class ExercisesController < ApplicationController
  before_action :require_login, :check_auth, except: [:index]
  before_action :find_course, only: [:index, :new, :create, :my_exercises, :public_exercises, :set_public, :destroys,
                                     :join_exercise_banks, :publish_modal, :publish, :end_modal, :end_exercise] #需要有课堂id参数的
  before_action :get_exercise, except: [:index, :new, :create, :my_exercises, :public_exercises, :set_public, :destroys,
                                        :join_exercise_banks, :publish_modal, :publish, :end_modal, :end_exercise]
  before_action :user_course_identity
  before_action :is_course_teacher, except: [:index, :start_answer, :exercise_setting, :commit_exercise, :exercise_lists, :review_exercise,
                                             :exercise_result, :common_header, :cancel_exercise, :begin_commit]
  before_action :get_left_banner_id, only: [:common_header, :start_answer, :review_exercise, :index, :new, :edit]
  before_action :validates_exercise_params, only: [:create, :update]
  before_action :get_exercise_question_counts, only: [:show, :edit, :start_answer, :review_exercise, :blank_exercise, :export_exercise]
  before_action :validate_publish_time, only: [:commit_setting] #提交设置时，需判断时间是否符合
  before_action :check_course_public, only: [:set_public]
  before_action :check_user_on_answer, only: [:show, :start_answer, :exercise_lists] #判断当前用户在试卷的权限/老师是否属于分班的权限
  before_action :only_student_in, only: [:start_answer]
  before_action :check_user_id_start_answer, only: [:start_answer, :review_exercise]
  # before_action :commit_user_exercise,only: [:start_answer,:exercise_lists,:review_exercise]   #已有定时的任务
  before_action :check_exercise_time, only: [:commit_exercise] #提交试卷时，判断时间是否超过
  before_action :check_exercise_status, only: [:redo_modal, :redo_exercise]
  before_action :check_exercise_is_end, only: [:review_exercise]
  before_action :check_exercise_public, only: [:exercise_result] #试卷是否为公开
  before_action :commit_shixun_present, only: [:commit_shixun]
  include ExportHelper
  include ExercisesHelper

  # model validation error
  rescue_from ActiveRecord::RecordInvalid do |ex|
    render_error(ex.record.errors.full_messages.join(','))
  end
  # form validation error
  rescue_from ActiveModel::ValidationError do |ex|
    render_error(ex.model.errors.full_messages.join(','))
  end

  def index
    begin
      # 按发布时间或创建时间排序
      @exercises_all = @course.exercises
      member_show_exercises = @exercises_all.is_exercise_published #已发布的或已截止的试卷
      @current_user_ = current_user

      # 课堂的学生人数
      @course_all_members = @course.students #当前课堂的全部学生
      @current_student = @course_all_members.course_find_by_ids("user_id", current_user.id) #当前用户是否为课堂的学生

      # exercises的不同用户群体的显示
      if @user_course_identity < Course::STUDENT # @is_teacher_or 1为老师/管理员/助教
        @is_teacher_or = 1
        @exercises = @exercises_all #老师能看到全部的试卷，不管是已发布的/未发布的/已截止的/统一设置的/私有设置的（看到内容不同）
      elsif @user_course_identity == Course::STUDENT # 2为课堂成员，能看到统一设置的和自己班级的
        @is_teacher_or = 2
        @member_group_id = @current_student.first.try(:course_group_id).to_i # 成员的分班id，默认为0
        if @member_group_id == 0 #表示是课堂的未分班成员,只能查看统一设置的试卷（已发布的/已截止的）
          @exercises = member_show_exercises.exists? ? member_show_exercises.unified_setting : []
        else #已分班级的成员，可以查看统一设置和单独设置（试卷是发布在该班级）试卷
          # 已发布 当前用户班级分组的 试卷id
          publish_exercise_ids = @course.exercise_group_settings.exercise_group_published.where("course_group_id = #{@member_group_id}").pluck(:exercise_id)
          @exercises = member_show_exercises.unified_setting.or(member_show_exercises.where(id: publish_exercise_ids))
        end
      else #用户未登陆或不是该课堂成员,仅显示统一设置的（已发布的/已截止的），如有公开，则不显示锁，不公开，则显示锁
        @is_teacher_or = 0
        @exercises = member_show_exercises.unified_setting
      end

      if @exercises.size > 0
        if params[:type].present?
          choose_type = params[:type].to_i
          ex_setting_ids = []
          if @is_teacher_or != 2
            @exercises = @exercises.where("exercise_status = #{choose_type}")
          else
            case choose_type
            when 1
              ex_setting_ids = @course.exercise_group_settings.where("course_group_id = #{@member_group_id}").exercise_group_not_published.pluck(:exercise_id)
            when 2
              ex_setting_ids = @course.exercise_group_settings.where("course_group_id = #{@member_group_id}")
                                 .where("publish_time is not null and publish_time <= ? and end_time > ?", Time.now, Time.now).pluck(:exercise_id)
            when 3
              ex_setting_ids = @course.exercise_group_settings.where("course_group_id = #{@member_group_id}").exercise_group_ended.pluck(:exercise_id)
            end
            unified_setting_ids = @exercises.unified_setting.where("exercise_status = #{choose_type}").pluck(:id)
            ex_ids = (ex_setting_ids + unified_setting_ids).uniq
            @exercises = @exercises.where(id: ex_ids)
          end
        end

        if params[:search].present?
          search_type = params[:search].to_s.strip
          @exercises = @exercises.exercise_search(search_type)
        end

        @exercises_select_count = @exercises.size # 全部页面，需返回
        @exercises = @exercises.distinct.order("IF(ISNULL(publish_time),0,1), publish_time DESC,created_at DESC") #出现错误

        # 分页
        @page = params[:page] || 1
        @limit = params[:limit] || 15
        @exercises = @exercises.page(@page).per(@limit)
        @exercises = @exercises&.includes(:published_settings)
      else
        @exercises = []
      end

      @course_all_members_count = @course_all_members.size #当前课堂的学生数
      @exercises_count = @exercises_all.size # 全部页面，需返回
      @exercises_unpublish_counts = @exercises_all.exercise_by_status(1).size #未发布的试卷数
      @exercises_published_counts = @exercises_count - @exercises_unpublish_counts # 已发布的试卷数,包含已截止的

    rescue Exception => e
      uid_logger_error(e.message)
      tip_exception(e.message)
      raise ActiveRecord::Rollback
    end
  end

  def new
    ActiveRecord::Base.transaction do
      begin
        @exercise = Exercise.new
      rescue Exception => e
        uid_logger_error(e.message)
        tip_exception("试卷创建失败！")
        raise ActiveRecord::Rollback
      end
    end
  end

  def create
    ActiveRecord::Base.transaction do
      ex_name = params[:exercise_name]
      ex_desc = params[:exercise_description]
      exercise_options = {
        :exercise_name => ex_name,
        :exercise_description => ex_desc,
        :user_id => current_user.id,
        :course_id => @course.id,
        :time => -1,
        :exercise_status => 1
      }
      @exercise = Exercise.create!(exercise_options)
    end
  end

  #试卷的内容，及试题/答案的内容编辑
  def edit
    ActiveRecord::Base.transaction do
      @exercise_questions = @exercise.exercise_questions.order("question_number ASC")
    end
  end

  def update
    ActiveRecord::Base.transaction do
      ex_name = params[:exercise_name]
      ex_desc = params[:exercise_description]
      exercise_options = {
        :exercise_name => ex_name,
        :exercise_description => ex_desc,
      }
      @exercise.update!(exercise_options)
      normal_status(0, "试卷更新成功！")
    end
  end

  def show
    ActiveRecord::Base.transaction do
      if @user_course_identity < Course::STUDENT
        @is_teacher_or = 1 #为老师/助教/管理员
      else
        @is_teacher_or = 0 #为学生
      end
      @exercise_questions = @exercise.exercise_questions&.includes(:exercise_choices, :exercise_shixun_challenges, :exercise_standard_answers).order("question_number ASC")
    end
  end

  #试卷的公用头部
  def common_header
    ActiveRecord::Base.transaction do
      @user_left_time = nil
      if @user_course_identity > Course::ASSISTANT_PROFESSOR
        @is_teacher_or = 0
        @user_exercise_answer = @exercise.check_user_answer_status(current_user)
        @user_commit_counts = 0
        @user_left_time = get_exercise_left_time(@exercise, current_user)
      else
        @is_teacher_or = 1
        @user_exercise_answer = 3 #教师页面
        @user_commit_counts = @exercise.exercise_users.where(commit_status: 1).size #已提交的用户数
      end
      @ex_status = @exercise.get_exercise_status(current_user)

      exercise_id_array = [@exercise.id]
      @exercise_publish_count = get_user_permission_course(exercise_id_array, Exercise::PUBLISHED).size #是否存在已发布的
      @exercise_unpublish_count = get_user_permission_course(exercise_id_array, Exercise::UNPUBLISHED).size #是否存在未发布的

      if (@exercise_publish_count == 0) && (@exercise_unpublish_count == 0) #即表示没有分班
        if @ex_status == Exercise::UNPUBLISHED
          @exercise_unpublish_count = 1 #试卷未发布，且课堂没有分班的时候
        elsif @ex_status == Exercise::PUBLISHED
          @exercise_publish_count = 1 #试卷未发布，且课堂没有分班的时候
        end
      end
    end
  end

