class Admin::DashboardsController < ApplicationController
  include OrbitBackendHelper
  before_action :check_backend_openness
  layout "basic_back_end"

  def index
    apps = ['bulletin', 'page_context', 'web_link']
    @module_app_contents, @module_app_contents_total = get_module_app_count(apps)
    @recent_updated = get_recently_updated(apps)
    @most_visited = get_most_visited(apps)
    render_401 and return if !current_user.is_approved? rescue false
  end

  def get_cpu_usage
    @usw = Usagewatch
    render :js => @usw.uw_cpuused.to_s
  end

  def get_mem_usage
    @usw = Usagewatch
    render :js => @usw.uw_memused.to_s
  end

  def get_disk_usage
    render :json => `df -m /home`.scan(/\d+%/).first.gsub('%','') rescue '0'
  end

  protected

  def get_module_app_count(args)
    a = {}
    total = 0
    args.each do |module_app|
      module_app_class = module_app.classify.constantize rescue nil
      if !module_app_class.nil?
        count = module_app_class.count
        a.merge!(module_app => count)
        total += count
      end
    end
    [Kaminari.paginate_array(a.sort {|a,b| b[1]<=>a[1]}).page(params[:page]).per(5), total]
  end

  def get_recently_updated(args)
    a = {}
    args.each do |module_app|
      module_app_class = module_app.classify.constantize rescue nil
      if !module_app_class.nil?
        objects = module_app_class.order_by([:updated_at, :desc]).limit(20)
        objects.each do |object|
          a.merge!(object => object.updated_at) unless (object.archived rescue nil)
        end
      end
    end
    sorted_objects = a.sort {|a,b| b[1]<=>a[1]}
    sorted_objects[0..19]
    Kaminari.paginate_array(sorted_objects).page(params[:page]).per(5)
  end

  def get_most_visited(args)
    a = {}
    args.each do |module_app|
      module_app_class = module_app.classify.constantize rescue nil
      if !module_app_class.nil?
        objects = module_app_class.order_by([:view_count, :desc]).limit(20)
        objects.each do |object|
          a.merge!(object => object.view_count) if object.view_count > 0 && (!object.archived rescue true)
        end
      end
    end
    sorted_objects = a.sort {|a,b| b[1]<=>a[1]}
    sorted_objects[0..19]
    Kaminari.paginate_array(sorted_objects).page(params[:page]).per(5)
  end
  private

  def check_backend_openness
    if !current_site.backend_openness_on && current_user.blank?
      redirect_to new_session_path
    end
  end

end