#coding=utf-8
# st 0：实践任务；1：选择题任务
# show_type:  [1, "图片"], [2, "apk/exe"], [3, "txt"], [4, "html"]
# modify_time： 与games表的modify_time联合使用，2个字段一致，则表示测试集未修改，反之，被修改
class Challenge < ActiveRecord::Base
  default_scope :order => 'position'
  belongs_to :shixun, :touch=> true, counter_cache: true
  belongs_to :user
  has_many :challenge_samples, :dependent => :destroy
  has_many :test_sets, :dependent => :destroy
  has_many :challenge_tags, :dependent => :destroy
  has_many :games, :dependent => :destroy
  has_many :challenge_chooses, :dependent => :destroy
  has_many :homework_challenge_settings
  has_many :praise_tread, as: :praise_tread_object, dependent: :destroy
  has_one :praise_tread_cache, as: :object, dependent: :destroy
  has_many :tidings
  acts_as_attachable
  validates_presence_of :subject
  # validates_presence_of :score
  validates_presence_of :task_pass
  validates_length_of :subject, :maximum => 255
  scope :min, lambda { select([:id, :subject, :position, :shixun_id, :st, :score, :path, :task_pass, :modify_time, :web_route, :answer]) }
  scope :choose_type, lambda{where(st: 1)}
  scope :practice_type, lambda{where(st: 0)}

  def game_difficulty
    str = "简单"
    case self.difficulty
      when 1
        str = "简单"
      when 2
        str = "中等"
      when 3
        str = "困难"
    end
    str
  end

  ## 用户关卡状态 0: 不能开启实训; 1:直接开启; 2表示已完成
  def user_tpi_status(user_id)
    # todo: 以前没加索引导致相同关卡,同一用户有多个games
    game = self.games.where(user_id: user_id).last
    status =
        if game.blank?
          self.position == 1 ? 1 : 0
        elsif game.status == 2
          2
        else
          1
        end
  end

  def challenge_file_show_type
    [[1, "图片"], [2, "apk/exe"], [3, "txt"], [4, "html"]]
  end
  alias :cfst :challenge_file_show_type

  def choose_correct_num
    num = 0
    self.challenge_chooses.each do |choose|
      outputs = ChooseOutputs.where(:challenge_choose_id => choose.id, :user_id => User.current.id).first
      if outputs.nil?
        num = nil
      else
        num += (outputs.correct ? 1 : 0)
      end
    end
    return num
  end

  def choose_score
    score = 0
    if self.st == 1
      self.challenge_chooses.each do |choose|
        score += choose.score.to_i
      end
    else
      return self.score
    end
    return score
  end

  def choose_tags_num
    num = 0
    self.challenge_chooses.includes(:challenge_tags).each do |choose|
      num += choose.challenge_tags.count
    end
    return num
  end

  def tags_show
    if self.challenge_tags.nil?
      "--"
    else
      self.try(:challenge_tags).map(&:name).join(";")
    end
  end

  def next_challenge
    challenge_count = Challenge.where(:shixun_id => self.shixun_id).count
    if self.position != challenge_count
      Challenge.where(:position => (self.position + 1), :shixun_id => self.shixun).first
    end
  end

  def prev_challenge
    render_404 if self.position == 1
    Challenge.where(:position => (self.position - 1), :shixun_id => self.shixun).first
  end

  def last_challenge
    render_404 if self.position < 2
    position = self.position - 1
    Challenge.where(:position => position, :shixun_id => self.shixun).first
  end

  def current_user_game
    myshixun = Myshixun.where(:shixun_id => self.shixun.id, :user_id => User.current.id).first
    game = Game.where(:myshixun_id => myshixun, :challenge_id => self.id).first
  end

  # # 当前用户开启的实训中应进入的game关卡
  # # 为了节约性能而写的
  # def game
  #   self.games.where(:user_id => )
  # end

  def user_myshixun
    Myshixun.where(:shixun_id => self.shixun.id, :user_id => User.current.id).first
  end

  # 正确答案
  def right_answers
    answer = ""
    self.challenge_questions.each do |ans|
      if ans.right_key
        answer << (ans.position + 65).chr
      end
    end
    return answer
  end

  # 通关的games
  def passed_games
    self.games.where(:status => 2)
  end

end