/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** Commercial Usage
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
**
** Alternatively, 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
**
**************************************************************************/

#include "qmakestep.h"

#include "projectexplorer/projectexplorerconstants.h"
#include "qmakeparser.h"
#include "qt4buildconfiguration.h"
#include "qt4project.h"
#include "qt4projectmanagerconstants.h"
#include "qt4projectmanager.h"
#include "qt4target.h"
#include "qtversionmanager.h"

#include <coreplugin/icore.h>
#include <utils/qtcassert.h>

#include <QtCore/QDir>
#include <QtCore/QFile>

using namespace Qt4ProjectManager;
using namespace Qt4ProjectManager::Internal;
using namespace ProjectExplorer;

namespace {
const char * const QMAKE_BS_ID("QtProjectManager.QMakeBuildStep");

const char * const QMAKE_ARGUMENTS_KEY("QtProjectManager.QMakeBuildStep.QMakeArguments");
}

QMakeStep::QMakeStep(Qt4BuildConfiguration *bc) :
    AbstractProcessStep(bc, QLatin1String(QMAKE_BS_ID)),
    m_forced(false)
{
    ctor();
}

QMakeStep::QMakeStep(Qt4BuildConfiguration *bc, const QString &id) :
    AbstractProcessStep(bc, id),
    m_forced(false)
{
    ctor();
}

QMakeStep::QMakeStep(Qt4BuildConfiguration *bc, QMakeStep *bs) :
    AbstractProcessStep(bc, bs),
    m_forced(false),
    m_userArgs(bs->m_userArgs)
{
    ctor();
}

void QMakeStep::ctor()
{
    setDisplayName(tr("qmake", "QMakeStep display name."));
}

QMakeStep::~QMakeStep()
{
}

Qt4BuildConfiguration *QMakeStep::qt4BuildConfiguration() const
{
    return static_cast<Qt4BuildConfiguration *>(buildConfiguration());
}

QStringList QMakeStep::allArguments()
{
    QStringList additonalArguments = m_userArgs;
    Qt4BuildConfiguration *bc = qt4BuildConfiguration();
    QStringList arguments;
    if (bc->subNodeBuild())
        arguments << bc->subNodeBuild()->path();
    else
        arguments << buildConfiguration()->target()->project()->file()->fileName();
    arguments << "-r";

    if (!additonalArguments.contains("-spec"))
        arguments << "-spec" << bc->qtVersion()->mkspec();

#if defined(Q_OS_WIN) || defined(Q_OS_MAC)
    ToolChain::ToolChainType type = bc->toolChainType();
    if (type == ToolChain::GCC_MAEMO)
        arguments << QLatin1String("-unix");
#endif
    if (bc->target()->id() == Constants::S60_DEVICE_TARGET_ID
        || bc->target()->id() == Constants::S60_EMULATOR_TARGET_ID) {
        // We have a target which does not allow shadow building.
        // But we really don't want to have the build artefacts in the source dir
        // so we try to hack around it, to make the common cases work.
        // This is a HACK, remove once the symbian make generator supports
        // shadow building
        arguments << QLatin1String("-after")
                  << QLatin1String("OBJECTS_DIR=obj")
                  << QLatin1String("MOC_DIR=moc")
                  << QLatin1String("UI_DIR=ui")
                  << QLatin1String("RCC_DIR=rcc");
    }

    // Find out what flags we pass on to qmake
    QStringList addedUserConfigArguments;
    QStringList removedUserConfigArguments;
    bc->getConfigCommandLineArguments(&addedUserConfigArguments, &removedUserConfigArguments);
    if (!removedUserConfigArguments.isEmpty()) {
        foreach (const QString &removedConfig, removedUserConfigArguments)
            arguments.append("CONFIG-=" + removedConfig);
    }
    if (!addedUserConfigArguments.isEmpty()) {
        foreach (const QString &addedConfig, addedUserConfigArguments)
            arguments.append("CONFIG+=" + addedConfig);
    }
    if (!additonalArguments.isEmpty())
        arguments << additonalArguments;

    return arguments;
}

bool QMakeStep::init()
{
    Qt4BuildConfiguration *qt4bc = qt4BuildConfiguration();
    const QtVersion *qtVersion = qt4bc->qtVersion();

