class Subjects::ShixunUsedInfoService < ApplicationService
  attr_reader :subject, :stages
  def initialize(subject)
    @subject = subject
    @stages = subject.stages.includes(shixuns: [myshixuns: :games, homework_commons_shixuns: [homework_common: :course]])
  end

  def call
    shixun_infos = []
    stages.each do |stage|
      position = stage.position
      stage.shixuns.each_with_index do |shixun, index|
        stage = "#{position}-#{index+1}"
        name = shixun.name
        challenge_count = shixun.challenges_count
        course_count = shixun.homework_commons.map{|hc| hc.course_id}.uniq.size
        school_count = shixun.homework_commons.map{|hc| hc.course&.school_id}.uniq.size
        used_count = shixun.myshixuns_count
        passed_count = shixun.myshixuns.select{|m| m.status == 1}.size
        evaluate_count = shixun.myshixuns.map{|m| m.output_times }.sum
        passed_ave_time = passed_count > 0 ? shixun.myshixuns.map{|m| m.total_cost_time}.sum : 0
        shixun_infos << {stage: stage, name: name, challenge_count: challenge_count, course_count: course_count,
                         school_count: school_count, used_count: used_count, passed_count: passed_count,
                         evaluate_count: evaluate_count, passed_ave_time: passed_ave_time, shixun_id: shixun.id}
      end
    end
    shixun_infos
  end

end