'use strict';

module.exports = {
  up: async (queryInterface, Sequelize) => {
    await queryInterface.createTable('choice_questions', {
      id: {
        type: Sequelize.INTEGER,
        primaryKey: true,
        autoIncrement: true,
        allowNull: false,
        comment: '题目ID',
      },
      group: {
        type: Sequelize.STRING(20),
        allowNull: false,
        comment: '组别：zhongzhi/gaozhi',
      },
      question: {
        type: Sequelize.TEXT,
        allowNull: false,
        comment: '题目内容',
      },
      options: {
        type: Sequelize.JSON,
        allowNull: false,
        comment: '选项列表 [{ key: "A", text: "..." }, ...]',
      },
      answer: {
        type: Sequelize.STRING(10),
        allowNull: false,
        comment: '正确答案（如 A / AB / ABCD）',
      },
      score: {
        type: Sequelize.INTEGER,
        allowNull: false,
        defaultValue: 5,
        comment: '分值',
      },
      sort_order: {
        type: Sequelize.INTEGER,
        allowNull: false,
        defaultValue: 0,
        comment: '排序',
      },
      created_at: {
        type: Sequelize.DATE,
        allowNull: false,
        defaultValue: Sequelize.literal('CURRENT_TIMESTAMP'),
        comment: '创建时间',
      },
      updated_at: {
        type: Sequelize.DATE,
        allowNull: false,
        defaultValue: Sequelize.literal('CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP'),
        comment: '更新时间',
      },
    }).then(() => {
      return Promise.all([
        queryInterface.addIndex('choice_questions', ['group'], { name: 'idx_choice_group' }),
        queryInterface.addIndex('choice_questions', ['sort_order'], { name: 'idx_choice_sort' }),
      ]);
    });
  },

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