  #实训题目的选用
  def choose_shixun
    ActiveRecord::Base.transaction do
      search = params[:search]
      if @user_course_identity > Course::ADMIN #当不为管理员的时候
        user_school_id = current_user.school_id #当前用户的学校id
        if user_school_id.present?
          none_shixun_ids = ShixunSchool.where("school_id != #{user_school_id}").pluck(:shixun_id)
          @publish_shixuns = Shixun.where.not(id: none_shixun_ids).unhidden
        end
      else
        @publish_shixuns = Shixun.unhidden
      end
      if search.present?
        @publish_shixuns = @publish_shixuns.search_by_name(search)
      end

      @shixuns = @publish_shixuns.joins(:challenges).where("challenges.st != 0").distinct
      # 全部页面，需返回
      @shixuns_count = @shixuns.count

      # 分页
      @page = params[:page] || 1
      @limit = params[:limit] || 8

      @shixuns = @shixuns.page(@page).per(@limit)
    end
  end

  #确认实训的选择
  def commit_shixun
    ActiveRecord::Base.transaction do
      @shixun_challenges = @shixun.challenges
      @shixun_challenges_count = @shixun_challenges.size
    end
  end

  # 首页批量或单独删除
  def destroys
    ActiveRecord::Base.transaction do
      check_ids = Exercise.where(id: params[:check_ids])
      check_ids.destroy_all
      normal_status(0, "试卷已删除成功！")
    end
  end

  # 设为公开
  def set_public
    ActiveRecord::Base.transaction do
      check_ids = Exercise.where(id: params[:check_ids])
      check_ids.each do |exercise|
        exercise.update!(is_public: true)
      end
      normal_status(0, "试卷已设为公开！")
    end
  end

  ## 加入题库
  def join_exercise_banks
    ActiveRecord::Base.transaction do
      check_ids = Exercise.where(id: params[:check_ids])
      check_ids.each do |exercise|
        current_ex_bank = current_user.exercise_banks.find_by_container(exercise.id, "Exercise")&.first
        if current_ex_bank.present? #当前用户的选择试卷是否已加入习题库，存在则更新习题库和问题库，否则新建习题库和问题库
          ex_params = {
            :name => exercise.exercise_name,
            :description => exercise.exercise_description,
            :course_list_id => exercise.course.try(:course_list_id)
          }
          current_ex_bank.update!(ex_params)
          # question_bank = QuestionBank.ques_by_container(current_ex_bank.id,current_ex_bank.container_type).first  #该习题库是否存在于问题库里
          # ques_params = {
          #     :name => current_ex_bank.name,
          #     :course_list_id => current_ex_bank.course_list_id
          # }
          # question_bank.update_attributes(ques_params) if question_bank.present?
          current_ex_bank.exercise_bank_questions.destroy_all # 更新后，习题库的问题全部删除，后续重新再建
        else
          ex_params = {
            :name => exercise.exercise_name,
            :description => exercise.exercise_description,
            :user_id => current_user.id,
            :is_public => 0,
            :course_list_id => exercise.course.try(:course_list_id),
            :container_id => exercise.id,
            :container_type => "Exercise",
            :quotes => 1
          }
          current_ex_bank = ExerciseBank.new ex_params
          current_ex_bank.save! #如果习题库保存成功，则会创建问题库question_bank
          # if current_ex_bank.save
          #   ques_params = {
          #       :name => current_ex_bank.name,
          #       :container_id => current_ex_bank.id,
          #       :container_type => current_ex_bank.container_type,
          #       :quotes => current_ex_bank.quotes,
          #       :user_id => current_ex_bank.user_id,
          #       :is_public => current_ex_bank.is_public,
          #       :course_list_id => current_ex_bank.course_list_id
          #   }
          #   question_bank = QuestionBank.new ques_params
          #   question_bank.save
          # end
          exercise.update!(exercise_bank_id: current_ex_bank.id)
        end
        # 试卷的问题的输入
        exercise.exercise_questions.each do |q|
          option = {
            :question_title => q.question_title,
            :question_type => q.question_type,
            :question_number => q.question_number,
            :question_score => q.question_score,
            :shixun_id => q.shixun_id,
            :shixun_name => q.shixun_name,
            :is_ordered => q.is_ordered
          }
          exercise_bank_question = current_ex_bank.exercise_bank_questions.new option
          exercise_bank_question.save!
          ## 试卷选项的输入
          if q.question_type != Exercise::PRACTICAL #不为实训题时,试卷选项加入试题答案库
            ex_choices = q.exercise_choices
            ex_standard = q.exercise_standard_answers
            ex_choices.each do |c|
              choice_option = {
                :choice_position => c.choice_position,
                :choice_text => c.choice_text
              }
              ex_bank_choice = exercise_bank_question.exercise_bank_choices.new choice_option
              ex_bank_choice.save!
            end
            ex_standard.each do |s|
              ex_stand = {
                :exercise_bank_choice_id => s.exercise_choice_id,
                :answer_text => s.answer_text
              }
              ex_stand_bank = exercise_bank_question.exercise_bank_standard_answers.new ex_stand
              ex_stand_bank.save!
            end
          else #当为实训题时
            shixun_challenges = q.exercise_shixun_challenges
            shixun_challenges.each do |c|
              challenge_option = {
                :position => c.position,
                :challenge_id => c.challenge_id,
                :shixun_id => q.shixun_id,
                :question_score => c.question_score
              }
              shixun_challenge_bank = exercise_bank_question.exercise_bank_shixun_challenges.new challenge_option
              shixun_challenge_bank.save!
            end
          end
        end
        current_ex_bank.save!
      end
      normal_status(0, "题库更新成功！")
    end
  end

  #试卷的设置页面
  def exercise_setting
    ActiveRecord::Base.transaction do
      @user_permission = 2
      @user_course_groups = @course.teacher_group(current_user.id) #当前老师的分班
      @being_setting_course_ids = @exercise.common_published_ids(current_user.id) #当前用户已发布的班级的id
      @user_published_setting = @exercise.exercise_group_settings
                                  .find_in_exercise_group("course_group_id", @being_setting_course_ids) #当前用户已发布班级的试卷设置
      exercise_ids = [@exercise.id]
      @exercise_publish_count = get_user_permission_course(exercise_ids, Exercise::PUBLISHED).count #判断当前用户是否有试卷已发布的分班，用于显示立即截止/撤销发布
      @exercise_unpublish_count = get_user_permission_course(exercise_ids, Exercise::UNPUBLISHED).count #判断当前用户是否有试卷未发布的分班，用户显示立即发布
      @exercise_users_count = @exercise.exercise_users.commit_exercise_by_status(1).count #判断当前试卷是否有已提交的
      # ## 需添加发送消息的接口，稍后添加
    end
  end

  #试卷的提交设置
  def commit_setting
    ActiveRecord::Base.transaction do
      error_count = 0 # 判断循环里是否有已发布/已截止的，且时间更改了的分班。
      # course_group_ids = @course.teacher_course_group_ids(current_user.id)  #当前老师的班级id数组
      course_group_ids = @course.charge_group_ids(current_user) #当前老师的班级id数组

      exercise_status = @exercise.get_exercise_status(current_user)

      if exercise_status == Exercise::UNPUBLISHED && course_group_ids.size > 0 # 试卷未发布，且老师的分班大于1 ，才可以修改统一设置，否则按试卷默认的来处理
        unified_setting = params[:unified_setting]
      else
        unified_setting = @exercise.unified_setting
      end

      show_statistic = params[:show_statistic] ? true : false
      exercise_time = params[:time].blank? ? -1 : params[:time]
      question_random = params[:question_random] ? true : false #问题是否随机，0为不随机，1为随机
      choice_random = params[:choice_random] ? true : false
      score_open = params[:score_open] ? true : false #分数是否公开
      answer_open = params[:answer_open] ? true : false #答案是否公开

