/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2011 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (info@qt.nokia.com)
**
**
** GNU Lesser General Public License Usage
**
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this file.
** Please review the following information to ensure the GNU Lesser General
** Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
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**************************************************************************/

#include "project.h"

#include "editorconfiguration.h"
#include "environment.h"
#include "projectexplorer.h"
#include "projectexplorerconstants.h"
#include "projectnodes.h"
#include "target.h"
#include "userfileaccessor.h"

#include <coreplugin/ifile.h>
#include <coreplugin/icontext.h>
#include <extensionsystem/pluginmanager.h>
#include <limits>
#include <utils/qtcassert.h>

/*!
    \class ProjectExplorer::Project

    \brief A project.
*/

/*!
   \fn void ProjectExplorer::Project::environmentChanged()

   \brief Convenience signal emitted if the activeBuildConfiguration emits environmentChanged
   or if the activeBuildConfiguration changes (including due to the active target changing).
*/

/*!
   \fn void ProjectExplorer::Project::buildConfigurationEnabledChanged()

   \brief Convenience signal emitted if the activeBuildConfiguration emits isEnabledChanged()
   or if the activeBuildConfiguration changes (including due to the active target changing).
*/

namespace {
const char * const ACTIVE_TARGET_KEY("ProjectExplorer.Project.ActiveTarget");
const char * const TARGET_KEY_PREFIX("ProjectExplorer.Project.Target.");
const char * const TARGET_COUNT_KEY("ProjectExplorer.Project.TargetCount");

const char * const EDITOR_SETTINGS_KEY("ProjectExplorer.Project.EditorSettings");

} // namespace

namespace ProjectExplorer {
// -------------------------------------------------------------------------
// Project
// -------------------------------------------------------------------------

class ProjectPrivate
{
public:
    ProjectPrivate();
    QList<Target *> m_targets;
    Target *m_activeTarget;
    EditorConfiguration *m_editorConfiguration;
    Core::Context m_projectContext;
    Core::Context m_projectLanguage;
};

ProjectPrivate::ProjectPrivate() :
    m_activeTarget(0),
    m_editorConfiguration(new EditorConfiguration())
{
}

Project::Project() : d(new ProjectPrivate)
{
}

Project::~Project()
{
    qDeleteAll(d->m_targets);
    delete d->m_editorConfiguration;
}

bool Project::hasActiveBuildSettings() const
{
    return activeTarget() &&
           activeTarget()->buildConfigurationFactory();
}

QString Project::makeUnique(const QString &preferredName, const QStringList &usedNames)
{
    if (!usedNames.contains(preferredName))
        return preferredName;
    int i = 2;
    QString tryName = preferredName + QString::number(i);
    while (usedNames.contains(tryName))
        tryName = preferredName + QString::number(++i);
    return tryName;
}

void Project::changeEnvironment()
{
    Target *t = qobject_cast<Target *>(sender());
    if (t == activeTarget())
        emit environmentChanged();
}

void Project::changeBuildConfigurationEnabled()
{
    Target *t = qobject_cast<Target *>(sender());
    if (t == activeTarget())
        emit buildConfigurationEnabledChanged();
}

void Project::addTarget(Target *t)
{
    QTC_ASSERT(t && !d->m_targets.contains(t), return);
    QTC_ASSERT(!target(t->id()), return);
    Q_ASSERT(t->project() == this);

    // Check that we don't have a configuration with the same displayName
    QString targetDisplayName = t->displayName();
    QStringList displayNames;
    foreach (const Target *target, d->m_targets)
        displayNames << target->displayName();
    targetDisplayName = makeUnique(targetDisplayName, displayNames);
    t->setDefaultDisplayName(targetDisplayName);

    // add it
    d->m_targets.push_back(t);
    connect(t, SIGNAL(environmentChanged()),
            SLOT(changeEnvironment()));
    connect(t, SIGNAL(buildConfigurationEnabledChanged()),
            this, SLOT(changeBuildConfigurationEnabled()));
    emit addedTarget(t);

    // check activeTarget:
    if (activeTarget() == 0)
        setActiveTarget(t);
}

void Project::removeTarget(Target *target)
{
    QTC_ASSERT(target && d->m_targets.contains(target), return);

    emit aboutToRemoveTarget(target);

    d->m_targets.removeOne(target);

    emit removedTarget(target);
    if (target == activeTarget()) {
        if (d->m_targets.isEmpty())
            setActiveTarget(0);
        else
            setActiveTarget(d->m_targets.at(0));
    }
    delete target;
}

