class AdminPublicBodyHeadingsController < AdminController

    def new
        @heading = PublicBodyHeading.new
        @heading.build_all_translations
    end

    def create
        I18n.with_locale(I18n.default_locale) do
            @heading = PublicBodyHeading.new(params[:public_body_heading])
            if @heading.save
                flash[:notice] = 'Heading was successfully created.'
                redirect_to admin_categories_url
            else
                @heading.build_all_translations
                render :action => 'new'
            end
        end
    end

    def edit
        @heading = PublicBodyHeading.find(params[:id])
        @heading.build_all_translations
    end

    def update
        @heading = PublicBodyHeading.find(params[:id])

        I18n.with_locale(I18n.default_locale) do
            if @heading.update_attributes(params[:public_body_heading])
                flash[:notice] = 'Heading was successfully updated.'
                redirect_to edit_admin_heading_path(@heading)
            else
                @heading.build_all_translations
                render :action => 'edit'
            end
        end
    end

    def destroy
        @locale = self.locale_from_params
        I18n.with_locale(@locale) do
            heading = PublicBodyHeading.find(params[:id])
            heading.destroy
            flash[:notice] = "Heading was successfully destroyed."
            redirect_to admin_categories_url
        end
    end

    def reorder
        transaction = reorder_headings(params[:headings])
        if transaction[:success]
            render :nothing => true, :status => :ok
        else
            render :text => transaction[:error], :status => :unprocessable_entity
        end
    end

    def reorder_categories
        transaction = reorder_categories_for_heading(params[:id], params[:categories])
        if transaction[:success]
            render :nothing => true, :status => :ok and return
        else
            render :text => transaction[:error], :status => :unprocessable_entity
        end
    end

    protected

    def reorder_headings(headings)
        error = nil
        ActiveRecord::Base.transaction do
            headings.each_with_index do |heading_id, index|
                begin
                    heading = PublicBodyHeading.find(heading_id)
                rescue ActiveRecord::RecordNotFound => e
                    error = e.message
                    raise ActiveRecord::Rollback
                end
                heading.display_order = index
                unless heading.save
                    error = heading.errors.full_messages.join(",")
                    raise ActiveRecord::Rollback
                end
            end
        end
        { :success => error.nil? ? true : false, :error => error }
    end

    def reorder_categories_for_heading(heading_id, categories)
        error = nil
        ActiveRecord::Base.transaction do
            categories.each_with_index do |category_id, index|
                conditions = { :public_body_category_id => category_id,
                               :public_body_heading_id => heading_id }
                link = PublicBodyCategoryLink.where(conditions).first
                unless link
                    error = "Couldn't find PublicBodyCategoryLink for category #{category_id}, heading #{heading_id}"
                    raise ActiveRecord::Rollback
                end
                link.category_display_order = index
                unless link.save
                    error = link.errors.full_messages.join(",")
                    raise ActiveRecord::Rollback
                end
            end
        end
        { :success => error.nil? ? true : false, :error => error }
    end

end