<?php
require_once __DIR__ . '/../helpers.php';
runAuth();

function resolveSingleBiz(string $uuid, int $major): array {
    $qBiz = queryOne("
        SELECT b.ID, b.Name, b.BrandColor, b.HeaderImageExtension
        FROM Businesses b
        JOIN BeaconShards bs ON b.BeaconShardID = bs.ID
        WHERE bs.UUID = ? AND b.BeaconMajor = ?
        LIMIT 1
    ", [$uuid, $major]);

    if (!$qBiz) {
        return ['Found' => false, 'Error' => 'not_found'];
    }

    $headerImageURL = '';
    if (!empty($qBiz['HeaderImageExtension'])) {
        $headerImageURL = '/uploads/headers/' . $qBiz['ID'] . '.' . $qBiz['HeaderImageExtension'];
    }

    return [
        'Found' => true,
        'BusinessID' => (int) $qBiz['ID'],
        'BusinessName' => $qBiz['Name'],
        'BrandColor' => $qBiz['BrandColor'] ?? '',
        'HeaderImageURL' => $headerImageURL,
    ];
}

try {
    $data = readJsonBody();

    // Batch
    if (isset($data['Beacons']) && is_array($data['Beacons'])) {
        $results = [];
        foreach ($data['Beacons'] as $beacon) {
            $uuid = trim($beacon['UUID'] ?? '');
            $major = isset($beacon['Major']) && is_numeric($beacon['Major']) ? (int) $beacon['Major'] : 0;

            if ($uuid === '' || $major <= 0) {
                $results[] = ['UUID' => $uuid, 'Major' => $major, 'BusinessID' => null, 'Error' => 'invalid_params'];
                continue;
            }

            $resolved = resolveSingleBiz($uuid, $major);
            if ($resolved['Found']) {
                $results[] = [
                    'UUID' => $uuid, 'Major' => $major,
                    'BusinessID' => $resolved['BusinessID'],
                    'BusinessName' => $resolved['BusinessName'],
                    'BrandColor' => $resolved['BrandColor'],
                    'HeaderImageURL' => $resolved['HeaderImageURL'],
                ];
            } else {
                $results[] = ['UUID' => $uuid, 'Major' => $major, 'BusinessID' => null, 'Error' => 'not_found'];
            }
        }
        jsonResponse(['OK' => true, 'COUNT' => count($results), 'Results' => $results]);
    }

    // Single
    $uuid = trim($data['UUID'] ?? ($_GET['UUID'] ?? ''));
    $major = (int) ($data['Major'] ?? ($_GET['Major'] ?? 0));

    if ($uuid === '') apiAbort(['OK' => false, 'ERROR' => 'missing_uuid', 'MESSAGE' => 'UUID is required']);
    if ($major <= 0) apiAbort(['OK' => false, 'ERROR' => 'missing_major', 'MESSAGE' => 'Major is required']);

    $resolved = resolveSingleBiz($uuid, $major);
    if (!$resolved['Found']) {
        apiAbort(['OK' => false, 'ERROR' => 'not_found', 'MESSAGE' => 'No business found for this beacon']);
    }

    jsonResponse([
        'OK' => true,
        'BusinessID' => $resolved['BusinessID'],
        'BusinessName' => $resolved['BusinessName'],
        'BrandColor' => $resolved['BrandColor'],
        'HeaderImageURL' => $resolved['HeaderImageURL'],
    ]);

} catch (Exception $e) {
    jsonResponse(['OK' => false, 'ERROR' => 'server_error', 'MESSAGE' => $e->getMessage()]);
}