<?php
/**
 * Catalog hooks that capture price revisions.
 *
 * @package Kayvandra\MarginBeacon
 */

declare(strict_types=1);

namespace Kayvandra\MarginBeacon\Application\Provenance;

/**
 * Listens for WooCommerce product price mutations outside the storefront.
 */
final class PriceRevisionObserver {

	/**
	 * @return void
	 */
	public function register() {
		add_action( 'woocommerce_update_product', array( $this, 'on_product' ), 20, 1 );
		add_action( 'woocommerce_new_product', array( $this, 'on_product' ), 20, 1 );
		add_action( 'woocommerce_update_product_variation', array( $this, 'on_variation' ), 20, 1 );
		add_action( 'woocommerce_new_product_variation', array( $this, 'on_variation' ), 20, 1 );
		// REST / CRUD object saves.
		add_action( 'woocommerce_after_product_object_save', array( $this, 'on_product_object' ), 20, 1 );
	}

	/**
	 * @param int $product_id Product ID.
	 * @return void
	 */
	public function on_product( $product_id ) {
		if ( is_admin() || ( defined( 'REST_REQUEST' ) && REST_REQUEST ) || ( defined( 'WP_CLI' ) && WP_CLI ) ) {
			( new PriceRevisionWriter() )->observe_ids( (int) $product_id, 0, $this->source() );
		}
	}

	/**
	 * @param int $variation_id Variation ID.
	 * @return void
	 */
	public function on_variation( $variation_id ) {
		if ( ! function_exists( 'wc_get_product' ) ) {
			return;
		}
		if ( ! ( is_admin() || ( defined( 'REST_REQUEST' ) && REST_REQUEST ) || ( defined( 'WP_CLI' ) && WP_CLI ) ) ) {
			return;
		}
		$product = wc_get_product( (int) $variation_id );
		if ( ! $product ) {
			return;
		}
		( new PriceRevisionWriter() )->observe_product( $product, $this->source() );
	}

	/**
	 * @param \WC_Product $product Product object.
	 * @return void
	 */
	public function on_product_object( $product ) {
		if ( ! $product || ! is_object( $product ) ) {
			return;
		}
		// Avoid double-write when classic hooks already fired; still catch REST-only paths.
		if ( ! ( is_admin() || ( defined( 'REST_REQUEST' ) && REST_REQUEST ) || ( defined( 'WP_CLI' ) && WP_CLI ) ) ) {
			return;
		}
		( new PriceRevisionWriter() )->observe_product( $product, $this->source() );
	}

	/**
	 * @return string
	 */
	private function source() {
		if ( defined( 'WP_CLI' ) && WP_CLI ) {
			return 'cli';
		}
		if ( defined( 'REST_REQUEST' ) && REST_REQUEST ) {
			return 'rest';
		}
		return 'admin';
	}
}