'use strict';

module.exports = {
  async up(queryInterface, Sequelize) {
    await queryInterface.createTable('quiz_attempts', {
      attempt_id:    { type: Sequelize.BIGINT, primaryKey: true, autoIncrement: true },
      uuid:          { type: Sequelize.UUID, defaultValue: Sequelize.UUIDV4, unique: true },
      user_id:       { type: Sequelize.BIGINT, allowNull: false, references: { model: 'users', key: 'user_id' }, onDelete: 'CASCADE' },
      quiz_id:       { type: Sequelize.BIGINT, allowNull: true, references: { model: 'unit_quizzes',       key: 'quiz_id'       }, onDelete: 'SET NULL' },
      assessment_id: { type: Sequelize.BIGINT, allowNull: true, references: { model: 'course_assessments', key: 'assessment_id' }, onDelete: 'SET NULL' },
      answers:       { type: Sequelize.JSONB, allowNull: false, defaultValue: {} },
      total_points:  { type: Sequelize.INTEGER, allowNull: false, defaultValue: 0 },
      earned_points: { type: Sequelize.INTEGER, allowNull: false, defaultValue: 0 },
      score:         { type: Sequelize.INTEGER, allowNull: false, defaultValue: 0 },
      passed:        { type: Sequelize.BOOLEAN, allowNull: false, defaultValue: false },
      createdAt:     { type: Sequelize.DATE, allowNull: false },
      updatedAt:     { type: Sequelize.DATE, allowNull: false },
    });

    await queryInterface.addIndex('quiz_attempts', ['user_id']);
    await queryInterface.addIndex('quiz_attempts', ['quiz_id']);
    await queryInterface.addIndex('quiz_attempts', ['assessment_id']);
  },

  async down(queryInterface) {
    await queryInterface.dropTable('quiz_attempts');
  },
};