/**
 * Copyright (c) 2011, The University of Southampton and the individual contributors.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 *   *  Redistributions of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 *
 *   *  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.
 *
 *   *  Neither the name of the University of Southampton nor the names of its
 *      contributors may be used to endorse or promote products derived from this
 *      software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT OWNER 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.
 */
package org.openimaj.demos.sandbox.asm;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.List;

import org.openimaj.data.dataset.ListBackedDataset;
import org.openimaj.image.FImage;
import org.openimaj.image.ImageUtilities;
import org.openimaj.image.model.asm.datasets.ShapeModelDataset;
import org.openimaj.math.geometry.point.Point2dImpl;
import org.openimaj.math.geometry.point.PointList;
import org.openimaj.math.geometry.point.PointListConnections;
import org.openimaj.util.pair.IndependentPair;

public class AMPTSDataset extends ListBackedDataset<IndependentPair<PointList, FImage>>
                implements
                ShapeModelDataset<FImage>
{
        PointListConnections connections;

        public AMPTSDataset(String[] filenames, File ptsDir, File imgDir, File connFile) throws IOException {
                for (final String name : filenames) {
                        final FImage img = ImageUtilities.readF(new File(imgDir, name + ".jpg"));
                        final PointList pts = readAMPTSPts(new File(ptsDir, name + ".pts"));
                        data.add(new IndependentPair<PointList, FImage>(pts, img));
                }

                connections = readAMPTSConnections(connFile);
        }

        public AMPTSDataset(File ptsDir, File imgDir, File connFile) throws IOException {
                this(new String[] {
                                "107_0764", "107_0766", "107_0779", "107_0780", "107_0781", "107_0782", "107_0784",
                                "107_0785", "107_0786", "107_0787", "107_0788", "107_0789", "107_0790", "107_0791", "107_0792" },
                                ptsDir, imgDir, connFile);
        }

        private PointListConnections readAMPTSConnections(File connFile) throws IOException {
                final BufferedReader br = new BufferedReader(new FileReader(connFile));
                final PointListConnections plc = new PointListConnections();

                String line;
                while ((line = br.readLine()) != null) {
                        if (!line.trim().startsWith("indices"))
                                continue;

                        final String[] data = line.trim().replace("indices(", "").replace(")", "").split(",");
                        final boolean isOpen = (br.readLine().contains("open_boundary"));

                        int prev = Integer.parseInt(data[0]);
                        for (int i = 1; i < data.length; i++) {
                                final int next = Integer.parseInt(data[i]);
                                plc.addConnection(prev, next);
                                prev = next;
                        }

                        if (!isOpen) {
                                plc.addConnection(Integer.parseInt(data[data.length - 1]), Integer.parseInt(data[0]));
                        }
                }

                br.close();

                return plc;
        }

        private PointList readAMPTSPts(File file) throws IOException {
                final PointList pl = new PointList();
                final BufferedReader br = new BufferedReader(new FileReader(file));

                br.readLine();
                br.readLine();
                br.readLine();

                String line;
                while ((line = br.readLine()) != null) {
                        if (!line.startsWith("}") && line.trim().length() > 0) {
                                final String[] parts = line.split("\\s+");

                                final float x = Float.parseFloat(parts[0].trim());
                                final float y = Float.parseFloat(parts[1].trim());

                                pl.points.add(new Point2dImpl(x, y));
                        }
                }
                br.close();

                return pl;
        }

        @Override
        public PointListConnections getConnections() {
                return connections;
        }

        @Override
        public List<PointList> getPointLists() {
                return IndependentPair.getFirst(this);
        }

        @Override
        public List<FImage> getImages() {
                return IndependentPair.getSecond(this);
        }
}