module Redmine::MenuManager::TopMenuHelper

  def render_top_menu
    content_tag :ul, :id => "account-nav", :class => "menu_root" do
      render_main_top_menu_nodes +
      render_projects_top_menu_node +
      render_module_top_menu_node +
      render_help_top_menu_node +
      render_user_top_menu_node
    end
  end

  private

  def render_projects_top_menu_node
    return "" if User.current.anonymous? and Setting.login_required?

    projects = Project.visible

    return "" if projects.empty?

    heading = link_to l(:label_project_plural), { :controller => 'projects',
                                                  :action => 'index' },
                                                :title => l(:label_project_plural)

    if User.current.impaired?
      content_tag :li do
        heading
      end
    else
      render_drop_down_menu_node heading do
        content_tag :ul, :style => "display:none" do
          ret = content_tag :li do
            link_to l(:label_project_view_all), :controller => 'projects',
                                                :action => 'index'
          end

          ret += content_tag :li, :id => "project-search-container" do
            render_project_jump_box(projects, @project, :id => 'project-search')
          end

          ret
        end
      end
    end
  end

  def render_user_top_menu_node(items = menu_items_for(:account_menu))
    unless User.current.logged?
      render_drop_down_menu_node(link_to(l(:label_login),
                                         { :controller => 'account',
                                           :action => 'login' },
                                           :class => 'login',
                                           :title => l(:label_login)),
                                 :class => "drop-down last-child") do
        content_tag :ul do
          render :partial => 'account/login'
        end
      end
    else
      render_drop_down_menu_node link_to_user(User.current, :title => User.current.to_s),
                                 items,
                                 :class => "drop-down last-child"
    end
  end

  def render_module_top_menu_node(items = more_top_menu_items)
    render_drop_down_menu_node link_to(l(:label_modules), "#", :title => l(:label_modules)),
                               items,
                               :id => "more-menu"
  end

  def render_help_top_menu_node(item = help_menu_item)
    render_menu_node(item)
  end

  def render_main_top_menu_nodes(items = main_top_menu_items)
    items.collect do |item|
      render_menu_node(item)
    end.join(" ")
  end

  # Menu items for the main top menu
  def main_top_menu_items
    split_top_menu_into_main_or_more_menus[:main]
  end

  # Menu items for the more top menu
  def more_top_menu_items
    split_top_menu_into_main_or_more_menus[:more]
  end

  def help_menu_item
    split_top_menu_into_main_or_more_menus[:help]
  end

  # Split the :top_menu into separate :main and :more items
  def split_top_menu_into_main_or_more_menus
    unless @top_menu_split
      items_for_main_level = []
      items_for_more_level = []
      help_menu = nil
      menu_items_for(:top_menu) do |item|
        if item.name == :home || item.name == :my_page
          items_for_main_level << item
        elsif item.name == :help
          help_menu = item
        elsif item.name == :projects
          # Remove, present in layout
        else
          items_for_more_level << item
        end
      end
      @top_menu_split = {
        :main => items_for_main_level,
        :more => items_for_more_level,
        :help => help_menu
      }
    end
    @top_menu_split
  end

  # Renders the project quick-jump box
  def render_project_jump_box(projects, selected_project, html_options = {})
    if projects.any?
      option_tags = project_tree_options_for_select(projects, :selected => selected_project) do |p|
        {:value => project_path(p, :jump => current_menu_item)}
      end

      html_options = html_options.merge(
        :class    => 'select2-select',
        :onchange => "if (this.value != '') { window.location = this.value; }",
        :title    => l(:label_jump_to_a_project)
      )

      select_tag "", option_tags, html_options
    end
  end
end