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#include "clangindexer.h"
#include "clangutils.h"
#include "indexer.h"

#include <coreplugin/icore.h>
#include <coreplugin/progressmanager/progressmanager.h>
#include <cpptools/cppmodelmanager.h>
#include <projectexplorer/session.h>

#include <QDir>

using namespace ClangCodeModel;
using namespace ClangCodeModel::Internal;

ClangIndexingSupport::ClangIndexingSupport(ClangIndexer *indexer)
    : m_indexer(indexer)
{
}

ClangIndexingSupport::~ClangIndexingSupport()
{
}

QFuture<void> ClangIndexingSupport::refreshSourceFiles(
        const QSet<QString> &sourceFiles,
        CppTools::CppModelManager::ProgressNotificationMode mode)
{
    Q_UNUSED(mode);

    return m_indexer->refreshSourceFiles(sourceFiles);
}

CppTools::SymbolSearcher *ClangIndexingSupport::createSymbolSearcher(CppTools::SymbolSearcher::Parameters parameters, QSet<QString> fileNames)
{
    Q_UNUSED(parameters);
    Q_UNUSED(fileNames)
//    return new ClangSymbolSearcher(m_indexer, parameters, fileNames);
    return 0;
}

ClangIndexer::ClangIndexer()
    : QObject(0)
    , m_indexingSupport(new ClangIndexingSupport(this))
    , m_isLoadingSession(false)
    , m_clangIndexer(new Indexer(this))
{
    connect(m_clangIndexer, SIGNAL(indexingStarted(QFuture<void>,Internal::ProgressNotificationMode)),
            this, SLOT(onIndexingStarted(QFuture<void>,Internal::ProgressNotificationMode)));

    QObject *session = ProjectExplorer::SessionManager::instance();

    connect(session, SIGNAL(aboutToLoadSession(QString)),
            this, SLOT(onAboutToLoadSession(QString)));
    connect(session, SIGNAL(sessionLoaded(QString)),
            this, SLOT(onSessionLoaded(QString)));
    connect(session, SIGNAL(aboutToSaveSession()),
            this, SLOT(onAboutToSaveSession()));
}

ClangIndexer::~ClangIndexer()
{
    m_clangIndexer->cancel(true);
}

CppTools::CppIndexingSupport *ClangIndexer::indexingSupport()
{
    return m_indexingSupport.data();
}

QFuture<void> ClangIndexer::refreshSourceFiles(const QSet<QString> &sourceFiles)
{
    typedef CppTools::ProjectPart ProjectPart;
    CppTools::CppModelManager *modelManager = CppTools::CppModelManager::instance();

    if (m_clangIndexer->isBusy())
        m_clangIndexer->cancel(true);

    foreach (const QString &file, sourceFiles) {
        if (m_clangIndexer->isTracking(file))
            continue; // we get notified separately about open files.
        const QList<ProjectPart::Ptr> &parts = modelManager->projectPart(file);
        if (!parts.isEmpty())
            m_clangIndexer->addFile(file, parts.at(0));
        else
            m_clangIndexer->addFile(file, ProjectPart::Ptr());
    }

    if (!m_isLoadingSession)
        m_clangIndexer->regenerate();

    return QFuture<void>();
}

void ClangIndexer::match(ClangSymbolSearcher *searcher) const
{
    m_clangIndexer->match(searcher);
}

void ClangIndexer::onAboutToLoadSession(const QString &sessionName)
{
    m_isLoadingSession = true;

    if (sessionName == QLatin1String("default"))
        return;

    QString path = Core::ICore::instance()->userResourcePath() + QLatin1String("/codemodel/");
    if (QFile::exists(path) || QDir().mkpath(path))
        m_clangIndexer->initialize(path + sessionName + QLatin1String(".qci"));
}

void ClangIndexer::onSessionLoaded(QString)
{
    m_isLoadingSession = false;
    m_clangIndexer->regenerate();
}

void ClangIndexer::onAboutToSaveSession()
{
    m_clangIndexer->finalize();
}

void ClangIndexer::indexNow(Unit::Ptr unit)
{
    typedef CppTools::ProjectPart ProjectPart;

    QString file = unit->fileName();
    CppTools::CppModelManager *mmi = CppTools::CppModelManager::instance();
    const QList<ProjectPart::Ptr> &parts = mmi->projectPart(file);
    ProjectPart::Ptr part;
    if (!parts.isEmpty())
        part = parts.at(0);
    if (!m_isLoadingSession)
        m_clangIndexer->runQuickIndexing(unit, part);
}

void ClangIndexer::onIndexingStarted(QFuture<void> indexingFuture)
{
    Core::ProgressManager::addTask(indexingFuture, QCoreApplication::translate(
                                       "ClangCodeModel::Internal::ClangIndexer",
                                       "Parsing C/C++/ObjC Files"),
                                       "ClangCodeMode.Task.Indexing");
}