/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the Collabora Office 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 <cassert>

#include <com/sun/star/beans/NamedValue.hpp>
#include <com/sun/star/container/NoSuchElementException.hpp>
#include <com/sun/star/container/XHierarchicalNameAccess.hpp>
#include <com/sun/star/container/XNamed.hpp>
#include <com/sun/star/lang/XMultiServiceFactory.hpp>
#include <com/sun/star/lang/XServiceInfo.hpp>
#include <com/sun/star/lang/WrappedTargetRuntimeException.hpp>
#include <com/sun/star/registry/InvalidRegistryException.hpp>
#include <com/sun/star/registry/InvalidValueException.hpp>
#include <com/sun/star/registry/RegistryKeyType.hpp>
#include <com/sun/star/registry/RegistryValueType.hpp>
#include <com/sun/star/registry/XRegistryKey.hpp>
#include <com/sun/star/registry/XSimpleRegistry.hpp>
#include <cpo/uno/Any.hxx>
#include <com/sun/star/uno/DeploymentException.hpp>
#include <com/sun/star/uno/Exception.hpp>
#include <com/sun/star/uno/Reference.hxx>
#include <com/sun/star/uno/RuntimeException.hpp>
#include <cpo/uno/Sequence.hxx>
#include <cpo/uno/Type.hxx>
#include <cpo/uno/TypeClass.hpp>
#include <com/sun/star/uno/XComponentContext.hpp>
#include <com/sun/star/uno/XInterface.hpp>
#include <com/sun/star/util/XFlushable.hpp>
#include <cppu/unotype.hxx>
#include <cppuhelper/exc_hlp.hxx>
#include <cppuhelper/implbase.hxx>
#include <cppuhelper/supportsservice.hxx>
#include <cppuhelper/weak.hxx>
#include <mutex>
#include <rtl/ustring.hxx>
#include <utility>
#include <sal/types.h>

namespace configmgr::configuration_registry {

namespace {

class Service:
    public cppu::WeakImplHelper<
        css::lang::XServiceInfo, css::registry::XSimpleRegistry,
        css::util::XFlushable >
{
public:
    explicit Service(css::uno::Reference< css::uno::XComponentContext > const & context);

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

    virtual ~Service() override {}

    virtual OUString getImplementationName() override
    { return u"com.sun.star.comp.configuration.ConfigurationRegistry"_ustr; }

    virtual bool supportsService(OUString const & ServiceName) override
    { return cppu::supportsService(this, ServiceName); }

    virtual cpo::uno::Sequence< OUString >
    getSupportedServiceNames() override
    { return { u"com.sun.star.configuration.ConfigurationRegistry"_ustr }; }

    virtual OUString getURL() override;

    virtual void open(
        OUString const & rURL, bool bReadOnly, bool) override;

    virtual bool isValid() override;

    virtual void close() override;

    virtual void destroy() override;

    virtual css::uno::Reference< css::registry::XRegistryKey >
    getRootKey() override;

    virtual bool isReadOnly() override;

    virtual void mergeKey(OUString const &, OUString const &) override;

    virtual void flush() override;

    virtual void addFlushListener(
        css::uno::Reference< css::util::XFlushListener > const &) override;

    virtual void removeFlushListener(
        css::uno::Reference< css::util::XFlushListener > const &) override;

    void checkValid();

    void checkValid_RuntimeException();

    void doClose();

    css::uno::Reference< css::lang::XMultiServiceFactory > provider_;
    std::mutex mutex_;
    css::uno::Reference< css::uno::XInterface > access_;
    OUString url_;
    bool readOnly_;

    friend class RegistryKey;
};

class RegistryKey:
    public cppu::WeakImplHelper< css::registry::XRegistryKey >
{
public:
    RegistryKey(Service & service, cpo::uno::Any value):
        service_(service), value_(std::move(value)) {}

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

    virtual ~RegistryKey() override {}

    virtual OUString getKeyName() override;

    virtual bool isReadOnly() override;

    virtual bool isValid() override;

    virtual css::registry::RegistryKeyType getKeyType(
        OUString const &) override;

    virtual css::registry::RegistryValueType getValueType() override;

    virtual sal_Int32 getLongValue() override;

    virtual void setLongValue(sal_Int32) override;

    virtual cpo::uno::Sequence< sal_Int32 > getLongListValue() override;

    virtual void setLongListValue(
        cpo::uno::Sequence< sal_Int32 > const &) override;

    virtual OUString getAsciiValue() override;

    virtual void setAsciiValue(OUString const &) override;

    virtual cpo::uno::Sequence< OUString > getAsciiListValue() override;

    virtual void setAsciiListValue(
        cpo::uno::Sequence< OUString > const &) override;

    virtual OUString getStringValue() override;

