import type { Knex } from 'knex';

export async function up(knex: Knex): Promise<void> {
  await knex.schema.createTable('pantry_items', (table) => {
    table.uuid('id').primary().defaultTo(knex.raw('gen_random_uuid()'));
    table.uuid('user_id').notNullable().references('id').inTable('users').onDelete('CASCADE');
    table.string('item_name', 255).notNullable();
    table.string('item_name_lower', 255).notNullable();
    table.integer('quantity').notNullable().checkPositive();
    table.timestamp('last_modified', { useTz: true }).defaultTo(knex.fn.now());
    table.timestamp('created_at', { useTz: true }).defaultTo(knex.fn.now());
    table.timestamp('updated_at', { useTz: true }).defaultTo(knex.fn.now());
  });

  await knex.raw(`CREATE UNIQUE INDEX idx_pantry_user_item ON pantry_items (user_id, item_name_lower)`);
  await knex.raw(`CREATE INDEX idx_pantry_user_id ON pantry_items (user_id)`);
  await knex.raw(`CREATE INDEX idx_pantry_last_modified ON pantry_items (user_id, last_modified)`);
}

export async function down(knex: Knex): Promise<void> {
  await knex.schema.dropTableIfExists('pantry_items');
}