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/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 * 

 * 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 2

 * 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, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 

 * MA  02110-1301, USA.

 * 

 */

package org.gvsig.symbology.fmap.mapcontext.rendering.symbol.line.impl;

import java.awt.Color;

import java.awt.Graphics2D;

import java.awt.Rectangle;

import java.awt.geom.AffineTransform;

import java.awt.geom.PathIterator;

import java.awt.geom.Point2D;

import java.util.ArrayList;

import java.util.List;

import org.gvsig.compat.print.PrintAttributes;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.geom.Geometry.SUBTYPES;

import org.gvsig.fmap.geom.primitive.GeneralPathX;

import org.gvsig.fmap.mapcontext.MapContextLocator;

import org.gvsig.fmap.mapcontext.ViewPort;

import org.gvsig.fmap.mapcontext.rendering.symbols.SymbolDrawingException;

import org.gvsig.symbology.fmap.mapcontext.rendering.symbol.impl.AbstractSymbol;

import org.gvsig.symbology.fmap.mapcontext.rendering.symbol.impl.CartographicSupportToolkit;

import org.gvsig.symbology.fmap.mapcontext.rendering.symbol.line.ILineSymbol;

import org.gvsig.symbology.fmap.mapcontext.rendering.symbol.style.ILineStyle;

import org.gvsig.symbology.fmap.mapcontext.rendering.symbol.style.SimpleLineStyle;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dynobject.DynClass;

import org.gvsig.tools.persistence.PersistenceException;

import org.gvsig.tools.persistence.PersistentState;

/**

 * AbstractLineSymbol is the class that implements the interface for line symbols.

 * It is considered as the father of all the XXXLineSymbols and will implement all the

 * methods that these classes had not developed (and correspond with one of the methods

 * of AbstractLineSymbol class).

 *

 *

 * @author 2005-2009 jaume dominguez faus - jaume.dominguez@iver.es

 * @author 2009-     <a href="cordinyana@gvsig.org">C?sar Ordi?ana</a> - gvSIG team

 */

public abstract class AbstractLineSymbol extends AbstractSymbol implements ILineSymbol {

    private static final String FIELD_LINESTYLE = "lineStyle";

    private static final String FIELD_COLOR = "color";

    public static final String LINE_SYMBOL_DYNCLASS_NAME = "LineSymbol";

        private static final GeometryManager geomManager = GeometryLocator.getGeometryManager();

        private Color color;

        private ILineStyle lineStyle = new SimpleLineStyle();

        public AbstractLineSymbol() {

                super();

                color =

                                MapContextLocator.getSymbolManager()

                                                .getSymbolPreferences()

                                                .getDefaultSymbolColor();

        }

        public Color getColor() {

                return color;

        }

        public void setLineColor(Color color) {

                this.color = color;

        }

        public void setColor(Color color) {

                setLineColor(color);

        }

        public int getOnePointRgb() {

                return color.getRGB();

        }

        public final int getSymbolType() {

                return Geometry.TYPES.CURVE;

        }

        public void getPixExtentPlus(Geometry geom, float[] distances, ViewPort viewPort, int dpi) {

                float cs = (float) getCartographicSize(viewPort, dpi, geom);

                // TODO and add the line offset

                distances[0] = cs;

                distances[1] = cs;

        }

        public boolean isSuitableFor(Geometry geom) {

                switch(geom.getType()) {

                // pasted from FSymbol

                case Geometry.TYPES.CURVE:

                case Geometry.TYPES.ARC:

                        return true;

                }

                return false;

        }

        public ILineStyle getLineStyle() {

                return lineStyle;

        }

        public void setLineStyle(ILineStyle lineStyle) {

                this.lineStyle = lineStyle;

        }

        public int getAlpha() {

                return color.getAlpha();

        }

        public void setAlpha(int outlineAlpha) {

                color = new Color(color.getRed(), color.getGreen(), color.getBlue(), outlineAlpha);