    virtual void setStringValue(OUString const &) override;

    virtual cpo::uno::Sequence< OUString > getStringListValue() override;

    virtual void setStringListValue(
        cpo::uno::Sequence< OUString > const &) override;

    virtual cpo::uno::Sequence< sal_Int8 > getBinaryValue() override;

    virtual void setBinaryValue(cpo::uno::Sequence< sal_Int8 > const &) override;

    virtual css::uno::Reference< css::registry::XRegistryKey > openKey(
        OUString const & aKeyName) override;

    virtual css::uno::Reference< css::registry::XRegistryKey >
    createKey(OUString const &) override;

    virtual void closeKey() override;

    virtual void deleteKey(OUString const &) override;

    virtual
    cpo::uno::Sequence< css::uno::Reference< css::registry::XRegistryKey > >
    openKeys() override;

    virtual cpo::uno::Sequence< OUString > getKeyNames() override;

    virtual bool createLink(
        OUString const &, OUString const &) override;

    virtual void deleteLink(OUString const &) override;

    virtual OUString getLinkTarget(OUString const &) override;

    virtual OUString getResolvedName(
        OUString const & aKeyName) override;

    Service & service_;
    cpo::uno::Any value_;
};

Service::Service(
    css::uno::Reference< css::uno::XComponentContext > const & context)
    : readOnly_(false)
{
    assert(context.is());
    try {
        provider_.set(
            context->getServiceManager()->createInstanceWithContext(
                u"com.sun.star.configuration.DefaultProvider"_ustr, context),
            css::uno::UNO_QUERY_THROW);
    } catch (css::uno::RuntimeException &) {
        throw;
    } catch (css::uno::Exception & e) {
        throw css::uno::DeploymentException(
            ("component context fails to supply service"
             " com.sun.star.configuration.DefaultProvider of type"
             " com.sun.star.lang.XMultiServiceFactory: " + e.Message),
            context);
    }
}

OUString Service::getURL() {
    std::unique_lock g(mutex_);
    checkValid_RuntimeException();
    return url_;
}

void Service::open(OUString const & rURL, bool bReadOnly, bool)
{
    //TODO: bCreate
    std::unique_lock g(mutex_);
    if (access_.is()) {
        doClose();
    }
    cpo::uno::Sequence< cpo::uno::Any > args{ cpo::uno::Any(
        css::beans::NamedValue(u"nodepath"_ustr, cpo::uno::Any(rURL))) };
    try {
        access_ = provider_->createInstanceWithArguments(
            (bReadOnly
             ? u"com.sun.star.configuration.ConfigurationAccess"_ustr
             : u"com.sun.star.configuration.ConfigurationUpdateAccess"_ustr),
            args);
    } catch (css::uno::RuntimeException &) {
        throw;
    } catch (css::uno::Exception & e) {
        cpo::uno::Any anyEx = cppu::getCaughtException();
        throw css::lang::WrappedTargetRuntimeException(
            "com.sun.star.configuration.ConfigurationRegistry: open failed: " +
            e.Message,
            getXWeak(), anyEx );
    }
    url_ = rURL;
    readOnly_ = bReadOnly;
}

bool Service::isValid() {
    std::unique_lock g(mutex_);
    return access_.is();
}

void Service::close()
{
    std::unique_lock g(mutex_);
    checkValid();
    doClose();
}

void Service::destroy()
{
    throw css::uno::RuntimeException(
        u"com.sun.star.configuration.ConfigurationRegistry: not implemented"_ustr,
        getXWeak());
}

css::uno::Reference< css::registry::XRegistryKey > Service::getRootKey()
{
    std::unique_lock g(mutex_);
    checkValid();
    return new RegistryKey(*this, cpo::uno::Any(access_));
}

bool Service::isReadOnly() {
    std::unique_lock g(mutex_);
    checkValid_RuntimeException();
    return readOnly_;
}

void Service::mergeKey(OUString const &, OUString const &)
{
    throw css::uno::RuntimeException(
        u"com.sun.star.configuration.ConfigurationRegistry: not implemented"_ustr,
        getXWeak());
}

void Service::flush()
{
    throw css::uno::RuntimeException(
        u"com.sun.star.configuration.ConfigurationRegistry: not implemented"_ustr,
        getXWeak());
}

void Service::addFlushListener(
    css::uno::Reference< css::util::XFlushListener > const &)
{
    throw css::uno::RuntimeException(
        u"com.sun.star.configuration.ConfigurationRegistry: not implemented"_ustr,
        getXWeak());
}

void Service::removeFlushListener(
    css::uno::Reference< css::util::XFlushListener > const &)
{
    throw css::uno::RuntimeException(
        u"com.sun.star.configuration.ConfigurationRegistry: not implemented"_ustr,
        getXWeak());
}

