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

$data = readJsonBody();

$hardwareId = trim($data['HardwareId'] ?? '');
if ($hardwareId === '') {
    apiAbort(['OK' => false, 'ERROR' => 'missing_hardware_id', 'MESSAGE' => 'HardwareId is required']);
}

$bizId = (int) ($data['BusinessID'] ?? 0);
if ($bizId <= 0) apiAbort(['OK' => false, 'ERROR' => 'missing_business_id', 'MESSAGE' => 'BusinessID is required']);

$spId = (int) ($data['ServicePointID'] ?? 0);
if ($spId <= 0) apiAbort(['OK' => false, 'ERROR' => 'missing_servicepoint_id', 'MESSAGE' => 'ServicePointID is required']);

$beaconUUID = trim($data['UUID'] ?? '');
if ($beaconUUID === '') apiAbort(['OK' => false, 'ERROR' => 'missing_uuid', 'MESSAGE' => 'UUID is required']);

$major = (int) ($data['Major'] ?? 0);
$minor = (int) ($data['Minor'] ?? 0);

$txPower = isset($data['TxPower']) && is_numeric($data['TxPower']) ? (int) $data['TxPower'] : null;
$advInterval = isset($data['AdvertisingInterval']) && is_numeric($data['AdvertisingInterval']) ? (int) $data['AdvertisingInterval'] : null;
$firmwareVersion = trim($data['FirmwareVersion'] ?? '');

try {
    // Verify business namespace
    $qBiz = queryOne("
        SELECT b.ID, b.BeaconShardID, b.BeaconMajor, bs.UUID AS ShardUUID
        FROM Businesses b LEFT JOIN BeaconShards bs ON b.BeaconShardID = bs.ID
        WHERE b.ID = ? LIMIT 1
    ", [$bizId]);

    if (!$qBiz) apiAbort(['OK' => false, 'ERROR' => 'invalid_business', 'MESSAGE' => 'Business not found']);

    if (strcasecmp($qBiz['ShardUUID'] ?? '', $beaconUUID) !== 0) {
        apiAbort(['OK' => false, 'ERROR' => 'uuid_mismatch', 'MESSAGE' => 'UUID does not match business\'s assigned shard',
            'ExpectedUUID' => $qBiz['ShardUUID'], 'ProvidedUUID' => $beaconUUID]);
    }
    if ((int) $qBiz['BeaconMajor'] !== $major) {
        apiAbort(['OK' => false, 'ERROR' => 'major_mismatch', 'MESSAGE' => 'Major does not match business\'s assigned value',
            'ExpectedMajor' => (int) $qBiz['BeaconMajor'], 'ProvidedMajor' => $major]);
    }

    // Verify service point
    $qSP = queryOne("SELECT ID, BusinessID, BeaconMinor, Name FROM ServicePoints WHERE ID = ? LIMIT 1", [$spId]);
    if (!$qSP) apiAbort(['OK' => false, 'ERROR' => 'invalid_servicepoint', 'MESSAGE' => 'Service point not found']);
    if ((int) $qSP['BusinessID'] !== $bizId) {
        apiAbort(['OK' => false, 'ERROR' => 'servicepoint_business_mismatch', 'MESSAGE' => 'Service point does not belong to this business']);
    }

    if ($qSP['BeaconMinor'] === null) {
        queryTimed("UPDATE ServicePoints SET BeaconMinor = ? WHERE ID = ?", [$minor, $spId]);
    } elseif ((int) $qSP['BeaconMinor'] !== $minor) {
        apiAbort(['OK' => false, 'ERROR' => 'minor_mismatch', 'MESSAGE' => 'Minor does not match service point\'s assigned value',
            'ExpectedMinor' => (int) $qSP['BeaconMinor'], 'ProvidedMinor' => $minor]);
    }

    // Upsert BeaconHardware
    $qExisting = queryOne("SELECT ID, Status FROM BeaconHardware WHERE HardwareId = ? LIMIT 1", [$hardwareId]);

    if ($qExisting) {
        $setClauses = ["BusinessID = ?", "ServicePointID = ?", "ShardUUID = ?", "Major = ?", "Minor = ?", "Status = 'assigned'"];
        $params = [$bizId, $spId, $beaconUUID, $major, $minor];

        if ($txPower !== null) { $setClauses[] = "TxPower = ?"; $params[] = $txPower; }
        if ($advInterval !== null) { $setClauses[] = "AdvertisingInterval = ?"; $params[] = $advInterval; }
        if ($firmwareVersion !== '') { $setClauses[] = "FirmwareVersion = ?"; $params[] = $firmwareVersion; }

        $setClauses[] = "UpdatedAt = NOW()";
        $params[] = $hardwareId;

        queryTimed("UPDATE BeaconHardware SET " . implode(', ', $setClauses) . " WHERE HardwareId = ?", $params);
        $hwId = (int) $qExisting['ID'];
    } else {
        $cols = ['HardwareId', 'BusinessID', 'ServicePointID', 'ShardUUID', 'Major', 'Minor', 'Status'];
        $vals = ['?', '?', '?', '?', '?', '?', "'assigned'"];
        $params = [$hardwareId, $bizId, $spId, $beaconUUID, $major, $minor];

        if ($txPower !== null) { $cols[] = 'TxPower'; $vals[] = '?'; $params[] = $txPower; }
        if ($advInterval !== null) { $cols[] = 'AdvertisingInterval'; $vals[] = '?'; $params[] = $advInterval; }
        if ($firmwareVersion !== '') { $cols[] = 'FirmwareVersion'; $vals[] = '?'; $params[] = $firmwareVersion; }

        queryTimed("INSERT INTO BeaconHardware (" . implode(', ', $cols) . ") VALUES (" . implode(', ', $vals) . ")", $params);
        $hwId = (int) lastInsertId();
    }

    jsonResponse([
        'OK' => true,
        'BeaconHardwareID' => $hwId,
        'HardwareId' => $hardwareId,
        'BusinessID' => $bizId,
        'ServicePointID' => $spId,
        'ServicePointName' => $qSP['Name'],
        'UUID' => $beaconUUID,
        'Major' => $major,
        'Minor' => $minor,
        'Status' => 'assigned',
    ]);

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