        }

        public void drawInsideRectangle(Graphics2D g, AffineTransform scaleInstance, Rectangle r, PrintAttributes properties) throws SymbolDrawingException {

                final int hGap = (int) (r.getWidth() * 0.1); // the left and right margins

                final int vPos = 1;                                                  // the top and bottom margins

                final int splitCount = 3;                                          // number of lines

                final int splitHSize = (r.width - hGap - hGap) / splitCount;

                int hPos = hGap;

                boolean swap = false;

                GeneralPathX gpx = new GeneralPathX();

                gpx.moveTo(r.x + hPos, r.y + r.height-vPos);

                for (int i = 0; i < splitCount; i++) {

                        swap = !swap;

                        gpx.lineTo(r.x + hPos + splitHSize, (swap ? vPos : r.height-vPos) + r.y);

                        hPos += splitHSize;

                }

                try {

                        if (properties==null)

                                draw(g, new AffineTransform(), geomManager.createSurface(gpx, SUBTYPES.GEOM2D), null, null);

                        else

                                print(g, new AffineTransform(), geomManager.createSurface(gpx, SUBTYPES.GEOM2D), properties);

                } catch (Exception e) {

                        throw new SymbolDrawingException(SymbolDrawingException.UNSUPPORTED_SET_OF_SETTINGS);

                }

        }

        public void setCartographicSize(double cartographicSize, Geometry geom) {

                getLineStyle().setLineWidth((float) cartographicSize);

        }

        public double toCartographicSize(ViewPort viewPort, double dpi, Geometry geom) {

                double oldSize = getLineWidth();

                setCartographicSize(getCartographicSize(

                                                                viewPort,

                                                                dpi,

                                                                geom),

                                                        geom);

                return oldSize;

        }

        public double getCartographicSize(ViewPort viewPort, double dpi, Geometry geom) {

                return CartographicSupportToolkit.

                                        getCartographicLength(this,

                                                                                  getLineWidth(),

                                                                                  viewPort,

                                                                                  dpi);

        }

        public static Geometry offsetFShape(Geometry shp, double offset) {

                Geometry offsetFShape = null;

                if (shp != null) {

                        if (offset == 0)

                                return shp;

                        List<Point2D[]> segments = new ArrayList<Point2D[]>();

                        GeneralPathX gpx = new GeneralPathX(shp.getPathIterator(null));

                        PathIterator it = gpx.getPathIterator(null);

                        double[] data = new double[6];

                        Point2D segmentIni = null;

                        Point2D segmentEnd = null;

                        while (!it.isDone()) {

                                switch (it.currentSegment(data)) {

                                case PathIterator.SEG_MOVETO:

                                        segmentEnd = new Point2D.Double(

                                                        data[0], data[1]);

                                        break;

                                case PathIterator.SEG_LINETO:

                                        segmentEnd = segmentIni;

                                        segmentIni = new Point2D.Double(

                                                        data[0], data[1]);

                                        segments.add(getParallel(segmentIni, segmentEnd, offset));

                                        break;

                                case PathIterator.SEG_QUADTO:

                                        break;

                                case PathIterator.SEG_CUBICTO:

                                        break;

                                case PathIterator.SEG_CLOSE:

                                        break;

                                }

                        }

                }

                return offsetFShape;

        }

        private static Point2D[] getParallel(Point2D p1, Point2D p2, double distance) {

                Point2D[] pParallel=new Point2D[2];

                pParallel[0]=getPerpendicularPoint(p1,p2,p1,distance);

                pParallel[1]=getPerpendicularPoint(p1,p2,p2,distance);

                return pParallel;

        }

        /**

         * Obtiene el punto que se encuentra a una distancia 'dist' de la recta

         * p1-p2 y se encuentra en la recta perpendicular que pasa por perpPoint

         *

         * @param p1 Punto de la recta p1-p2

         * @param p2 Punto de la recta p1-p2

         * @param perpPoint Punto de la recta perpendicular

         * @param dist Distancia del punto que se quiere obtener a la recta p1-p2

         *

         * @return DOCUMENT ME!