void Service::checkValid() {
    if (!access_.is()) {
        throw css::registry::InvalidRegistryException(
            u"com.sun.star.configuration.ConfigurationRegistry: not valid"_ustr,
            getXWeak());
    }
}

void Service::checkValid_RuntimeException() {
    if (!access_.is()) {
        throw css::uno::RuntimeException(
            u"com.sun.star.configuration.ConfigurationRegistry: not valid"_ustr,
            getXWeak());
    }
}

void Service::doClose() {
    access_.clear();
}

OUString RegistryKey::getKeyName() {
    std::unique_lock g(service_.mutex_);
    service_.checkValid_RuntimeException();
    css::uno::Reference< css::container::XNamed > named;
    if (value_ >>= named) {
        return named->getName();
    }
    throw css::uno::RuntimeException(
        u"com.sun.star.configuration.ConfigurationRegistry: not implemented"_ustr,
        getXWeak());
}

bool RegistryKey::isReadOnly()
{
    std::unique_lock g(service_.mutex_);
    service_.checkValid_RuntimeException();
    return service_.readOnly_; //TODO: read-only sub-nodes in update access?
}

bool RegistryKey::isValid() {
    return service_.isValid();
}

css::registry::RegistryKeyType RegistryKey::getKeyType(OUString const &)
{
    std::unique_lock g(service_.mutex_);
    service_.checkValid();
    return css::registry::RegistryKeyType_KEY;
}

css::registry::RegistryValueType RegistryKey::getValueType()
{
    std::unique_lock g(service_.mutex_);
    service_.checkValid();
    cpo::uno::Type t(value_.getValueType());
    switch (t.getTypeClass()) {
    case cpo::uno::TypeClass_LONG:
        return css::registry::RegistryValueType_LONG;
    case cpo::uno::TypeClass_STRING:
        return css::registry::RegistryValueType_STRING;
    case cpo::uno::TypeClass_SEQUENCE:
        if (t == cppu::UnoType< cpo::uno::Sequence< sal_Int8 > >::get()) {
            return css::registry::RegistryValueType_BINARY;
        } else if (t == cppu::UnoType< cpo::uno::Sequence< sal_Int32 > >::get())
        {
            return css::registry::RegistryValueType_LONGLIST;
        } else if (t ==
                   cppu::UnoType< cpo::uno::Sequence< OUString > >::get())
        {
            return css::registry::RegistryValueType_STRINGLIST;
        }
        [[fallthrough]];
    default:
        return css::registry::RegistryValueType_NOT_DEFINED;
    }
}

sal_Int32 RegistryKey::getLongValue()
{
    std::unique_lock g(service_.mutex_);
    service_.checkValid();
    sal_Int32 v1 = 0;
    if (value_ >>= v1) {
        return v1;
    }
    bool v2;
    if (value_ >>= v2) {
        return sal_Int32(v2);
    }
    throw css::registry::InvalidValueException(
        u"com.sun.star.configuration.ConfigurationRegistry"_ustr,
        getXWeak());
}

void RegistryKey::setLongValue(sal_Int32)
{
    throw css::uno::RuntimeException(
        u"com.sun.star.configuration.ConfigurationRegistry: not implemented"_ustr,
        getXWeak());
}

cpo::uno::Sequence< sal_Int32 > RegistryKey::getLongListValue()
{
    std::unique_lock g(service_.mutex_);
    service_.checkValid();
    cpo::uno::Sequence< sal_Int32 > v;
    if (value_ >>= v) {
        return v;
    }
    throw css::registry::InvalidValueException(
        u"com.sun.star.configuration.ConfigurationRegistry"_ustr,
        getXWeak());
}

void RegistryKey::setLongListValue(cpo::uno::Sequence< sal_Int32 > const &)
{
    throw css::uno::RuntimeException(
        u"com.sun.star.configuration.ConfigurationRegistry: not implemented"_ustr,
        getXWeak());
}

OUString RegistryKey::getAsciiValue()
{
    std::unique_lock g(service_.mutex_);
    service_.checkValid();
    OUString v;
    if (value_ >>= v) {
        return v;
    }
    throw css::registry::InvalidValueException(
        u"com.sun.star.configuration.ConfigurationRegistry"_ustr,
        getXWeak());
}

void RegistryKey::setAsciiValue(OUString const &)
{
    throw css::uno::RuntimeException(
        u"com.sun.star.configuration.ConfigurationRegistry: not implemented"_ustr,
        getXWeak());
}

cpo::uno::Sequence< OUString > RegistryKey::getAsciiListValue()
{
    std::unique_lock g(service_.mutex_);
    service_.checkValid();
    cpo::uno::Sequence< OUString > v;
    if (value_ >>= v) {
        return v;
    }
    throw css::registry::InvalidValueException(
        u"com.sun.star.configuration.ConfigurationRegistry"_ustr,
        getXWeak());
}

void RegistryKey::setAsciiListValue(cpo::uno::Sequence< OUString > const &)
{
    throw css::uno::RuntimeException(
        u"com.sun.star.configuration.ConfigurationRegistry: not implemented"_ustr,
        getXWeak());
}

