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#include "baseeditordocumentparser.h"

#include "editordocumenthandle.h"

namespace CppTools {

/*!
    \class CppTools::BaseEditorDocumentParser

    \brief The BaseEditorDocumentParser class parses a source text as
           precisely as possible.

    It's meant to be used in the C++ editor to get precise results by using
    the "best" project part for a file.

    Derived classes are expected to implement update() by using the protected
    mutex, updateProjectPart() and by respecting the options set by the client.
*/

BaseEditorDocumentParser::BaseEditorDocumentParser(const QString &filePath)
    : m_mutex(QMutex::Recursive)
    , m_filePath(filePath)
    , m_usePrecompiledHeaders(false)
    , m_editorDefinesChangedSinceLastUpdate(false)
{
}

BaseEditorDocumentParser::~BaseEditorDocumentParser()
{
}

QString BaseEditorDocumentParser::filePath() const
{
    return m_filePath;
}

ProjectPart::Ptr BaseEditorDocumentParser::projectPart() const
{
    QMutexLocker locker(&m_mutex);
    return m_projectPart;
}

void BaseEditorDocumentParser::setProjectPart(ProjectPart::Ptr projectPart)
{
    QMutexLocker locker(&m_mutex);
    m_manuallySetProjectPart = projectPart;
}

bool BaseEditorDocumentParser::usePrecompiledHeaders() const
{
    QMutexLocker locker(&m_mutex);
    return m_usePrecompiledHeaders;
}

void BaseEditorDocumentParser::setUsePrecompiledHeaders(bool usePrecompiledHeaders)
{
    QMutexLocker locker(&m_mutex);
    m_usePrecompiledHeaders = usePrecompiledHeaders;
}

QByteArray BaseEditorDocumentParser::editorDefines() const
{
    QMutexLocker locker(&m_mutex);
    return m_editorDefines;
}

void BaseEditorDocumentParser::setEditorDefines(const QByteArray &editorDefines)
{
    QMutexLocker locker(&m_mutex);

    if (editorDefines != m_editorDefines) {
        m_editorDefines = editorDefines;
        m_editorDefinesChangedSinceLastUpdate = true;
    }
}

BaseEditorDocumentParser *BaseEditorDocumentParser::get(const QString &filePath)
{
    CppModelManager *cmmi = CppModelManager::instance();
    if (EditorDocumentHandle *editorDocument = cmmi->editorDocument(filePath)) {
        if (BaseEditorDocumentProcessor *processor = editorDocument->processor())
            return processor->parser();
    }
    return 0;
}

void BaseEditorDocumentParser::updateProjectPart()
{
    if (m_manuallySetProjectPart) {
        m_projectPart = m_manuallySetProjectPart;
        return;
    }

    CppModelManager *cmm = CppModelManager::instance();
    QList<ProjectPart::Ptr> projectParts = cmm->projectPart(m_filePath);
    if (projectParts.isEmpty()) {
        if (m_projectPart)
            // File is not directly part of any project, but we got one before. We will re-use it,
            // because re-calculating this can be expensive when the dependency table is big.
            return;

        // Fall-back step 1: Get some parts through the dependency table:
        projectParts = cmm->projectPartFromDependencies(m_filePath);
        if (projectParts.isEmpty())
            // Fall-back step 2: Use fall-back part from the model manager:
            m_projectPart = cmm->fallbackProjectPart();
        else
            m_projectPart = projectParts.first();
    } else {
        if (!projectParts.contains(m_projectPart))
            // Apparently the project file changed, so update our project part.
            m_projectPart = projectParts.first();
    }
}

bool BaseEditorDocumentParser::editorDefinesChanged() const
{
    return m_editorDefinesChangedSinceLastUpdate;
}

void BaseEditorDocumentParser::resetEditorDefinesChanged()
{
    m_editorDefinesChangedSinceLastUpdate = false;
}

} // namespace CppTools
