'use strict';

/**
 * 选择题模型 - ChoiceQuestion
 *
 * 对应 choice_questions 表，存储所有组别的选择题（单选 + 多选）。
 * 通过 group 字段区分中职组(zhongzhi)和高职组(gaozhi)。
 */
module.exports = app => {
  const { STRING, INTEGER, DATE, JSON: JSON_TYPE, TEXT } = app.Sequelize;

  return app.model.define('ChoiceQuestion', {
    id: {
      type: INTEGER,
      primaryKey: true,
      autoIncrement: true,
      comment: '主键ID',
    },
    group: {
      type: STRING(20),
      allowNull: false,
      comment: '组别：zhongzhi/gaozhi',
    },
    question: {
      type: TEXT,
      allowNull: false,
      comment: '题目内容',
    },
    options: {
      type: JSON_TYPE,
      allowNull: false,
      comment: '选项列表 [{ key: "A", text: "..." }, ...]',
    },
    answer: {
      type: STRING(10),
      allowNull: false,
      comment: '正确答案（如 A / AB / ABCD）',
    },
    score: {
      type: INTEGER,
      allowNull: false,
      defaultValue: 5,
      comment: '分值',
    },
    sort_order: {
      type: INTEGER,
      allowNull: false,
      defaultValue: 0,
      comment: '排序',
    },
    created_at: {
      type: DATE,
      defaultValue: app.Sequelize.NOW,
      comment: '创建时间',
    },
    updated_at: {
      type: DATE,
      defaultValue: app.Sequelize.NOW,
      comment: '更新时间',
    },
  }, {
    tableName: 'choice_questions',
    timestamps: true,
    createdAt: 'created_at',
    updatedAt: 'updated_at',
  });
};