/**
 * @param { import("knex").Knex } knex
 * @returns { Promise<void> }
 */
exports.up = function(knex) {
  return knex.schema
    .createTable('categories', function (table) {
      table.uuid('id').primary().defaultTo(knex.raw(`gen_random_uuid()`));
      table.string('name').notNullable();
      table.timestamps(true, true);
    })
    .alterTable('places', function(table) {
      table.uuid('category_id').references('id').inTable('categories')
    })
    .createTable('subcategories', function(table) {
      table.uuid('id').primary().defaultTo(knex.raw(`gen_random_uuid()`));
      table.string('name').notNullable();
      table.uuid('category_id').references('id').inTable('categories').onDelete('CASCADE');
      table.timestamps(true, true);
    })
    .createTable('place_subcategories', function(table) {
      table.uuid('place_id').references('id').inTable('places').onDelete('CASCADE');
      table.uuid('subcategory_id').references('id').inTable('subcategories').onDelete('CASCADE');
    })
};

/**
 * @param { import("knex").Knex } knex
 * @returns { Promise<void> }
 */
exports.down = function(knex) {
  knex.schema.alterTable('places', function(table) {
    table.dropColumn('category_id');
  });
  knex.schema.dropTable('categories');
  knex.schema.dropTable('subcategories');
  knex.schema.dropTable('place_subcategories');
};