'use strict';

module.exports = {
  async up(queryInterface, Sequelize) {
    await queryInterface.createTable('course_purchases', {
      id:               { type: Sequelize.BIGINT, primaryKey: true, autoIncrement: true },
      user_id:          { type: Sequelize.BIGINT, allowNull: false, references: { model: 'users',    key: 'user_id'  }, onDelete: 'CASCADE'  },
      product_id:       { type: Sequelize.BIGINT, allowNull: false, references: { model: 'products', key: 'id'       }, onDelete: 'RESTRICT' },
      amount:           { type: Sequelize.DECIMAL(10, 2), allowNull: false },
      currency:         { type: Sequelize.STRING(10), allowNull: false, defaultValue: 'USD' },
      status:           { type: Sequelize.ENUM('pending', 'completed', 'failed', 'cancelled', 'refunded'), allowNull: false, defaultValue: 'pending' },
      provider:         { type: Sequelize.STRING(50), allowNull: false, defaultValue: 'paypal' },
      provider_payload: { type: Sequelize.JSONB, allowNull: true, defaultValue: {} },
      expires_at:       { type: Sequelize.DATE, allowNull: true },   // null = lifetime access
      paid_at:          { type: Sequelize.DATE, allowNull: true },
      createdAt:        { type: Sequelize.DATE, allowNull: false },
      updatedAt:        { type: Sequelize.DATE, allowNull: false },
      deletedAt:        { type: Sequelize.DATE, allowNull: true },
    });

    await queryInterface.addIndex('course_purchases', ['user_id']);
    await queryInterface.addIndex('course_purchases', ['product_id']);
    await queryInterface.addIndex('course_purchases', ['status']);
  },

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