# -*- coding: utf-8 -*-
require 'cinch'
require 'cinch-storage'
require 'cinch/toolbox'
require 'time-lord'

module Cinch::Plugins
  # Plugin to track Google Hangout links
  class Hangouts
    include Cinch::Plugin
    @@hangout_filename = ''
    @@subscription_filename = ''

    attr_accessor :storage

    self.help = 'Use .hangouts to see the info for any recent hangouts. You ' +
                'can also use .hangouts subscribe to sign up for notifications'

    match /hangouts\z/,           method: :list_hangouts
    match /hangouts subscribe/,   method: :subscribe
    match /hangouts unsubscribe/, method: :unsubscribe

    listen_to :channel

    # This is the regex that captures hangout links
    # The regex will need to be updated if the url scheme changes in the future
    HANGOUTS_REGEX = %r(plus\.google\.com/hangouts/_/([a-z0-9]{10,40})(\?|$))

    def initialize(*args)
      super
      @@subscription_filename = config[:subscription_filename] ||
                                'yaml/hangout_subscriptions.yml'
      @@hangout_filename = config[:hangout_filename] ||
                           'yaml/hangouts.yml'

      @expire = config[:expire_period] || 120
      @response_type = config[:response_type] || :notice
    end

    def listen(m)
      hangout_id = m.message[HANGOUTS_REGEX, 1]
      process_hangout(hangout_id, m) if hangout_id
    end

    def process_hangout(hangout_id, m)
      if Hangout.find_by_id(hangout_id)
        # If it's an old hangout capture a new expiration time
        hangout.time = Time.now
        hangout.save
      else
        hangout = Hangout.new(m.user.nick, hangout_id, Time.now)
        hangout.save
        Subscription.notify(hangout_id, @bot)
      end
    end

    def subscribe(m)
      nick = m.user.nick
      if Subscription.for_user(nick)
        msg = 'You are already subscribed. '
      else
        sub = Subscription.new(nick)
        sub.save
        msg = 'You are now subscribed.' +
              'I will let you know when a hangout is linked. '
      end
      m.user.notice msg + 'To unsubscribe use `.hangouts unsubscribe`.'
    end

    def unsubscribe(m)
      nick = m.user.nick
      if Subscription.for_user(nick)
        Subscription.for_user(nick).delete
        msg = 'You are now unsubscribed, and will no ' +
              'longer receive a messages. '
      else
        msg = 'You are not subscribed. '
      end
      m.user.notice msg + 'To subscribe use `.hangouts subscribe`.'
    end

    def list_hangouts(m)
      Hangout.delete_expired(@expire)
      hangouts = Hangout.sorted
      m.user.notice 'No hangouts have been linked recently!' if hangouts.empty?

      m.user.notice 'These hangouts have been linked in the last ' +
                    "#{@expire} minutes. They may or may not still be going."
      hangouts.each do |hangout|
        m.user.notice "#{hangout.nick} started a hangout at " +
                      Hangout.url(hangout.id) +
                      " it was last linked #{hangout.time.ago.to_words}"
      end
    end

    def respond(m, message)
      case @response_type
      when :notice
        m.user.notice message
      when :pm
        m.user.send message
      end
    end
  end
end