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/********************************************************************************************
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**    iLand - an individual based forest landscape and disturbance model
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**    http://iland.boku.ac.at
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**    Copyright (C) 2009-  Werner Rammer, Rupert Seidl
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**
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**    This program is free software: you can redistribute it and/or modify
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**    it under the terms of the GNU General Public License as published by
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**    the Free Software Foundation, either version 3 of the License, or
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**    (at your option) any later version.
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**
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**    This program is distributed in the hope that it will be useful,
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**    but WITHOUT ANY WARRANTY; without even the implied warranty of
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**    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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**    GNU General Public License for more details.
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**
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**    You should have received a copy of the GNU General Public License
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**    along with this program.  If not, see <http://www.gnu.org/licenses/>.
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********************************************************************************************/
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#ifndef MODELCONTROLLER_H
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#define MODELCONTROLLER_H
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#include <QObject>
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#include <QHash>
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#include "grid.h"
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#include "layeredgrid.h"
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class Model;
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class MainWindow;
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class MapGrid;
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class ModelController: public QObject
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{
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    Q_OBJECT
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public:
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    ModelController();
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    ~ModelController();
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    void setMainWindow(MainWindow *mw) { mViewerWindow = mw; }
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    void connectSignals(); // connect signal/slots to the main window if available
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    Model *model() const { return mModel; }
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    // bool checkers...
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    bool canCreate(); ///< return true if the model can be created (settings loaded and model does not exist)
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    bool canDestroy(); ///< model may be destroyed
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    bool canRun(); ///< model may be run
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    bool isRunning(); ///< model is running
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    bool isFinished(); ///< returns true if there is a valid model state, but the run is finished
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    // simulation length
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    int currentYear() const; ///< return current year of the model
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    int totalYears() const { return mYearsToRun; } ///< returns total number of years to simulate
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    // error handling
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    void throwError(const QString msg);
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    // dynamic outputs (variable fields)
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    void setupDynamicOutput(QString fieldList);
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    QString dynamicOutput();
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    // some informational services
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    QHash<QString, QString> availableSpecies();
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    void saveScreenshot(QString file_name); ///< saves a screenshot of the central view widget to 'file_name'
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    void addGrid(const FloatGrid *grid, const QString &name, const GridViewType view_type, double min_value, double max_value);
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    void paintMap(MapGrid *map, double min_value, double max_value);
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    void addLayers(const LayeredGridBase *layers, const QString &name);
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    void setViewport(QPointF center_point, double scale_px_per_m);
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signals:
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    void finished(QString errorMessage);
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    void year(int year);
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    void bufferLogs(bool do_buffer);
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public slots:
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    void setFileName(QString initFileName); ///< set project file name
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    void create(); ///< create the model
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    void destroy(); ///< delete the model
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    void run(int years); ///< run the model
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    bool runYear(); ///< runs a single time step
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    bool pause(); ///< pause execution, and if paused, continue to run. returns state *after* change, i.e. true=now in paused mode
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    void cancel(); ///< cancel execution of the model
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    void repaint(); ///< force a repaint of the main drawing window
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private slots:
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    void runloop();
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private:
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    void fetchDynamicOutput();
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    MainWindow *mViewerWindow;
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    Model *mModel;
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    bool mPaused;
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    bool mRunning;
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    bool mFinished;
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    bool mCanceled;
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    int mYearsToRun;
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    QString mInitFile;
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    QStringList mDynFieldList;
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    QStringList mDynData;
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};
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#endif // MODELCONTROLLER_H