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****************************************************************************/

#ifndef PHRASEVIEW_H
#define PHRASEVIEW_H

#include <QList>
#include <QShortcut>
#include <QTreeView>
#include "phrase.h"

QT_BEGIN_NAMESPACE

static const int DefaultMaxCandidates = 5;

class MultiDataModel;
class PhraseModel;

class GuessShortcut : public QShortcut
{
    Q_OBJECT
public:
    GuessShortcut(int nkey, QWidget *parent, const char *member)
        : QShortcut(parent), nrkey(nkey)
    {
        const auto key = static_cast<Qt::Key>(int(Qt::Key_1) + nrkey);
        setKey(Qt::CTRL | key);
        connect(this, SIGNAL(activated()), this, SLOT(keyActivated()));
        connect(this, SIGNAL(activated(int)), parent, member);
    }

private slots:
    void keyActivated() { emit activated(nrkey); }

signals:
    void activated(int nkey);

private:
    int nrkey;
};

class PhraseView : public QTreeView
{
    Q_OBJECT

public:
    PhraseView(MultiDataModel *model, QList<QHash<QString, QList<Phrase *> > > *phraseDict, QWidget *parent = 0);
    ~PhraseView();
    void setSourceText(int model, const QString &sourceText);

public slots:
    void toggleGuessing();
    void update();
    int getMaxCandidates() const { return m_maxCandidates; }
    void setMaxCandidates(const int max);
    static int getDefaultMaxCandidates() { return DefaultMaxCandidates; }

signals:
    void phraseSelected(int latestModel, const QString &phrase);
    void showFewerGuessesAvailable(bool canShow);
    void setCurrentMessageFromGuess(int modelIndex, const Candidate &cand);

protected:
    // QObject
    virtual void contextMenuEvent(QContextMenuEvent *event);
    // QAbstractItemView
    virtual void mouseDoubleClickEvent(QMouseEvent *event);

private slots:
    void guessShortcut(int nkey);
    void selectPhrase(const QModelIndex &index);
    void selectPhrase();
    void editPhrase();
    void gotoMessageFromGuess();
    void moreGuesses();
    void fewerGuesses();
    void resetNumGuesses();

private:
    QList<Phrase *> getPhrases(int model, const QString &sourceText);
    void deleteGuesses();

    MultiDataModel *m_dataModel;
    QList<QHash<QString, QList<Phrase *> > > *m_phraseDict;
    QList<Phrase *> m_guesses;
    PhraseModel *m_phraseModel;
    QString m_sourceText;
    int m_modelIndex;
    bool m_doGuesses;
    int m_maxCandidates = DefaultMaxCandidates;
};

QT_END_NAMESPACE

#endif // PHRASEVIEW_H