class ExerciseController < ApplicationController
  layout "base_courses"

  before_filter :find_course, :only => [:index,:new,:create,:student_exercise_list]
  def index
    @is_teacher = User.current.allowed_to?(:as_teacher,@course)
    if @is_teacher
      exercises = @course.exercises
    else
      exercises = @course.exercises.where(:exercise_status => 1)
    end
    @exercises = paginateHelper exercises,20 #分页
    respond_to do |format|
      format.html
    end
  end

  def show

  end

  def new
    @exercise = Exercise.new
    respond_to do |format|
      format.html{render :layout => 'base_courses'}
    end
  end

  def create

  end

  def edit
    respond_to do |format|
      format.html{render :layout => 'base_courses'}
    end
  end

  def update

  end

  def destroy

  end

  #统计结果
  def statistics_result

  end

  def student_exercise_list
    @is_teacher = User.current.allowed_to?(:as_teacher,@course) || User.current.admin?
    @exercise = Exercise.find params[:id]
    @all_exercises = @course.exercises.order("created_at desc")
    @exercise_count = @exercise.exercise_users.where('score is not NULL').count
    if @is_teacher || (!@exercise.exercise_users.where(:user_id => User.current.id).empty? && Time.parse(@exercise.end_time.to_s).strftime("%Y-%m-%d-%H-%M-%S") <= Time.now.strftime("%Y-%m-%d-%H-%M-%S"))
      @exercise_users_list = @exercise.exercise_users.where('score is not NULL')
      @show_all = true;
    elsif !@exercise.exercise_users.where(:user_id => User.current.id).empty? && Time.parse(@exercise.end_time.to_s).strftime("%Y-%m-%d-%H-%M-%S") > Time.now.strftime("%Y-%m-%d-%H-%M-%S")
      @exercise_users_list = @exercise.exercise_users.where("user_id = ? and score is not NULL",User.current.id)
    else
      @exercise_users_list = []
    end
    respond_to do |format|
      format.html
    end
  end

  private
  def find_course
    @course = Course.find params[:course_id]
  rescue Exception => e
    render_404
  end
end