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#include "precompiled_shell.hxx"
#include "sal/config.h"

#include "boost/noncopyable.hpp"
#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/lang/WrappedTargetException.hpp"
#include "com/sun/star/uno/Any.hxx"
#include "com/sun/star/uno/Exception.hpp"
#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/implbase2.hxx"
#include "cppuhelper/implementationentry.hxx"
#include "cppuhelper/weak.hxx"
#include "osl/diagnose.h"
#include "rtl/string.h"
#include "rtl/textenc.h"
#include "rtl/ustring.h"
#include "rtl/ustring.hxx"
#include "sal/types.h"
#include "uno/current_context.hxx"
#include "uno/lbnames.h"

namespace {

namespace css = com::sun::star;

rtl::OUString SAL_CALL getDefaultImplementationName() {
    return rtl::OUString(
        RTL_CONSTASCII_USTRINGPARAM(
            "com.sun.star.comp.configuration.backend.DesktopBackend"));
}

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

class Default:
    public cppu::WeakImplHelper2<
        css::lang::XServiceInfo, css::beans::XPropertySet >,
    private boost::noncopyable
{
public:
    Default() {}

private:
    virtual ~Default() {}

    virtual rtl::OUString SAL_CALL getImplementationName()
        throw (css::uno::RuntimeException)
    { return getDefaultImplementationName(); }

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

    virtual css::uno::Sequence< rtl::OUString > SAL_CALL
    getSupportedServiceNames() throw (css::uno::RuntimeException)
    { return getDefaultSupportedServiceNames(); }

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

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

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

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

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

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

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

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

css::uno::Any Default::getPropertyValue(rtl::OUString const & PropertyName)
    throw (
        css::beans::UnknownPropertyException, css::lang::WrappedTargetException,
        css::uno::RuntimeException)
{
    if (PropertyName.equalsAsciiL(
            RTL_CONSTASCII_STRINGPARAM("EnableATToolSupport")) ||
        PropertyName.equalsAsciiL(
            RTL_CONSTASCII_STRINGPARAM("ExternalMailer")) ||
        PropertyName.equalsAsciiL(
            RTL_CONSTASCII_STRINGPARAM("SourceViewFontHeight")) ||
        PropertyName.equalsAsciiL(
            RTL_CONSTASCII_STRINGPARAM("SourceViewFontName")) ||
        PropertyName.equalsAsciiL(
            RTL_CONSTASCII_STRINGPARAM("WorkPathVariable")) ||
        PropertyName.equalsAsciiL(
            RTL_CONSTASCII_STRINGPARAM("ooInetFTPProxyName")) ||
        PropertyName.equalsAsciiL(
            RTL_CONSTASCII_STRINGPARAM("ooInetFTPProxyPort")) ||
        PropertyName.equalsAsciiL(
            RTL_CONSTASCII_STRINGPARAM("ooInetHTTPProxyName")) ||
        PropertyName.equalsAsciiL(
            RTL_CONSTASCII_STRINGPARAM("ooInetHTTPProxyPort")) ||
        PropertyName.equalsAsciiL(
            RTL_CONSTASCII_STRINGPARAM("ooInetHTTPSProxyName")) ||
        PropertyName.equalsAsciiL(
            RTL_CONSTASCII_STRINGPARAM("ooInetHTTPSProxyPort")) ||
        PropertyName.equalsAsciiL(
            RTL_CONSTASCII_STRINGPARAM("ooInetNoProxy")) ||
        PropertyName.equalsAsciiL(
            RTL_CONSTASCII_STRINGPARAM("ooInetProxyType")))
    {
        return css::uno::makeAny(css::beans::Optional< css::uno::Any >());
    }
    throw css::beans::UnknownPropertyException(
        PropertyName, static_cast< cppu::OWeakObject * >(this));
}

css::uno::Reference< css::uno::XInterface > createBackend(
    css::uno::Reference< css::uno::XComponentContext > const & context,
    rtl::OUString const & name)
{
    try {
        return css::uno::Reference< css::lang::XMultiComponentFactory >(
            context->getServiceManager(), css::uno::UNO_SET_THROW)->
            createInstanceWithContext(name, context);
    } catch (css::uno::RuntimeException &) {
        // Assuming these exceptions are real errors:
        throw;
    } catch (css::uno::Exception & e) {
        // Assuming these exceptions indicate that the service is not installed:
        OSL_TRACE(
            "createInstance(%s) failed with %s",
            rtl::OUStringToOString(name, RTL_TEXTENCODING_UTF8).getStr(),
            rtl::OUStringToOString(e.Message, RTL_TEXTENCODING_UTF8).getStr());
        return css::uno::Reference< css::uno::XInterface >();
    }
}

css::uno::Reference< css::uno::XInterface > SAL_CALL createInstance(
    css::uno::Reference< css::uno::XComponentContext > const & context)
{
    rtl::OUString desktop;
    css::uno::Reference< css::uno::XCurrentContext > current(
        css::uno::getCurrentContext());
    if (current.is()) {
        current->getValueByName(
            rtl::OUString(
                RTL_CONSTASCII_USTRINGPARAM("system.desktop-environment"))) >>=
            desktop;
    }
    // Fall back to the default if the specific backend is not available:
    css::uno::Reference< css::uno::XInterface > backend;
    if (desktop.equalsAsciiL(RTL_CONSTASCII_STRINGPARAM("GNOME"))) {
        backend = createBackend(
            context,
            rtl::OUString(
                RTL_CONSTASCII_USTRINGPARAM(
                    "com.sun.star.configuration.backend.GconfBackend")));
    } else if (desktop.equalsAsciiL(RTL_CONSTASCII_STRINGPARAM("KDE"))) {
        backend = createBackend(
            context,
            rtl::OUString(
                RTL_CONSTASCII_USTRINGPARAM(
                    "com.sun.star.configuration.backend.KDEBackend")));
    } else if (desktop.equalsAsciiL(RTL_CONSTASCII_STRINGPARAM("KDE4"))) {
        backend = createBackend(
            context,
            rtl::OUString(
                RTL_CONSTASCII_USTRINGPARAM(
                    "com.sun.star.configuration.backend.KDE4Backend")));
    }
    return backend.is()
        ? backend : static_cast< cppu::OWeakObject * >(new Default);
}

static cppu::ImplementationEntry const services[] = {
    { &createInstance, &getDefaultImplementationName,
      &getDefaultSupportedServiceNames, &cppu::createSingleComponentFactory, 0,
      0 },
    { 0, 0, 0, 0, 0, 0 }
};

}

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

extern "C" SAL_DLLPUBLIC_EXPORT void SAL_CALL
component_getImplementationEnvironment(
    char const ** ppEnvTypeName, uno_Environment **)
{
    *ppEnvTypeName = CPPU_CURRENT_LANGUAGE_BINDING_NAME;
}
