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

    function validateLocation(PDO $pdo, int $company_id, int $warehouse_id, string $zone, string $aisle, string $rack): void {
        $sth = $pdo->prepare(
            "SELECT 1 FROM md_rack
             WHERE company_id = :company_id
               AND warehouse = :warehouse
               AND zone = :zone
               AND aisle = :aisle
               AND rack = :rack
             LIMIT 1"
        );
        $sth->execute([
            ':company_id' => $company_id,
            ':warehouse'  => $warehouse_id,
            ':zone'       => $zone,
            ':aisle'      => $aisle,
            ':rack'       => $rack,
        ]);
        if (!$sth->fetchColumn()) {
            $answer = ['success' => 0, 'message' => 'Location not found.'];
            http_response_code(404);
            exit(json_encode($answer));
        }
    }

    $label_action = $data['label_action'] ?? 'create';
    $barcode      = trim($data['barcode'] ?? '');
    $warehouse_id = (int)($data['warehouse_id'] ?? 0);
    $zone         = trim($data['zone'] ?? '');
    $aisle        = trim($data['aisle'] ?? '');
    $rack         = trim($data['rack'] ?? '');

    if ($label_action === 'list') {
        $sth = $pdo2->prepare(
            "SELECT barcode, warehouse_id, zone, aisle, rack, status, print_count, last_printed_dt
             FROM md_barcode
             WHERE company_id = :company_id
               AND barcode_type = 'loc'"
        );
        $sth->execute([':company_id' => $company_id]);

        $answer['success'] = 1;
        $answer['output']  = $sth->fetchAll(PDO::FETCH_ASSOC);
        exit(json_encode($answer));
    }

    if ($label_action === 'print') {
        if ($barcode === '') {
            $answer['message'] = 'No barcode provided.';
            http_response_code(400);
            exit(json_encode($answer));
        }

        $sth = $pdo2->prepare(
            "UPDATE md_barcode
             SET print_count = print_count + 1,
                 last_printed_dt = NOW()
             WHERE company_id = :company_id
               AND barcode = :barcode
               AND barcode_type = 'loc'
               AND status = 1"
        );
        $sth->execute([':company_id' => $company_id, ':barcode' => $barcode]);

        $answer['success'] = 1;
        exit(json_encode($answer));
    }

    if ($label_action === 'disable') {
        if ($barcode === '') {
            $answer['message'] = 'No barcode provided.';
            http_response_code(400);
            exit(json_encode($answer));
        }

        $sth = $pdo2->prepare(
            "UPDATE md_barcode
             SET status = 0
             WHERE company_id = :company_id
               AND barcode = :barcode
               AND barcode_type = 'loc'
               AND status = 1"
        );
        $sth->execute([':company_id' => $company_id, ':barcode' => $barcode]);

        $answer['success'] = 1;
        exit(json_encode($answer));
    }

    if ($label_action === 'enable') {
        if ($barcode === '') {
            $answer['message'] = 'No barcode provided.';
            http_response_code(400);
            exit(json_encode($answer));
        }

        $sth = $pdo2->prepare(
            "UPDATE md_barcode
             SET status = 1
             WHERE company_id = :company_id
               AND barcode = :barcode
               AND barcode_type = 'loc'
               AND status <> 1"
        );
        $sth->execute([':company_id' => $company_id, ':barcode' => $barcode]);

        $answer['success'] = 1;
        exit(json_encode($answer));
    }

    if ($barcode === '' || !$warehouse_id || $zone === '' || $aisle === '' || $rack === '') {
        $answer['message'] = 'Location barcode data is incomplete.';
        http_response_code(400);
        exit(json_encode($answer));
    }

    validateLocation($pdo2, $company_id, $warehouse_id, $zone, $aisle, $rack);

    $sth = $pdo2->prepare(
        "INSERT INTO md_barcode
            (company_id, barcode_type, barcode, warehouse_id, zone, aisle, rack)
         VALUES
            (:company_id, 'loc', :barcode, :warehouse_id, :zone, :aisle, :rack)
         ON DUPLICATE KEY UPDATE
            barcode_type = VALUES(barcode_type),
            warehouse_id = VALUES(warehouse_id),
            zone = VALUES(zone),
            aisle = VALUES(aisle),
            rack = VALUES(rack),
            status = 1"
    );
    $sth->execute([
        ':company_id'   => $company_id,
        ':barcode'      => $barcode,
        ':warehouse_id' => $warehouse_id,
        ':zone'         => $zone,
        ':aisle'        => $aisle,
        ':rack'         => $rack,
    ]);

    $answer['success'] = 1;
    $answer['output'] = [
        'barcode'      => $barcode,
        'warehouse_id' => $warehouse_id,
        'zone'         => $zone,
        'aisle'        => $aisle,
        'rack'         => $rack,
    ];
    exit(json_encode($answer));
?>