         */

        private static Point2D getPerpendicularPoint(Point2D p1, Point2D p2,

                Point2D perpPoint, double dist) {

                Point2D[] p = getPerpendicular(p1, p2, perpPoint);

                Point2D unit = getUnitVector(p[0], p[1]);

                return new Point2D.Double(perpPoint.getX() + (unit.getX() * dist),

                        perpPoint.getY() + (unit.getY() * dist));

        }

        /**

         * Obtiene un par de puntos que definen la recta perpendicular a p1-p2 que

         * pasa por el punto perp

         *

         * @param p1 punto de la recta p1-p2

         * @param p2 punto de la recta p1-p2

         * @param perp Punto por el que pasa la recta perpendicular, debe ser

         *                   distinto a p2

         *

         * @return Array con dos puntos que definen la recta resultante

         */

        private static Point2D[] getPerpendicular(Point2D p1, Point2D p2,

                Point2D perp) {

                if ((p2.getY() - p1.getY()) == 0) {

                        return new Point2D[] {

                                new Point2D.Double(perp.getX(), 0),

                                new Point2D.Double(perp.getX(), 1)

                        };

                }

                //Pendiente de la recta perpendicular

                double m = (p1.getX() - p2.getX()) / (p2.getY() - p1.getY());

                //b de la funcion de la recta perpendicular

                double b = perp.getY() - (m * perp.getX());

                //Obtenemos un par de puntos

                Point2D[] res = new Point2D[2];

                res[0] = new Point2D.Double(0, (m * 0) + b);

                res[1] = new Point2D.Double(1000, (m * 1000) + b);

                return res;

        }

        /**

         * Devuelve un vector unitario en forma de punto a partir de dos puntos.

         *

         * @param p1 punto origen.

         * @param p2 punto destino.

         *

         * @return vector unitario.

         */

        private static Point2D getUnitVector(Point2D p1, Point2D p2) {

                Point2D paux = new Point2D.Double(p2.getX() - p1.getX(),

                                p2.getY() - p1.getY());

                double v = Math.sqrt(Math.pow(paux.getX(), 2d) +

                                Math.pow(paux.getY(), 2d));

                paux = new Point2D.Double(paux.getX() / v, paux.getY() / v);

                return paux;

        }

        public void print(Graphics2D g, AffineTransform at, Geometry geom, PrintAttributes properties) {

                double originalSize = getLineWidth();

                double size=originalSize;

                // scale it to size

                int pq = properties.getPrintQuality();

                if (pq == PrintAttributes.PRINT_QUALITY_NORMAL){

                        size *= (double) 300/72;

                }else if (pq == PrintAttributes.PRINT_QUALITY_HIGH){

                        size *= (double) 600/72;

                }else if (pq == PrintAttributes.PRINT_QUALITY_DRAFT){

                        // size *= 72/72; // (which is the same than doing nothing)

                }

                setLineWidth(size);

                draw(g,at,geom,null, null);

                setLineWidth(originalSize);

        }

        public Object clone() throws CloneNotSupportedException {

                AbstractLineSymbol copy = (AbstractLineSymbol) super.clone();

                // Clone the line style

                if (lineStyle != null) {

                        copy.lineStyle = (ILineStyle) lineStyle.clone();

                }

                return copy;

        }

        public void loadFromState(PersistentState state)

                        throws PersistenceException {

                // Set parent symbol properties

                super.loadFromState(state);

                // Set own properties

                setColor((Color) state.get(FIELD_COLOR));

                setLineStyle((ILineStyle) state.get(FIELD_LINESTYLE));

        }

        public void saveToState(PersistentState state) throws PersistenceException {

                // Save parent symbol properties

                super.saveToState(state);

                // Save own properties

                state.set(FIELD_COLOR, getColor());

                state.set(FIELD_LINESTYLE, getLineStyle());

        }

        public static void registerPersistence() {

                // Add the AbstractLineSymbol DynClass definition.

                DynClass dynClass = ToolsLocator.getDynObjectManager().add(

                                LINE_SYMBOL_DYNCLASS_NAME);

                // Extend the Symbol base definition

                dynClass.extend(SYMBOL_DYNCLASS_NAME);

                // Color

                dynClass.addDynFieldObject(FIELD_COLOR).setMandatory(true);

                // LineStyle

                dynClass.addDynFieldObject(FIELD_LINESTYLE).setMandatory(true);

        }

}