# encoding: utf-8
class ArticlesController < ApplicationController
  before_filter :authenticate_article_meta, :find_supplier

  def index
    if params['sort']
      sort = case params['sort']
               when "name"  then "articles.name"
               when "unit"   then "articles.unit"
               when "article_category" then "article_categories.name"
               when "note"   then "articles.note"
               when "availability" then "articles.availability"
               when "name_reverse"  then "articles.name DESC"
               when "unit_reverse"   then "articles.unit DESC"
               when "article_category_reverse" then "article_categories.name DESC"
               when "note_reverse" then "articles.note DESC"
               when "availability_reverse" then "articles.availability DESC"
               end
    else
      sort = "article_categories.name, articles.name"
    end

    @articles = Article.undeleted.where(supplier_id: @supplier, :type => nil).includes(:article_category).order(sort)
    @articles = @articles.where('articles.name LIKE ?', "%#{params[:query]}%") unless params[:query].nil?

    @articles = @articles.page(params[:page]).per(@per_page)

    respond_to do |format|
      format.html
      format.js { render :layout => false }
    end
  end

  def new
    @article = @supplier.articles.build(:tax => FoodsoftConfig[:tax_default])
    render :layout => false
  end

  def create
    @article = Article.new(params[:article])
    if @article.valid? && @article.save
      render :layout => false
    else
      render :action => 'new', :layout => false
    end
  end

  def edit
    @article = Article.find(params[:id])
    render :action => 'new', :layout => false
  end

  # Updates one Article and highlights the line if succeded
  def update
    @article = Article.find(params[:id])

    if @article.update_attributes(params[:article])
      render :layout => false
    else
      render :action => 'new', :layout => false
    end
  end

  # Deletes article from database. send error msg, if article is used in a current order
  def destroy
    @article = Article.find(params[:id])
    @article.mark_as_deleted unless @order = @article.in_open_order # If article is in an active Order, the Order will be returned
    render :layout => false
  end

  # Renders a form for editing all articles from a supplier
  def edit_all
    @articles = @supplier.articles.undeleted
  end

  # Updates all article of specific supplier
  def update_all
    invalid_articles = false

    begin
      Article.transaction do
        unless params[:articles].blank?
          # Update other article attributes...
          @articles = Article.find(params[:articles].keys)
          @articles.each do |article|
            unless article.update_attributes(params[:articles][article.id.to_s])
              invalid_articles = true unless invalid_articles # Remember that there are validation errors
            end
          end

          raise ActiveRecord::Rollback  if invalid_articles # Rollback all changes
        end
      end
    end

    if invalid_articles
      # An error has occurred, transaction has been rolled back.
      flash.now.alert = I18n.t('articles.controller.error_invalid')
      render :edit_all
    else
      # Successfully done.
      redirect_to supplier_articles_path(@supplier), notice: I18n.t('articles.controller.update_all.notice')
    end
  end

  # makes different actions on selected articles
  def update_selected
    raise I18n.t('articles.controller.error_nosel') if params[:selected_articles].nil?
    articles = Article.find(params[:selected_articles])
    Article.transaction do
      case params[:selected_action]
        when 'destroy'
          articles.each(&:mark_as_deleted)
          flash[:notice] = I18n.t('articles.controller.update_sel.notice_destroy')
        when 'setNotAvailable'
          articles.each {|a| a.update_attribute(:availability, false) }
          flash[:notice] = I18n.t('articles.controller.update_sel.notice_unavail')
        when 'setAvailable'
          articles.each {|a| a.update_attribute(:availability, true) }
          flash[:notice] = I18n.t('articles.controller.update_sel.notice_avail')
        else
          flash[:alert] = I18n.t('articles.controller.update_sel.notice_noaction')
      end
    end
    # action succeded
    redirect_to supplier_articles_url(@supplier, :per_page => params[:per_page])

  rescue => error
    redirect_to supplier_articles_url(@supplier, :per_page => params[:per_page]),
                :alert => I18n.t('errors.general_msg', :msg => error)
  end

