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#include <QUrl>

#include "qcommonsequencetypes_p.h"

#include "qnodebuilder_p.h"

#include "qqnamevalue_p.h"

#include "qattributeconstructor_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

AttributeConstructor::AttributeConstructor(const Expression::Ptr &op1,

                                           const Expression::Ptr &op2) : PairContainer(op1, op2)

{

}

QString AttributeConstructor::processValue(const QXmlName name,

                                           const Item &value)

{

    if(!value)

        return QString();

    else if(name == QXmlName(StandardNamespaces::xml, StandardLocalNames::id))

        return value.stringValue().simplified();

    else

        return value.stringValue();

}

Item AttributeConstructor::evaluateSingleton(const DynamicContext::Ptr &context) const

{

    const Item nameItem(m_operand1->evaluateSingleton(context));

    const Item content(m_operand2->evaluateSingleton(context));

    const QXmlName name(nameItem.as<QNameValue>()->qName());

    const QString value(processValue(name, content));

    const NodeBuilder::Ptr nodeBuilder(context->nodeBuilder(QUrl()));

    nodeBuilder->attribute(name, QStringRef(&value));

    const QAbstractXmlNodeModel::Ptr nm(nodeBuilder->builtDocument());

    context->addNodeModel(nm);

    return nm->root(QXmlNodeModelIndex());

}

void AttributeConstructor::evaluateToSequenceReceiver(const DynamicContext::Ptr &context) const

{

    QAbstractXmlReceiver *const receiver = context->outputReceiver();

    const Item nameItem(m_operand1->evaluateSingleton(context));

    const Item content(m_operand2->evaluateSingleton(context));

    const QXmlName name(nameItem.as<QNameValue>()->qName());

    const QString value(processValue(name, content));

    receiver->attribute(name, QStringRef(&value));

}

SequenceType::Ptr AttributeConstructor::staticType() const

{

    return CommonSequenceTypes::ExactlyOneAttribute;

}

SequenceType::List AttributeConstructor::expectedOperandTypes() const

{

    SequenceType::List result;

    result.append(CommonSequenceTypes::ExactlyOneQName);

    result.append(CommonSequenceTypes::ZeroOrMoreItems);

    return result;

}

Expression::Properties AttributeConstructor::properties() const

{

    return DisableElimination | IsNodeConstructor;

}

ExpressionVisitorResult::Ptr

AttributeConstructor::accept(const ExpressionVisitor::Ptr &visitor) const

{

    return visitor->visit(this);

}

Expression::ID AttributeConstructor::id() const

{

    return IDAttributeConstructor;

}

QT_END_NAMESPACE