<?php
/**
 * Utility helpers.
 *
 * @package Aiadvisors
 */

namespace Aiadvisors;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

class Helpers {

	/**
	 * Check system requirements.
	 *
	 * @return array Array of error messages (empty if all good).
	 */
	public static function check_requirements() {
		$errors = array();

		if ( version_compare( PHP_VERSION, '7.4', '<' ) ) {
			$errors[] = sprintf(
				/* translators: %s: current PHP version. */
				__( 'AI-Advisors requires PHP 7.4 or higher. You are running PHP %s.', 'ai-advisors' ),
				PHP_VERSION
			);
		}

		if ( version_compare( get_bloginfo( 'version' ), '6.0', '<' ) ) {
			$errors[] = sprintf(
				/* translators: %s: current WordPress version. */
				__( 'AI-Advisors requires WordPress 6.0 or higher. You are running WordPress %s.', 'ai-advisors' ),
				get_bloginfo( 'version' )
			);
		}

		if ( ! function_exists( 'curl_init' ) && ! ini_get( 'allow_url_fopen' ) ) {
			$errors[] = __( 'AI-Advisors requires either cURL or allow_url_fopen to send tracking data.', 'ai-advisors' );
		}

		return $errors;
	}

	/**
	 * Format a timestamp as human-readable "time ago" string.
	 */
	public static function time_ago( $timestamp ) {
		if ( ! $timestamp ) {
			return __( 'Never', 'ai-advisors' );
		}

		$diff = time() - $timestamp;

		if ( $diff < 60 ) {
			/* translators: %d: number of seconds. */
			return sprintf( __( '%d seconds ago', 'ai-advisors' ), $diff );
		} elseif ( $diff < 3600 ) {
			/* translators: %d: number of minutes. */
			return sprintf( __( '%d minutes ago', 'ai-advisors' ), round( $diff / 60 ) );
		} elseif ( $diff < 86400 ) {
			/* translators: %d: number of hours. */
			return sprintf( __( '%d hours ago', 'ai-advisors' ), round( $diff / 3600 ) );
		} else {
			/* translators: %d: number of days. */
			return sprintf( __( '%d days ago', 'ai-advisors' ), round( $diff / 86400 ) );
		}
	}

	/**
	 * Get plugin diagnostic info for support.
	 */
	public static function get_plugin_info() {
		return array(
			'plugin_version' => AIADVISORS_VERSION,
			'wp_version'     => get_bloginfo( 'version' ),
			'php_version'    => PHP_VERSION,
			'site_url'       => get_site_url(),
			'sodium'         => function_exists( 'sodium_crypto_secretbox' ) ? 'yes' : 'no',
			'wp_cron'        => ( defined( 'DISABLE_WP_CRON' ) && DISABLE_WP_CRON ) ? 'disabled' : 'enabled',
		);
	}
}