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** Copyright (C) 2015 Brian McGillion and Hugues Delorme
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#ifndef VCSBASE_COMMAND_H
#define VCSBASE_COMMAND_H

#include "vcsbase_global.h"

#include <QObject>

QT_BEGIN_NAMESPACE
class QMutex;
class QStringList;
class QVariant;
class QProcessEnvironment;
template <typename T>
class QFutureInterface;
QT_END_NAMESPACE

namespace Utils {
struct SynchronousProcessResponse;
class ExitCodeInterpreter;
class FileName;
}

namespace VcsBase {

namespace Internal { class VcsCommandPrivate; }

class VCSBASE_EXPORT ProgressParser
{
public:
    ProgressParser();
    virtual ~ProgressParser();

protected:
    virtual void parseProgress(const QString &text) = 0;
    void setProgressAndMaximum(int value, int maximum);

private:
    void setFuture(QFutureInterface<void> *future);

    QFutureInterface<void> *m_future;
    QMutex *m_futureMutex;
    friend class VcsCommand;
};

class VCSBASE_EXPORT VcsCommand : public QObject
{
    Q_OBJECT

public:
    VcsCommand(const Utils::FileName &binary,
               const QString &workingDirectory,
               const QProcessEnvironment &environment);
    ~VcsCommand();

    void addJob(const QStringList &arguments, Utils::ExitCodeInterpreter *interpreter = 0);
    void addJob(const QStringList &arguments, int timeoutS,
                Utils::ExitCodeInterpreter *interpreter = 0);
    void execute();
    void abort();
    bool lastExecutionSuccess() const;
    int lastExecutionExitCode() const;

    const Utils::FileName &binaryPath() const;
    const QString &workingDirectory() const;
    const QProcessEnvironment &processEnvironment() const;

    int defaultTimeoutS() const;
    void setDefaultTimeoutS(int timeout);

    unsigned flags() const;
    void addFlags(unsigned f);

    const QVariant &cookie() const;
    void setCookie(const QVariant &cookie);

    QTextCodec *codec() const;
    void setCodec(QTextCodec *codec);

    void setProgressParser(ProgressParser *parser);
    void setProgressiveOutput(bool progressive);

    Utils::SynchronousProcessResponse runVcs(const QStringList &arguments, int timeoutS,
                                             Utils::ExitCodeInterpreter *interpreter = 0);
    // Make sure to not pass through the event loop at all:
    bool runFullySynchronous(const QStringList &arguments, int timeoutS,
                             QByteArray *outputData, QByteArray *errorData);

private:
    void run(QFutureInterface<void> &future);
    Utils::SynchronousProcessResponse runSynchronous(const QStringList &arguments, int timeoutS,
                                                     Utils::ExitCodeInterpreter *interpreter = 0);
    void emitRepositoryChanged();

public slots:
    void cancel();

signals:
    void output(const QString &);
    void errorText(const QString &);
    void finished(bool ok, int exitCode, const QVariant &cookie);
    void success(const QVariant &cookie);

private slots:
    void bufferedOutput(const QString &text);
    void bufferedError(const QString &text);
    void coreAboutToClose();

signals:
    void terminate(); // Internal

private:
    class Internal::VcsCommandPrivate *const d;
};

} // namespace VcsBase

#endif // VCSBASE_COMMAND_H