module.exports = {
  up: async (queryInterface, Sequelize) => {
    await queryInterface.createTable('backlinks', {
      id: {
        type: Sequelize.UUID,
        allowNull: false,
        primaryKey: true,
      },
      userId: {
        type: Sequelize.UUID,
        allowNull: false,
        references: {
          model: 'users',
        },
      },
      documentId: {
        type: Sequelize.UUID,
        allowNull: false,
        references: {
          model: 'documents',
        },
      },
      reverseDocumentId: {
        type: Sequelize.UUID,
        allowNull: false,
        references: {
          model: 'documents',
        },
      },
      createdAt: {
        type: Sequelize.DATE,
        allowNull: false,
      },
      updatedAt: {
        type: Sequelize.DATE,
        allowNull: false,
      },
    });
    await queryInterface.addIndex('backlinks', ['documentId']);
  },

  down: async (queryInterface, Sequelize) => {
    await queryInterface.dropTable('backlinks');
    await queryInterface.removeIndex('backlinks', ['documentId']);
  },
};