/* -*- 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 "sal/config.h"

#include <kapplication.h>

#include "com/sun/star/beans/Optional.hpp"
#include "com/sun/star/beans/PropertyVetoException.hpp"
#include "com/sun/star/beans/UnknownPropertyException.hpp"
#include "com/sun/star/beans/XPropertyChangeListener.hpp"
#include "com/sun/star/beans/XPropertySet.hpp"
#include "com/sun/star/beans/XPropertySetInfo.hpp"
#include "com/sun/star/beans/XVetoableChangeListener.hpp"
#include "com/sun/star/lang/IllegalArgumentException.hpp"
#include "com/sun/star/lang/WrappedTargetException.hpp"
#include "com/sun/star/lang/XMultiComponentFactory.hpp"
#include "com/sun/star/lang/XServiceInfo.hpp"
#include "com/sun/star/uno/Any.hxx"
#include "com/sun/star/uno/Reference.hxx"
#include "com/sun/star/uno/RuntimeException.hpp"
#include "com/sun/star/uno/Sequence.hxx"
#include "com/sun/star/uno/XComponentContext.hpp"
#include "com/sun/star/uno/XCurrentContext.hpp"
#include "cppuhelper/factory.hxx"
#include <cppuhelper/implbase.hxx>
#include "cppuhelper/implementationentry.hxx"
#include "cppuhelper/weak.hxx"
#include "rtl/string.h"
#include "rtl/ustring.h"
#include "rtl/ustring.hxx"
#include "sal/types.h"
#include "uno/current_context.hxx"

#include "kde4access.hxx"

namespace {

OUString SAL_CALL getServiceImplementationName() {
    return OUString(
            "com.sun.star.comp.configuration.backend.KDE4Backend");
}

css::uno::Sequence< OUString > SAL_CALL getServiceSupportedServiceNames() {
    OUString name(
            "com.sun.star.configuration.backend.KDE4Backend");
    return css::uno::Sequence< OUString >(&name, 1);
}

class Service:
    public cppu::WeakImplHelper<
        css::lang::XServiceInfo, css::beans::XPropertySet >
{
public:
    Service();
    Service(const Service&) = delete;
    Service& operator=(const Service&) = delete;

private:
    virtual ~Service() override {}

    virtual OUString SAL_CALL getImplementationName()
        throw (css::uno::RuntimeException, std::exception) override
    { return getServiceImplementationName(); }

    virtual sal_Bool SAL_CALL supportsService(OUString const & ServiceName)
        throw (css::uno::RuntimeException, std::exception) override
    { return ServiceName == getSupportedServiceNames()[0]; }

    virtual css::uno::Sequence< OUString > SAL_CALL
    getSupportedServiceNames() throw (css::uno::RuntimeException, std::exception) override
    { return getServiceSupportedServiceNames(); }

    virtual css::uno::Reference< css::beans::XPropertySetInfo > SAL_CALL
    getPropertySetInfo() throw (css::uno::RuntimeException, std::exception) override
    { return css::uno::Reference< css::beans::XPropertySetInfo >(); }

    virtual void SAL_CALL setPropertyValue(
        OUString const &, css::uno::Any const &)
        throw (
            css::beans::UnknownPropertyException,
            css::beans::PropertyVetoException,
            css::lang::IllegalArgumentException,
            css::lang::WrappedTargetException, css::uno::RuntimeException, std::exception) override;

    virtual css::uno::Any SAL_CALL getPropertyValue(
        OUString const & PropertyName)
        throw (
            css::beans::UnknownPropertyException,
            css::lang::WrappedTargetException, css::uno::RuntimeException, std::exception) override;

    virtual void SAL_CALL addPropertyChangeListener(
        OUString const &,
        css::uno::Reference< css::beans::XPropertyChangeListener > const &)
        throw (
            css::beans::UnknownPropertyException,
            css::lang::WrappedTargetException, css::uno::RuntimeException, std::exception) override
    {}

