/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <cppuhelper/implbase.hxx>
#include <cppuhelper/supportsservice.hxx>
#include <com/sun/star/lang/XServiceInfo.hpp>
#include <com/sun/star/lang/XInitialization.hpp>
#include <com/sun/star/rdf/XLiteral.hpp>
#include <com/sun/star/uno/XComponentContext.hpp>

#include <com/sun/star/lang/IllegalArgumentException.hpp>


/// anonymous implementation namespace
namespace {

class CLiteral:
    public ::cppu::WeakImplHelper<
        css::lang::XServiceInfo,
        css::lang::XInitialization,
        css::rdf::XLiteral>
{
public:
    explicit CLiteral();

    // css::lang::XServiceInfo:
    virtual OUString SAL_CALL getImplementationName() override;
    virtual sal_Bool SAL_CALL supportsService(const OUString & ServiceName) override;
    virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;

    // css::lang::XInitialization:
    virtual void SAL_CALL initialize(const css::uno::Sequence< css::uno::Any > & aArguments) override;

    // css::rdf::XNode:
    virtual OUString SAL_CALL getStringValue() override;

    // css::rdf::XLiteral:
    virtual OUString SAL_CALL getValue() override;
    virtual OUString SAL_CALL getLanguage() override;
    virtual css::uno::Reference< css::rdf::XURI > SAL_CALL getDatatype() override;

private:
    CLiteral(CLiteral const&) = delete;
    CLiteral& operator=(CLiteral const&) = delete;

    OUString m_Value;
    OUString m_Language;
    css::uno::Reference< css::rdf::XURI > m_xDatatype;
};

CLiteral::CLiteral()
{}

// com.sun.star.uno.XServiceInfo:
OUString SAL_CALL CLiteral::getImplementationName()
{
    return "CLiteral";
}

sal_Bool SAL_CALL CLiteral::supportsService(OUString const & serviceName)
{
    return cppu::supportsService(this, serviceName);
}

css::uno::Sequence< OUString > SAL_CALL CLiteral::getSupportedServiceNames()
{
    return { "com.sun.star.rdf.Literal" };
}

// css::lang::XInitialization:
void SAL_CALL CLiteral::initialize(const css::uno::Sequence< css::uno::Any > & aArguments)
{
    const sal_Int32 len( aArguments.getLength() );
    if (len < 1 || len > 2) {
            throw css::lang::IllegalArgumentException(
                "CLiteral::initialize: must give 1 or 2 argument(s)", *this, 2);
    }

    OUString arg0;
    if (!(aArguments[0] >>= arg0)) {
        throw css::lang::IllegalArgumentException(
            "CLiteral::initialize: argument must be string", *this, 0);
    }
    //FIXME: what is legal?
    if (!(true)) {
        throw css::lang::IllegalArgumentException(
            "CLiteral::initialize: argument is not valid literal value", *this, 0);
    }
    m_Value = arg0;

    if (len <= 1)
        return;

    OUString arg1;
    css::uno::Reference< css::rdf::XURI > xURI;
    if (aArguments[1] >>= arg1) {
        if (arg1.isEmpty()) {
            throw css::lang::IllegalArgumentException(
                "CLiteral::initialize: argument is not valid language", *this, 1);
        }
        m_Language = arg1;
    } else if (aArguments[1] >>= xURI) {
        if (!xURI.is()) {
            throw css::lang::IllegalArgumentException(
                "CLiteral::initialize: argument is null", *this, 1);
        }
        m_xDatatype = xURI;
    } else {
        throw css::lang::IllegalArgumentException(
            "CLiteral::initialize: argument must be string or URI", *this, 1);
    }
}

// css::rdf::XNode:
OUString SAL_CALL CLiteral::getStringValue()
{
    if (!m_Language.isEmpty()) {
        return m_Value + "@" + m_Language;
    } else if (m_xDatatype.is()) {
        return m_Value + "^^" +  m_xDatatype->getStringValue();
    } else {
        return m_Value;
    }
}

// css::rdf::XLiteral:
OUString SAL_CALL CLiteral::getValue()
{
    return m_Value;
}

OUString SAL_CALL CLiteral::getLanguage()
{
    return m_Language;
}

css::uno::Reference< css::rdf::XURI > SAL_CALL CLiteral::getDatatype()
{
    return m_xDatatype;
}

} // closing anonymous implementation namespace

extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
unoxml_CLiteral_get_implementation(
    css::uno::XComponentContext* , css::uno::Sequence<css::uno::Any> const&)
{
    return cppu::acquire(new CLiteral());
}

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