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

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

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

    $qSP = queryOne("
        SELECT ID, Name, Code, TypeID, Description
        FROM ServicePoints
        WHERE BusinessID = ? AND BeaconMinor = ? AND IsActive = 1
        LIMIT 1
    ", [(int) $qBiz['BusinessID'], $minor]);

    if (!$qSP) {
        return [
            'Found' => false, 'Error' => 'servicepoint_not_found',
            'BusinessID' => (int) $qBiz['BusinessID'],
            'BusinessName' => $qBiz['BusinessName'],
        ];
    }

    return [
        'Found' => true,
        'ServicePointID' => (int) $qSP['ID'],
        'ServicePointName' => $qSP['Name'],
        'ServicePointCode' => $qSP['Code'] ?? '',
        'ServicePointTypeID' => (int) $qSP['TypeID'],
        'ServicePointDescription' => $qSP['Description'] ?? '',
        'BusinessID' => (int) $qBiz['BusinessID'],
        'BusinessName' => $qBiz['BusinessName'],
    ];
}

try {
    $data = readJsonBody();

    // Batch request
    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;
            $minor = isset($beacon['Minor']) && is_numeric($beacon['Minor']) ? (int) $beacon['Minor'] : -1;

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

            $resolved = resolveSingle($uuid, $major, $minor);
            if ($resolved['Found']) {
                $results[] = [
                    'UUID' => $uuid, 'Major' => $major, 'Minor' => $minor,
                    'ServicePointID' => $resolved['ServicePointID'],
                    'ServicePointName' => $resolved['ServicePointName'],
                    'ServicePointCode' => $resolved['ServicePointCode'],
                    'BusinessID' => $resolved['BusinessID'],
                    'BusinessName' => $resolved['BusinessName'],
                ];
            } else {
                $errResult = ['UUID' => $uuid, 'Major' => $major, 'Minor' => $minor, 'ServicePointID' => null, 'Error' => $resolved['Error']];
                if (isset($resolved['BusinessID'])) {
                    $errResult['BusinessID'] = $resolved['BusinessID'];
                    $errResult['BusinessName'] = $resolved['BusinessName'];
                }
                $results[] = $errResult;
            }
        }
        jsonResponse(['OK' => true, 'COUNT' => count($results), 'Results' => $results]);
    }

    // Single request
    $uuid = trim($data['UUID'] ?? ($_GET['UUID'] ?? ''));
    $major = (int) ($data['Major'] ?? ($_GET['Major'] ?? 0));
    $minor = isset($data['Minor']) ? (int) $data['Minor'] : (isset($_GET['Minor']) ? (int) $_GET['Minor'] : -1);

    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']);
    if ($minor < 0) apiAbort(['OK' => false, 'ERROR' => 'missing_minor', 'MESSAGE' => 'Minor is required']);

    $resolved = resolveSingle($uuid, $major, $minor);

    if (!$resolved['Found']) {
        $err = ['OK' => false, 'ERROR' => $resolved['Error']];
        if (isset($resolved['BusinessID'])) {
            $err['BusinessID'] = $resolved['BusinessID'];
            $err['BusinessName'] = $resolved['BusinessName'];
            $err['MESSAGE'] = 'Service point not found for this business';
        } else {
            $err['MESSAGE'] = 'No business found for this beacon';
        }
        apiAbort($err);
    }

    jsonResponse([
        'OK' => true,
        'ServicePointID' => $resolved['ServicePointID'],
        'ServicePointName' => $resolved['ServicePointName'],
        'ServicePointCode' => $resolved['ServicePointCode'],
        'ServicePointTypeID' => $resolved['ServicePointTypeID'],
        'ServicePointDescription' => $resolved['ServicePointDescription'],
        'BusinessID' => $resolved['BusinessID'],
        'BusinessName' => $resolved['BusinessName'],
    ]);

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