class CoursesController < ApplicationController
  include CoursesHelper

  menu_item l(:label_sort_by_time), :only => :index
  menu_item l(:label_sort_by_active), :only => :index
  menu_item l(:label_sort_by_influence), :only => :index

  before_filter :authorize, :only => [:show, :settings, :edit, :update, :modules, :close, :reopen, :view_homework_attaches, :course]
  #before_filter :authorize_global, :only => [:view_homework_attaches, :new,:create]
  before_filter :require_admin, :only => [:copy, :archive, :unarchive, :destroy, :calendar]

  before_filter :require_login, :only => [:join, :unjoin]
  before_filter :allow_join, :only => [:join]


  def join
    if User.current.logged?
      course = Project.find(params[:object_id])
      course_prefs = Course.find_by_extra(course.identifier)
      if params[:course_password] == course_prefs.password
        members = []
        members << Member.new(:role_ids => [10], :user_id => User.current.id)
        course.members << members

        StudentsForCourse.create(:student_id => User.current.id, :course_id => params[:object_id])
        @state = 0
      else
        @state = 1
      end
    end
    respond_to do |format|
      # format.html { redirect_to_referer_or {render :text => (watching ? 'Watcher added.' : 'Watcher removed.'), :layout => true}}
      format.js { render :partial => 'set_join', :locals => {:user => User.current, :course => Project.find(params[:object_id]), :object_id => params[:object_id]} }
    end
  end

  def unjoin
    if User.current.logged?

      @member = Member.where('project_id = ? and user_id = ?', params[:object_id], User.current.id)
      @member.first.destroy

      joined = StudentsForCourse.where('student_id = ? and course_id = ?', User.current.id, params[:object_id])
      joined.each do |join|
        join.delete
      end
    end
    respond_to do |format|
      # format.html { redirect_to_referer_or {render :text => (watching ? 'Watcher added.' : 'Watcher removed.'), :layout => true}}
      format.js { render :partial => 'set_join', :locals => {:user => User.current, :course => Project.find(params[:object_id]), :object_id => params[:object_id]} }
    end
  end

  def handle_course courses, activities
    course_activity_count_array=activities.values()

    course_array=[]
    i=0;
    courses.each do |course|
      course_array[i]=course
      i=i+1
    end

    courses=desc_sort_course_by_avtivity(course_activity_count_array, course_array)

    return courses
  end

  def settings
    @issue_custom_fields = IssueCustomField.sorted.all
    @issue_category ||= IssueCategory.new
    @member ||= @courses.members.new
    @trackers = Tracker.sorted.all
    end

  def create
    if User.current.user_extensions.identity
      @course = Course.new
      @course.extra='course' + DateTime.parse(Time.now.to_s).strftime('%Y-%m-%d_%H-%M-%S').to_s
      @course.safe_attributes = params[:course]
      @course.tea_id = User.current.id
      # added by bai
      @course.term = params[:term]
      @course.time = params[:time]
      #@course.school_id = params[:occupation]
      @course.school_id = User.current.user_extensions.school_id
      @course.setup_time = params[:setup_time]
      @course.endup_time = params[:endup_time]
      @course.class_period = params[:class_period]
      @course.description = params[:description]
    end

    @issue_custom_fields = IssueCustomField.sorted.all
    @trackers = Tracker.sorted.all

    if User.current.user_extensions.identity == 0
      if  @course.save
        unless User.current.admin?
          r = Role.givable.find_by_id(Setting.new_project_user_role_id.to_i) || Role.givable.first
          m = Member.new(:user => User.current, :roles => [r])
          #course = ProjectInfo.new(:user_id => User.current.id, :course_id => @course.id)
          #user_grades = UserGrade.create(:user_id => User.current.id, :course_id => @course.id)
          if params[:course][:is_public] == '1'
            course_status = CourseStatus.create(:course_id => @course.id, :watchers_count => 0, :changesets_count => 0, :grade => 0, :course_type => @course_tag)
          end
          @course.members << m
          #@course.course_infos << course
        end
        respond_to do |format|
          format.html {
            flash[:notice] = l(:notice_successful_create)
            if params[:continue]
              redirect_to new_course_path(attrs, :course => '0')
            elsif params[:course_continue]
              redirect_to new_course_path(:course => '1')
            else
              redirect_to settings_course_path(@course, :course_type => 1)
            end
          }
          format.api { render :action => 'show', :status => :created, :location => url_for(:controller => 'courses', :action => 'show', :id => @course.id) }
        end
      else
        @course.destroy
        respond_to do |format|
          format.html { render :action => 'new', :layout => 'base' } #Added by young
          format.api { render_validation_errors(@course) }
        end
      end
    end

  end


  def new
    @course_type = params[:course_type] ||= params[:course]
    @issue_custom_fields = IssueCustomField.sorted.all
    @trackers = Tracker.sorted.all

    @course = Course.new
    @course.safe_attributes = params[:course]

    render :layout => 'base'
  end


  def desc_sort_course_by_avtivity(activity_count, courses)
    return courses if activity_count.size<2
    (activity_count.size-2).downto(0) do |i|
      (0..i).each do |j|
        if activity_count[j]<activity_count[j+1]
          courses[j], courses[j+1]=courses[j+1], courses[j]
          activity_count[j], activity_count[j+1]=activity_count[j+1], activity_count[j]
        end
      end
    end
    return courses
  end

  def index
    @course_type = params[:course_type]
    @school_id = params[:school_id]
    per_page_option = 10


    if @school_id == "0" or @school_id.nil?
      @courses_all = Course.active.visible.
          joins("LEFT JOIN #{CourseStatus.table_name} ON #{Course.table_name}.id = #{CourseStatus.table_name}.course_id")
    else
      @courses_all = Course.active.visible.
          joins("LEFT JOIN #{CourseStatus.table_name} ON #{Course.table_name}.id = #{CourseStatus.table_name}.course_id").
          joins(:course_extra).
          where("#{Course.table_name}.course_type = ?  AND #{Course.table_name}.school_id = ?", Course::CourseType_course, @school_id)
    end

