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

#include "com/sun/star/lang/WrappedTargetException.hpp"
#include "com/sun/star/uno/RuntimeException.hpp"
#include "com/sun/star/util/ChangesSet.hpp"
#include "com/sun/star/util/ElementChange.hpp"
#include "com/sun/star/util/XChangesListener.hpp"
#include "comphelper/sequenceasvector.hxx"
#include "cppu/unotype.hxx"
#include "cppuhelper/weak.hxx"
#include "osl/diagnose.h"
#include "osl/mutex.hxx"
#include "rtl/ref.hxx"
#include "rtl/ustring.h"
#include "rtl/ustring.hxx"

#include "childaccess.hxx"
#include "components.hxx"
#include "lock.hxx"
#include "node.hxx"
#include "rootaccess.hxx"

namespace configmgr {

namespace {

namespace css = com::sun::star;

}

RootAccess::RootAccess(
    rtl::OUString const & path, rtl::OUString const & locale, bool update):
    path_(path), locale_(locale), update_(update)
{}

rtl::OUString RootAccess::getLocale() const {
    return locale_; //TODO: handle locale_ == ""
}

bool RootAccess::isUpdate() const {
    return update_;
}

RootAccess::~RootAccess() {}

rtl::Reference< Node > RootAccess::getNode() {
    if (!node_.is()) {
        node_ = Components::singleton().resolvePath(path_, &name_);
        if (!node_.is()) {
            throw css::uno::RuntimeException(
                (rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("cannot find ")) +
                 path_),
                static_cast< cppu::OWeakObject * >(this));
        }
    }
    return node_;
}

rtl::Reference< RootAccess > RootAccess::getRootAccess() {
    return this;
}

rtl::Reference< Access > RootAccess::getParentAccess() {
    return rtl::Reference< Access >();
}

rtl::OUString RootAccess::getName() throw (css::uno::RuntimeException) {
    osl::MutexGuard g(lock);
    getNode();
    return name_;
}

void RootAccess::addChangesListener(
    css::uno::Reference< css::util::XChangesListener > const & aListener)
    throw (css::uno::RuntimeException)
{
    OSL_ASSERT(thisIs(IS_ANY));
    rBHelper.addListener(
        cppu::UnoType< css::util::XChangesListener >::get(), aListener);
}

void RootAccess::removeChangesListener(
    css::uno::Reference< css::util::XChangesListener > const & aListener)
    throw (css::uno::RuntimeException)
{
    OSL_ASSERT(thisIs(IS_ANY));
    rBHelper.removeListener(
        cppu::UnoType< css::util::XChangesListener >::get(), aListener);
}

void RootAccess::commitChanges()
    throw (css::lang::WrappedTargetException, css::uno::RuntimeException)
{
    OSL_ASSERT(thisIs(IS_ANY|IS_UPDATE));
    osl::MutexGuard g(lock);
    while (!modifiedChildren_.empty()) {
        rtl::Reference< ChildAccess > child(modifiedChildren_.begin()->second);
        child->commitChanges();
        modifiedChildren_.erase(modifiedChildren_.begin());
    }
    //TODO: write changes to disk
}

sal_Bool RootAccess::hasPendingChanges() throw (css::uno::RuntimeException) {
    OSL_ASSERT(thisIs(IS_ANY|IS_UPDATE));
    return getPendingChanges().getLength() != 0; //TODO: optimize
}

css::util::ChangesSet RootAccess::getPendingChanges()
    throw (css::uno::RuntimeException)
{
    OSL_ASSERT(thisIs(IS_ANY|IS_UPDATE));
    osl::MutexGuard g(lock);
    comphelper::SequenceAsVector< css::util::ElementChange > changes;
    for (HardChildMap::iterator i(modifiedChildren_.begin());
         i != modifiedChildren_.end(); ++i)
    {
        i->second->reportChanges(&changes);
    }
    return changes.getAsConstList();
}

}