# Description:
#   funzioni speciali per telegram-cli
#
# Configuration:
#   Uses hubot-tg enviroment variables
#
# Commands
#   hubot chi sei - chiedi a hubot di identificarsi
#   hubot chi sono / cosa sai di me - mostra il tuo contatto nel registro di hubot
#   hubot in che gruppi sei / dove scrivi - chiedi a hubot dove chatta
#   hubot (mi inviti / invitami) (nel gruppo / in) - chiedi ad hubot di invitardi in un gruppo
#   hubot (aggiungi[mi] / crea) (il mio / [tra]i contatto/i) [telefono] - chiedi ad hubot creare il tuo contatto
#
# Author:
#   Michele Guerini Rocco (rnhmjoj)
#

net = require 'net'

module.exports = (robot) ->

  # format a name a telegram-cli likes it
  norm = (x) -> x.replace /\ /g, '_'

  # directly run a command in telegram-cli and return its output
  # (a list of strings)
  run_command = (command, callback) ->
    client = net.connect robot.adapter.port, robot.adapter.host, ->
      client.write command+'\n'
    client.setEncoding 'utf8'
    client.on 'data', (reply) ->
      if callback?
        callback (reply.split '\n')[1..-3]
      client.end()

  # return an object with the known chat information
  chat_info = (name, callback) ->
    run_command "chat_info #{norm name}", (data) ->
      match = data[0].match ///
        Chat\ (\w+(\ ?\w+)*)  # chat name
        \ \(id\ (\d+)\)       # chat id
        ///
      chat =
        name: match[1]
        id: 'chat#'+match[3]
        members: data[1..].map (i) -> (i.split ' invited')[0].replace /\t/g, ''
      robot.logger.info 'parsed chat data: ' + JSON.stringify chat, null, 2
      callback chat

  # return an object with the known user information
  user_info = (name, callback) ->
    run_command "user_info #{norm name}", (data) ->
      match = (data.join '\n').match ///
        User\ (\w+(\ ?\w+)*)  # contact name
        (\ @(\w+))?           # telegram username
        (\ \(\#(\d+)\))?      # telegram id
        [\s\S]+phone:\ (\d+)? # phone number
        ///
      user =
        name:     match[1]
        username: match[4]
        id:       'user#'+match[6]
        phone:    match[7]
      robot.logger.info 'parsed user data: ' + JSON.stringify user, null, 2
      callback user

  # get hubot telegram profile information
  robot_info = (callback) ->
    run_command 'get_self', (data) ->
      match = (data.join '\n').match ///
        User\ (\w+(\ ?\w+)*)  # contact name
        (\ @(\w+))?           # telegram username
        (\ \(\#(\d+)\))?      # telegram id
        [\s\S]+phone:\ (\d+)? # phone number
        ///
      user =
        name:     match[1]
        username: match[4]
        id:       'user#'+match[6]
        phone:    match[7]
      robot.logger.info 'parsed robot data: ' + JSON.stringify user, null, 2
      callback user

  # return the list of active chat groups
  chat_list = (callback) ->
    run_command 'dialog_list', (list) ->
      chats = list.filter (item) -> not item.lastIndexOf 'Chat', 0
      chats = chats.map (chat) -> (chat.match /Chat (.+):/)[1]
      robot.logger.info 'parsed bot chats list: ' + JSON.stringify chats, null, 2
      callback chats

  # add a user to the contact list
  add_contact = (name, phone, callback) ->
    robot.logger.info "create contact for user #{name}"
    user_info name, (user) ->
      [first, last...] = user.name.split ' '
      phone = phone or user.phone
      if not phone?
        return callback 'serve per forza il tuo numero'
      run_command "add_contact #{phone} '#{first}' '#{last.join ' '}'", (reply) ->
        robot.logger.info 'result: ' + reply
        reply = reply[0].split ' '
        if reply[0] is 'FAIL:'
          return callback reply[1..]
        callback()

  robot.respond /chi sei/, (res) ->
    robot_info (user) ->
      username = if user.username? then " noto anche come #{user.username}" else ''
      phone    = if user.phone?    then " chiamatemi al #{user.phone}. "    else '. '
      id       = "il mio id di telegram è #{user.id}"
      res.send "sono #{user.name}#{username},#{phone}#{id}"

  robot.respond /(cosa sai di me|chi sono)/i, (res) ->
    user_info res.message.user.name, (user) ->
      username = if user.username? then " ma ti chiamano anche #{user.username}" else ''
      phone    = if user.phone?    then " so il tuo numero: #{user.phone} e "    else ' '
      id       = "il tuo id di telegram è #{user.id}"
      res.send "so che sei #{user.name}#{username},#{phone}#{id}"

  robot.respond /(in che gruppi sei| dove scrivi)/, (res) ->
    intro = ['scrivo in questi gruppi', 'chatto qui', 'sono attivo in']
    chat_list (list) ->
      res.send (res.random intro) + ':\n' + (list.map (i) -> '* '+i).join '\n'

  robot.respond /(aggiungi(mi)?|crea) ((trai? (i )?contatti)|(il mio contatto))( (\d+))?/, (res) ->
    add_contact res.message.user.name, res.match[8], (err) ->
      if err?
        res.send "c'è un problema: " + err
      else
        res.send "fatto!"

  robot.respond /(mi )?invit(i|ami) (in|nel gruppo) ([^?]+)\??/, (res) ->
    denied = ['BZBZ ADMIN-NOT-DETECTED', 'BZBZ IS-NOT-AUTHORIZED', 'BZBZ ACCESS-DENIED']
    nope   = ['ahahah NO', 'mai sentito questo', 'invita anche me magari', 'che?']
    ok     = ['provvedo subito', 'ok', 'certo', 'va bene']
    done   = ['fatto', 'ecco qui', 'ecco fatto']

    user = res.message.user
    name = res.match[4]
    admin_id = process.env['ADMIN_ROOM'].replace ':', '#'

    chat_list (list) ->
      if not (name in list)
          return res.send res.random nope
      chat_info name, (chat) ->
        if chat.id is admin_id
          return res.send res.random denied
        if user.name in chat.members
          return res.send 'ma sei già nel gruppo... [facepalm]'
        res.send res.random ok

        run_command "chat_add_user #{chat.id} #{user.id}", (reply) ->
          robot.logger.info "add user #{user.name} to chat #{chat.name}"
          robot.logger.info 'result: ' + reply[0]
          err = (reply[0].split ' ')[-1..][0]
          if err is 'SUCCESS'
            robot.messageRoom chat.id, res.random done
            robot.messageRoom chat.id, 'benvento'
          else if err is 'USER_NOT_MUTUAL_CONTACT'
            res.send 'aah, non posso: ho bisogno del tuo contatto'
          else
            res.send "non sono riuscito, c'è un errore: #{reply[0]}"