<?php
/**
 * Save User Preferences (AJAX)
 * Kayal Kalmeen Kadai - Fish Stall Management System
 */

define('APP_NAME', 'Kayal Kalmeen Kadai');
require_once __DIR__ . '/config/database.php';
require_once __DIR__ . '/config/settings.php';
require_once __DIR__ . '/includes/functions.php';

startSession();
requireLogin();

header('Content-Type: application/json');

if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $data = json_decode(file_get_contents('php://input'), true);
    
    $primary_color = $data['primary_color'] ?? '#008B8B';
    $secondary_color = $data['secondary_color'] ?? '#20B2AA';
    $font_size = intval($data['font_size'] ?? 16);
    
    // Validate hex color format
    if (!preg_match('/^#[a-fA-F0-9]{6}$/', $primary_color) || 
        !preg_match('/^#[a-fA-F0-9]{6}$/', $secondary_color)) {
        echo json_encode(['success' => false, 'message' => 'Invalid color format']);
        exit();
    }
    
    // Validate font size range
    if ($font_size < 12 || $font_size > 20) {
        echo json_encode(['success' => false, 'message' => 'Font size must be between 12 and 20']);
        exit();
    }
    
    // Save preferences
    saveUserPreferences($_SESSION['user_id'], $primary_color, $secondary_color, $font_size);
    
    echo json_encode(['success' => true, 'message' => 'Preferences saved successfully']);
} else {
    echo json_encode(['success' => false, 'message' => 'Invalid request method']);
}
?>