/**
 * Product unit weight and minimum purchase quantity, plus per-method weight
 * limits for shipping (max weight and free-shipping weight cap).
 * @param {import('node-pg-migrate').MigrationBuilder} pgm
 */
export const up = (pgm) => {
  pgm.sql(
    `ALTER TABLE catalog_products ADD COLUMN IF NOT EXISTS unit_weight_kg numeric(8,3) NOT NULL DEFAULT 1`,
  );
  pgm.sql(
    `ALTER TABLE catalog_products ADD COLUMN IF NOT EXISTS min_purchase_qty integer NOT NULL DEFAULT 1`,
  );
  pgm.sql(`ALTER TABLE shipping_methods ADD COLUMN IF NOT EXISTS max_weight_kg numeric(8,3) NULL`);
  pgm.sql(
    `ALTER TABLE shipping_methods ADD COLUMN IF NOT EXISTS free_shipping_max_weight_kg numeric(8,3) NULL`,
  );
};

export const down = (pgm) => {
  pgm.sql(`ALTER TABLE shipping_methods DROP COLUMN IF EXISTS free_shipping_max_weight_kg`);
  pgm.sql(`ALTER TABLE shipping_methods DROP COLUMN IF EXISTS max_weight_kg`);
  pgm.sql(`ALTER TABLE catalog_products DROP COLUMN IF EXISTS min_purchase_qty`);
  pgm.sql(`ALTER TABLE catalog_products DROP COLUMN IF EXISTS unit_weight_kg`);
};