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#include "cppmodelmanagerinterface.h"

#include <cplusplus/pp-engine.h>

#include <projectexplorer/headerpath.h>
#include <projectexplorer/toolchain.h>

#include <QSet>

using namespace CppTools;
using namespace ProjectExplorer;

/*!
    \enum CppTools::CppModelManagerInterface::ProgressNotificationMode

    This enum type specifies whether a progress bar notification should be
    shown if more than one file is requested to update via
    CppModelManagerInterface::updateSourceFiles().

    \value ForcedProgressNotification
           Notify regardless of the number of files requested for update.
    \value ReservedProgressNotification
           Notify only if more than one file is requested for update.
*/

/*!
    \enum CppTools::CppModelManagerInterface::QtVersion

    Allows C++ parser engine to inject headers or change inner settings as
    needed to parse Qt language extensions for concrete major Qt version

    \value UnknownQt
           Parser may choose any policy
    \value NoQt
           Parser must not use special tricks, because it parses non-qt project
    \value Qt4
           Parser may enable tricks for Qt v4.x
    \value Qt5
           Parser may enable tricks for Qt v5.x
*/

/*!
    \fn virtual QFuture<void> updateProjectInfo(const ProjectInfo &pinfo) = 0;
    \param pinfo Updated ProjectInfo.
    \return A future that reports progress and allows to cancel the reparsing operation.

    This function is expected to be called by the project managers to update the
    code model with new project information.

    In particular, the function should be called in case:
        1. A new project is opened/created
        2. The project configuration changed. This includes
             2.1 Changes of defines, includes, framework paths
             2.2 Addition/Removal of project files

    \sa CppTools::CppModelManagerInterface::updateSourceFiles()
*/

/*!
    \fn virtual QFuture<void> updateSourceFiles(const QStringList &sourceFiles, ProgressNotificationMode mode = ReservedProgressNotification) = 0;
    \param sourceFiles List of source file to update. The items are absolute paths.
    \param mode The progress modification mode.
    \return A future that reports progress and allows to cancel the reparsing operation.

    Trigger an asynchronous reparsing of the given source files.

    This function is not meant to be called by the project managers.

    \sa CppTools::CppModelManagerInterface::ProgressNotificationMode
    \sa CppTools::CppModelManagerInterface::updateProjectInfo()
*/

ProjectPart::ProjectPart()
    : project(0)
    , cVersion(C89)
    , cxxVersion(CXX11)
    , cxxExtensions(NoExtensions)
    , qtVersion(UnknownQt)
    , cWarningFlags(ProjectExplorer::ToolChain::WarningsDefault)
    , cxxWarningFlags(ProjectExplorer::ToolChain::WarningsDefault)

{
}

/*!
    \brief Retrieves info from concrete compiler using it's flags.

    \param tc Either nullptr or toolchain for project's active target.
    \param cxxflags C++ or Objective-C++ flags.
    \param cflags C or ObjectiveC flags if possible, \a cxxflags otherwise.
*/
void ProjectPart::evaluateToolchain(const ToolChain *tc,
                                    const QStringList &cxxflags,
                                    const QStringList &cflags,
                                    const Utils::FileName &sysRoot)
{
    if (!tc)
        return;

    ToolChain::CompilerFlags cxx = tc->compilerFlags(cxxflags);
    ToolChain::CompilerFlags c = (cxxflags == cflags)
            ? cxx : tc->compilerFlags(cflags);

    if (c & ToolChain::StandardC11)
        cVersion = C11;
    else if (c & ToolChain::StandardC99)
        cVersion = C99;
    else
        cVersion = C89;

    if (cxx & ToolChain::StandardCxx11)
        cxxVersion = CXX11;
    else
        cxxVersion = CXX98;

    if (cxx & ToolChain::BorlandExtensions)
        cxxExtensions |= BorlandExtensions;
    if (cxx & ToolChain::GnuExtensions)
        cxxExtensions |= GnuExtensions;
    if (cxx & ToolChain::MicrosoftExtensions)
        cxxExtensions |= MicrosoftExtensions;
    if (cxx & ToolChain::OpenMP)
        cxxExtensions |= OpenMPExtensions;

    cWarningFlags = tc->warningFlags(cflags);
    cxxWarningFlags = tc->warningFlags(cxxflags);

    const QList<ProjectExplorer::HeaderPath> headers = tc->systemHeaderPaths(cxxflags, sysRoot);
    foreach (const ProjectExplorer::HeaderPath &header, headers) {
        headerPaths << HeaderPath(header.path(),
                                  header.kind() == ProjectExplorer::HeaderPath::FrameworkHeaderPath
                                  ? HeaderPath::FrameworkPath : HeaderPath::IncludePath);
    }

    toolchainDefines = tc->predefinedMacros(cxxflags);
}

const QString CppModelManagerInterface::configurationFileName()
{ return CPlusPlus::Preprocessor::configurationFileName; }

const QString CppModelManagerInterface::editorConfigurationFileName()
{
    return QLatin1String("<per-editor-defines>");
}

CppModelManagerInterface::CppModelManagerInterface(QObject *parent)
    : CPlusPlus::CppModelManagerBase(parent)
{ }

CppModelManagerInterface::~CppModelManagerInterface()
{ }

CppModelManagerInterface *CppModelManagerInterface::instance()
{
    return qobject_cast<CppModelManagerInterface *>(CPlusPlus::CppModelManagerBase::instance());
}

void CppModelManagerInterface::ProjectInfo::clearProjectParts()
{
    m_projectParts.clear();
    m_headerPaths.clear();
    m_sourceFiles.clear();
    m_defines.clear();
}

void CppModelManagerInterface::ProjectInfo::appendProjectPart(const ProjectPart::Ptr &part)
{
    if (!part)
        return;

    m_projectParts.append(part);

    typedef ProjectPart::HeaderPath HeaderPath;

    // Update header paths
    QSet<HeaderPath> incs = QSet<HeaderPath>::fromList(m_headerPaths);
    foreach (const HeaderPath &hp, part->headerPaths) {
        if (!incs.contains(hp)) {
            incs.insert(hp);
            m_headerPaths += hp;
        }
    }

    // Update source files
    QSet<QString> srcs = QSet<QString>::fromList(m_sourceFiles);
    foreach (const ProjectFile &file, part->files)
        srcs.insert(file.path);
    m_sourceFiles = srcs.toList();

    // Update defines
    if (!m_defines.isEmpty())
        m_defines.append('\n');
    m_defines.append(part->toolchainDefines);
    m_defines.append(part->projectDefines);
    if (!part->projectConfigFile.isEmpty()) {
        m_defines.append('\n');
        m_defines += readProjectConfigFile(part);
        m_defines.append('\n');
    }
}

QByteArray CppModelManagerInterface::readProjectConfigFile(const ProjectPart::Ptr &part)
{
    QByteArray result;

    QFile f(part->projectConfigFile);
    if (f.open(QIODevice::ReadOnly)) {
        QTextStream is(&f);
        result = is.readAll().toUtf8();
        f.close();
    }

    return result;
}