      # 统一设置或者分班为0，则更新试卷，并删除试卷分组
      if unified_setting || (course_group_ids.size == 0)
        tip_exception("发布时间不能为空") if params[:publish_time].blank?
        tip_exception("截止时间不能为空") if params[:end_time].blank?
        tip_exception("截止时间必须晚于发布时间") if params[:publish_time].to_time >= params[:end_time].to_time
        tip_exception("截止时间不能晚于课堂结束时间（#{@course.end_date.end_of_day.strftime("%Y-%m-%d %H:%M")}）") if @course.end_date.present? && params[:end_time].to_time > @course.end_date.end_of_day

        params_publish_time = params[:publish_time].to_time
        params_end_time = params[:end_time].to_time

        if (exercise_status != Exercise::UNPUBLISHED) && (@exercise.publish_time != params_publish_time)
          normal_status(-1, "已发布/已截止,不允许修改发布时间")
        elsif params_publish_time.present? && params_end_time.present? && params_end_time < params_publish_time
          normal_status(-1, "截止时间不能小于发布时间")
        else
          #发布时间小于当前时间，则试卷显示为未发布,当截止时间大于当前时间，则显示为已截止
          exercise_status_n = set_exercise_status(params_publish_time, params_end_time)
          exercise_params = {
            :unified_setting => unified_setting,
            :show_statistic => show_statistic,
            :time => exercise_time,
            :question_random => question_random,
            :choice_random => choice_random,
            :score_open => score_open,
            :answer_open => answer_open,
            :exercise_status => exercise_status_n,
            :publish_time => params_publish_time,
            :end_time => params_end_time
          }
          @exercise.update!(exercise_params)
          @exercise.exercise_group_settings.destroy_all
          normal_status(0, "试卷设置成功！")
        end
      else
        params_times = params[:publish_time_groups] #分班返回的json数组{"publish_time_groups":[{"course_group_id":"1","publish_time":"xx","end_time":"xxx"}]}
        exercise_groups = @exercise.exercise_group_settings.find_in_exercise_group("course_id", @course.id) #试卷的全部分班信息
        exercise_groups_ids = exercise_groups.pluck(:course_group_id) #问卷的全部分班id
        total_common = params_times.map {|k| k[:course_group_id]}.sum.uniq #传入的所有分组的分班id
        total_common_group = exercise_groups_ids & total_common #传入的分班与问卷已存在的分班的交集
        old_exercise_groups = exercise_groups_ids - total_common_group #后来传入的分班里，没有了的班级，即需要删除

        params_times.each do |t|
          tip_exception("发布时间不能为空") if t[:publish_time].blank?
          tip_exception("截止时间不能为空") if t[:end_time].blank?
          tip_exception("截止时间不能早于发布时间") if t[:publish_time].to_time > t[:end_time].to_time
          tip_exception("截止时间不能晚于课堂结束时间（#{@course.end_date.end_of_day.strftime("%Y-%m-%d %H:%M")}）") if @course.end_date.present? && t[:end_time].to_time > @course.end_date.end_of_day

          course_id = t[:course_group_id]
          exercise_publish_time = t[:publish_time].to_time
          exercise_end_time = t[:end_time].to_time

          exercise_group = exercise_groups.find_in_exercise_group("course_group_id", course_id) #判断该分班是否存在
          if exercise_group.present? && (exercise_group.first.publish_time < Time.now) && (exercise_publish_time != exercise_group.first.publish_time)
            error_count += 1
          end
          if exercise_group.present? && (exercise_group.first.publish_time < Time.now && exercise_group.first.end_time > Time.now) && (exercise_end_time < Time.now)
            error_count += 1
          end
          if error_count == 0
            common_group = exercise_groups_ids & course_id #传入的班级与问卷已存在的班级的交集，即表示已有分班的
            new_group_ids = course_id - common_group #新传入的班级id
            if common_group.count > 0 #判断试卷的分班设置是否存在，存在则更新，负责则新建
              exercise_group_sets = exercise_groups.find_in_exercise_group("course_group_id", common_group)
              exercise_group_sets.each do |the_group_setting|
                ex_group_params = {
                  :publish_time => exercise_publish_time,
                  :end_time => exercise_end_time
                }

                the_group_setting_status = set_exercise_status(the_group_setting.publish_time, the_group_setting.end_time)
                if the_group_setting_status == 2
                  ex_group_params = {
                    :publish_time => the_group_setting.publish_time,
                    :end_time => exercise_end_time < Time.now ? the_group_setting.end_time : exercise_end_time
                  }
                elsif the_group_setting_status == 3
                  ex_group_params = {
                    :publish_time => the_group_setting.publish_time,
                    :end_time => exercise_end_time
                  }
                end
                the_group_setting.update!(ex_group_params)
              end
            end
            if new_group_ids.size > 0
              new_group_ids.each do |c|
                exercise_group_params = {
                  :exercise_id => @exercise.id,
                  :course_group_id => c,
                  :course_id => @course.id,
                  :publish_time => exercise_publish_time,
                  :end_time => exercise_end_time
                }
                new_exercise_group = ExerciseGroupSetting.new(exercise_group_params)
                new_exercise_group.save!
              end
            end
          end
        end

        if error_count > 0
          error_count == 0
          normal_status(-1, "试卷发布/截止时间不能小于当前时间")
        else
          # 未发布的分班设置才能删除
          if old_exercise_groups.size > 0
            old_all_ex_groups = exercise_groups.find_in_exercise_group("course_group_id", old_exercise_groups).exercise_group_not_published
            old_all_ex_groups.destroy_all
          end
          #试卷更新为exercise_group_setting的发布时间最小，截止时间最大
          e_time_present = exercise_groups.end_time_no_null.map(&:end_time)
          p_time_present = exercise_groups.publish_time_no_null.map(&:publish_time)
          e_time = e_time_present.size > 0 ? e_time_present.max : nil
          p_time = p_time_present.size > 0 ? p_time_present.min : nil
          exercise_status = 1
          if p_time.nil? #发布时间为空，则表示问卷未发布
            exercise_status = 1
          elsif p_time.present? && e_time.present?
            exercise_status = set_exercise_status(p_time, e_time)
          end
          exercise_params = {
            :unified_setting => unified_setting,
            :show_statistic => show_statistic,
            :time => exercise_time,
            :question_random => question_random,
            :choice_random => choice_random,
            :score_open => score_open,
            :answer_open => answer_open,
            :exercise_status => exercise_status,
            :publish_time => p_time,
            :end_time => e_time
          }
          @exercise.update!(exercise_params)
          if @exercise.exercise_status == Exercise::PUBLISHED
            if @exercise.course_acts.size == 0
              @exercise.course_acts << CourseActivity.new(:user_id => @exercise.user_id, :course_id => @exercise.course_id)
            end
          end
          normal_status(0, "试卷设置成功！")
        end
      end
    end
  end

  # 对未提交的用户进行调分
  def adjust_score
    exercise_user = @exercise.exercise_users.find_by!(user_id: params[:user_id])
    tip_exception("已提交的作品请去评阅页进行调分") if exercise_user.commit_status == 1 && exercise_user.commit_method != 5
    if @exercise.subjective_score > 0
      tip_exception("主观题成绩不能为空") if params[:subjective_score].blank?
      tip_exception("主观题成绩不能小于零") if params[:subjective_score].to_f < 0
      tip_exception("主观题成绩不能大于总分值：#{@exercise.subjective_score}分") if params[:subjective_score].to_f.round(1) > @exercise.subjective_score.round(1)
    end

    if @exercise.objective_score > 0
      tip_exception("客观题成绩不能为空") if params[:objective_score].blank?
      tip_exception("客观题成绩不能小于零") if params[:objective_score].to_f < 0
      tip_exception("客观题成绩不能大于总分值：#{@exercise.objective_score}分") if params[:objective_score].to_f.round(1) > @exercise.objective_score.round(1)
    end

    ActiveRecord::Base.transaction do
      start_at_time = exercise_user.start_at || Time.now
      subjective_score = @exercise.subjective_score > 0 ? params[:subjective_score].to_f.round(2) : 0
      objective_score = @exercise.objective_score > 0 ? params[:objective_score].to_f.round(2) : 0
      score = subjective_score + objective_score
      if exercise_user.commit_status == 1
        exercise_user.update!(score: score, subjective_score: subjective_score, objective_score: objective_score)
      else
        exercise_user.update!(start_at: start_at_time, end_at: Time.now, status: 1, commit_status: 1, score: score,
                              subjective_score: subjective_score, objective_score: objective_score, commit_method: 5)
      end

      ExerciseUserScore.create!(exercise_id: @exercise.id, exercise_user_id: exercise_user.id,
                                subjective_score: subjective_score, objective_score: objective_score)
      normal_status("操作成功")
    end
  end

  #我的题库
  def my_exercises
    ActiveRecord::Base.transaction do
      ## 我的试卷题库
      @current_user_exercises = current_user.exercise_banks.find_by_c_type("Exercise")
      if @current_user_exercises.present?

        if params[:search].present?
          search_type = params[:search].to_s.strip
          @current_user_exercises = @current_user_exercises.exercise_bank_search(search_type)
        end
        page = params[:page] || 1
        limit = params[:limit] || 15
        @my_exercises_count = @current_user_exercises.size
        @current_user_exercises = @current_user_exercises.page(page).per(limit)
      else
        @current_user_exercises = []
      end
    end
  end

  # 公共题库
  def public_exercises
    ActiveRecord::Base.transaction do
      if current_user.is_certification_teacher
        @user_certification = 1 #用户已通过认证
        @public_exercises = ExerciseBank.find_by_c_type("Exercise").public_exercises
        if @public_exercises.present?
          if params[:search].present?
            search_type = params[:search].to_s.strip
            @public_exercises = @public_exercises.exercise_bank_search(search_type)
          end
          page = params[:page] || 1
          limit = params[:limit] || 15
          @public_exercises_count = @public_exercises.size
          @public_exercises = @public_exercises.page(page).per(limit)
        else
          @public_exercises_count = 0
          @public_exercises = []
        end
      else
        @user_certification = 0 #用户未通过认证
        @public_exercises_count = 0
        @public_exercises = []
      end
    end
  end

