'use strict';

/**
 * 中职组题库模型 - ZhongzhiQuestion
 *
 * 存储中职组比赛题目，支持单选、多选、判断等多种题型。
 * 表名：zhongzhi_questions
 */

module.exports = app => {
  const { STRING, INTEGER, JSON, DATE } = app.Sequelize;

  const ZhongzhiQuestion = app.model.define('zhongzhi_question', {
    // 主键，自增
    question_uid: {
      type: INTEGER,
      primaryKey: true,
      autoIncrement: true,
      comment: '题目唯一标识',
    },
    // 题目内容
    question: {
      type: STRING(1000),
      allowNull: false,
      comment: '题目内容',
    },
    // 正确答案
    answer: {
      type: STRING(500),
      allowNull: false,
      comment: '正确答案',
    },
    // 题目类型：single(单选) / multiple(多选) / judge(判断)
    question_type: {
      type: STRING(20),
      allowNull: false,
      comment: '题目类型',
    },
    // 选项（JSON 格式，如 ["A. xxx", "B. xxx", "C. xxx", "D. xxx"]）
    options: {
      type: JSON,
      allowNull: true,
      defaultValue: null,
      comment: '选项',
    },
    // 题目分值
    score: {
      type: INTEGER,
      allowNull: false,
      defaultValue: 0,
      comment: '题目分值',
    },
    // 排序序号
    sort_order: {
      type: INTEGER,
      allowNull: false,
      defaultValue: 0,
      comment: '排序序号',
    },
    // 记录创建时间
    created_at: {
      type: DATE,
      allowNull: false,
      defaultValue: app.Sequelize.literal('CURRENT_TIMESTAMP'),
      comment: '创建时间',
    },
    // 记录更新时间
    updated_at: {
      type: DATE,
      allowNull: false,
      defaultValue: app.Sequelize.literal('CURRENT_TIMESTAMP'),
      comment: '更新时间',
    },
  }, {
    tableName: 'zhongzhi_questions',
    timestamps: false,
    underscored: true,
    indexes: [
      {
        fields: ['question_type'],
      },
      {
        fields: ['sort_order'],
      },
    ],
  });

  return ZhongzhiQuestion;
};