/**
 * @param { import("knex").Knex } knex
 * @returns { Promise<void> }
 */
exports.up = function(knex) {
  return knex.schema.createTable('page_layouts', (table) => {
    table.uuid('id').primary().defaultTo(knex.raw('(UUID())'));
    table.string('name').notNullable();
    table.uuid('object_id').notNullable();
    table.boolean('is_default').defaultTo(false);
    table.json('layout_config').notNullable();
    table.text('description');
    table.timestamps(true, true);

    // Foreign key to object_definitions
    table.foreign('object_id').references('id').inTable('object_definitions').onDelete('CASCADE');

    // Index for faster lookups
    table.index(['object_id', 'is_default']);
  });
};

/**
 * @param { import("knex").Knex } knex
 * @returns { Promise<void> }
 */
exports.down = function(knex) {
  return knex.schema.dropTable('page_layouts');
};