<?php
/**
 * Basic compatibility detection (Free FR-096 lite).
 *
 * @package Kayvandra\MarginBeacon
 */

declare(strict_types=1);

namespace Kayvandra\MarginBeacon\Application\Compatibility;

use Kayvandra\MarginBeacon\Support\Constants;

/**
 * Detects known pricing / multi-currency plugins and stores state.
 */
final class CompatibilityRegistry {

	/**
	 * Known plugin file => meta.
	 *
	 * @return array<string,array{name:string,category:string,impact:string}>
	 */
	public static function known_plugins() {
		return array(
			'woocommerce-currency-switcher/index.php' => array(
				'name'     => 'FOX - Currency Switcher',
				'category' => 'multi_currency',
				'impact'   => 'Orders in non-base currency are Unsupported.',
			),
			'woocommerce-multicurrency/woocommerce-multicurrency.php' => array(
				'name'     => 'WooCommerce Multi-Currency',
				'category' => 'multi_currency',
				'impact'   => 'Orders in non-base currency are Unsupported.',
			),
			'woocommerce-product-addons/woocommerce-product-addons.php' => array(
				'name'     => 'Product Add-Ons',
				'category' => 'pricing',
				'impact'   => 'Add-on pricing may not be fully represented in Free preflight.',
			),
			'woocommerce-dynamic-pricing/woocommerce-dynamic-pricing.php' => array(
				'name'     => 'Dynamic Pricing',
				'category' => 'pricing',
				'impact'   => 'Dynamic rules are outside Free selected-coupon preflight fidelity.',
			),
			'yith-woocommerce-dynamic-pricing-and-discounts-premium/init.php' => array(
				'name'     => 'YITH Dynamic Pricing',
				'category' => 'pricing',
				'impact'   => 'Dynamic discounts may produce Unknown or approximated results.',
			),
			'cost-of-goods-for-woocommerce/cost-of-goods-for-woocommerce.php' => array(
				'name'     => 'Cost of Goods for WooCommerce',
				'category' => 'cogs',
				'impact'   => 'Prefer native WooCommerce COGS or MarginBeacon manual cost for Exact confidence.',
			),
		);
	}

	/**
	 * Scan and persist compatibility state.
	 *
	 * @return array
	 */
	public function refresh() {
		if ( ! function_exists( 'is_plugin_active' ) ) {
			require_once ABSPATH . 'wp-admin/includes/plugin.php';
		}

		$detected = array();
		foreach ( self::known_plugins() as $file => $meta ) {
			if ( is_plugin_active( $file ) ) {
				$detected[] = array_merge( array( 'plugin_file' => $file ), $meta );
			}
		}

		$state = array(
			'checked_at_gmt' => gmdate( 'Y-m-d H:i:s' ),
			'detected'       => $detected,
			'limited'        => ! empty( $detected ),
		);
		update_option( Constants::OPTION_COMPATIBILITY, $state, false );
		return $state;
	}

	/**
	 * @return array
	 */
	public function current() {
		$state = get_option( Constants::OPTION_COMPATIBILITY, null );
		if ( ! is_array( $state ) ) {
			return $this->refresh();
		}
		return $state;
	}
}