<?php

defined( 'ABSPATH' ) || exit;

if ( class_exists( 'AIEO_Runtime_Presence' ) ) {
	return;
}

class AIEO_Runtime_Presence {

	
	const BASENAME = 'ai-eshop-optimizer-runtime/ai-eshop-optimizer-runtime.php';

	
	const TRANSIENT = 'aieo_runtime_header';

	
	public static function active() {
		return defined( 'AIEO_RUNTIME_VERSION' );
	}

	
	public static function activated() {
		static $cached = null;
		if ( null !== $cached ) {
			return $cached;
		}
		
		if ( defined( 'AIEO_RUNTIME_DIR' ) || defined( 'AIEO_RUNTIME_VERSION' ) ) {
			$cached = true;
			return $cached;
		}
		if ( ! function_exists( 'get_option' ) ) {
			return false; 
		}
		$cached = (bool) preg_grep( '#^ai-eshop-optimizer-runtime/#', (array) get_option( 'active_plugins', array() ) );
		return $cached;
	}

	
	public static function installed() {
		return file_exists( self::main_file() );
	}

	
	public static function main_file() {
		if ( defined( 'AIEO_RUNTIME_FILE' ) ) {
			return (string) AIEO_RUNTIME_FILE;
		}
		return WP_PLUGIN_DIR . '/' . self::BASENAME;
	}

	
	public static function version() {
		$core = self::core_version();
		$hit  = get_transient( self::TRANSIENT );
		if ( is_array( $hit ) && isset( $hit['core'], $hit['version'] ) && $hit['core'] === $core ) {
			return (string) $hit['version'];
		}

		$version = '';
		$file    = self::main_file();
		if ( file_exists( $file ) && function_exists( 'get_file_data' ) ) {
			$hdr     = get_file_data( $file, array( 'Version' => 'Version' ) );
			$version = isset( $hdr['Version'] ) ? trim( (string) $hdr['Version'] ) : '';
		}

		set_transient( self::TRANSIENT, array( 'core' => $core, 'version' => $version ), HOUR_IN_SECONDS );
		return $version;
	}

	
	public static function core_version() {
		return defined( 'AIEO_VERSION' ) ? (string) AIEO_VERSION : '';
	}

	
	public static function mismatched() {
		$core = self::core_version();
		$rt   = self::version();
		if ( '' === $core || '' === $rt || '0' === $core || '0' === $rt ) {
			return false;
		}
		return 0 !== version_compare( $core, $rt );
	}

	
	public static function state() {
		if ( ! self::installed() ) {
			return 'absent';
		}
		if ( ! self::active() ) {
			return 'inactive';
		}
		return self::mismatched() ? 'mismatch' : 'active';
	}

	
	public static function report() {
		return array(
			'state'           => self::state(),
			'runtime_active'  => self::active(),
			'runtime_present' => self::installed(),
			'runtime_version' => self::version(),
			'core_version'    => self::core_version(),
			'mismatched'      => self::mismatched(),
		);
	}

	
	public static function status_text() {
		switch ( self::state() ) {
			case 'absent':
				return __( 'Not installed — your pages load the slower path.', 'ai-eshop-optimizer' );

			case 'inactive':
				return __( 'Downloaded but not activated — activate it on the Plugins screen and your storefront takes the fast path.', 'ai-eshop-optimizer' );

			case 'mismatch':
				return sprintf(
					
					__( 'Version mismatch: the runtime is %1$s and Rooster One is %2$s. Update them together — a mismatched pair is the one combination that can take a shop down.', 'ai-eshop-optimizer' ),
					self::version(),
					self::core_version()
				);

			default:
				
				
				
				return __( 'Installed and serving your site.', 'ai-eshop-optimizer' );
		}
	}

	
	public static function flush() {
		delete_transient( self::TRANSIENT );
	}
}

add_action( 'activated_plugin', array( 'AIEO_Runtime_Presence', 'flush' ) );
add_action( 'deactivated_plugin', array( 'AIEO_Runtime_Presence', 'flush' ) );