# Description:
#   enable communication with Phabricator via Conduit api
#   listens to conversations and supplement with phabricator metadata
#   when an object is cited.
#
# Dependencies:
#
# Configuration:
#   PHABRICATOR_URL
#   PHABRICATOR_API_KEY
#   PHABRICATOR_PROJECTS
#   PHABRICATOR_BOT_PHID
#
# Commands:
#   anything Txxx - complements with the title of the cited object
#
# Author:
#   mose

Phabricator = require '../lib/phabricator'

humanFileSize = (size) ->
  i = Math.floor( Math.log(size) / Math.log(1024) )
  return ( size / Math.pow(1024, i) ).toFixed(2) * 1 + ' ' + ['B', 'kB', 'MB', 'GB', 'TB'][i]

module.exports = (robot) ->
  phab = new Phabricator robot, process.env

  #   anything Txxx - complements with the title of the cited object
  robot.hear new RegExp(
    "(?:.+|^)(?:(#{process.env.PHABRICATOR_URL})/?| |^)" +
    '(?:(T|F|P|M|B|Q|L|V)([0-9]+)|(r[A-Z]+[a-f0-9]{10,}))'
  ), (msg) ->
    url = msg.match[1]
    type = msg.match[2] ? msg.match[4]
    id = msg.match[3]
    switch
      
      when 'T' is type
        phab.taskInfo id, (body) ->
          if body['error_info']?
            msg.send "oops #{type}#{id} #{body['error_info']}"
          else
            closed = ''
            if body['result']['isClosed'] is true
              closed = " (#{body['result']['status']})"
            if url?
              msg.send "#{type}#{id}#{closed} - #{body['result']['title']} " +
                       "(#{body['result']['priority']})"
            else
              msg.send "#{body['result']['uri']}#{closed} - #{body['result']['title']} " +
                       "(#{body['result']['priority']})"
            phab.recordPhid msg.envelope.user, id
      
      when 'F' is type
        phab.fileInfo id, (body) ->
          if body['error_info']?
            msg.send "oops #{type}#{id} #{body['error_info']}"
          else
            size = humanFileSize(body['result']['byteSize'])
            if url?
              msg.send "#{type}#{id} - #{body['result']['name']} " +
                       "(#{body['result']['mimeType']} #{size})"
            else
              msg.send "#{body['result']['uri']} - #{body['result']['name']} "+
                       "(#{body['result']['mimeType']} #{size})"
      
      when 'P' is type
        phab.pasteInfo id, (body) ->
          if Object.keys(body['result']).length < 1
            msg.send "oops #{type}#{id} was not found."
          else
            lang = ''
            key = Object.keys(body['result'])[0]
            if body['result'][key]['language'] isnt ''
              lang = " (#{body['result'][key]['language']})"
            if url?
              msg.send "#{type}#{id} - #{body['result'][key]['title']}#{lang}"
            else
              msg.send "#{body['result'][key]['uri']} - #{body['result'][key]['title']}#{lang}"
      
      when /^M|B|Q|L|V$/.test type
        phab.genericInfo "#{type}#{id}", (body) ->
          if Object.keys(body['result']).length < 1
            msg.send "oops #{type}#{id} was not found."
          else
            v = body['result']["#{type}#{id}"]
            status = ''
            if v['status'] is 'closed'
              status = " (#{v['status']})"
            if url?
              msg.send "#{v['fullName']}#{status}"
              return
            else
              fullname = v['fullName'].replace("#{type}#{id}: ", '').replace("#{type}#{id} ", '')
              msg.send "#{v['uri']} - #{fullname}#{status}"
              return

      when /^r[A-Z]+[a-f0-9]{10,}$/.test type
        phab.genericInfo type, (body) ->
          if Object.keys(body['result']).length < 1
            msg.send "oops #{type} was not found."
          else
            v = body['result']["#{type}"]
            status = ''
            if v['status'] is 'closed'
              status = " (#{v['status']})"
            if url?
              msg.send "#{v['fullName']}#{status}"
              return
            else
              fullname = v['fullName'].replace "#{type}: ", ''
              msg.send "#{v['uri']} - #{fullname}#{status}"
              return