<?php
header('Content-Type: application/json');
require_once __DIR__ . '/../db/config.php';

$q = $_GET['q'] ?? '';

if (strlen($q) < 2) {
    echo json_encode([]);
    exit;
}

try {
    $pdo = db();
    
    // Fetch Loyalty Settings
    $settingsStmt = $pdo->query("SELECT points_for_free_meal FROM loyalty_settings WHERE id = 1");
    $settings = $settingsStmt->fetch(PDO::FETCH_ASSOC);
    $threshold = $settings ? $settings['points_for_free_meal'] : 70;

    $stmt = $pdo->prepare("SELECT id, name, phone, email, points FROM customers WHERE name LIKE ? OR phone LIKE ? LIMIT 10");
    $searchTerm = "%$q%";
    $stmt->execute([$searchTerm, $searchTerm]);
    $customers = $stmt->fetchAll(PDO::FETCH_ASSOC);
    
    foreach ($customers as &$customer) {
        $customer['points'] = intval($customer['points']);
        $customer['eligible_for_free_meal'] = $customer['points'] >= $threshold;
        $customer['points_needed'] = max(0, $threshold - $customer['points']);
        $customer['threshold'] = $threshold;
    }
    
    echo json_encode($customers);
} catch (Exception $e) {
    error_log("Customer Search Error: " . $e->getMessage());
    echo json_encode(['error' => 'Database error']);
}