    virtual void SAL_CALL removePropertyChangeListener(
        OUString const &,
        css::uno::Reference< css::beans::XPropertyChangeListener > const &)
        throw (
            css::beans::UnknownPropertyException,
            css::lang::WrappedTargetException, css::uno::RuntimeException, std::exception) override
    {}

    virtual void SAL_CALL addVetoableChangeListener(
        OUString const &,
        css::uno::Reference< css::beans::XVetoableChangeListener > const &)
        throw (
            css::beans::UnknownPropertyException,
            css::lang::WrappedTargetException, css::uno::RuntimeException, std::exception) override
    {}

    virtual void SAL_CALL removeVetoableChangeListener(
        OUString const &,
        css::uno::Reference< css::beans::XVetoableChangeListener > const &)
        throw (
            css::beans::UnknownPropertyException,
            css::lang::WrappedTargetException, css::uno::RuntimeException, std::exception) override
    {}

    bool enabled_;
};

Service::Service(): enabled_(false) {
    css::uno::Reference< css::uno::XCurrentContext > context(
        css::uno::getCurrentContext());
    if (context.is()) {
        OUString desktop;
        context->getValueByName("system.desktop-environment") >>= desktop;
        enabled_ = desktop == "KDE4" && KApplication::kApplication() != nullptr;
    }
}

void Service::setPropertyValue(OUString const &, css::uno::Any const &)
    throw (
        css::beans::UnknownPropertyException, css::beans::PropertyVetoException,
        css::lang::IllegalArgumentException, css::lang::WrappedTargetException,
        css::uno::RuntimeException, std::exception)
{
    throw css::lang::IllegalArgumentException(
        OUString("setPropertyValue not supported"),
        static_cast< cppu::OWeakObject * >(this), -1);
}

css::uno::Any Service::getPropertyValue(OUString const & PropertyName)
    throw (
        css::beans::UnknownPropertyException, css::lang::WrappedTargetException,
        css::uno::RuntimeException, std::exception)
{
    if (PropertyName == "EnableATToolSupport" || PropertyName == "ExternalMailer" || PropertyName == "SourceViewFontHeight"
     || PropertyName == "SourceViewFontName" || PropertyName == "WorkPathVariable" || PropertyName == "ooInetFTPProxyName"
     || PropertyName == "ooInetFTPProxyPort" || PropertyName == "ooInetHTTPProxyName" || PropertyName == "ooInetHTTPProxyPort"
     || PropertyName == "ooInetHTTPSProxyName" || PropertyName == "ooInetHTTPSProxyPort" || PropertyName == "ooInetNoProxy"
     || PropertyName == "ooInetProxyType" || PropertyName == "TemplatePathVariable" )
    {
        return css::uno::makeAny(
            enabled_
            ? kde4access::getValue(PropertyName)
            : css::beans::Optional< css::uno::Any >());
    } else if (PropertyName == "givenname" || PropertyName == "sn") {
        return css::uno::makeAny(css::beans::Optional< css::uno::Any >());
            //TODO: obtain values from KDE?
    }
    throw css::beans::UnknownPropertyException(
        PropertyName, static_cast< cppu::OWeakObject * >(this));
}

css::uno::Reference< css::uno::XInterface > SAL_CALL createInstance(
    css::uno::Reference< css::uno::XComponentContext > const &)
{
    return static_cast< cppu::OWeakObject * >(new Service);
}

static cppu::ImplementationEntry const services[] = {
    { &createInstance, &getServiceImplementationName,
      &getServiceSupportedServiceNames, &cppu::createSingleComponentFactory, nullptr,
      0 },
    { nullptr, nullptr, nullptr, nullptr, nullptr, 0 }
};

}

extern "C" SAL_DLLPUBLIC_EXPORT void * SAL_CALL kde4be1_component_getFactory(
    char const * pImplName, void * pServiceManager, void * pRegistryKey)
{
    return cppu::component_getFactoryHelper(
        pImplName, pServiceManager, pRegistryKey, services);
}

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