  #立即发布的弹窗内容
  def publish_modal

    ActiveRecord::Base.transaction do
      exercise_ids = params[:check_ids]
      if exercise_ids.count > 0
        @course_groups = get_user_permission_course(exercise_ids, 1)
      else
        @course_groups = []
      end
    end
  end

  # 详情页的立即发布弹框
  def publish_groups
    @current_user = current_user
    # 可立即发布的分班：当前用户管理的分班去除已发布的分班
    group_ids = @course.charge_group_ids(@current_user) - @exercise.exercise_group_settings.exercise_group_published.pluck(:course_group_id)
    @course_groups = @course.course_groups.where(id: group_ids)
    @group_settings = @exercise.exercise_group_settings.where(course_group_id: group_ids)
  end

  #首页批量或单独 立即发布,应是跳出弹窗，设置开始时间和截止时间。
  def publish
    group_ids = params[:group_ids]&.reject(&:blank?)
    if params[:detail].blank?
      tip_exception("缺少截止时间参数") if params[:end_time].blank?
      tip_exception("截止时间不能早于当前时间") if params[:end_time] <= strf_time(Time.now)
      tip_exception("截止时间不能晚于课堂结束时间（#{@course.end_date.end_of_day.strftime("%Y-%m-%d %H:%M")}）") if @course.end_date.present? && params[:end_time] > strf_time(@course.end_date.end_of_day)
    else
      group_end_times = params[:group_end_times].reject(&:blank?).map {|time| time.to_time}
      tip_exception("缺少截止时间参数") if group_end_times.blank?
      tip_exception("截止时间和分班参数的个数不一致") if group_end_times.length != group_ids.length
      group_end_times.each do |time|
        tip_exception("分班截止时间不能早于当前时间") if time <= Time.now
        tip_exception("分班截止时间不能晚于课堂结束时间（#{@course.end_date.end_of_day.strftime("%Y-%m-%d %H:%M")}）") if @course.end_date.present? && time > @course.end_date.end_of_day
      end
    end

    ActiveRecord::Base.transaction do
      check_ids = Exercise.where(id: params[:check_ids])
      ex_end_time = params[:end_time].blank? ? Time.at(((1.month.since.to_i) / 3600.0).ceil * 3600) : params[:end_time].to_time
      check_ids.each do |exercise|
        if exercise.present?
          if exercise.unified_setting
            ex_status = exercise.exercise_status #则为试卷的状态
          else
            ex_status = @course.course_groups.where(id: params[:group_ids]).size !=
              exercise.exercise_group_settings.where(course_group_id: params[:group_ids]).exercise_group_published.size ? 1 : 0
          end
          if ex_status == 1 #如果试卷存在已发布的，或者是已截止的，那么则直接跳过
            g_course = group_ids #表示是否传入分班参数,如果传入分班的参数，那么试卷的统一设置需修改
            tiding_group_ids = g_course
            if g_course
              user_course_groups = @course.course_groups.pluck(:id)
              if g_course.map(&:to_i).sort == user_course_groups.sort &&
                ((params[:detail] && group_end_times.min == group_end_times.max) || params[:detail].blank?) # 如果是设置为全部班级，则试卷不用分组，且试卷设定为统一设置,否则则分组设置
                exercise.exercise_group_settings.destroy_all
                ex_unified = true
                e_time = params[:detail] ? group_end_times.max : ex_end_time
                tiding_group_ids = []
              else
                ex_unified = false
                g_course.each_with_index do |i, index|
                  exercise_group_setting = exercise.exercise_group_settings.find_in_exercise_group("course_group_id", i).first #根据课堂分班的id，寻找试卷所在的班级
                  group_end_time = params[:detail] ? group_end_times[index] : ex_end_time
                  if exercise_group_setting.present? #如果该试卷分组存在，则更新，否则新建
                    exercise_group_setting.update!(publish_time: Time.now, end_time: group_end_time)
                  else
                    p_course_group = {
                      :exercise_id => exercise.id,
                      :course_group_id => i,
                      :course_id => exercise.course.id,
                      :publish_time => Time.now,
                      :end_time => group_end_time,
                    }
                    new_exercise_group = exercise.exercise_group_settings.new p_course_group
                    new_exercise_group.save!
                  end
                end
                # group_ids = params[:group_ids]
                e_time = exercise.exercise_group_settings.end_time_no_null.map(&:end_time).max
              end
            else
              exercise.exercise_group_settings.destroy_all
              ex_unified = true
              e_time = ex_end_time
            end

            ex_status = set_exercise_status(Time.now, e_time)
            exercise_params = {
              :publish_time => Time.now,
              :end_time => e_time,
              :exercise_status => ex_status,
              :unified_setting => ex_unified
            }
            exercise.update!(exercise_params)

            if exercise.course_acts.size == 0
              exercise.course_acts << CourseActivity.new(:user_id => exercise.user_id, :course_id => exercise.course_id)
            end
            ExercisePublishNotifyJob.perform_later(exercise.id, tiding_group_ids)
          end
        end
      end
      normal_status(0, "试卷发布成功！")
    end
  end

  #立即截止的弹窗内容
  def end_modal
    ActiveRecord::Base.transaction do
      exercise_ids = params[:check_ids]
      if exercise_ids.count > 0
        @course_groups = get_user_permission_course(exercise_ids, 3)
      else
        @course_groups = []
      end
    end
  end

  # 首页批量或单独 立即截止，截止时间为当前时间
  def end_exercise

    ActiveRecord::Base.transaction do
      check_ids = Exercise.where(id: params[:check_ids])
      course_students = @course.students #课堂的全部学生数
      check_ids.each do |exercise|
        exercise_status = exercise.get_exercise_status(current_user)
        if exercise_status == Exercise::PUBLISHED #跳过已截止的或未发布的
          g_course = params[:group_ids]
          if g_course.present?
            teacher_course_group_ids = @course.charge_group_ids(current_user)
            all_course_group_ids = @course.course_groups.pluck(:id)
            if exercise.unified_setting && g_course.map(&:to_i).sort == all_course_group_ids.sort #开始为统一设置
              exercise.exercise_group_settings.destroy_all
              new_ex_status = set_exercise_status(exercise.publish_time, Time.now)
              exercise.update!(:end_time => Time.now, :exercise_status => new_ex_status)
              exercise_users = exercise.exercise_users
            else
              course_members_ids = course_students.course_find_by_ids("course_group_id", g_course).pluck(:user_id).uniq #该班级的全部学生
              exercise_users = exercise.exercise_users.exercise_commit_users(course_members_ids) #参与答题的学生数
              ex_group_setting = exercise.exercise_group_settings
              old_exercise_groups = ex_group_setting.find_in_exercise_group("course_group_id", g_course) #试卷的分组设置
              left_course_groups = teacher_course_group_ids - g_course
              left_exercise_groups = ex_group_setting.find_in_exercise_group("course_group_id", left_course_groups)
              if left_exercise_groups.blank? && exercise.unified_setting
                if left_course_groups.size > 0 #开始为统一设置，但是立即截止为分班。则创建没有立即截止的班级的exercise_group_setting
                  left_course_groups.each do |g|
                    ex_group_options = {
                      :exercise_id => exercise.id,
                      :course_group_id => g,
                      :course_id => @course.id,
                      :publish_time => exercise.publish_time,
                      :end_time => exercise.end_time
                    }
                    ExerciseGroupSetting.create!(ex_group_options)
                  end
                end
              end
              if old_exercise_groups.present?
                old_exercise_groups.update_all(:end_time => Time.now)
              else
                g_course.each do |g|
                  ex_group_options = {
                    :exercise_id => exercise.id,
                    :course_group_id => g,
                    :course_id => @course.id,
                    :publish_time => exercise.publish_time,
                    :end_time => Time.now
                  }
                  ExerciseGroupSetting.create!(ex_group_options)
                end
              end
              new_end_time = exercise.exercise_group_settings.end_time_no_null.map(&:end_time) # 试卷结束时间不为空的
              new_end_time_s = new_end_time.count > 0 ? new_end_time.max : Time.now
              new_ex_status = set_exercise_status(exercise.publish_time, new_end_time_s)
              exercise.update!(:end_time => new_end_time_s, :exercise_status => new_ex_status, :unified_setting => false)
            end
          else
            exercise_users = exercise.exercise_users
            exercise.update!(:exercise_status => 3, :end_time => Time.now, :unified_setting => true)
          end

          ex_user_ids = exercise_users.pluck(:id)

          EndExerciseCalculateJob.perform_later(ex_user_ids, exercise, Time.now.to_s)
          # exercise_users.each do |user|
          #   if user.commit_status == 0 && user.start_at.present?
          #     objective_score = calculate_student_score(exercise,user.user)[:total_score]
          #     user_sub_score = user.subjective_score
          #     subjective_score = user_sub_score < 0.0 ? 0.0 : user_sub_score
          #     total_score = objective_score + subjective_score
          #     commit_option = {
          #         :status => 1,
          #         :commit_status => 1,
          #         :end_at => Time.now,
          #         :objective_score => objective_score,
          #         :score => total_score,
          #         :subjective_score => user_sub_score
          #     }
          #     user.update_attributes(commit_option)
          #   end
          # end
        end
      end
      normal_status(0, "试卷截止成功！")
    end
  end