OUString RegistryKey::getStringValue()
{
    std::unique_lock g(service_.mutex_);
    service_.checkValid();
    OUString v;
    if (value_ >>= v) {
        return v;
    }
    throw css::registry::InvalidValueException(
        u"com.sun.star.configuration.ConfigurationRegistry"_ustr,
        getXWeak());
}

void RegistryKey::setStringValue(OUString const &)
{
    throw css::uno::RuntimeException(
        u"com.sun.star.configuration.ConfigurationRegistry: not implemented"_ustr,
        getXWeak());
}

cpo::uno::Sequence< OUString > RegistryKey::getStringListValue()
{
    std::unique_lock g(service_.mutex_);
    service_.checkValid();
    cpo::uno::Sequence< OUString > v;
    if (value_ >>= v) {
        return v;
    }
    throw css::registry::InvalidValueException(
        u"com.sun.star.configuration.ConfigurationRegistry"_ustr,
        getXWeak());
}

void RegistryKey::setStringListValue(
    cpo::uno::Sequence< OUString > const &)
{
    throw css::uno::RuntimeException(
        u"com.sun.star.configuration.ConfigurationRegistry: not implemented"_ustr,
        getXWeak());
}

cpo::uno::Sequence< sal_Int8 > RegistryKey::getBinaryValue()
{
    std::unique_lock g(service_.mutex_);
    service_.checkValid();
    cpo::uno::Sequence< sal_Int8 > v;
    if (value_ >>= v) {
        return v;
    }
    throw css::registry::InvalidValueException(
        u"com.sun.star.configuration.ConfigurationRegistry"_ustr,
        getXWeak());
}

void RegistryKey::setBinaryValue(cpo::uno::Sequence< sal_Int8 > const &)
{
    throw css::uno::RuntimeException(
        u"com.sun.star.configuration.ConfigurationRegistry: not implemented"_ustr,
        getXWeak());
}

css::uno::Reference< css::registry::XRegistryKey > RegistryKey::openKey(
    OUString const & aKeyName)
{
    std::unique_lock g(service_.mutex_);
    service_.checkValid_RuntimeException();
    css::uno::Reference< css::container::XHierarchicalNameAccess > access;
    if (value_ >>= access) {
        try {
            return new RegistryKey(
                service_, access->getByHierarchicalName(aKeyName));
        } catch (css::container::NoSuchElementException &) {}
    }
    return css::uno::Reference< css::registry::XRegistryKey >();
}

css::uno::Reference< css::registry::XRegistryKey > RegistryKey::createKey(
    OUString const &)
{
    throw css::uno::RuntimeException(
        u"com.sun.star.configuration.ConfigurationRegistry: not implemented"_ustr,
        getXWeak());
}

void RegistryKey::closeKey()
{
    std::unique_lock g(service_.mutex_);
    service_.checkValid_RuntimeException();
}

void RegistryKey::deleteKey(OUString const &)
{
    throw css::uno::RuntimeException(
        u"com.sun.star.configuration.ConfigurationRegistry: not implemented"_ustr,
        getXWeak());
}

cpo::uno::Sequence< css::uno::Reference< css::registry::XRegistryKey > >
RegistryKey::openKeys()
{
    throw css::uno::RuntimeException(
        u"com.sun.star.configuration.ConfigurationRegistry: not implemented"_ustr,
        getXWeak());
}

cpo::uno::Sequence< OUString > RegistryKey::getKeyNames()
{
    throw css::uno::RuntimeException(
        u"com.sun.star.configuration.ConfigurationRegistry: not implemented"_ustr,
        getXWeak());
}

bool RegistryKey::createLink(OUString const &, OUString const &)
{
    std::unique_lock g(service_.mutex_);
    service_.checkValid_RuntimeException();
    return false;
}

void RegistryKey::deleteLink(OUString const &)
{
    std::unique_lock g(service_.mutex_);
    service_.checkValid_RuntimeException();
}

OUString RegistryKey::getLinkTarget(OUString const &)
{
    std::unique_lock g(service_.mutex_);
    service_.checkValid_RuntimeException();
    return OUString();
}

OUString RegistryKey::getResolvedName(OUString const & aKeyName)
{
    std::unique_lock g(service_.mutex_);
    service_.checkValid_RuntimeException();
    return aKeyName;
}

}

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

}

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