().toLocaleTimeString())
  if (event.user === 'U028BMEBWBV' && event.channel === 'D0347Q4H9FE') {
    if (event.text === '!!kill') {
      process.exit()
    }
    if (event.text?.startsWith('!say ') || event.text?.startsWith('!say\n')) {
      await postToTechThermostatChannel(event.text.substring(4).trim())
      return
    }
    if (event.text?.startsWith('!saytoq ')) {
      await messageQuade(event.text.substring(7).trim())
      return
    }
    if (event.text?.startsWith('!saytos')) {
      await messageSage(event.text.substring(7).trim())
      return
    }
  }
  const eventText = event.text?.toLowerCase() || ''

  if (eventText.startsWith('!help')) {
    await sendHelp(say)
    return
  }

  if (!pollTriggers.includes(eventText)) {
    if (halfTriggers.includes(eventText)) {
      await sendHelp(say, 'It looks like you might want to change the temperature.')
    }
    return
  }

  if (activePolls[event.channel]) {
    await postToTechThermostatChannel({ text: "There's already an active poll in this channel!" })
    return
  }

  activePolls[event.channel] = true
  const pollTs = await startPoll()
  setTimeout(async () => {
    const reactions = await app.client.reactions.get({
      channel: temperatureChannelId,
      timestamp: pollTs,
      full: true
    })
    const reactCounts = {}
    reactions.message.reactions.forEach(reaction => { reactCounts[reaction.name] = reaction.count })

    const contentVotes = reactCounts[goodEmoji]
    const hotterVotes = reactCounts[hotterEmoji]
    const colderVotes = reactCounts[colderEmoji]

    let text = 'The people have spoken, and would like to '
    if (hotterVotes > colderVotes && hotterVotes > contentVotes) {
      text += 'raise the temperature, quack.'
      requestTempChange('Hotter')
    } else if (colderVotes > hotterVotes && colderVotes > contentVotes) {
      text += 'lower the temperature, quack quack.'
      requestTempChange('Colder')
    } else {
      text += 'keep the temperature as-is, quaaack.'
      requestTempChange('Good')
    }

    await postToTechThermostatChannel({ text })
    delete activePolls[event.channel]
  }, pollingPeriod)
})

;(async () => {
  await app.start().catch(console.error)
  console.log('Slack Bolt has started')
  // setTimeout(async () => {
  //   await messageSage('<https://i.imgur.com/VCvfvdz.png|...>')
  // }, 2000)
})()

const postToTechThermostatChannel = async optionsOrText => {
  if (optionsOrText === null || typeof optionsOrText !== 'object') {
    optionsOrText = {
      text: optionsOrText
    }
  }
  return app.client.chat.postMessage({ ...optionsOrText, channel: temperatureChannelId })
}

const messageSage = async optionsOrText => messageIn(sageUserId, optionsOrText)
const messageQuade = async optionsOrText => messageIn('U02KYLVK1GV', optionsOrText)

const messageIn = async (channel, optionsOrText) => {
  if (optionsOrText === null || typeof optionsOrText !== 'object') {
    optionsOrText = {
      text: optionsOrText
    }
  }
  return app.client.chat.postMessage({ ...optionsOrText, channel })
}

const startPoll = async () => {
  const sent = await postToTechThermostatChannel({
    text: `<!here|here> Temperature poll requested! In ${pollingMinutes} minutes the temperature will be adjusted.\n` +
      `Pick :${colderEmoji}: if you want it colder, :${hotterEmoji}: if you want it hotter, or :${goodEmoji}: if you like it how it is.` +
      `\n(Note that I can't actually change the temperature yet. Make Quade do it!)`
  })
  const addReaction = async emojiName =>
    app.client.reactions.add({
      channel: temperatureChannelId,
      timestamp: sent.ts,
      name: emojiName
    })
  await addReaction(colderEmoji)
  await addReaction(hotterEmoji)
  await addReaction(goodEmoji)
  return sent.ts
}

const tempChangeListeners = []
const messageListeners = []
const reactionListeners = []

const requestTempChange = change => {
  tempChangeListeners.forEach(listener => listener(change))
}

const encodeData = (key, data) =>
  `<http://${key}ZZZ${Buffer.from(JSON.stringify(data), 'utf-8').toString('base64')}| >`

const decodeData = (key, message) => {
  const regex = new RegExp(`http://${key}ZZZ[^|]*`)
  let match = message.match(regex)
  if (!match) {
    return match
  }
  match = match[0].substring(10 + key.length) // 10 === 'http://'.length + 'ZZZ'.length
  return JSON.parse(Buffer.from(match, 'base64').toString('utf-8'))
}

const onReaction = listener => reactionListeners.push(listener)

onReaction(async ({ event }) => {
  if (event.user === sageUserId && event.reaction === 'x') {
    console.log(event)
    try {
      await app.client.chat.delete({channel: event.item.channel, ts: event.item.ts})
    } catch (e) {
      console.error(e)
    }
  }
})

module.exports = {
  app,
  hvackerBotUserId,
  temperatureChannelId,
  onAction: app.action,
  getMessage,
  updateMessage: app.client.chat.update,
  postToTechThermostatChannel,
  onTempChangeRequested: listener => tempChangeListeners.push(listener),
  onMessage: listener => messageListeners.push(listener),
  onReaction,
  encodeData,
  decodeData,
  sageUserId,
  messageSage,
  messageIn,
  testMode,
  testId,
  ourUsers
}