  #学生撤销回答
  def cancel_exercise
    ActiveRecord::Base.transaction do
      ex_question_ids = @exercise.exercise_questions.pluck(:id)
      exercise_user = @exercise.exercise_users.exercise_commit_users(current_user.id).first
      if exercise_user.present?
        if exercise_user.commit_status == 1 && @exercise.get_exercise_status(current_user) == Exercise::PUBLISHED #用户已提交且试卷提交中
          if @exercise.time == -1 || ((Time.now.to_i - exercise_user.start_at.to_i) < @exercise.time.to_i * 60)
            exercise_user.update!(:score => nil, :end_at => nil, :status => nil, :commit_status => 0,
                                  :objective_score => 0.0, :subjective_score => -1.0)
            exercise_user.user.exercise_shixun_answers.search_shixun_answers("exercise_question_id", ex_question_ids).destroy_all
            exercise_answers = exercise_user.user.exercise_answers.search_answer_users("exercise_question_id", ex_question_ids)
            exercise_answers.update_all(:score => -1.0)
            all_answer_comment = ExerciseAnswerComment.search_answer_comments("exercise_question_id", ex_question_ids)
                                   .search_answer_comments("exercise_answer_id", exercise_answers.pluck(:id))
            all_answer_comment.destroy_all
            normal_status(0, "撤销回答成功")
          else
            normal_status(-1, "用户答题时间已到")
          end
        else
          normal_status(-1, "用户未提交/试卷不是提交中")
        end
      else
        normal_status(-1, "当前用户未答题")
      end
    end
  end

  #打回重做modal
  def redo_modal
    ActiveRecord::Base.transaction do
      #搜索
      if params[:realname].present?
        search_name = params[:realname]
        #搜索用户的nickname,如果存在则返回，否则继续查询用户的真实姓名或学生号
        @exercise_users = @exercise_users.includes(:user).where("LOWER(concat(users.lastname, users.firstname)) like ?",
                                                                "%#{search_name}%")
      end
      if params[:student_id].present?
        search_st_id = params[:student_id].to_i
        @exercise_users = @exercise_users.includes(user: [:user_extension])
                            .where('user_extensions.student_id like ?', "%#{search_st_id}%")
      end
      sort = params[:sort] ? params[:sort] : "asc"
      @exercise_users = @exercise_users.order("score #{sort}")
      @exercise_users_size = @exercise_users.size
      # 分页
      page = params[:page] || 1
      limit = params[:limit] || 15
      @exercise_users = @exercise_users.page(page).per(limit)
    end
  end

  #打回重做确认
  def redo_exercise
    ActiveRecord::Base.transaction do
      user_ids = params[:user_ids]
      if user_ids.present?
        redo_option = {
          :score => 0.0,
          :start_at => nil,
          :end_at => nil,
          :status => nil,
          :commit_status => 0,
          :objective_score => 0.0,
          :subjective_score => -1.0,
          :commit_method => 0
        }
        redo_exercise_users = @exercise_users.exercise_commit_users(user_ids)
        redo_exercise_users.update_all(redo_option)
        exercise_question_ids = @exercise.exercise_questions.pluck(:id).uniq
        ExerciseAnswer.search_answer_users("user_id", user_ids)
          .search_answer_users("exercise_question_id", exercise_question_ids).destroy_all
        ExerciseShixunAnswer.search_shixun_answers("user_id", user_ids)
          .search_shixun_answers("exercise_question_id", exercise_question_ids).destroy_all

        normal_status(0, "已成功打回重做！")
      else
        normal_status(-1, "请选择学生！")
      end
    end
  end

  #学生开始答题页面
  def start_answer
    ex_users_current = ExerciseUser.where(user_id: @exercise_current_user_id, exercise_id: @exercise.id) #不能用@exercise.exercise_users，因为exercise_users删除时，只是状态改变，未删除
    @exercise_user_current = ex_users_current&.first
    if ex_users_current.exists?
      if @exercise_user_current.start_at.blank?
        @exercise_user_current.update!(start_at: Time.now)
      end
    else
      if @user_course_identity > Course::ASSISTANT_PROFESSOR #当为老师的时候，不创建exercise_user表，理论上老师是不能进入答题的
        exercise_user_params = {
          :user_id => @exercise_current_user_id,
          :exercise_id => @exercise.id,
          :start_at => Time.now
        }
        exercise_user_current = ExerciseUser.new(exercise_user_params)
        exercise_user_current.save!
      end
    end
    @t_user_exercise_status = @exercise.get_exercise_status(current_user)

    @user_left_time = nil
    if @user_course_identity < Course::STUDENT || (@t_user_exercise_status == 3) ||
      (ex_users_current.exists? && @exercise_user_current.commit_status == 1)
      @user_exercise_status = 1 #当前用户为老师/试卷已截止/试卷已提交不可编辑
    else
      @user_left_time = get_exercise_left_time(@exercise, current_user)
      @user_exercise_status = 0 #可编辑
    end

    @exercise_questions = @exercise.exercise_questions

    if @exercise.question_random
      @exercise_questions = @exercise_questions.order("RAND()")
    else
      @exercise_questions = @exercise_questions.order("question_number ASC")
    end
    # 判断问题是否已回答还是未回答
    @exercise_questions = @exercise_questions.includes(:exercise_shixun_challenges,
                                                       :exercise_shixun_answers,
                                                       :exercise_answers,
                                                       :exercise_standard_answers)

    if @t_user_exercise_status == Exercise::DEADLINE
      get_each_student_exercise(@exercise.id, @exercise_questions, @exercise_current_user_id)
    end
    get_user_answer_status(@exercise_questions, @exercise_current_user_id, @exercise, @t_user_exercise_status)

  end

  #提交试卷前的弹窗
  def begin_commit
    ActiveRecord::Base.transaction do
      if @user_course_identity > Course::ASSISTANT_PROFESSOR #为学生时
        @exercise_questions = @exercise.exercise_questions
        @shixun_undo = 0
        @ques_undo = 0
        ex_answer_time = @exercise.time.to_i
        if ex_answer_time > 0 #有剩余时间的时候
          user_left_time = get_exercise_left_time(@exercise, current_user)
          @ex_end_time = Time.now + user_left_time.to_i.seconds
        else
          @ex_end_time = @exercise.get_exercise_end_time(current_user.id)
        end
        # @ex_end_time = @exercise.get_exercise_end_time(current_user.id)
        # if ex_answer_time > 0
        #   left_answer_time = Time.now + ex_answer_time.minutes  #判断试卷的倒计时和截止时间哪个先到
        #   if left_answer_time < @ex_end_time
        #     exercise_end_time = @exercise.exercise_users.exercise_commit_users(current_user.id)
        #     if exercise_end_time.present?
        #       ex_end_times =  exercise_end_time.first.start_at.nil? ? Time.now : exercise_end_time.first.start_at
        #       @ex_end_time = ex_end_times + ex_answer_time.minutes
        #     end
        #   end
        # end
        @exercise_questions.each do |q|
          if q.question_type == Exercise::PRACTICAL #当为实训题时
            user_myshixun = q.shixun.myshixuns.search_myshixun_user(current_user.id)
            if user_myshixun.blank? || user_myshixun.first.status != Exercise::UNPUBLISHED #当前用户的实训是否做完
              @shixun_undo += 1
            end
          else
            ques_vote = q.exercise_answers.search_exercise_answer("user_id", current_user.id)
            if ques_vote.blank?
              @ques_undo += 1
            end
          end
        end
      end
    end
  end

  # 学生提交试卷
  def commit_exercise
    tip_exception(0, "试卷截止时间已到，系统已自动提交") if @answer_committed_user.commit_status == 1
    ActiveRecord::Base.transaction do
      can_commit_exercise = false
      user_left_time = nil
      if @user_course_identity > Course::ASSISTANT_PROFESSOR #为学生时
        if params[:commit_method].to_i == 2 #自动提交时
          user_left_time = get_exercise_left_time(@exercise, current_user)
          Rails.logger.info("######__________auto_commit_user_left_time_________################{user_left_time}")
          if user_left_time.to_i <= 0
            can_commit_exercise = true
          end
        else
          can_commit_exercise = true
        end
        if can_commit_exercise
          objective_score = calculate_student_score(@exercise, current_user, Time.now)[:total_score]
          subjective_score = @answer_committed_user.subjective_score
          total_score_subjective_score = subjective_score < 0.0 ? 0.0 : subjective_score
          total_score = objective_score + total_score_subjective_score
          commit_option = {
            :status => 1,
            :commit_status => 1,
            :end_at => Time.now,
            :objective_score => objective_score,
            :score => total_score,
            :subjective_score => subjective_score,
            :commit_method => @answer_committed_user&.commit_method.to_i > 0 ? @answer_committed_user&.commit_method.to_i : params[:commit_method].to_i
          }
          @answer_committed_user.update!(commit_option)
          CommitExercsieNotifyJobJob.perform_later(@exercise.id, current_user.id)
          normal_status(0, "试卷提交成功！")
        else
          normal_status(-2, "#{user_left_time.to_i}")
        end
      else
        normal_status(-1, "提交失败，当前用户不为课堂学生!")
      end
    end
  end

