#include "eetv4soap.h"

#include "eetv4xml.h"

#include <QRegularExpression>

namespace
{
QByteArray withoutXmlDeclaration(const QByteArray &xml)
{
    const int declarationEnd = xml.indexOf("?>");
    return declarationEnd >= 0 ? xml.mid(declarationEnd + 2).trimmed() : xml.trimmed();
}

bool isValidBodyId(const QByteArray &bodyId)
{
    static const QRegularExpression expression(QStringLiteral("^[A-Za-z_][A-Za-z0-9_.-]{0,63}$"));
    return expression.match(QString::fromLatin1(bodyId)).hasMatch();
}
}

QByteArray EetV4Soap::serializeUnsigned(const EetV4SaleRequest &request,
                                         const QByteArray &bodyId,
                                         QString *error)
{
    if (!isValidBodyId(bodyId))
    {
        if (error != nullptr)
        {
            *error = QStringLiteral("SOAP Body ID has an invalid format.");
        }
        return {};
    }

    QString saleError;
    const QByteArray saleXml = EetV4Xml::serializeSale(request, &saleError);
    if (saleXml.isEmpty())
    {
        if (error != nullptr)
        {
            *error = saleError;
        }
        return {};
    }

    QByteArray output;
    output.reserve(saleXml.size() + 512);
    output.append("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
    output.append("<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\""
                 " xmlns:wsse=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd\""
                 " xmlns:wsu=\"http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd\">");
    output.append("<soap:Header/>");
    output.append("<soap:Body wsu:Id=\"");
    output.append(bodyId);
    output.append("\">");
    output.append(withoutXmlDeclaration(saleXml));
    output.append("</soap:Body></soap:Envelope>");

    if (output.size() > MaximumMessageSize)
    {
        if (error != nullptr)
        {
            *error = QStringLiteral("SOAP message exceeds the 12 KiB EET limit.");
        }
        return {};
    }
    return output;
}