<?php
/**
 * Runtime dependency checks.
 *
 * @package Kayvandra\MarginBeacon
 */

declare(strict_types=1);

namespace Kayvandra\MarginBeacon\Infrastructure\Woo;

/**
 * Validates PHP, WordPress, and WooCommerce requirements.
 */
final class DependencyChecker {

	/**
	 * Failure messages.
	 *
	 * @var string[]
	 */
	private $failures = array();

	/**
	 * Whether all requirements are met.
	 *
	 * @return bool
	 */
	public function meets_requirements() {
		$this->failures = array();

		if ( version_compare( PHP_VERSION, AKSMB_MIN_PHP, '<' ) ) {
			$this->failures[] = sprintf(
				/* translators: 1: required PHP, 2: current PHP */
				__( 'MarginBeacon requires PHP %1$s or higher. You are running %2$s.', 'marginbeacon' ),
				AKSMB_MIN_PHP,
				PHP_VERSION
			);
		}

		global $wp_version;
		if ( isset( $wp_version ) && version_compare( $wp_version, AKSMB_MIN_WP, '<' ) ) {
			$this->failures[] = sprintf(
				/* translators: 1: required WP, 2: current WP */
				__( 'MarginBeacon requires WordPress %1$s or higher. You are running %2$s.', 'marginbeacon' ),
				AKSMB_MIN_WP,
				$wp_version
			);
		}

		if ( ! $this->is_woocommerce_active() ) {
			$this->failures[] = __( 'MarginBeacon requires WooCommerce to be installed and active.', 'marginbeacon' );
		} elseif ( defined( 'WC_VERSION' ) && version_compare( WC_VERSION, AKSMB_MIN_WC, '<' ) ) {
			$this->failures[] = sprintf(
				/* translators: 1: required WC, 2: current WC */
				__( 'MarginBeacon requires WooCommerce %1$s or higher. You are running %2$s.', 'marginbeacon' ),
				AKSMB_MIN_WC,
				WC_VERSION
			);
		}

		if ( ! extension_loaded( 'bcmath' ) ) {
			$this->failures[] = __( 'MarginBeacon requires the PHP BCMath extension for exact money calculations.', 'marginbeacon' );
		}

		return empty( $this->failures );
	}

	/**
	 * @return string[]
	 */
	public function failures() {
		return $this->failures;
	}

	/**
	 * @return bool
	 */
	private function is_woocommerce_active() {
		if ( class_exists( 'WooCommerce' ) ) {
			return true;
		}
		if ( ! function_exists( 'is_plugin_active' ) ) {
			require_once ABSPATH . 'wp-admin/includes/plugin.php';
		}
		return function_exists( 'is_plugin_active' ) && is_plugin_active( 'woocommerce/woocommerce.php' );
	}
}