class BudgetItemsController < InheritedResources::Base
  load_and_authorize_resource
  respond_to :html, :json

  before_filter :get_statistics, :only => [:index]
  layout 'application', :except => [:edit, :update, :create]

  def index
    @new_budget_item = BudgetItem.new
    super
  end

  def create
    create! do |format|
      if @budget_item.errors.empty?
        format.html do
          render :show
        end
      end
    end
  end

  def update
    update! do |format|
      if @budget_item.errors.empty?
        format.html { render :show }
      end
    end
  end

protected

  def begin_of_association_chain
    current_user
  end

  def get_statistics
    @statistics = {
      :total_budget => current_user.budget_items.sum(:max_price),
      :spendings    => current_user.budget_items.sum(:real_price),
      :overhead     => current_user.budget_items.sum(:real_price) - current_user.budget_items.sum(:max_price)
    }
  end
end