/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
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** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
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** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
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****************************************************************************/

#include "qbsprojectparser.h"

#include "qbslogsink.h"
#include "qbsproject.h"
#include "qbsprojectmanagerconstants.h"

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

#include <qbs.h>

#include <QCoreApplication>
#include <QDir>
#include <QFileInfo>
#include <QFutureWatcher>

using namespace Utils;

namespace QbsProjectManager {
namespace Internal {

// --------------------------------------------------------------------
// QbsProjectParser:
// --------------------------------------------------------------------

QbsProjectParser::QbsProjectParser(QbsProject *project, QFutureInterface<bool> *fi) :
    m_fi(fi)
{
    m_project = project->qbsProject();
    m_projectFilePath = project->projectFilePath().toString();
    auto * const watcher = new QFutureWatcher<bool>(this);
    connect(watcher, &QFutureWatcher<bool>::canceled, this, &QbsProjectParser::cancel);
    watcher->setFuture(fi->future());
}

QbsProjectParser::~QbsProjectParser()
{
    const auto deleteJob = [this](qbs::AbstractJob *job) {
        if (!job)
            return;
        if (job->state() == qbs::AbstractJob::StateFinished) {
            job->deleteLater();
            return;
        }
        connect(job, &qbs::AbstractJob::finished, job, &qbs::AbstractJob::deleteLater);
        job->cancel();
    };
    deleteJob(m_qbsSetupProjectJob);
    deleteJob(m_ruleExecutionJob);
    m_fi = nullptr; // we do not own m_fi, do not delete
}

void QbsProjectParser::parse(const QVariantMap &config, const Environment &env, const QString &dir,
                             const QString &configName)
{
    QTC_ASSERT(!m_qbsSetupProjectJob, return);
    QTC_ASSERT(!dir.isEmpty(), return);

    m_currentProgressBase = 0;

    qbs::SetupProjectParameters params;
    QVariantMap userConfig = config;
    QString specialKey = QLatin1String(Constants::QBS_CONFIG_PROFILE_KEY);
    const QString profileName = userConfig.take(specialKey).toString();
    params.setTopLevelProfile(profileName);
    params.setConfigurationName(configName);
    specialKey = QLatin1String(Constants::QBS_FORCE_PROBES_KEY);
    params.setForceProbeExecution(userConfig.take(specialKey).toBool());
    params.setSettingsDirectory(QbsManager::settings()->baseDirectory());
    params.setOverriddenValues(userConfig);

    // Some people don't like it when files are created as a side effect of opening a project,
    // so do not store the build graph if the build directory does not exist yet.
    m_dryRun = !QFileInfo::exists(dir);
    params.setDryRun(m_dryRun);

    params.setBuildRoot(dir);
    params.setProjectFilePath(m_projectFilePath);
    params.setOverrideBuildGraphData(true);
    params.setEnvironment(env.toProcessEnvironment());
    const qbs::Preferences prefs(QbsManager::settings(), profileName);
    params.setSearchPaths(prefs.searchPaths(resourcesBaseDirectory()));
    params.setPluginPaths(prefs.pluginPaths(pluginsBaseDirectory()));
    params.setLibexecPath(libExecDirectory());
    params.setProductErrorMode(qbs::ErrorHandlingMode::Relaxed);
    params.setPropertyCheckingMode(qbs::ErrorHandlingMode::Relaxed);
    params.setLogElapsedTime(!qEnvironmentVariableIsEmpty(Constants::QBS_PROFILING_ENV));

    m_qbsSetupProjectJob = m_project.setupProject(params, QbsManager::logSink(), nullptr);

    connect(m_qbsSetupProjectJob, &qbs::AbstractJob::finished,
            this, &QbsProjectParser::handleQbsParsingDone);
    connect(m_qbsSetupProjectJob, &qbs::AbstractJob::taskStarted,
            this, &QbsProjectParser::handleQbsParsingTaskSetup);
    connect(m_qbsSetupProjectJob, &qbs::AbstractJob::taskProgress,
            this, &QbsProjectParser::handleQbsParsingProgress);
}