  # lets start with parsing articles from uploaded file, yeah
  # Renders the upload form
  def upload
  end

  # Update articles from a spreadsheet
  def parse_upload
    uploaded_file = params[:articles]['file']
    options = {filename: uploaded_file.original_filename}
    @updated_article_pairs, @outlisted_articles, @new_articles = [], [], []
    FoodsoftFile::parse uploaded_file.tempfile, options do |status, new_attrs, line|
      article = @supplier.articles.where(order_number: new_attrs[:order_number]).first
      new_attrs[:article_category] = ArticleCategory.find_match(new_attrs[:article_category])
      new_attrs[:tax] ||= FoodsoftConfig[:tax_default]
      new_article = @supplier.articles.build(new_attrs)

      if status.nil? && article.nil?
        @new_articles << new_article
      elsif status.nil? && article.present?
        unequal_attributes = article.unequal_attributes(new_article)
        article.attributes = unequal_attributes
        @updated_article_pairs << [article, unequal_attributes]
      elsif status == :outlisted && article.present?
        @outlisted_articles << article

      # stop when there is a parsing error
      elsif status.is_a? String
        raise I18n.t('articles.controller.error_parse', :msg => status, :line => line.to_s)
      end

    end
    @ignored_article_count = 0
    render :sync
  rescue => error
    redirect_to upload_supplier_articles_path(@supplier), :alert => I18n.t('errors.general_msg', :msg => error.message)
  end

  # sync all articles with the external database
  # renders a form with articles, which should be updated
  def sync
    # check if there is an shared_supplier
    unless @supplier.shared_supplier
      redirect_to supplier_articles_url(@supplier), :alert => I18n.t('articles.controller.sync.shared_alert', :supplier => @supplier.name)
    end
    # sync articles against external database
    @updated_article_pairs, @outlisted_articles, @new_articles = @supplier.sync_all
    if @updated_article_pairs.empty? && @outlisted_articles.empty? && @new_articles.empty?
      redirect_to supplier_articles_path(@supplier), :notice => I18n.t('articles.controller.sync.notice')
    end
    @ignored_article_count = @supplier.articles.where(order_number: [nil, '']).count
  end

  # Updates, deletes articles when upload or sync form is submitted
  def update_synchronized
    begin
      Article.transaction do
        # delete articles
        if params[:outlisted_articles]
          Article.find(params[:outlisted_articles].keys).each(&:mark_as_deleted)
        end

        # Update articles
        if params[:articles]
          params[:articles].each do |id, attrs|
            Article.find(id).update_attributes! attrs
          end
        end

        # Add new articles
        if params[:new_articles]
          params[:new_articles].each do |attrs|
            article = Article.new attrs
            article.supplier = @supplier
            article.availability = true if @supplier.shared_sync_method == 'all_available'
            article.availability = false if @supplier.shared_sync_method == 'all_unavailable'
            article.save!
          end
        end
      end

      # Successfully done.
      redirect_to supplier_articles_path(@supplier), notice: I18n.t('articles.controller.update_sync.notice')

    rescue ActiveRecord::RecordInvalid => invalid
      # An error has occurred, transaction has been rolled back.
      redirect_to supplier_articles_path(@supplier),
                  alert: I18n.t('articles.controller.error_update', :article => invalid.record.name, :msg => invalid.record.errors.full_messages)

    rescue => error
      redirect_to supplier_articles_path(@supplier),
                  alert: I18n.t('errors.general_msg', :msg => error.message)
    end
  end

  # renders a view to import articles in local database
  #
  def shared
    # build array of keywords, required for ransack _all suffix
    params[:q][:name_cont_all] = params[:q][:name_cont_all].split(' ') if params[:q]
    # Build search with meta search plugin
    @search = @supplier.shared_supplier.shared_articles.search(params[:q])
    @articles = @search.result.page(params[:page]).per(10)
    render :layout => false
  end

  # fills a form whith values of the selected shared_article
  # when the direct parameter is set and the article is valid, it is imported directly
  def import
    @article = SharedArticle.find(params[:shared_article_id]).build_new_article(@supplier)
    @article.article_category_id = params[:article_category_id] unless params[:article_category_id].blank?
    if params[:direct] && !params[:article_category_id].blank? && @article.valid? && @article.save
      render :action => 'create', :layout => false
    else
      render :action => 'new', :layout => false
    end
  end
end