class AddDestinationableToCallForward < ActiveRecord::Migration
  def up
    add_column :call_forwards, :destinationable_type, :string
    add_column :call_forwards, :destinationable_id, :integer

    CallForward.all.each do |call_forward|
      phone_number = PhoneNumber.where(:id => call_forward.phone_number_id).first
      if phone_number and phone_number.phone_numberable.class == SipAccount
        account = phone_number.phone_numberable
        result = call_forward.update_attributes(:destinationable_type => call_forward.call_forwardable_type, :destinationable_id => call_forward.call_forwardable_id, :call_forwardable_type => account.class.to_s, :call_forwardable_id => account.id)
      else
        call_forward.update_attributes(:destinationable_type => call_forward.call_forwardable_type, :destinationable_id => call_forward.call_forwardable_id, :call_forwardable_type => 'PhoneNumber', :call_forwardable_id => call_forward.phone_number_id)
      end
    end

    cf_groups = CallForward.order('active DESC').all.group_by{|cf| [cf.call_forwardable_type, cf.call_forwardable_id, cf.call_forward_case_id, cf.destinationable_type, cf.destinationable_id, cf.destination, cf.source]}
    cf_groups.values.each do |duplicates|
      first_item = duplicates.shift
      duplicates.each{|duplicate| duplicate.destroy}
    end

    remove_column :call_forwards, :phone_number_id
  end

  def down
    add_column :call_forwards, :phone_number_id, :integer
    CallForward.where(:call_forwardable_type => 'PhoneNumber').each do |call_forward|
      call_forward.update_attributes(:phone_number_id => call_forward.call_forwardable_id, :call_forwardable_type => call_forward.destinationable_type, :call_forwardable_id => call_forward.destinationable_id)
    end
    remove_column :call_forwards, :destinationable_type
    remove_column :call_forwards, :destinationable_id
  end
end