QList<Target *> Project::targets() const
{
    return d->m_targets;
}

Target *Project::activeTarget() const
{
    return d->m_activeTarget;
}

void Project::setActiveTarget(Target *target)
{
    if ((!target && !d->m_targets.isEmpty()) ||
        (target && d->m_targets.contains(target) && d->m_activeTarget != target)) {
        d->m_activeTarget = target;
        emit activeTargetChanged(d->m_activeTarget);
        emit environmentChanged();
        emit buildConfigurationEnabledChanged();
    }
}

Target *Project::target(const QString &id) const
{
    foreach (Target * target, d->m_targets) {
        if (target->id() == id)
            return target;
    }
    return 0;
}

void Project::saveSettings()
{
    UserFileAccessor accessor;
    accessor.saveSettings(this, toMap());
}

bool Project::restoreSettings()
{
    UserFileAccessor accessor;
    QVariantMap map(accessor.restoreSettings(this));
    return fromMap(map);
}

QList<BuildConfigWidget*> Project::subConfigWidgets()
{
    return QList<BuildConfigWidget*>();
}

/*!
    \brief Serialize all data into a QVariantMap.

    This map is then saved in the .user file of the project.
    Just put all your data into the map.

    \note Do not forget to call your base class' toMap method.
    \note Do not forget to call setActiveBuildConfiguration when
          creating new BuilConfigurations.
*/

QVariantMap Project::toMap() const
{
    const QList<Target *> ts = targets();

    QVariantMap map;
    map.insert(QLatin1String(ACTIVE_TARGET_KEY), ts.indexOf(d->m_activeTarget));
    map.insert(QLatin1String(TARGET_COUNT_KEY), ts.size());
    for (int i = 0; i < ts.size(); ++i)
        map.insert(QString::fromLatin1(TARGET_KEY_PREFIX) + QString::number(i), ts.at(i)->toMap());

    map.insert(QLatin1String(EDITOR_SETTINGS_KEY), d->m_editorConfiguration->toMap());

    return map;
}

QString Project::projectDirectory() const
{
    return projectDirectory(file()->fileName());
}

QString Project::projectDirectory(const QString &proFile)
{
    if (proFile.isEmpty())
        return QString();
    QFileInfo info(proFile);
    return info.absoluteDir().path();
}


bool Project::fromMap(const QVariantMap &map)
{
    if (map.contains(QLatin1String(EDITOR_SETTINGS_KEY))) {
        QVariantMap values(map.value(QLatin1String(EDITOR_SETTINGS_KEY)).toMap());
        d->m_editorConfiguration->fromMap(values);
    }

    bool ok;
    int maxI(map.value(QLatin1String(TARGET_COUNT_KEY), 0).toInt(&ok));
    if (!ok || maxI < 0)
        maxI = 0;
    int active(map.value(QLatin1String(ACTIVE_TARGET_KEY), 0).toInt(&ok));
    if (!ok || active < 0)
        active = 0;
    if (0 > active || maxI < active)
        active = 0;

    for (int i = 0; i < maxI; ++i) {
        const QString key(QString::fromLatin1(TARGET_KEY_PREFIX) + QString::number(i));
        if (!map.contains(key)) {
            qWarning() << key << "was not found in data.";
            return false;
        }
        QVariantMap targetMap = map.value(key).toMap();

        QList<ITargetFactory *> factories =
                ExtensionSystem::PluginManager::instance()->getObjects<ITargetFactory>();

        Target *t = 0;

        const QString id = idFromMap(targetMap);
        if (target(id)) {
            qWarning("Warning: Duplicated target id found, not restoring second target with id '%s'. Continuing.",
                     qPrintable(id));
        } else {
            foreach (ITargetFactory *factory, factories) {
                if (factory->canRestore(this, targetMap)) {
                    t = factory->restore(this, targetMap);
                    break;
                }
            }

            if (!t) {
                qWarning("Warning: Unable to restore target '%s'. Continuing.", qPrintable(id));
                continue;
            }
            addTarget(t);
            if (i == active)
                setActiveTarget(t);
        }
    }
    return true;
}

EditorConfiguration *Project::editorConfiguration() const
{
    return d->m_editorConfiguration;
}

QString Project::generatedUiHeader(const QString & /* formFile */) const
{
    return QString();
}

void Project::setProjectContext(Core::Context context)
{
    d->m_projectContext = context;
}

void Project::setProjectLanguage(Core::Context language)
{
    d->m_projectLanguage = language;
}

Core::Context Project::projectContext() const
{
    return d->m_projectContext;
}

Core::Context Project::projectLanguage() const
{
    return d->m_projectLanguage;
}

} // namespace ProjectExplorer