    @course_count = @courses_all.count
    @course_pages = Paginator.new @course_count, per_page_option, params['page']

    #gcm activity count

    @course_activity_count=Hash.new
    #count initialize
    @courses_all.each do |course|
      @course_activity_count[course.id]=0
    end

    #@course_activity_count=get_course_activity @courses_all,@course_activity_count
    #gcm end


    case params[:course_sort_type]
      when '0'
        @courses = @courses_all.order("created_at desc")
        @s_type = 0
        @courses = @courses.offset(@course_pages.offset).limit(@course_pages.per_page)

        #gcm
        @course_activity_count=get_course_activity @courses, @course_activity_count
      #gcmend

      when '1'
        @courses = @courses_all.order("course_ac_para desc")
        @s_type = 1
        @courses = @courses.offset(@course_pages.offset).limit(@course_pages.per_page)

        #gcm
        @course_activity_count=get_course_activity @courses, @course_activity_count
      #gcmend

      when '2'
        @courses = @courses_all.order("watchers_count desc")
        @s_type = 2
        @courses = @courses.offset(@course_pages.offset).limit(@course_pages.per_page)

        #gcm
        @course_activity_count=get_course_activity @courses, @course_activity_count
      #gcmend

      #gcm
      when '3'

        #gcm
        @course_activity_count=get_course_activity @courses_all, @course_activity_count
        #gcmend

        @courses=handle_course @courses_all, @course_activity_count
        @s_type = 3
        @courses = @courses[@course_pages.offset, @course_pages.per_page]
      else
        @s_type = 0
        @courses = @courses_all.order("created_at desc")
        @courses = @courses.offset(@course_pages.offset).limit(@course_pages.per_page)

        #gcm
        @course_activity_count=get_course_activity @courses, @course_activity_count
      #gcmend

    end

    respond_to do |format|
      format.html {
        render :layout => 'base'
      }
      format.atom {
        courses = Course.visible.order('created_on DESC').limit(Setting.feeds_limit.to_i).all
        render_feed(courses, :title => "#{Setting.app_title}: #{l(:label_course_latest)}")
      }
    end
  end


  def get_course_activity courses, activities
    @course_ids=activities.keys()

    days = Setting.activity_days_default.to_i
    date_to ||= Date.today + 1
    date_from = date_to - days-1.years

    #file_count
    Attachment.where(container_id: @course_ids, container_type: Project).where("created_on>?", date_from).each do |attachment|
      activities[attachment.container_id]+=1
    end

    #message_count
    Board.where(course_id: @course_ids).each do |board|
#      activities[board.course_id]+=1
      activities[board.course_id]+=board.messages.where("updated_on>?", date_from).count
    end

    #feedbackc_count
    JournalsForMessage.where(jour_id: @course_ids, jour_type: Project).each do |jourformess|
      activities[jourformess.jour_id]+=1
    end

    #activities!=0
    i=0;
    courses.each do |course|
      id=course.id
      if activities[id]==0
        activities[id]=1
      end
    end

    return activities
  end

  private

  def allow_join
    if course_endTime_timeout? Project.find(params[:object_id])
      respond_to do |format|
        format.js {
          @state = 2
          render :partial => 'set_join',
                 :locals => {:user => User.current,
                             :course => Project.find(params[:object_id]),
                             :object_id => params[:object_id]
                 }
        }
      end
    end
  end


  def index1

    per_page_option = 10

    #当前所有的活动课程
    @courses_all = Course.active.visible.
        joins("LEFT JOIN #{CourseStatus.table_name} ON #{Course.table_name}.id = #{CourseStatus.table_name}.couse_id")

    @course_count = @courses_all.count
    @course_pages = Paginator.new @course_count, per_page_option, params['page']

#gcm activity count

    @course_activity_count=Hash.new

    @courses_all.each do |course|
      @course_activity_count[course.id]=0
    end

    @course_activity_count=get_course_activity @courses_all, @course_activity_count

#gcm end

    case params[:course_sort_type]
      when '0'
        @courses = @courses_all.order("created_on desc")
        @s_type = 0
      when '1'
        @courses = @courses_all.order("grade desc")
        @s_type = 1
      when '2'
        @courses = @courses_all.order("watchers_count desc")
        @s_type = 2

      #gcm
      when '3'
        #@courses=desc_sort_course_by_avtivity(@course_activity_count_array,@course_all_array)
        @courses=handle_course @courses_all, @course_activity_count
        @s_type = 3
        @courses = @courses[@course_pages.offset, @course_pages.per_page]

      else
        @courses = @courses = @courses_all.order("grade desc")
        @s_type = 1
    end
    @courses = @courses.offset(@course_pages.offset).limit(@course_pages.per_page)

    respond_to do |format|
      format.html {
        render :layout => 'base'
        # scope = Project
        # unless params[:closed]
        # scope = scope.active
        # end
      }
      format.api {
        #        @offset, @limit = api_offset_and_limit
        #        @course_count = Project.visible.count
        #        @courses = Project.visible.offset(@offset).limit(@limit).order('lft').all
      }
      format.atom {
        courses = Project.visible.order('created_on DESC').limit(Setting.feeds_limit.to_i).all
        render_feed(courses, :title => "#{Setting.app_title}: #{l(:label_course_latest)}")
      }
    end
  end


end