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#include "basefilefilter.h"

#include <coreplugin/editormanager/editormanager.h>
#include <utils/fileutils.h>

#include <QDir>
#include <QStringMatcher>

using namespace Core;
using namespace Core;
using namespace Utils;

BaseFileFilter::BaseFileFilter()
  : m_forceNewSearchList(false)
{
}

QList<LocatorFilterEntry> BaseFileFilter::matchesFor(QFutureInterface<Core::LocatorFilterEntry> &future, const QString &origEntry)
{
    updateFiles();
    QList<LocatorFilterEntry> betterEntries;
    QList<LocatorFilterEntry> goodEntries;
    QString needle = trimWildcards(QDir::fromNativeSeparators(origEntry));
    const QString lineNoSuffix = EditorManager::splitLineNumber(&needle);
    QStringMatcher matcher(needle, Qt::CaseInsensitive);
    const QChar asterisk = QLatin1Char('*');
    QRegExp regexp(asterisk + needle+ asterisk, Qt::CaseInsensitive, QRegExp::Wildcard);
    if (!regexp.isValid())
        return betterEntries;
    const QChar pathSeparator(QLatin1Char('/'));
    const bool hasPathSeparator = needle.contains(pathSeparator);
    const bool hasWildcard = needle.contains(asterisk) || needle.contains(QLatin1Char('?'));
    QStringList searchListPaths;
    QStringList searchListNames;
    const bool containsPreviousEntry = !m_previousEntry.isEmpty()
            && needle.contains(m_previousEntry);
    const bool pathSeparatorAdded = !m_previousEntry.contains(pathSeparator)
            && needle.contains(pathSeparator);
    if (!m_forceNewSearchList && containsPreviousEntry && !pathSeparatorAdded) {
        searchListPaths = m_previousResultPaths;
        searchListNames = m_previousResultNames;
    } else {
        searchListPaths = m_files;
        searchListNames = m_fileNames;
    }
    m_previousResultPaths.clear();
    m_previousResultNames.clear();
    m_forceNewSearchList = false;
    m_previousEntry = needle;
    const Qt::CaseSensitivity caseSensitivityForPrefix = caseSensitivity(needle);
    QStringListIterator paths(searchListPaths);
    QStringListIterator names(searchListNames);
    while (paths.hasNext() && names.hasNext()) {
        if (future.isCanceled())
            break;

        QString path = paths.next();
        QString name = names.next();
        QString matchText = hasPathSeparator ? path : name;
        if ((hasWildcard && regexp.exactMatch(matchText))
                || (!hasWildcard && matcher.indexIn(matchText) != -1)) {
            QFileInfo fi(path);
            LocatorFilterEntry entry(this, fi.fileName(), QString(path + lineNoSuffix));
            entry.extraInfo = FileUtils::shortNativePath(FileName(fi));
            entry.fileName = path;
            if (matchText.startsWith(needle, caseSensitivityForPrefix))
                betterEntries.append(entry);
            else
                goodEntries.append(entry);
            m_previousResultPaths.append(path);
            m_previousResultNames.append(name);
        }
    }

    betterEntries.append(goodEntries);
    return betterEntries;
}

void BaseFileFilter::accept(Core::LocatorFilterEntry selection) const
{
    EditorManager::openEditor(selection.internalData.toString(), Id(),
                              EditorManager::CanContainLineNumber);
}

void BaseFileFilter::generateFileNames()
{
    m_fileNames.clear();
    foreach (const QString &fileName, m_files) {
        QFileInfo fi(fileName);
        m_fileNames.append(fi.fileName());
    }
    m_forceNewSearchList = true;
}

void BaseFileFilter::updateFiles()
{
}