'use strict';

module.exports = {
  async up(queryInterface, Sequelize) {
    await queryInterface.createTable('plan_lessons', {
      id:        { type: Sequelize.BIGINT, primaryKey: true, autoIncrement: true },
      plan_id:   { type: Sequelize.BIGINT, allowNull: false, references: { model: 'tier_plans', key: 'plan_id' }, onDelete: 'CASCADE' },
      lesson_id: { type: Sequelize.BIGINT, allowNull: false, unique: true, references: { model: 'lessons', key: 'lesson_id' }, onDelete: 'CASCADE' },
      createdAt: { type: Sequelize.DATE, allowNull: false },
      updatedAt: { type: Sequelize.DATE, allowNull: false },
    });

    await queryInterface.addIndex('plan_lessons', ['plan_id']);
  },

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