class Softkey < ActiveRecord::Base
  attr_accessible :softkey_function_id, :number, :label, :uuid, :softkeyable_type, :softkeyable_id, :call_forward, :blf

  belongs_to :sip_account
  belongs_to :softkey_function
  belongs_to :softkeyable, :polymorphic => true

  # These functions need a number to act.
  #
  validates_presence_of :number, :if => Proc.new{ |softkey| self.softkey_function_id != nil &&  
                                                            ['blf', 'speed_dial','dtmf','conference'].include?(softkey.softkey_function.name) }

  validates_presence_of :softkeyable_id, :if => Proc.new{ |softkey| self.softkey_function_id != nil && 
                                                                     ['call_forwarding'].include?(softkey.softkey_function.name) }

  validates_presence_of :uuid
  validates_uniqueness_of :uuid

  acts_as_list :scope => :sip_account

  before_validation :clean_up_and_leave_only_values_which_make_sense_for_the_current_softkey_function_id
  after_save :resync_phone
  after_destroy :resync_phone

  def possible_call_forwards
    call_forwards = self.sip_account.call_forwards
    self.sip_account.phone_numbers.each do |phone_number|
      call_forwards = call_forwards + phone_number.call_forwards
    end

    phone_numbers_ids = self.sip_account.phone_number_ids
    phone_numbers = PhoneNumber.where(:id => phone_numbers_ids).pluck(:number)

    hunt_group_ids = PhoneNumber.where(:phone_numberable_type => 'HuntGroupMember', :number => phone_numbers).
                                 map{ |phone_number| phone_number.phone_numberable.hunt_group.id }.
                                 uniq

    call_forwards = call_forwards + CallForward.where(:destinationable_type => 'HuntGroup', :destinationable_id => hunt_group_ids, :call_forwardable_type => 'PhoneNumber').
                                where('call_forwardable_id NOT IN (?)', phone_numbers_ids)

    return call_forwards
  end

  def possible_blf_sip_accounts
    self.sip_account.target_sip_accounts_by_permission(:presence)
  end

  def possible_pickup_groups
    Group.where(:id => self.sip_account.target_group_ids_by_permission(:presence))
  end

  def possible_blf
    blf = possible_pickup_groups.collect{ |g| ["#{g.class.name}: #{g.to_s}", "#{g.id}:#{g.class.name}"] }
    blf + possible_blf_sip_accounts.collect{ |g| ["#{g.class.name}: #{g.to_s}", "#{g.id}:#{g.class.name}"] }
  end

  def to_s
    if self.softkeyable.blank?
      if ['log_out', 'log_in'].include?(self.softkey_function.name)
        I18n.t("softkeys.functions.#{self.softkey_function.name}")        
      else
        "#{self.softkey_function.name} : #{self.number.to_s}"
      end
    else
      "#{self.softkeyable}"
    end
  end

  def resync_phone
    phone_sip_account = PhoneSipAccount.find_by_sip_account_id(self.sip_account_id)
    if phone_sip_account && phone_sip_account.phone
      phone_sip_account.phone.resync()
    end
  end

  def move_up?
    return self.position.to_i > Softkey.where(:sip_account_id => self.sip_account_id ).order(:position).first.position.to_i
  end

  def move_down?
    return self.position.to_i < Softkey.where(:sip_account_id => self.sip_account_id ).order(:position).last.position.to_i
  end


  private
  # Make sure that no number is set when there is no need for one.
  # And make sure that there is no CallForward connected when not needed.
  #
  def clean_up_and_leave_only_values_which_make_sense_for_the_current_softkey_function_id
    if self.softkey_function_id != nil
      case self.softkey_function.name
      when 'blf'
        has_permission = false
        self.softkeyable = PhoneNumber.where(:number => self.number, :phone_numberable_type => 'SipAccount').first.try(:phone_numberable)
        if self.softkeyable
          self.sip_account.groups.each do |group|
            if group.has_permission(self.softkeyable.class.name, self.softkeyable.id, :presence)
              has_permission = true
              break
            end
          end
          if !has_permission && self.sip_account.sip_accountable
            self.sip_account.sip_accountable.groups.each do |group|
              if group.has_permission(self.softkeyable.class.name, self.softkeyable.id, :presence)
                has_permission = true
                break
              end
            end
          end
        end

        if !has_permission
          self.softkeyable = nil
          self.number = nil
        end
      when 'conference'
        self.softkeyable = PhoneNumber.where(:number => self.number, :phone_numberable_type => 'Conference').first.try(:phone_numberable)
      when 'call_forwarding'
        self.softkeyable = CallForward.where(:id => self.softkeyable_id).first
        self.number = nil
      else
        self.softkeyable_id = nil
        self.softkeyable_type = nil  
      end
    end
  end

end