<?php
/**
 * Centralized Logger for CRM Extensions
 * Централизованная система логирования для всех доработок
 */

if (!class_exists('CRM_Logger')) {
class CRM_Logger {
    const LEVEL_DEBUG = 0;
    const LEVEL_INFO = 1;
    const LEVEL_WARNING = 2;
    const LEVEL_ERROR = 3;
    
    private static $logLevel = self::LEVEL_INFO;
    private static $logFile = null;
    private static $initialized = false;
    
    public static function init() {
        if (self::$initialized) {
            return;
        }
        
        require_once __DIR__ . '/EnvLoader.php';
        EnvLoader::load();
        
        $logLevelStr = EnvLoader::get('LOG_LEVEL', 'INFO');
        self::$logLevel = self::parseLogLevel($logLevelStr);
        
        $logDir = dirname(__DIR__) . '/logs';
        if (!is_dir($logDir)) {
            mkdir($logDir, 0755, true);
        }
        
        self::$logFile = $logDir . '/crm_extensions.log';
        self::$initialized = true;
    }
    
    public static function debug($message, $context = []) {
        self::log(self::LEVEL_DEBUG, $message, $context);
    }
    
    public static function info($message, $context = []) {
        self::log(self::LEVEL_INFO, $message, $context);
    }
    
    public static function warning($message, $context = []) {
        self::log(self::LEVEL_WARNING, $message, $context);
    }
    
    public static function error($message, $context = []) {
        self::log(self::LEVEL_ERROR, $message, $context);
    }
    
    private static function log($level, $message, $context = []) {
        self::init();
        
        if ($level < self::$logLevel) {
            return;
        }
        
        $timestamp = date('Y-m-d H:i:s');
        $levelStr = self::getLevelString($level);
        
        $contextStr = '';
        if (!empty($context)) {
            $contextStr = ' | Context: ' . json_encode($context, JSON_UNESCAPED_UNICODE);
        }
        
        $logLine = "[{$timestamp}] {$levelStr}: {$message}{$contextStr}\n";
        
        // Записываем в файл
        @file_put_contents(self::$logFile, $logLine, FILE_APPEND | LOCK_EX);
        
        // Также в системный лог если это ошибка
        if ($level >= self::LEVEL_ERROR) {
            error_log('[CRM_Extensions] ' . $message);
        }
    }
    
    private static function parseLogLevel($levelStr) {
        switch (strtoupper($levelStr)) {
            case 'DEBUG': return self::LEVEL_DEBUG;
            case 'INFO': return self::LEVEL_INFO;
            case 'WARNING': return self::LEVEL_WARNING;
            case 'ERROR': return self::LEVEL_ERROR;
            default: return self::LEVEL_INFO;
        }
    }
    
    private static function getLevelString($level) {
        switch ($level) {
            case self::LEVEL_DEBUG: return 'DEBUG';
            case self::LEVEL_INFO: return 'INFO';
            case self::LEVEL_WARNING: return 'WARNING';
            case self::LEVEL_ERROR: return 'ERROR';
            default: return 'UNKNOWN';
        }
    }
}
} // Закрываем if (!class_exists('CRM_Logger'))