# Controller for all ordering-actions that are performed by a user who is member of an Ordergroup.
# Management actions that require the "orders" role are handled by the OrdersController.
class OrderingController < ApplicationController
  # Security
  before_filter :ensure_ordergroup_member
  before_filter :ensure_open_order, :only => [:new, :create, :edit, :update, :order, :stock_order, :saveOrder]

  # Index page.
  def index
  end

  def new
    @group_order = @order.group_orders.build(:ordergroup => @ordergroup, :updated_by => current_user)
    @ordering_data = @group_order.load_data
  end

  def create
    @group_order = GroupOrder.new(params[:group_order])
    begin
      @group_order.save_ordering!
      redirect_to group_order_url(@group_order), :notice => 'Die Bestellung wurde gespeichert.'
    rescue ActiveRecord::StaleObjectError
      redirect_to group_orders_url, :alert => 'In der Zwischenzeit hat jemand anderes auch bestellt, daher konnte die Bestellung nicht aktualisiert werden.'
    rescue => exception
      logger.error('Failed to update order: ' + exception.message)
      redirect_to group_orders_url, :alert => 'Die Bestellung konnte nicht aktualisiert werden, da ein Fehler auftrat.'
    end
  end

  def show
    @group_order = GroupOrder.find(params[:id])
    @order= @group_order.order
  end

  def edit
    @group_order = GroupOrder.find(params[:id])
    @ordering_data = @group_order.load_data
  end

  def update
    @group_order = GroupOrder.find(params[:id])
    @group_order.attributes = params[:group_order]
    begin
      @group_order.save_ordering!
      redirect_to group_order_url(@group_order), :notice => 'Die Bestellung wurde gespeichert.'
    rescue ActiveRecord::StaleObjectError
      redirect_to group_orders_url, :alert => 'In der Zwischenzeit hat jemand anderes auch bestellt, daher konnte die Bestellung nicht aktualisiert werden.'
    rescue => exception
      logger.error('Failed to update order: ' + exception.message)
      redirect_to group_orders_url, :alert => 'Die Bestellung konnte nicht aktualisiert werden, da ein Fehler auftrat.'
    end
  end

  def stock_order
    # Load order article data...
    @articles_grouped_by_category = @order.articles_grouped_by_category
    # save results of earlier orders in array
    ordered_articles = Array.new
    @group_order = @order.group_orders.find(:first,
                                            :conditions => "ordergroup_id = #{@ordergroup.id}", :include => :group_order_articles)

    if @group_order
      # Group has already ordered, so get the results...
      for goa in @group_order.group_order_articles
        ordered_articles[goa.order_article_id] = {:quantity => goa.quantity,
                                                  :tolerance => goa.tolerance,
                                                  :quantity_result => goa.result(:quantity),
                                                  :tolerance_result => goa.result(:tolerance)}
      end
      @version = @group_order.lock_version
      @availableFunds = @ordergroup.get_available_funds(@group_order)
    else
      @version = 0
      @availableFunds = @ordergroup.get_available_funds
    end

    # load prices ....
    @price = Array.new; @quantity_available = Array.new
    @others_quantity = Array.new; @quantity = Array.new; @quantity_result = Array.new; @used_quantity = Array.new; @unused_quantity = Array.new
    i = 0;
    @articles_grouped_by_category.each do |category_name, order_articles|
      for order_article in order_articles
        # price/unit size
        @price[i] = order_article.article.fc_price
        @quantity_available[i] = order_article.article.quantity_available(@order)
        # quantity
        @quantity[i] = (ordered_articles[order_article.id] ? ordered_articles[order_article.id][:quantity] : 0)
        @others_quantity[i] = order_article.quantity - @quantity[i]
        @used_quantity[i] = (ordered_articles[order_article.id] ? ordered_articles[order_article.id][:quantity_result] : 0)
        i += 1
      end
    end
  end

  # Shows all Orders of the Ordergroup
  # if selected, it shows all orders of the foodcoop
  def archive
    # get only orders belonging to the ordergroup
    @closed_orders = Order.paginate :page => params[:page], :per_page => 10,
                                    :conditions => { :state => 'closed' }, :order => "orders.ends DESC"

    respond_to do |format|
      format.html # myOrders.haml
      format.js { render :partial => "orders", :locals => {:orders => @closed_orders, :pagination => true} }
    end
  end

  # adds a Comment to the Order
  def add_comment
    order = Order.find(params[:id])
    comment = order.comments.build(params[:comment])
    comment.user = @current_user
    if !comment.text.blank? and comment.save
      flash[:notice] = "Kommentar wurde erstellt."
    else
      flash[:error] = "Kommentar konnte nicht erstellt werden. Leerer Kommentar?"
    end
    redirect_to :action => 'show', :id => order
  end

  private

  # Returns true if @current_user is member of an Ordergroup.
  # Used as a :before_filter by OrderingController.
  def ensure_ordergroup_member
    @ordergroup = @current_user.ordergroup
    if @ordergroup.nil?
      redirect_to root_url, :alert => "Du bist kein Mitglieder einer Bestellgruppe."
    end
  end

  def ensure_open_order
    @order = Order.find((params[:order_id] || params[:group_order][:order_id]),
                        :include => [:supplier, :order_articles])
    unless @order.open?
      flash[:notice] = 'Diese Bestellung ist bereits abgeschlossen.'
      redirect_to :action => 'index'
    end
  end

end