class CnmoocsService
  include ApplicationHelper
  include GamesHelper

  def get_resources_data params

    resources = []
    if params[:level].to_s == "1"
      subjects = Subject.find_by_sql("SELECT subjects.id, subjects.name, subjects.status, COUNT(myshixuns.id) AS myshixun_member_count
                            FROM myshixuns, stage_shixuns, subjects WHERE myshixuns.shixun_id = stage_shixuns.shixun_id
                            AND stage_shixuns.subject_id = subjects.id AND `subjects`.`hidden` = 0 AND `subjects`.`status` = 2
                            GROUP BY subjects.id ORDER BY myshixun_member_count DESC")


      subjects.each do |subject|
        resources << {resourceId: subject.id, parentId: nil, resourceName: subject.name, accessType: 0, nodeType: 0,
                     resourceType: 2}
      end

    elsif params[:level].to_s == "2"
      return {error: -1, messages: "请求二级及其更高目录时，parentId不能为空"} if params[:parentId].blank?
      stages = Stage.where(:subject_id => params[:parentId])
      stages.each do |stage|
        resources << {resourceId: stage.id, parentId: params[:parentId], resourceName: stage.name, accessType: 0, nodeType: 0,
                   resourceType: 2}
      end

    elsif params[:level].to_s == "3"
      return {error: -1, messages: "请求二级及其更高目录时，parentId不能为空"} if params[:parentId].blank?
      shixun_ids = StageShixun.where(:stage_id => params[:parentId]).pluck(:shixun_id)
      shixuns = Shixun.where(:id => shixun_ids)
      shixuns.each do |shixun|
        resources << {resourceId: shixun.id, parentId: params[:parentId], resourceName: shixun.name, accessType: 2,
                     nodeType: 1, resourceType: 1}
      end

    end
    {error: 0, messages: "请求成功",
     data: {resources: resources} }
  end

  def search_resources params
    shixuns = Shixun.select([:id, :identifier, :name, :myshixuns_count, :averge_star, :challenges_count, :trainee]).
        where(status: 2, hidden: 0).where("name like ?", "%#{params[:name]}%")

    shixuns = shixuns.order("myshixuns_count desc")
    shixun_list = shixun_data shixuns
    {error: 0, messages: "请求成功",
     data: shixun_list }
  end

  def find_user params
    c_user = CnmoocUser.find_by_uuid(params[:userName])
    if c_user
      {error: 0, messages: "找到用户", data: { userId: c_user.user_id } }
    else
      {error: -1, messages: "找不到用户"}
    end
  end

  def create_user(params)
    c_user = CnmoocUser.find_by_uuid(params[:userName])

    if c_user.present?
      return { error: -1, messages: '用户已存在' }
    end
    c_user = CnmoocUser.new(uuid: params[:userName], name: params[:name])

    mail = params[:email] || c_user.generate_email
    name = params[:name] || "好大学_#{params[:userName]}"
    login =  generate_login('m')
    Rails.logger.info("#######mail: #{mail}， #{name}, #{login}")
    create_params = {
      lastname: name,
      mail: mail,
      mail_notification: mail,
      password: OauthController::DEFAULT_PASSWORD,
      certification: 1
    }
    user = User.new(create_params)
    # login 有问题，只能这样赋值
    user.login = login
    ActiveRecord::Base.transaction do
      user.save!

      UserExtensions.create!(user_id: user.id, school_id: School.first.id, identity: 4, gender: 0)

      c_user.user_id = user.id
      c_user.save!
    end

    { error: 0, messages: "创建成功", data: { userId: user.id } }
  end

  def login_educoder params
    user, last_login_on = User.try_to_login(params[:mail], params[:password])
    if user
      self.logged_user = user
      {error: 0, messages: "登录成功"}
    else
      {error: -1, messages: "登录失败，请检查邮箱和密码是否正确"}
    end

  end

  def source_url(params, token)
    shixun = Shixun.find_by_id(params[:resourceId])
    if shixun.blank?
      return { error: -1, messages: '资源不存在' }
    end
    { error: 0, messages: '成功', data: {accessUrl: "#{Redmine::Configuration['educoder_domain']}/shixuns/#{shixun.identifier}/challenges?authToken=#{token.value}" }}
  end

  def get_students_data params
    shixun = Shixun.find_by_id params[:resourceId]
    return {error: -1, messages: "资源id不对，请使用资源的id查找"} if shixun.blank?
    myshixun = shixun.myshixuns.where(:user_id => params[:userId]).includes(:games).first
    if myshixun.present?
      score = myshixun.total_score
      time = 0
      myshixun.games.each do |game|
        time += game.consumes_time_int
      end
      {error: 0, messages: '成功', data: {experiment: {time: time, totalTime: score * 10}}}
    else
      {error: -1, messages: '用户还未开始学习此资源'}
    end
  end

  private
  def shixun_data shixuns
    shixun_list = []
    shixuns.includes(:tag_repertoires).each do |shixun|
      tag_name = shixun.tag_repertoires.first.try(:name)
      level = %W(初级 中级 高级 顶级)[shixun.trainee - 1]
      shixun_list << {identifier: shixun.identifier, name: shixun.name, students_count: shixun.myshixuns_count,
                      challenges_count: shixun.challenges_count, score_info: shixun.averge_star, level: level}

    end
    {resources: shixun_list}
  end

  # 为新创建的用户随机生成以m为前缀的用户名，m表示该用户是用邮箱注册
  def generate_login(login_pre)
    us = UsersService.new
    us.generate_user_login(login_pre)
  end
end