  #教师评阅试卷 及学生查看试卷
  def review_exercise
    ActiveRecord::Base.transaction do
      # 1 老师权限，0 学生权限
      @is_teacher_or = (@user_course_identity < Course::STUDENT) ? 1 : 0
      @student_status = 2
      @exercise_questions = @exercise.exercise_questions.includes(:exercise_shixun_challenges, :exercise_standard_answers, :exercise_answers, :exercise_shixun_answers, :exercise_answer_comments).order("question_number ASC")
      @question_status = []
      get_exercise_status = @exercise.get_exercise_status(current_user) #当前用户的试卷状态
      @ex_answer_status = @exercise.get_exercise_status(@ex_user&.user) #当前试卷用户的试卷状态
      if @ex_user.present? && @is_teacher_or == 0
        if get_exercise_status == Exercise::PUBLISHED #当前用户已提交，且试卷未截止
          if @ex_user.commit_status == 0 #学生未提交，且当前为学生
            @student_status = 0
          else
            @student_status = 1
            get_user_answer_status(@exercise_questions, @exercise_current_user_id, @exercise, get_exercise_status)
          end
        end
      end
      if @student_status == 2
        get_each_student_exercise(@exercise.id, @exercise_questions, @exercise_current_user_id)
      end
    end
  end

  #答题列表
  def exercise_lists
    @current_user_id = current_user.id
    exercise_ids = [@exercise.id]
    @exercise_status = @exercise.get_exercise_status(current_user)
    @course_all_members = @course.students
    @c_group_counts = @course.course_groups_count
    question_types = @exercise.exercise_questions.pluck(:question_type).uniq
    @exercise_publish_count = get_user_permission_course(exercise_ids, Exercise::PUBLISHED).count #判断是否有已发布的分班
    @exercise_unpublish_count = get_user_permission_course(exercise_ids, Exercise::UNPUBLISHED).count #判断是否有未发布的分班

    if (question_types.size > 1) && question_types.include?(Exercise::SUBJECTIVE) #是否包含主观题,或者是否大于1
      @subjective_type = 1
    else
      @subjective_type = 0
    end

    #初始化值
    @exercise_users_list = [] #答题用户列表
    @exercise_course_groups = [] #当前用户有权限的班级
    @exercise_unanswers = 0 # 未答用户数
    @exercise_answers = 0 #已答用户数
    @exercise_users_count = 0 #全部用户数
    @teacher_review_count = 0 #已评数
    @teacher_unreview_count = 0 #未评数

    #试卷的答题列表页的显示用户
    if @user_course_identity < Course::STUDENT #当前为老师，而且老师只能查看自己班级的/课堂的试卷
      @exercise_current_user_status = 0
      unless @exercise_status == Exercise::UNPUBLISHED
        ex_common_ids = @exercise.common_published_ids(current_user.id)
        @exercise_course_groups = @course.get_ex_published_course(ex_common_ids)
        @exercise_users_list = @exercise.all_exercise_users(current_user.id) #当前老师所在班级的全部学生
        get_exercise_answers(@exercise_users_list, @exercise_status)
      end
    else #当前为学生或者有过答题的
      @ex_user_end_time = @exercise.get_exercise_end_time(current_user.id) #当前用户所看到的剩余时间
      @exercise_all_users = @exercise.get_stu_exercise_users
      get_exercise_answers(@exercise_all_users, @exercise_status) # 未答和已答的
      exercise_current_user = @exercise_all_users.exercise_commit_users(current_user.id)
      if exercise_current_user.exists? #表示为课堂学生或已回答的
        @exercise_current_user_status = 1
        if @exercise.score_open && @exercise_status == Exercise::DEADLINE #勾选了成绩公开且试卷已截止的
          all_user_ids = @exercise_all_users.pluck(:user_id)
          all_user_ids.delete(current_user.id) #删除了当前用户的ID
          @exercise_users_list = @exercise_all_users.exercise_commit_users(all_user_ids).distinct
          @current_user_ex_answers = exercise_current_user #当前用户的回答
        else
          @exercise_users_list = exercise_current_user
        end
      else #表示为未回答的，或未非课堂成员的
        @exercise_current_user_status = 2 #当前用户非课堂成员
      end
    end

    if @exercise_unanswers < 0
      @exercise_unanswers = 0
    end

    #筛选/分类,排序
    order = params[:order]
    order_type = params[:order_type] || "desc"

    if @exercise_users_list.present? && @exercise_users_list.size > 0
      @exercise_users_count = @exercise_users_list.size #当前显示的全部成员数量
      teacher_reviews = @exercise_users_list.exercise_review
      teacher_unreviews = @exercise_users_list.exercise_unreview
      @teacher_review_count = teacher_reviews.size #已评阅
      @teacher_unreview_count = teacher_unreviews.size #未评阅

      #是否评阅
      if params[:review].present?
        review_type = params[:review].first.to_i #已评，则数据为1，未评，则数据为0,前端传过来的为数组
        if review_type == 1
          @exercise_users_list = teacher_reviews
        else
          @exercise_users_list = teacher_unreviews
        end
      end

      #答题状态的选择
      if params[:commit_status].present?
        choose_type = params[:commit_status]
        @exercise_users_list = @exercise_users_list.commit_exercise_by_status(choose_type)
      end

      #班级的选择
      if params[:exercise_group_id].present?
        group_id = params[:exercise_group_id]
        exercise_students = @course_all_members.course_find_by_ids("course_group_id", group_id) #试卷所分班的全部人数
        user_ids = exercise_students.pluck(:user_id).reject(&:blank?)
        @exercise_users_list = @exercise_users_list.exercise_commit_users(user_ids)
      end

      #搜索
      if params[:search].present?
        @exercise_users_list = @exercise_users_list.joins(user: :user_extension).where("CONCAT(lastname, firstname) like ? OR student_id like ?", "%#{params[:search]}%", "%#{params[:search]}%")
      end

      exercise_user_joins = @exercise_users_list.joins(user: :user_extension)

      if order == "student_id"
        @exercise_users_list = exercise_user_joins.order("user_extensions.student_id #{order_type}")
      elsif order == "score"
        @exercise_users_list = exercise_user_joins.order("#{order} #{order_type}")
      else
        @exercise_users_list = exercise_user_joins.order("end_at #{order_type}, start_at #{order_type}")
      end

      @export_ex_users = @exercise_users_list

      @exercise_users_size = @exercise_users_list.size

      # 分页
      @page = params[:page] || 1
      @limit = params[:limit] || 20
      @exercise_users_list = @exercise_users_list.page(@page).per(@limit)
    else
      @exercise_users_list = []
      @export_ex_users = @exercise_users_list
      @exercise_users_size = 0
    end

    if params[:format] == "xlsx"
      if @user_course_identity > Course::ASSISTANT_PROFESSOR
        tip_exception(403, "无权限操作")
      elsif @exercise_status == Exercise::UNPUBLISHED
        normal_status(-1, "试卷未发布")
      elsif (@exercise_users_size == 0) || (@export_ex_users&.exercise_user_committed.size == 0)
        normal_status(-1, "暂无用户提交")
      elsif params[:export].present? && params[:export]
        normal_status(0, "正在下载中")
      else
        respond_to do |format|
          format.xlsx {
            set_export_cookies
            get_export_users(@exercise, @course, @export_ex_users)
            exercise_export_name_ =
              "#{current_user.real_name}_#{@course.name}_#{@exercise.exercise_name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}"
            render xlsx: "#{exercise_export_name_.strip}", template: "exercises/exercise_lists.xlsx.axlsx", locals: {table_columns: @table_columns, exercise_users: @user_columns}
          }
        end
      end
    end
  end

  #导出空白试卷
  def export_exercise
    @request_url = request.base_url
    @exercise_questions = @exercise.exercise_questions.includes(:exercise_choices).order("question_number ASC")
    filename_ = "#{@exercise.user.real_name}_#{@course.name}_#{Time.now.strftime('%Y%m%d_%H%M%S')}.pdf"
    stylesheets = "#{Rails.root}/app/templates/exercise_export/exercise_export.css"
    if params[:export].present? && params[:export]
      normal_status(0, "正在下载中")
    else
      set_export_cookies
      render pdf: 'exercise_export/blank_exercise', filename: filename_, stylesheets: stylesheets, disposition: 'inline', type: "pdf_attachment.content_type", stream: false
    end
  end