void QbsProjectParser::cancel()
{
    QTC_ASSERT(m_qbsSetupProjectJob, return);
    if (m_ruleExecutionJob)
        m_ruleExecutionJob->cancel();
    else
        m_qbsSetupProjectJob->cancel();
}

qbs::Project QbsProjectParser::qbsProject() const
{
    return m_project;
}

qbs::ErrorInfo QbsProjectParser::error()
{
    return m_error;
}

void QbsProjectParser::handleQbsParsingDone(bool success)
{
    QTC_ASSERT(m_qbsSetupProjectJob, return);

    m_project = m_qbsSetupProjectJob->project();
    m_error = m_qbsSetupProjectJob->error();

    // Do not report the operation as canceled here, as we might want to make overlapping
    // parses appear atomic to the user.

    emit done(success);
}

void QbsProjectParser::startRuleExecution()
{
    qbs::BuildOptions options;
    options.setDryRun(m_dryRun);
    options.setExecuteRulesOnly(true);
    m_ruleExecutionJob = m_project.buildAllProducts(
                options, qbs::Project::ProductSelectionWithNonDefault, nullptr);
    connect(m_ruleExecutionJob, &qbs::AbstractJob::finished,
            this, &QbsProjectParser::handleRuleExecutionDone);
    connect(m_ruleExecutionJob, &qbs::AbstractJob::taskStarted,
            this, &QbsProjectParser::handleQbsParsingTaskSetup);
    connect(m_ruleExecutionJob, &qbs::AbstractJob::taskProgress,
            this, &QbsProjectParser::handleQbsParsingProgress);
}

void QbsProjectParser::handleRuleExecutionDone()
{
    QTC_ASSERT(m_ruleExecutionJob, return);

    // Execution of some very dynamic rules might fail due
    // to artifacts not being present. No genuine errors will get lost, as they will re-appear
    // on the next build attempt.
    emit ruleExecutionDone();
}

void QbsProjectParser::handleQbsParsingProgress(int progress)
{
    if (m_fi)
        m_fi->setProgressValue(m_currentProgressBase + progress);
}

void QbsProjectParser::handleQbsParsingTaskSetup(const QString &description, int maximumProgressValue)
{
    Q_UNUSED(description);
    if (m_fi) {
        m_currentProgressBase = m_fi->progressValue();
        m_fi->setProgressRange(0, m_currentProgressBase + maximumProgressValue);
    }
}

QString QbsProjectParser::resourcesBaseDirectory() const
{
    const QString qbsInstallDir = QLatin1String(QBS_INSTALL_DIR);
    if (!qbsInstallDir.isEmpty())
        return qbsInstallDir;
    return Core::ICore::resourcePath() + QLatin1String("/qbs");
}

QString QbsProjectParser::libExecDirectory() const
{
    const QString qbsInstallDir = QLatin1String(QBS_INSTALL_DIR);
    if (!qbsInstallDir.isEmpty())
        return qbsInstallDir + QLatin1String("/libexec");
    return Core::ICore::libexecPath();
}

QString QbsProjectParser::pluginsBaseDirectory() const
{
    const QString qbsInstallDir = QLatin1String(QBS_INSTALL_DIR);

    // Note: We assume here that Qt Creator and qbs use the same name for their library dir.
    const QString qbsLibDirName = QLatin1String(IDE_LIBRARY_BASENAME);

    if (!qbsInstallDir.isEmpty())
        return qbsInstallDir + QLatin1Char('/') + qbsLibDirName;
    if (HostOsInfo::isMacHost())
        return QDir::cleanPath(QCoreApplication::applicationDirPath()
                               + QLatin1String("/../PlugIns"));
    else
        return QDir::cleanPath(QCoreApplication::applicationDirPath()
                               + QLatin1String("/../" IDE_LIBRARY_BASENAME "/qtcreator/plugins"));
}

} // namespace Internal
} // namespace QbsProjectManager