module.exports = inject

function inject (bot) {
  let swingInterval = null
  let waitTimeout = null

  bot.targetDigBlock = null
  bot.lastDigTime = null

  function dig (block, cb) {
    if (bot.targetDigBlock) bot.stopDigging()
    cb = cb || noop
    bot.lookAt(block.position.offset(0.5, 0.5, 0.5), false, () => {
      bot._client.write('block_dig', {
        status: 0, // start digging
        location: block.position,
        face: 1 // hard coded to always dig from the top
      })
      const waitTime = bot.digTime(block)
      waitTimeout = setTimeout(finishDigging, waitTime)
      bot.targetDigBlock = block
      bot._client.write('arm_animation', { hand: 0 })
      swingInterval = setInterval(() => {
        bot._client.write('arm_animation', { hand: 0 })
      }, 350)
      const eventName = `blockUpdate:${block.position}`
      bot.on(eventName, onBlockUpdate)

      bot.stopDigging = () => {
        if (bot.targetDigBlock === null) return
        bot.removeListener(eventName, onBlockUpdate)
        clearInterval(swingInterval)
        clearTimeout(waitTimeout)
        swingInterval = null
        waitTimeout = null
        bot._client.write('block_dig', {
          status: 1, // cancel digging
          location: bot.targetDigBlock.position,
          face: 1 // hard coded to always dig from the top
        })
        const block = bot.targetDigBlock
        bot.targetDigBlock = null
        bot.lastDigTime = new Date()
        bot.emit('diggingAborted', block)
        bot.stopDigging = noop
        cb(new Error('Digging aborted'))
      }

      function onBlockUpdate (oldBlock, newBlock) {
        // vanilla server never actually interrupt digging, but some server send block update when you start digging
        // so ignore block update if not air
        if (newBlock.type !== 0) return
        bot.removeListener(eventName, onBlockUpdate)
        clearInterval(swingInterval)
        clearTimeout(waitTimeout)
        swingInterval = null
        waitTimeout = null
        bot.targetDigBlock = null
        bot.lastDigTime = new Date()
        bot.emit('diggingCompleted', newBlock)
        cb()
      }

      function finishDigging () {
        clearInterval(swingInterval)
        clearTimeout(waitTimeout)
        swingInterval = null
        waitTimeout = null
        bot._client.write('block_dig', {
          status: 2, // finish digging
          location: bot.targetDigBlock.position,
          face: 1 // hard coded to always dig from the top
        })
        bot.targetDigBlock = null
        bot.lastDigTime = new Date()
        bot._updateBlock(block.position, 0, 0)
      }
    })
  }

  function canDigBlock (block) {
    return block && block.diggable && block.position.offset(0.5, 0.5, 0.5).distanceTo(bot.entity.position) < 6
  }

  function digTime (block) {
	return 1500
    //return //block.digTime(bot.heldItem ? bot.heldItem.type : null, bot.game.gameMode === 'creative',
    //bot.blockAt(bot.entity.position).type === 9, !bot.entity.onGround) // only stationary water counts
  }

  bot.dig = dig
  bot.stopDigging = noop
  bot.canDigBlock = canDigBlock
  bot.digTime = digTime
}

function noop (err) {
  if (err) throw err
}