class Weapps::AttendancesController < ApplicationController
  before_action :require_login
  before_action :find_course, only: [:create, :index, :student_attendances]
  before_action :find_attendance, except: [:create, :index, :student_attendances]
  before_action :user_course_identity
  before_action :teacher_allowed, only: [:create]

  def create
    ActiveRecord::Base.transaction do
      attendance = @course.course_attendances.create!(create_params.merge(user_id: current_user.id))
      unless params[:group_ids].blank?
        group_ids = @course.charge_group_ids(current_user) & params[:group_ids]
        group_ids.each do |group_id|
          @course.course_attendance_groups.create!(course_group_id: group_id, course_attendance: attendance)
        end
      else
        @course.course_attendance_groups.create!(course_group_id: 0, course_attendance: attendance)
      end
      render_ok({attendance_id: attendance.id})
    end
  end

  def index

  end

  def student_attendances
    tip_exception(403, "") if @user_course_identity != Course::STUDENT
    member = @course.students.find_by(user_id: current_user.id)
    current_date = Date.current
    current_end_time = Time.current.strftime("%H:%M:%S")

    # 先算出该学生所在分班的签到id
    # 分班id为0 表示签到不限制分班
    group_ids = [member&.course_group_id.to_i, 0]
    all_attendance_ids = @course.course_attendance_groups.where(course_group_id: group_ids).pluck(:course_attendance_id)

    @history_attendances = @course.course_attendances.where(id: all_attendance_ids.uniq).
      where("attendance_date < '#{current_date}' or (attendance_date = '#{current_date}' and end_time < '#{current_end_time}')").order("id desc")
    @current_attendance = @course.course_attendances.where(id: all_attendance_ids.uniq).
      where("attendance_date = '#{current_date}' and start_time <= '#{current_end_time}' and end_time > '#{current_end_time}'").take
    @history_count = @history_attendances.size

    student_attendance_ids = @history_attendances.pluck(:id)
    student_attendance_ids += @current_attendance.present? ? [@current_attendance.id] : []

    if student_attendance_ids.uniq.blank?
      @normal_count = 0
      @leave_count = 0
      @absence_count = 0
    else
      @normal_count = @course.course_member_attendances.where(course_attendance_id: student_attendance_ids, attendance_status: 1).size
      @leave_count = @course.course_member_attendances.where(course_attendance_id: student_attendance_ids, attendance_status: 2).size
      @absence_count = student_attendance_ids.uniq.size - @normal_count - @leave_count
    end

    @all_history_count = @history_attendances.size
    @history_attendances = paginate @history_attendances.includes(:course_member_attendances)
  end

  def show

  end

  def update
    tip_exception(403, "") unless @user_course_identity < Course::PROFESSOR || @attendance.user_id == current_user.id
    @attendance.update!(name: params[:name])
    render_ok
  end

  def destroy

  end

  private
  def create_params
    params.permit(:name, :mode, :attendance_date, :start_time, :end_time)
  end

  def find_attendance
    @attendance = CourseAttendance.find params[:id]
    @course = @attendance.course
  end
end