    QStringList args = allArguments();
    QString workingDirectory;
    if (qt4bc->subNodeBuild())
        workingDirectory = qt4bc->subNodeBuild()->buildDir();
    else
        workingDirectory = qt4bc->buildDirectory();

    QString program = qtVersion->qmakeCommand();

    // Check whether we need to run qmake
    m_needToRunQMake = true;
    if (QDir(workingDirectory).exists(QLatin1String("Makefile"))) {
        QString qmakePath = QtVersionManager::findQMakeBinaryFromMakefile(workingDirectory);
        if (qtVersion->qmakeCommand() == qmakePath) {
            m_needToRunQMake = !qt4bc->compareToImportFrom(workingDirectory);
        }
    }

    if (m_forced) {
        m_forced = false;
        m_needToRunQMake = true;
    }

    setEnabled(m_needToRunQMake);
    setWorkingDirectory(workingDirectory);
    setCommand(program);
    setArguments(args);
    setEnvironment(qt4bc->environment());

    setOutputParser(new QMakeParser);

    Qt4Project *pro = qt4BuildConfiguration()->qt4Target()->qt4Project();
    QString proFile = pro->file()->fileName();
    m_tasks = qt4BuildConfiguration()->qtVersion()->reportIssues(proFile, workingDirectory);
    m_scriptTemplate = pro->rootProjectNode()->projectType() == ScriptTemplate;

    return AbstractProcessStep::init();
}

void QMakeStep::run(QFutureInterface<bool> &fi)
{
    if (m_scriptTemplate) {
        fi.reportResult(true);
        return;
    }

    // Warn on common error conditions:

    bool canContinue = true;
    foreach (const ProjectExplorer::Task &t, m_tasks) {
        addTask(t);
        if (t.type == Task::Error)
            canContinue = false;
    }
    if (!canContinue) {
        QTextCharFormat textCharFormat;
        textCharFormat.setForeground(Qt::blue);
        emit addOutput(tr("Configuration is faulty, please check the Build Issues view for details."), textCharFormat);
        fi.reportResult(false);
        return;
    }

    if (!m_needToRunQMake) {
        QTextCharFormat textCharFormat;
        textCharFormat.setForeground(Qt::blue);
        emit addOutput(tr("Configuration unchanged, skipping qmake step."), textCharFormat);
        fi.reportResult(true);
        return;
    }

    AbstractProcessStep::run(fi);
}

void QMakeStep::setForced(bool b)
{
    m_forced = b;
}

bool QMakeStep::forced()
{
    return m_forced;
}

ProjectExplorer::BuildStepConfigWidget *QMakeStep::createConfigWidget()
{
    return new QMakeStepConfigWidget(this);
}

bool QMakeStep::immutable() const
{
    return false;
}

void QMakeStep::processStartupFailed()
{
    m_forced = true;
    AbstractProcessStep::processStartupFailed();
}

bool QMakeStep::processSucceeded(int exitCode, QProcess::ExitStatus status)
{
    bool result = AbstractProcessStep::processSucceeded(exitCode, status);
    if (!result)
        m_forced = true;
    qt4BuildConfiguration()->emitBuildDirectoryInitialized();
    return result;
}

void QMakeStep::setUserArguments(const QStringList &arguments)
{
    if (m_userArgs == arguments)
        return;
    m_userArgs = arguments;

    emit userArgumentsChanged();

    qt4BuildConfiguration()->emitQMakeBuildConfigurationChanged();
}

QStringList QMakeStep::userArguments()
{
    return m_userArgs;
}

QVariantMap QMakeStep::toMap() const
{
    QVariantMap map(AbstractProcessStep::toMap());
    map.insert(QLatin1String(QMAKE_ARGUMENTS_KEY), m_userArgs);
    return map;
}

bool QMakeStep::fromMap(const QVariantMap &map)
{
    m_userArgs = map.value(QLatin1String(QMAKE_ARGUMENTS_KEY)).toStringList();