  #空白试卷预览页面,仅供测试使用，无其他任何用途
  # def blank_exercise
  #   ActiveRecord::Base.transaction do
  #     begin
  #       @exercise_questions = @exercise.exercise_questions.order("question_number ASC")
  #       challenge_ids = @exercise_questions.joins(:exercise_shixun_challenges).pluck("exercise_shixun_challenges.challenge_id")
  #       get_each_student_exercise(@exercise.id,@exercise_questions,31798)
  #       @games = @exercise_user.user.games.ch_games(challenge_ids)
  #       respond_to do |format|
  #         format.html
  #       end
  #     rescue Exception => e
  #       uid_logger_error(e.message)
  #       tip_exception("没有权限")
  #       raise ActiveRecord::Rollback
  #     end
  #   end
  # end

  #学生的统计结果
  def exercise_result
    exercise_ids = [@exercise.id]
    @exercise_publish_count = get_user_permission_course(exercise_ids, Exercise::PUBLISHED).size #判断是否有已发布的分班
    @exercise_unpublish_count = get_user_permission_course(exercise_ids, Exercise::UNPUBLISHED).size #判断是否有未发布的分班
    @course_all_members = @course.students #课堂的全部学生
    @exercise_all_users = @exercise.exercise_users
    ex_common_ids = @exercise.common_published_ids(current_user.id)
    @exercise_course_groups = @course.get_ex_published_course(ex_common_ids)

    #班级的选择
    if params[:exercise_group_id].present?
      group_id = params[:exercise_group_id]
      exercise_students = @course_all_members.course_find_by_ids("course_group_id", group_id) # 试卷所分班的全部人数
      user_ids = exercise_students.pluck(:user_id).reject(&:blank?)
      @exercise_all_users = @exercise.exercise_users.exercise_commit_users(user_ids)
      @course_all_members_count = @exercise_all_users.size
    else
      @exercise_users_list = @exercise.all_exercise_users(current_user.id)
      @course_all_members_count = @exercise_users_list.size
    end
    @exercise_commit_users = @exercise_all_users.commit_exercise_by_status(1) #试卷的已提交用户
    @exercise_commit_user_ids = @exercise_commit_users.pluck(:user_id).uniq #已提交试卷的全部用户id
    @exercise_commit_user_counts = @exercise_commit_users.size #试卷的已提交用户人数
    @exercise_status = @exercise.get_exercise_status(current_user)

    #提交率
    if @course_all_members_count == 0
      commit_percent = 0.00
      min_score = 0.0
      max_score = 0.0
      average_score = 0.0
      fail_counts = 0
      pass_counts = 0
      good_counts = 0
      best_counts = 0
    else
      commit_percent = (@exercise_commit_user_counts / @course_all_members_count.to_f).round(3)
      exercise_scores = @exercise_commit_users.pluck(:score).reject(&:blank?)
      min_score = exercise_scores.min.present? ? exercise_scores.min : 0.0
      max_score = exercise_scores.max.present? ? exercise_scores.max : 0.0
      total_score = exercise_scores.sum.present? ? exercise_scores.sum : 0.0
      average_score = @exercise_commit_user_counts > 0 ? (total_score.round(1) / @exercise_commit_user_counts).round(1) : 0.0
      question_scores = @exercise.question_scores
      fail_score = question_scores * 0.6.round(2)
      pass_score = question_scores * 0.7.round(2)
      good_score = question_scores * 0.9.round(2)

      fail_counts = exercise_scores.count {|a| a < fail_score}
      pass_counts = exercise_scores.count {|a| a < pass_score && a >= fail_score}
      good_counts = exercise_scores.count {|a| a < good_score && a >= pass_score}
      best_counts = exercise_scores.count {|a| a >= good_score && a <= question_scores}
    end
    @counts_array = {
      :commit_percent => commit_percent,
      :min_score => min_score.to_s,
      :max_score => max_score.to_s,
      :average_score => average_score.to_s,
      :fail_counts => fail_counts,
      :pass_counts => pass_counts,
      :good_counts => good_counts,
      :best_counts => best_counts,
    }

    @exercise_questions = @exercise.exercise_questions&.includes(:exercise_choices, :exercise_answers, :exercise_standard_answers, :exercise_shixun_challenges, :exercise_shixun_answers)

    percent_sort = "desc"

    if params[:sort].present?
      percent_sort = params[:sort]
    end
    # @paging_type = "percent"
    # # 按题型排序
    # if params[:sort].present?
    #   @paging_type = params[:sort].to_s
    # end

    ques_result_all = exercise_commit_result(@exercise_questions, @exercise_commit_user_ids)

    #默认降序排列
    if percent_sort == "desc"
      @question_result_hash = ques_result_all.sort_by {|s| s[:percent]}.reverse
    else
      @question_result_hash = ques_result_all.sort_by {|s| s[:percent]}
    end

    @exercise_questions_count = @exercise_questions.size
    @page = params[:page] || 1
    @limit = params[:limit] || 10
    @question_result_hash = Kaminari.paginate_array(@question_result_hash).page(@page).per(@limit)
  end

  private

  def exercise_params
    params.require(:exercise).permit(:exercise_name, :exercise_description, :course_id, :exercise_status, :user_id, :time,
                                     :publish_time, :end_time, :show_result, :question_random, :choice_random, :is_public,
                                     :score_open, :answer_open, :exercise_bank_id, :unified_setting, :show_statistic)
  end

  def is_course_teacher
    unless @user_course_identity < Course::STUDENT #为老师/助教/管理员
      normal_status(403, "...")
    end
  end

  #检查传入的参数内容是否符合
  def validates_exercise_params
    normal_status(-1, "试卷标题不能为空！") if params[:exercise_name].blank?
    normal_status(-1, "试卷标题不能超过60个字符") if (params[:exercise_name].length > 60)
    normal_status(-1, "试卷须知不能超过100个字符") if (params[:exercise_description].present? &&
      params[:exercise_description].length > 100)
  end

  #判断设置的时间是否合理
  def validate_publish_time
    # 截止时间存在，且截止时间必须大于当前时间或发布时间
    unified_setting = params[:unified_setting]
    publish_course = params[:publish_time_groups]
    if @course.is_end
      normal_status(-1, "课堂已结束不能再修改")
    elsif unified_setting
      ex_group_settings = @exercise.exercise_group_settings
      if ex_group_settings.present?
        p_time_present = ex_group_settings.publish_time_no_null.map(&:publish_time).min
        if p_time_present && p_time_present < Time.now
          normal_status(-1, "设置失败，存在已发布的分班")
        end
      elsif params[:publish_time].blank?
        normal_status(-1, "发布时间不允许为空")
      end
    elsif unified_setting.present? && !unified_setting #非统一设置，分班不能为空
      if publish_course.present?
        course_ids = publish_course.map {|a| a[:course_group_id]}.sum
        publish_t = publish_course.map {|a| a[:publish_time]}
        if course_ids.include?(nil) || course_ids.count == 0
          normal_status(-1, "请选择分班")
        elsif publish_t.include?(nil) || publish_t.count == 0
          normal_status(-1, "发布时间不允许为空")
        end
      else
        normal_status(-1, "请选择分班")
      end
    end
  end

  def get_exercise
    @exercise = Exercise.find_by(id: params[:id])
    if @exercise.blank?
      normal_status(404, "试卷不存在")
    else
      @course = @exercise.course
      normal_status(404, "课堂不存在") if @course.blank?
    end
  end

  def get_exercise_question_counts #获取试卷的问题数及总分数
    exercise_questions = @exercise.exercise_questions
    @exercise_ques_count = exercise_questions.size # 全部的题目数
    @exercise_ques_scores = exercise_questions.pluck(:question_score).sum

    #单选题的数量及分数
    exercise_single_ques = exercise_questions.find_by_custom("question_type", Exercise::SINGLE)
    @exercise_single_ques_count = exercise_single_ques.size
    @exercise_single_ques_scores = exercise_single_ques.pluck(:question_score).sum

    #多选题的数量及分数
    exercise_double_ques = exercise_questions.find_by_custom("question_type", Exercise::MULTIPLE)
    @exercise_double_ques_count = exercise_double_ques.size
    @exercise_double_ques_scores = exercise_double_ques.pluck(:question_score).sum

    # 判断题数量及分数
    exercise_ques_judge = exercise_questions.find_by_custom("question_type", Exercise::JUDGMENT)
    @exercise_ques_judge_count = exercise_ques_judge.size
    @exercise_ques_judge_scores = exercise_ques_judge.pluck(:question_score).sum

    #填空题数量及分数
    exercise_ques_null = exercise_questions.find_by_custom("question_type", Exercise::COMPLETION)
    @exercise_ques_null_count = exercise_ques_null.size
    @exercise_ques_null_scores = exercise_ques_null.pluck(:question_score).sum

    #简答题数量及分数
    exercise_ques_main = exercise_questions.find_by_custom("question_type", Exercise::SUBJECTIVE)
    @exercise_ques_main_count = exercise_ques_main.size
    @exercise_ques_main_scores = exercise_ques_main.pluck(:question_score).sum

    #实训题数量及分数
    exercise_ques_shixun = exercise_questions.find_by_custom("question_type", Exercise::PRACTICAL)
    @exercise_ques_shixun_count = exercise_ques_shixun.size
    @exercise_ques_shixun_scores = exercise_ques_shixun.pluck(:question_score).sum

