package grafikchat.view;

import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.RenderingHints;
import java.awt.geom.Line2D;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import java.util.List;
import java.util.logging.Logger;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.standard.DialogTypeSelection;
import javax.swing.JComponent;
import javax.swing.JOptionPane;
import grafikchat.model.Figure;
import grafikchat.model.ChatModel;
import grafikchat.model.Figures;
import grafikchat.ohmlogger.OhmLogger;

/**
 * View of zeichenprogramm
 * 
 * @author marian
 */
public class GrafikView extends JComponent implements Printable
{
    private final static Logger lg = OhmLogger.getLogger();
    private Line2D.Double line;
    private ChatModel model;
    private final static Color colorInternal = Color.BLACK;
    private final static Color colorExternal = Color.RED;

    /**
     * Constructor, initialize UI
     */
    public GrafikView()
    {
        this.model = null;
        this.setBackground(Color.WHITE);
        line = new Line2D.Double();
        
        lg.info("Call constructor of grafikview");
    }

    /**
     * Set model
     * @param model model of MVC 
     */
    public void setModel(ChatModel model)
    {
        this.model = model;
        lg.info("Set model of grafik view");
    }

    /**
     * Draw point (line with the point before)
     * @param mode True to draw internal point, false to draw external point
     */
    public void drawPoint(boolean mode)
    {
        if (this.model == null) {
            lg.warning("Model not initialized");
            return;
        }
        
        Graphics2D g2 = (Graphics2D) this.getGraphics();    
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        
        if (mode) {
            drawLine(model.getIntern(), colorInternal, g2);
        } else {
            drawLine(model.getExtern(), colorExternal, g2);
        }
        g2.dispose();
    }
    
    /**
     * Draw new line between two points
     * @param f Figures with points
     * @param c Color of line
     * @param g2 Graphics context
     */
    private void drawLine(Figures f, Color c, Graphics2D g2)
    {
        List<Point> points;
       
        try {
            points = f.getLastTwoPoints();
        } catch (Exception e) {
            return;
        }
        
        line.setLine(points.get(0), points.get(1));
        
        g2.setPaint(c);
        g2.setStroke(new BasicStroke(3));
        g2.draw(line);
    }

    /**
     * Repaint view
     * @param g Something special
     */
    @Override
    public void paintComponent(Graphics g)
    {
        super.paintComponent(g);
        
        if (model == null) {
            lg.warning("Model not initialized");
            return;
        }
        
        Graphics2D g2 = (Graphics2D) g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        
        redrawFigures(model.getIntern(), colorInternal, g2);
        redrawFigures(model.getExtern(), colorExternal, g2);
    }

    /**
     * Redraw figure
     * @param figures Figure to redraw
     * @param g2 Graphics context
     */
    private void redrawFigures(Figures figures, Color c, Graphics2D g2)
    {
        for (Figure f : figures.getFigures()) {
            List<Point> points = f.getPoints();
            for (int i=1; i<points.size(); i++) {
                line.setLine(points.get(i-1), points.get(i));
                g2.setPaint(c);
                g2.setStroke(new BasicStroke(3));
                g2.draw(line);
            }
        }
    }
    
    /**
     * Try to print current graphics
     */
    public void doPrint()
    {
        HashPrintRequestAttributeSet printSet = new HashPrintRequestAttributeSet();
        printSet.add(DialogTypeSelection.NATIVE);
        PrinterJob pj = PrinterJob.getPrinterJob();
        pj.setPrintable(this);
        // Druckdialog
        if (pj.printDialog(printSet)) {
            try {
                pj.print(printSet);
            } catch (Exception ex) {
                JOptionPane.showMessageDialog(this, ex.toString());
            }
        }
    }

    /**
     * Perform print of graphics
     * @param gp Current graphics
     * @param pf format of page
     * @param pageIndex index of page
     * @return result if successful
     * @throws PrinterException if something went wrong
     */
    @Override
    public int print(Graphics gp, PageFormat pf, int pageIndex) throws PrinterException
    {
        Graphics2D g2p = (Graphics2D) gp;
        if (pageIndex == 0) {
            g2p.translate(pf.getImageableX(), pf.getImageableY());
            g2p.scale(pf.getImageableWidth()/pf.getWidth(), pf.getImageableHeight() / pf.getHeight());
            super.print(g2p);
            return Printable.PAGE_EXISTS;
        } else {
            return Printable.NO_SUCH_PAGE;
        }
    }
}