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

require_once __DIR__ . '/db/config.php';

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

if (empty($query)) {
    echo json_encode([]);
    exit;
}

try {
    $pdo = db();

    // Find all products matching the query
    $stmt = $pdo->prepare(
        'SELECT name, retailer, price FROM products WHERE name LIKE :query ORDER BY name, price'
    );

    $stmt->execute(['query' => '%' . $query . '%']);
    $results = $stmt->fetchAll();

    // Group prices by product name
    $products = [];
    foreach ($results as $row) {
        if (!isset($products[$row['name']])) {
            $products[$row['name']] = [
                'name' => $row['name'],
                'prices' => []
            ];
        }
        $products[$row['name']]['prices'][] = [
            'retailer' => $row['retailer'],
            'price' => $row['price']
        ];
    }

    // Return as a simple array of products
    echo json_encode(array_values($products));

} catch (PDOException $e) {
    http_response_code(500);
    echo json_encode(['error' => 'Database error: ' . $e->getMessage()]);
}