    @exercise_questions = @exercise_questions&.includes(:exercise_choices, :exercise_shixun_challenges, :exercise_answers, :exercise_shixun_answers, :exercise_answer_comments, :exercise_standard_answers)

  end

  #获取用户有权限的分班
  def get_user_permission_course(exercise_ids, status)
    exercise_status = status.to_i #传入的试卷发布状态
    unpublish_group = []
    course_groups = []
    user_groups_id = @course.charge_group_ids(current_user)
    exercises_all = Exercise.includes(:exercise_group_settings).where(id: exercise_ids)
    exercises_all.each do |exercise|
      if exercise.present?
        if exercise.unified_setting #统一设置只有两种情况，全部发布，全部截止
          exercise_user_status = exercise.get_exercise_status(current_user) #当前用户的能看到的试卷
          if (exercise_user_status == exercise_status) || exercise_status == Exercise::DEADLINE #未发布的情况
            unpublish_group = unpublish_group + user_groups_id
          end
        else
          ex_all_group_settings = exercise.exercise_group_settings
          ex_group_settings = ex_all_group_settings.exercise_group_published.pluck(:course_group_id).uniq #问卷设置的班级
          if exercise_status == Exercise::UNPUBLISHED
            unpublish_group = user_groups_id - ex_group_settings
          elsif exercise_status == Exercise::DEADLINE
            ex_ended_groups = ex_all_group_settings.exercise_group_ended.pluck(:course_group_id).uniq
            ex_and_user = user_groups_id & ex_group_settings #用户已设置的分班
            unpublish_group = unpublish_group + ex_and_user - ex_ended_groups #已发布的全部班级减去截止的全部班级
          else
            ex_ended_groups = ex_all_group_settings.exercise_group_ended.pluck(:course_group_id).uniq
            ex_and_user = user_groups_id & ex_group_settings #用户已设置的分班
            unpublish_group = unpublish_group + ex_and_user - ex_ended_groups
          end
        end
      end
    end
    Rails.logger.info("#####____________unpublish_group_______#######{unpublish_group}")
    unpublish_group = unpublish_group.uniq
    if unpublish_group.count > 0
      course_groups = CourseGroup.by_group_ids(unpublish_group)
    end
    course_groups
  end

  def set_exercise_status(publish_time, end_time)
    time_now_i = Time.now
    if publish_time.present? && (publish_time <= time_now_i) && (end_time > time_now_i)
      2
    elsif publish_time.nil? || (publish_time.present? && publish_time > time_now_i)
      1
    elsif end_time.present? && (end_time <= time_now_i)
      3
    elsif end_time.present? && publish_time.present? && (end_time < publish_time)
      normal_status(-1, "时间设置错误！")
    else
      1
    end
  end

  def check_course_public
    unless @course.is_public == 1 # 0为私有，1为公开
      normal_status(403, "...")
    end
  end

  def check_user_id_start_answer #判断用户在开始答题时，是否有用户id传入,如果为老师，则id必需，否则为当前用户的id
    user_login = params[:login]
    if user_login.blank? && @user_course_identity < Course::STUDENT #id不存在，且当前为老师/管理员等
      normal_status(-1, "请输入学生登陆名！")
    else
      if @user_course_identity < Course::STUDENT || @exercise.score_open
        @ex_answerer = user_login.blank? ? current_user : User.find_by(login: user_login)
      else
        @ex_answerer = current_user
      end

      if @ex_answerer.blank?
        normal_status(404, "答题用户不存在")
      elsif @user_course_identity > Course::STUDENT && !@exercise.is_public
        normal_status(403, "非公开试卷")
      else
        # @exercise_current_user_id = @ex_answerer.id || current_user.id
        @exercise_current_user_id = @ex_answerer.id
      end
    end
  end

  ## 判断开始答题页面的用户权限
  def check_user_on_answer
    if @user_course_identity == Course::STUDENT && @exercise.get_exercise_status(current_user) == Exercise::UNPUBLISHED #试卷未发布，且当前用户不为老师/管理员
      normal_status(-1, "未发布试卷！")
    elsif @user_course_identity > Course::STUDENT && (!@exercise.is_public || (@exercise.is_public && !@exercise.unified_setting)) ##不为课堂成员，且试卷不为公开的,或试卷公开，但不是统一设置的
      normal_status(-1, "试卷暂未公开！")
    end
  end

  def check_exercise_time
    @answer_committed_user = @exercise.exercise_users.exercise_commit_users(current_user.id)&.first
    if @answer_committed_user.blank?
      normal_status(404, "答题用户不存在")
    end
  end

  #打回重做时的初步判断
  def check_exercise_status
    @exercise_users = @exercise.all_exercise_users(current_user.id).commit_exercise_by_status(1) #当前教师所在分班的全部已提交的学生数
    if @exercise.get_exercise_status(current_user) != Exercise::PUBLISHED
      normal_status(-1, "非提交中的试卷不允许打回重做！")
    elsif @exercise_users.count < 1
      normal_status(-1, "暂无人提交试卷！")
    end
  end


  #查看试题页面，当为学生时，除非试卷已截止，或已提交才可以查看
  def check_exercise_is_end
    ex_status = @exercise.get_exercise_status(current_user)
    @ex_user = @exercise.exercise_users.find_by(user_id: @exercise_current_user_id) #该试卷的回答者
    if @user_course_identity > Course::ASSISTANT_PROFESSOR
      if ex_status == Exercise::UNPUBLISHED
        normal_status(-1, "试卷未发布")
      elsif @ex_user.present? && @ex_user.commit_status == 0
        normal_status(-1, "试卷未提交")
      elsif params[:user_id].present? && current_user.id != params[:user_id]
        normal_status(-1, "不能查看他人的试卷")
      end
    end
  end

  #查看试卷是否选择为公开统计
  def check_exercise_public
    if @user_course_identity > Course::ASSISTANT_PROFESSOR #当前为学生,试卷公开统计，且已截止，且已提交
      ex_user = @exercise.exercise_users.exercise_commit_users(current_user.id).first
      unless @exercise.get_exercise_status(current_user) == Exercise::DEADLINE && ex_user.present? && ex_user.commit_status == 1 &&
        @exercise.show_statistic
        normal_status(-1, "学生暂不能查看")
      end
    end
  end

  def get_left_banner_id
    left_banner_content = @course.course_modules.search_by_module_type("exercise")
    if left_banner_content.present?
      @left_banner_id = left_banner_content.first.id
      @left_banner_name = left_banner_content.first.module_name
    else
      normal_status(404, "左侧导航不存在")
    end
  end

  def get_user_answer_status(exercise_questions, user_id, exercise, exercise_user_status)
    @question_status = []
    @exercise_all_questions = []
    ex_question_random = exercise.question_random
    question_answered = 0
    exercise_questions.each_with_index do |q, index|
      if ex_question_random && exercise_user_status != Exercise::DEADLINE
        ques_number = index + 1
      else
        ques_number = q.question_number
      end
      ques_status = 0
      if q.question_type != Exercise::PRACTICAL
        ques_vote = q.exercise_answers.select {|answer| answer.user_id == user_id}

        if ques_vote.present?
          #其他题目，需回答的有内容，才会为已答，否则如内容为空，视为未答
          vote_answer_id = ques_vote.pluck(:exercise_choice_id).reject(&:blank?)
          vote_text_count = ques_vote.pluck(:answer_text).reject(&:blank?).size
          if q.question_type <= Exercise::JUDGMENT #选择题和判断题的时候，需要有选项，才算回答
            if vote_answer_id.size > 0
              ques_status = 1
              question_answered += 1
            end
          else
            if vote_text_count > 0 #主观题，必选有内容，才算回答
              ques_status = 1
              question_answered += 1
            end
          end
        end
      else
        if Myshixun.exists?(user_id: user_id, shixun_id: q.shixun_id)
          ques_status = 1
          question_answered += 1
        end
      end
      question_status = {
        :ques_id => q.id,
        :ques_number => ques_number, #仅问题的显示位置变化，但是问题的question_number 不会变化，与之相关的choice/standard_answer/answer不会变化
        :ques_status => ques_status,
      }
      question_options = {
        :question => q,
        :ques_number => ques_number,
      }
      @question_status = @question_status.push(question_status).sort_by {|k| k[:ques_number]}
      @exercise_all_questions = @exercise_all_questions.push(question_options).sort_by {|k| k[:ques_number]}
    end
  end

  #下一步也有check_on_users再进行判断
  def only_student_in
    if @user_course_identity < Course::STUDENT
      normal_status(-1, "老师身份不允许进入")
    end
  end

  #判断实训是否已选择
  def commit_shixun_present
    question_shixun_ids = @exercise.exercise_questions.pluck(:shixun_id).reject(&:blank?)
    shixun_id = params[:shixun_id]
    @shixun = Shixun.find_by(id: shixun_id)
    if shixun_id.present? && question_shixun_ids.include?(shixun_id)
      normal_status(-1, "该实训已选择！")
    elsif @shixun.blank?
      normal_status(-1, "该实训不存在！")
    end
  end

end