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/**
 * Copyright 2010 JogAmp Community. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of
 *       conditions and the following disclaimer.
 *
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list
 *       of conditions and the following disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * The views and conclusions contained in the software and documentation are those of the
 * authors and should not be interpreted as representing official policies, either expressed
 * or implied, of JogAmp Community.
 */
package com.jogamp.graph.geom;

import java.util.ArrayList;

import jogamp.graph.geom.plane.AffineTransform;

import com.jogamp.graph.geom.Vertex;
import com.jogamp.graph.curve.OutlineShape;
import com.jogamp.graph.curve.Region;
import com.jogamp.opengl.math.FloatUtil;
import com.jogamp.opengl.math.VectorUtil;
import com.jogamp.opengl.math.geom.AABBox;



/** Define a single continuous stroke by control vertices.
 *  The vertices define the shape of the region defined by this
 *  outline. The Outline can contain a list of off-curve and on-curve
 *  vertices which define curved regions.
 *
 *  Note: An outline should be closed to be rendered as a region.
 *
 *  @see OutlineShape
 *  @see Region
 */
public class Outline implements Comparable {

    private ArrayList vertices;
    private boolean closed;
    private final AABBox bbox;
    private boolean dirtyBBox;

    /**Create an outline defined by control vertices.
     * An outline can contain off Curve vertices which define curved
     * regions in the outline.
     */
    public Outline() {
        vertices = new ArrayList(3);
        closed = false;
        bbox = new AABBox();
        dirtyBBox = false;
    }

    /**
     * Copy ctor
     */
    public Outline(final Outline src) {
        vertices = new ArrayList(src.vertices.size());
        for(int i=0; i getVertexNumber())
     */
    public final void addVertex(final int position, final Vertex vertex) throws NullPointerException, IndexOutOfBoundsException {
        if (null == vertex) {
            throw new NullPointerException("vertex is null");
        }
        vertices.add(position, vertex);
        if(!dirtyBBox) {
            bbox.resize(vertex.getCoord());
        }
    }

    /** Replaces the {@link Vertex} element at the given {@code position}.
     * Sets the bounding box dirty, hence a next call to {@link #getBounds()} will validate it.
     *
     * @param position of the replaced Vertex
     * @param vertex replacement Vertex object
     * @throws NullPointerException if the  {@link Outline} element is null
     * @throws IndexOutOfBoundsException if position is out of range (position < 0 || position >= getVertexNumber())
     */
    public final void setVertex(final int position, final Vertex vertex) throws NullPointerException, IndexOutOfBoundsException {
        if (null == vertex) {
            throw new NullPointerException("vertex is null");
        }
        vertices.set(position, vertex);
        dirtyBBox = true;
    }

    public final Vertex getVertex(final int index){
        return vertices.get(index);
    }

    public int getVertexIndex(final Vertex vertex){
        return vertices.indexOf(vertex);
    }

    /** Removes the {@link Vertex} element at the given {@code position}.
     * Sets the bounding box dirty, hence a next call to {@link #getBounds()} will validate it.
     *
     * @param position of the to be removed Vertex
     * @throws IndexOutOfBoundsException if position is out of range (position < 0 || position >= getVertexNumber())
     */
    public final Vertex removeVertex(final int position) throws IndexOutOfBoundsException {
        dirtyBBox = true;
        return vertices.remove(position);
    }

    public final boolean isEmpty(){
        return (vertices.size() == 0);
    }

    public final Vertex getLastVertex(){
        if(isEmpty()){
            return null;
        }
        return vertices.get(vertices.size()-1);
    }

    public final ArrayList getVertices() {
        return vertices;
    }

    /**
     * Use the given outline loop/strip.
     * Validates the bounding box.
     *
     * @param vertices the new outline loop/strip
     */
    public final void setVertices(final ArrayList vertices) {
        this.vertices = vertices;
        validateBoundingBox();
    }

    public final boolean isClosed() {
        return closed;
    }

    /**
     * Ensure this outline is closed.
     * 
     * Checks whether the last vertex equals to the first.
     * If not equal, it either appends a clone of the first vertex
     * or prepends a clone of the last vertex, depending on closeTail.
     * 
     * @param closeTail if true, a clone of the first vertex will be appended,
     *                  otherwise a clone of the last vertex will be prepended.
     * @return true if closing performed, otherwise false for NOP
     */
    public final boolean setClosed(final boolean closeTail) {
        this.closed = true;
        if( !isEmpty() ) {
            final Vertex first = vertices.get(0);
            final Vertex last = getLastVertex();
            if( !VectorUtil.isVec3Equal( first.getCoord(), 0, last.getCoord(), 0, FloatUtil.EPSILON ) ) {
                if( closeTail ) {
                    vertices.add(first.clone());
                } else {
                    vertices.add(0, last.clone());
                }
                return true;
            }
        }
        return false;
    }

    /**
     * Return a transformed instance with all vertices are copied and transformed.
     */
    public final Outline transform(final AffineTransform t, final Vertex.Factory vertexFactory) {
        final Outline newOutline = new Outline();
        final int vsize = vertices.size();
        for(int i=0; i=0; i--) {
            if( ! getVertex(i).equals( o.getVertex(i) ) ) {
                return false;
            }
        }
        return true;
    }
    @Override
    public final int hashCode() {
        throw new InternalError("hashCode not designed");
    }
    @Override
    public String toString() {
        // Avoid calling this.hashCode() !
        return getClass().getName() + "@" + Integer.toHexString(super.hashCode());
    }
}