    return BuildStep::fromMap(map);
}

////
// QMakeStepConfigWidget
////

QMakeStepConfigWidget::QMakeStepConfigWidget(QMakeStep *step)
    : BuildStepConfigWidget(), m_step(step), m_ignoreChange(false)
{
    m_ui.setupUi(this);
    connect(m_ui.qmakeAdditonalArgumentsLineEdit, SIGNAL(textEdited(const QString&)),
            this, SLOT(qmakeArgumentsLineEdited()));
    connect(m_ui.buildConfigurationComboBox, SIGNAL(currentIndexChanged(int)),
            this, SLOT(buildConfigurationSelected()));
    connect(step, SIGNAL(userArgumentsChanged()),
            this, SLOT(userArgumentsChanged()));
    connect(step->qt4BuildConfiguration(), SIGNAL(qtVersionChanged()),
            this, SLOT(qtVersionChanged()));
    connect(step->qt4BuildConfiguration(), SIGNAL(qmakeBuildConfigurationChanged()),
            this, SLOT(qmakeBuildConfigChanged()));
}

void QMakeStepConfigWidget::init()
{
    QString qmakeArgs = ProjectExplorer::Environment::joinArgumentList(m_step->userArguments());
    m_ui.qmakeAdditonalArgumentsLineEdit->setText(qmakeArgs);

    qmakeBuildConfigChanged();

    updateSummaryLabel();
    updateEffectiveQMakeCall();
}

QString QMakeStepConfigWidget::summaryText() const
{
    return m_summaryText;
}

QString QMakeStepConfigWidget::displayName() const
{
    return m_step->displayName();
}

void QMakeStepConfigWidget::qtVersionChanged()
{
    updateSummaryLabel();
    updateEffectiveQMakeCall();
}

void QMakeStepConfigWidget::qmakeBuildConfigChanged()
{
    Qt4BuildConfiguration *bc = m_step->qt4BuildConfiguration();
    bool debug = bc->qmakeBuildConfiguration() & QtVersion::DebugBuild;
    m_ignoreChange = true;
    m_ui.buildConfigurationComboBox->setCurrentIndex(debug? 0 : 1);
    m_ignoreChange = false;
    updateSummaryLabel();
    updateEffectiveQMakeCall();
}

void QMakeStepConfigWidget::userArgumentsChanged()
{
    if (m_ignoreChange)
        return;
    QString qmakeArgs = ProjectExplorer::Environment::joinArgumentList(m_step->userArguments());
    m_ui.qmakeAdditonalArgumentsLineEdit->setText(qmakeArgs);
    updateSummaryLabel();
    updateEffectiveQMakeCall();
}

void QMakeStepConfigWidget::qmakeArgumentsLineEdited()
{
    m_ignoreChange = true;
    m_step->setUserArguments(
            ProjectExplorer::Environment::parseCombinedArgString(m_ui.qmakeAdditonalArgumentsLineEdit->text()));
    m_ignoreChange = false;

    updateSummaryLabel();
    updateEffectiveQMakeCall();
}

void QMakeStepConfigWidget::buildConfigurationSelected()
{
    if (m_ignoreChange)
        return;
    Qt4BuildConfiguration *bc = m_step->qt4BuildConfiguration();
    QtVersion::QmakeBuildConfigs buildConfiguration = bc->qmakeBuildConfiguration();
    if (m_ui.buildConfigurationComboBox->currentIndex() == 0) { // debug
        buildConfiguration = buildConfiguration | QtVersion::DebugBuild;
    } else {
        buildConfiguration = buildConfiguration & ~QtVersion::DebugBuild;
    }
    m_ignoreChange = true;
    bc->setQMakeBuildConfiguration(buildConfiguration);
    m_ignoreChange = false;

    updateSummaryLabel();
    updateEffectiveQMakeCall();
}

void QMakeStepConfigWidget::updateSummaryLabel()
{
    Qt4BuildConfiguration *qt4bc = m_step->qt4BuildConfiguration();
    const QtVersion *qtVersion = qt4bc->qtVersion();
    if (!qtVersion) {
        m_summaryText = tr("<b>qmake:</b> No Qt version set. Cannot run qmake.");
        emit updateSummary();
        return;
    }

