<?php
/**
 * Utility functions for TigerStyle Heat
 */

// Prevent direct access
if (!defined('ABSPATH')) {
    exit;
}

class TigerStyleSEO_Utils {
    
    /**
     * Sanitize textarea field with line breaks preserved
     */
    public static function sanitize_textarea($input) {
        return sanitize_textarea_field($input);
    }
    
    /**
     * Format bytes into human readable format
     */
    public static function format_bytes($bytes, $precision = 2) {
        $units = array('B', 'KB', 'MB', 'GB', 'TB');
        
        for ($i = 0; $bytes > 1024 && $i < count($units) - 1; $i++) {
            $bytes /= 1024;
        }
        
        return round($bytes, $precision) . ' ' . $units[$i];
    }
    
    /**
     * Verify nonce for security
     */
    public static function verify_nonce($nonce_name, $action) {
        return isset($_POST[$nonce_name]) && wp_verify_nonce($_POST[$nonce_name], $action);
    }
    
    /**
     * Check if user can manage options
     */
    public static function current_user_can_manage() {
        return current_user_can('manage_options');
    }
    
    /**
     * Redirect with message
     */
    public static function redirect_with_message($message, $page = 'tigerstyle-heat') {
        wp_redirect(add_query_arg(array(
            'page' => $page,
            'message' => $message
        ), admin_url('admin.php')));
        exit;
    }
    
    /**
     * Get option with prefix
     */
    public static function get_option($option_name, $default = false) {
        return get_option('tigerstyle_' . $option_name, $default);
    }
    
    /**
     * Update option with prefix
     */
    public static function update_option($option_name, $value) {
        return update_option('tigerstyle_' . $option_name, $value);
    }
    
    /**
     * Parse business days from shorthand to Schema.org format
     */
    public static function parse_business_days($days_string) {
        $day_mapping = array(
            'Mo' => 'Monday',
            'Tu' => 'Tuesday', 
            'We' => 'Wednesday',
            'Th' => 'Thursday',
            'Fr' => 'Friday',
            'Sa' => 'Saturday',
            'Su' => 'Sunday'
        );
        
        // Handle ranges like "Mo-Fr"
        if (strpos($days_string, '-') !== false) {
            $parts = explode('-', $days_string);
            if (count($parts) === 2) {
                $start_day = trim($parts[0]);
                $end_day = trim($parts[1]);
                
                $all_days = array_keys($day_mapping);
                $start_index = array_search($start_day, $all_days);
                $end_index = array_search($end_day, $all_days);
                
                if ($start_index !== false && $end_index !== false) {
                    $result = array();
                    for ($i = $start_index; $i <= $end_index; $i++) {
                        $result[] = $day_mapping[$all_days[$i]];
                    }
                    return $result;
                }
            }
        }
        
        // Handle individual days
        $days = array_map('trim', explode(',', $days_string));
        $result = array();
        
        foreach ($days as $day) {
            if (isset($day_mapping[$day])) {
                $result[] = $day_mapping[$day];
            }
        }
        
        return $result;
    }
    
    /**
     * Log debug information
     */
    public static function debug_log($message, $data = null) {
        if (WP_DEBUG_LOG) {
            if ($data !== null) {
                $message .= ' Data: ' . print_r($data, true);
            }
            error_log('[TigerStyle Heat] ' . $message);
        }
    }
}