'use strict';

/**
 * 迁移文件：创建试卷题目表（exam_questions）
 * 存储各组别的试卷题目
 */

module.exports = {
  up: async (queryInterface, Sequelize) => {
    const { INTEGER, STRING, TEXT, DATE } = Sequelize;

    await queryInterface.createTable('exam_questions', {
      id: {
        type: INTEGER,
        primaryKey: true,
        autoIncrement: true,
        allowNull: false,
        comment: '题目唯一标识',
      },
      group: {
        type: STRING(20),
        allowNull: false,
        comment: '题目所属组别',
      },
      title: {
        type: STRING(200),
        allowNull: false,
        comment: '题目标题',
      },
      content: {
        type: TEXT,
        allowNull: false,
        comment: '题目内容描述',
      },
      score: {
        type: INTEGER,
        allowNull: false,
        comment: '题目分值',
      },
      sort_order: {
        type: INTEGER,
        allowNull: false,
        defaultValue: 0,
        comment: '排序序号',
      },
      created_at: {
        type: DATE,
        allowNull: false,
        comment: '创建时间',
      },
      updated_at: {
        type: DATE,
        allowNull: false,
        comment: '更新时间',
      },
    });

    await queryInterface.addIndex('exam_questions', ['group'], {
      name: 'idx_exam_questions_group',
    });
    await queryInterface.addIndex('exam_questions', ['group', 'sort_order'], {
      name: 'idx_exam_questions_group_sort',
    });
  },

  down: async (queryInterface) => {
    await queryInterface.dropTable('exam_questions');
  },
};