<?php
    session_start();
    require '../../../assets/utils/db_auth.php';
    require '../../../assets/utils/classes/WarehouseManager.php';

    $type    = $data['type'] ?? '';
    $whMgmt  = new WarehouseManager($pdo2, $company_id);

    // Resolve warehouse, zone and aisle
    $warehouse = (int)($data['warehouse'] ?? 0);
    $zone      = $data['zone']  ?? '';
    $aisle     = $data['aisle'] ?? '';
    if (isset($data['warehouse_from']) && $type === 'from') { $warehouse = (int)$data['warehouse_from']; $zone = $data['zone_from'] ?? $zone; $aisle = $data['aisle_from'] ?? $aisle; }
    if (isset($data['warehouse_to'])   && $type === 'to')   { $warehouse = (int)$data['warehouse_to'];   $zone = $data['zone_to']   ?? $zone; $aisle = $data['aisle_to']   ?? $aisle; }

    if ($type === 'to') {
        $output = $whMgmt->getRacksIn($warehouse, $zone, $aisle);

    } elseif ($type === 'from') {
        $output = $whMgmt->getRacksOut(
            $warehouse,
            $zone,
            $aisle,
            $data['product_sku']   ?? '',
            $data['lot_number']    ?? null,
            $data['serial_number'] ?? null
        );

    } else {
        $sth = $pdo2->prepare(
            "SELECT DISTINCT rack FROM md_rack
             WHERE company_id = :company_id AND warehouse = :warehouse AND zone = :zone AND aisle = :aisle
             ORDER BY CAST(rack AS UNSIGNED), rack"
        );
        $sth->execute([':company_id' => $company_id, ':warehouse' => $warehouse, ':zone' => $zone, ':aisle' => $aisle]);
        $output = array_column($sth->fetchAll(PDO::FETCH_ASSOC), 'rack');
    }

    // Edit mode
    if (!empty($data['id'])) {
        $sth = $pdo2->prepare(
            "SELECT DISTINCT rack FROM md_rack
             WHERE company_id = :company_id AND warehouse = :warehouse AND zone = :zone AND aisle = :aisle
             ORDER BY CAST(rack AS UNSIGNED), rack"
        );
        $sth->execute([':company_id' => $company_id, ':warehouse' => $warehouse, ':zone' => $zone, ':aisle' => $aisle]);
        $output = array_column($sth->fetchAll(PDO::FETCH_ASSOC), 'rack');
    }

    $answer['output']  = $output;
    $answer['success'] = 1;
    exit(json_encode($answer));
?>