    QStringList args = m_step->allArguments();
    // We don't want the full path to the .pro file
    const QString projectFileName = m_step->buildConfiguration()->target()->project()->file()->fileName();
    int index = args.indexOf(projectFileName);
    if (index != -1)
        args[index] = QFileInfo(projectFileName).fileName();

    // And we only use the .pro filename not the full path
    QString program = QFileInfo(qtVersion->qmakeCommand()).fileName();
    m_summaryText = tr("<b>qmake:</b> %1 %2").arg(program, args.join(QString(QLatin1Char(' '))));
    emit updateSummary();

}

void QMakeStepConfigWidget::updateEffectiveQMakeCall()
{
    Qt4BuildConfiguration *qt4bc = m_step->qt4BuildConfiguration();
    const QtVersion *qtVersion = qt4bc->qtVersion();
    QString program = QFileInfo(qtVersion->qmakeCommand()).fileName();
    m_ui.qmakeArgumentsEdit->setPlainText(program + QLatin1Char(' ') + ProjectExplorer::Environment::joinArgumentList(m_step->allArguments()));
}

////
// QMakeStepFactory
////

QMakeStepFactory::QMakeStepFactory(QObject *parent) :
    ProjectExplorer::IBuildStepFactory(parent)
{
}

QMakeStepFactory::~QMakeStepFactory()
{
}

bool QMakeStepFactory::canCreate(BuildConfiguration *parent, ProjectExplorer::StepType type, const QString &id) const
{
    if (type != ProjectExplorer::Build)
        return false;
    if (!qobject_cast<Qt4BuildConfiguration *>(parent))
        return false;
    return (id == QLatin1String(QMAKE_BS_ID));
}

ProjectExplorer::BuildStep *QMakeStepFactory::create(BuildConfiguration *parent, ProjectExplorer::StepType type,const QString &id)
{
    if (!canCreate(parent, type, id))
        return 0;
    Qt4BuildConfiguration *bc(qobject_cast<Qt4BuildConfiguration *>(parent));
    Q_ASSERT(bc);
    return new QMakeStep(bc);
}

bool QMakeStepFactory::canClone(BuildConfiguration *parent, ProjectExplorer::StepType type, BuildStep *source) const
{
    return canCreate(parent, type, source->id());
}

ProjectExplorer::BuildStep *QMakeStepFactory::clone(ProjectExplorer::BuildConfiguration *parent, ProjectExplorer::StepType type, ProjectExplorer::BuildStep *source)
{
    if (!canClone(parent, type, source))
        return 0;
    Qt4BuildConfiguration *bc(qobject_cast<Qt4BuildConfiguration *>(parent));
    Q_ASSERT(bc);
    return new QMakeStep(bc, qobject_cast<QMakeStep *>(source));
}

bool QMakeStepFactory::canRestore(ProjectExplorer::BuildConfiguration *parent, ProjectExplorer::StepType type, const QVariantMap &map) const
{
    QString id(ProjectExplorer::idFromMap(map));
    return canCreate(parent, type, id);
}

ProjectExplorer::BuildStep *QMakeStepFactory::restore(ProjectExplorer::BuildConfiguration *parent, ProjectExplorer::StepType type, const QVariantMap &map)
{
    if (!canRestore(parent, type, map))
        return 0;
    Qt4BuildConfiguration *bc(qobject_cast<Qt4BuildConfiguration *>(parent));
    Q_ASSERT(bc);
    QMakeStep *bs(new QMakeStep(bc));
    if (bs->fromMap(map))
        return bs;
    delete bs;
    return 0;
}

QStringList QMakeStepFactory::availableCreationIds(ProjectExplorer::BuildConfiguration *parent, ProjectExplorer::StepType type) const
{
    if (type == Build)
        if (Qt4BuildConfiguration *bc = qobject_cast<Qt4BuildConfiguration *>(parent))
            if (!bc->qmakeStep())
                return QStringList() << QLatin1String(QMAKE_BS_ID);
    return QStringList();
}

QString QMakeStepFactory::displayNameForId(const QString &id) const
{
    if (id == QLatin1String(QMAKE_BS_ID))
        return tr("qmake");
    return QString();
}