/*
 * Cppcheck - A tool for static C/C++ code analysis
 * Copyright (C) 2007-2020 Cppcheck team.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */


#ifndef THREADHANDLER_H
#define THREADHANDLER_H

#include <QObject>
#include <QStringList>
#include <QDateTime>
#include <set>
#include "threadresult.h"
#include "suppressions.h"

class ResultsView;
class CheckThread;
class QSettings;
class Settings;
class ImportProject;

/// @addtogroup GUI
/// @{


/**
* @brief This class handles creating threadresult and starting threads
*
*/
class ThreadHandler : public QObject {
 Q_OBJECT
public:
 explicit ThreadHandler(QObject *parent = nullptr);
 virtual ~ThreadHandler();

 /**
 * @brief Set the number of threads to use
 * @param count The number of threads to use
 */
 void setThreadCount(const int count);

 /**
 * @brief Initialize the threads (connect all signals to resultsview's slots)
 *
 * @param view View to show error results
 */
 void initialize(ResultsView *view);

 /**
 * @brief Load settings
 * @param settings QSettings to load settings from
 */
 void loadSettings(QSettings &settings);

 /**
 * @brief Save settings
 * @param settings QSettings to save settings to
 */
 void saveSettings(QSettings &settings) const;

 void setAddonsAndTools(const QStringList &addonsAndTools) {
 mAddonsAndTools = addonsAndTools;
 }

 void setSuppressions(const QList<Suppressions::Suppression> &s) {
 mSuppressions = s;
 }

 void setClangIncludePaths(const QStringList &s) {
 mClangIncludePaths = s;
 }

 void setDataDir(const QString &dataDir) {
 mDataDir = dataDir;
 }

 /**
 * @brief Clear all files from cppcheck
 *
 */
 void clearFiles();

 /**
 * @brief Set files to check
 *
 * @param files files to check
 */
 void setFiles(const QStringList &files);

 /**
 * @brief Set project to check
 *
 * @param prj project to check
 */
 void setProject(const ImportProject &prj);

 /**
 * @brief Start the threads to check the files
 *
 * @param settings Settings for checking
 */
 void check(const Settings &settings);

 /**
 * @brief Set files to check
 *
 * @param all true if all files, false if modified files
 */
 void setCheckFiles(bool all);

 /**
 * @brief Set selected files to check
 *
 * @param files list of files to be checked
 */
 void setCheckFiles(const QStringList& files);

 /**
 * @brief Is checking running?
 *
 * @return true if check is running, false otherwise.
 */
 bool isChecking() const;

 /**
 * @brief Have we checked files already?
 *
 * @return true check has been previously run and recheck can be done
 */
 bool hasPreviousFiles() const;

 /**
 * @brief Return count of files we checked last time.
 *
 * @return count of files that were checked last time.
 */
 int getPreviousFilesCount() const;

 /**
 * @brief Return the time elapsed while scanning the previous time.
 *
 * @return the time elapsed in milliseconds.
 */
 int getPreviousScanDuration() const;

 /**
 * @brief Get files that should be rechecked because they have been
 * changed.
 */
 QStringList getReCheckFiles(bool all) const;

 /**
 * @brief Get start time of last check
 *
 * @return start time of last check
 */
 QDateTime getCheckStartTime() const;

 /**
 * @brief Set start time of check
 *
 * @param checkStartTime saved start time of the last check
 */
 void setCheckStartTime(QDateTime checkStartTime);

signals:
 /**
 * @brief Signal that all threads are done
 *
 */
 void done();

 void log(const QString &msg);

 void debugError(const ErrorItem &item);

 void bughuntingReportLine(QString line);

public slots:

 /**
 * @brief Slot to stop all threads
 *
 */
 void stop();
protected slots:
 /**
 * @brief Slot that a single thread is done
 *
 */
 void threadDone();
protected:
 /**
 * @brief List of files checked last time (used when rechecking)
 *
 */
 QStringList mLastFiles;

 /** @brief date and time when current checking started */
 QDateTime mCheckStartTime;

 /**
 * @brief when was the files checked the last time (used when rechecking)
 */
 QDateTime mLastCheckTime;

 /**
 * @brief Timer used for measuring scan duration
 *
 */
 QTime mTime;

 /**
 * @brief The previous scan duration in milliseconds.
 *
 */
 int mScanDuration;

 /**
 * @brief Function to delete all threads
 *
 */
 void removeThreads();

 /**
 * @brief Thread results are stored here
 *
 */
 ThreadResult mResults;

 /**
 * @brief List of threads currently in use
 *
 */
 QList<CheckThread *> mThreads;

 /**
 * @brief The amount of threads currently running
 *
 */
 int mRunningThreadCount;

 bool mAnalyseWholeProgram;

 QStringList mAddonsAndTools;
 QList<Suppressions::Suppression> mSuppressions;
 QStringList mClangIncludePaths;

 QString mDataDir;
private:

 /**
 * @brief Check if a file needs to be rechecked. Recursively checks
 * included headers. Used by GetReCheckFiles()
 */
 bool needsReCheck(const QString &filename, std::set<QString> &modified, std::set<QString> &unmodified) const;
};
/// @}
#endif // THREADHANDLER_H