'use strict';

// quiz_attempts.started_at and quiz_attempts.status were added via raw SQL
// during an earlier development session. The assessment_sessions table now owns
// session lifecycle; quiz_attempts are always-graded completed records only.
module.exports = {
  async up(queryInterface, Sequelize) {
    const tableDesc = await queryInterface.describeTable('quiz_attempts');
    if (tableDesc.started_at) await queryInterface.removeColumn('quiz_attempts', 'started_at');
    if (tableDesc.status)     await queryInterface.removeColumn('quiz_attempts', 'status');
  },

  async down(queryInterface, Sequelize) {
    await queryInterface.addColumn('quiz_attempts', 'started_at', { type: Sequelize.DATE, allowNull: true });
    await queryInterface.addColumn('quiz_attempts', 'status',     { type: Sequelize.STRING(20), allowNull: true });
  },
};