<?php
/**
 * IGNY8 File Logger
 * 
 * Provides file-based logging for all publish/sync workflows
 * 
 * @package IGNY8_Bridge
 */

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

class Igny8_Logger {
    
    /**
     * Log directory path
     */
    private static $log_dir = null;
    
    /**
     * Initialize logger
     */
    public static function init() {
        // Set log directory to plugin root/logs/publish-sync-logs
        self::$log_dir = dirname(dirname(__FILE__)) . '/logs/publish-sync-logs';
        
        // Create directory if it doesn't exist
        if (!file_exists(self::$log_dir)) {
            wp_mkdir_p(self::$log_dir);
        }
        
        // Ensure directory is writable
        if (!is_writable(self::$log_dir)) {
            @chmod(self::$log_dir, 0755);
        }
    }
    
    /**
     * Write log message to file
     * 
     * @param string $message Log message
     * @param string $level Log level (INFO, WARNING, ERROR)
     * @param string $log_file Log file name (without .log extension)
     */
    public static function log($message, $level = 'INFO', $log_file = 'publish-sync') {
        if (self::$log_dir === null) {
            self::init();
        }
        
        $timestamp = current_time('Y-m-d H:i:s');
        $formatted_message = "[{$timestamp}] [{$level}] {$message}\n";
        
        $file_path = self::$log_dir . '/' . $log_file . '.log';
        
        // Append to log file
        error_log($formatted_message, 3, $file_path);
        
        // Also log to WordPress debug.log if WP_DEBUG is enabled
        if (defined('WP_DEBUG') && WP_DEBUG) {
            error_log("[IGNY8] [{$level}] {$message}");
        }
    }
    
    /**
     * Log info message
     */
    public static function info($message, $log_file = 'publish-sync') {
        self::log($message, 'INFO', $log_file);
    }
    
    /**
     * Log warning message
     */
    public static function warning($message, $log_file = 'publish-sync') {
        self::log($message, 'WARNING', $log_file);
    }
    
    /**
     * Log error message
     */
    public static function error($message, $log_file = 'publish-sync') {
        self::log($message, 'ERROR', $log_file);
    }
    
    /**
     * Log API request
     */
    public static function api_request($method, $endpoint, $data = null) {
        $message = "API REQUEST: {$method} {$endpoint}";
        if ($data) {
            $message .= "\n   Data: " . json_encode($data, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
        }
        self::log($message, 'INFO', 'wordpress-api');
    }
    
    /**
     * Log API response
     */
    public static function api_response($status_code, $body) {
        $message = "API RESPONSE: HTTP {$status_code}";
        if ($body) {
            $body_str = is_string($body) ? $body : json_encode($body, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
            $message .= "\n   Body: " . substr($body_str, 0, 500);
        }
        self::log($message, 'INFO', 'wordpress-api');
    }
    
    /**
     * Log API error
     */
    public static function api_error($error_message) {
        self::log("API ERROR: {$error_message}", 'ERROR', 'wordpress-api');
    }
    
    /**
     * Log webhook event
     */
    public static function webhook($event_type, $data) {
        $message = "WEBHOOK EVENT: {$event_type}";
        if ($data) {
            $message .= "\n   Data: " . json_encode($data, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
        }
        self::log($message, 'INFO', 'webhooks');
    }
    
    /**
     * Log workflow separator
     */
    public static function separator($title = '') {
        $line = str_repeat('=', 80);
        self::log($line);
        if ($title) {
            self::log($title);
            self::log($line);
        }
    }
    
    /**
     * Get log file contents
     * 
     * @param string $log_file Log file name
     * @param int $lines Number of lines to read (default 100, 0 for all)
     * @return string Log contents
     */
    public static function get_log_contents($log_file = 'publish-sync', $lines = 100) {
        if (self::$log_dir === null) {
            self::init();
        }
        
        $file_path = self::$log_dir . '/' . $log_file . '.log';
        
        if (!file_exists($file_path)) {
            return '';
        }
        
        if ($lines === 0) {
            return file_get_contents($file_path);
        }
        
        // Read last N lines efficiently
        $file = new SplFileObject($file_path, 'r');
        $file->seek(PHP_INT_MAX);
        $total_lines = $file->key() + 1;
        
        $start_line = max(0, $total_lines - $lines);
        $file->seek($start_line);
        
        $content = '';
        while (!$file->eof()) {
            $content .= $file->fgets();
        }
        
        return $content;
    }
    
    /**
     * Clear log file
     */
    public static function clear_log($log_file = 'publish-sync') {
        if (self::$log_dir === null) {
            self::init();
        }
        
        $file_path = self::$log_dir . '/' . $log_file . '.log';
        
        if (file_exists($file_path)) {
            @unlink($file_path);
        }
    }
    
    /**
     * Get all log files
     */
    public static function get_log_files() {
        if (self::$log_dir === null) {
            self::init();
        }
        
        if (!is_dir(self::$log_dir)) {
            return array();
        }
        
        $files = glob(self::$log_dir . '/*.log');
        $log_files = array();
        
        foreach ($files as $file) {
            $log_files[] = array(
                'name' => basename($file, '.log'),
                'path' => $file,
                'size' => filesize($file),
                'modified' => filemtime($file),
            );
        }
        
        return $log_files;
    }
}

// Initialize logger
Igny8_Logger::init();