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#include "qxmlname.h"

#include "qfunctionsignature_p.h"

QT_BEGIN_NAMESPACE

using namespace QPatternist;

FunctionSignature::FunctionSignature(const QXmlName nameP,

                                     const Arity minArgs,

                                     const Arity maxArgs,

                                     const SequenceType::Ptr &returnTypeP,

                                     const Expression::Properties props,

                                     const Expression::ID idP) : CallTargetDescription(nameP)

                                                               , m_minArgs(minArgs)

                                                               , m_maxArgs(maxArgs)

                                                               , m_returnType(returnTypeP)

                                                               , m_arguments()

                                                               , m_props(props)

                                                               , m_id(idP)

{

    Q_ASSERT(minArgs <= maxArgs || maxArgs == FunctionSignature::UnlimitedArity);

    Q_ASSERT(m_maxArgs >= -1);

    Q_ASSERT(returnTypeP);

}

void FunctionSignature::appendArgument(const QXmlName::LocalNameCode nameP,

                                       const SequenceType::Ptr &type)

{

    Q_ASSERT(type);

    m_arguments.append(FunctionArgument::Ptr(new FunctionArgument(QXmlName(StandardNamespaces::empty, nameP), type)));

}

QString FunctionSignature::displayName(const NamePool::Ptr &np) const

{

    QString result;

    result += np->displayName(name());

    result += QLatin1Char('(');

    FunctionArgument::List::const_iterator it(m_arguments.constBegin());

    const FunctionArgument::List::const_iterator end(m_arguments.constEnd());

    if(it != end)

    {

        while(true)

        {

            result += QLatin1Char('$');

            result += np->displayName((*it)->name());

            result += QLatin1String(" as ");

            result += (*it)->type()->displayName(np);

            ++it;

            if(it == end)

                break;

            result += QLatin1String(", ");

        }

    }

    if(m_maxArgs == FunctionSignature::UnlimitedArity)

        result += QLatin1String(", ...");

    result += QLatin1String(") as ");

    result += m_returnType->displayName(np);

    return result;

}

bool FunctionSignature::operator==(const FunctionSignature &other) const

{

    return name() == other.name() &&

           isArityValid(other.maximumArguments()) &&

           isArityValid(other.minimumArguments());

}

void FunctionSignature::setArguments(const FunctionArgument::List &args)

{

    m_arguments = args;

}

FunctionArgument::List FunctionSignature::arguments() const

{

    return m_arguments;

}

bool FunctionSignature::isArityValid(const xsInteger arity) const

{

    return arity >= m_minArgs && arity <= m_maxArgs;

}

FunctionSignature::Arity FunctionSignature::minimumArguments() const

{

    return m_minArgs;

}

FunctionSignature::Arity FunctionSignature::maximumArguments() const

{

    return m_maxArgs;

}

SequenceType::Ptr FunctionSignature::returnType() const

{

    return m_returnType;

}

Expression::Properties FunctionSignature::properties() const

{

    return m_props;

}

Expression::ID FunctionSignature::id() const

{

    return m_id;

}

QT_END_NAMESPACE