// **********************************************************************
// 
// <copyright>
// 
//  BBN Technologies, a Verizon Company
//  10 Moulton Street
//  Cambridge, MA 02138
//  (617) 873-8000
// 
//  Copyright (C) BBNT Solutions LLC. All rights reserved.
// 
// </copyright>
// **********************************************************************
// 
// $Source$
// $RCSfile$
// $Revision$
// $Date$
// $Author$
// 
// **********************************************************************


package com.bbn.openmap.dataAccess.shape;

import com.bbn.openmap.omGraphics.OMGraphic;
import com.bbn.openmap.omGraphics.OMGraphicList;
import com.bbn.openmap.omGraphics.OMPoly;
import com.bbn.openmap.plugin.esri.EsriPlugIn;
import com.bbn.openmap.proj.Length;
import com.bbn.openmap.proj.Projection;
import com.bbn.openmap.proj.ProjMath;
import com.bbn.openmap.util.Debug;

import java.awt.Component;
import java.net.URL;
import java.util.Iterator;
import java.util.Properties;
import javax.swing.*;

public class Thinner {

    protected float threshold = .05f;
    protected DbfTableModel dbf = null;

    public Thinner() {
        EsriGraphicList list = loadShapeFile();
        if (list != null) {
            if (Debug.debugging("thinner.describe")) {
                Debug.output(list.getDescription());
            }
            list = thinData(list);
            writeShapeFile(list);
        } else {
            Debug.output("Thinner: Shape files couldn't be found.");
        }
    }

    public EsriGraphicList loadShapeFile() {
        JFileChooser chooser = new JFileChooser();
        chooser.setDialogTitle("Choose a SHP file");
        int returnVal = chooser.showOpenDialog((Component)null);
        if (returnVal==JFileChooser.APPROVE_OPTION) {
            String newFilename = chooser.getSelectedFile().getAbsolutePath();

            EsriPlugIn epi = new EsriPlugIn();
            Properties props = new Properties();
            props.put(EsriPlugIn.PARAM_SHP, newFilename);
            epi.setProperties(props);
            dbf = epi.getModel();
            return epi.getEsriGraphicList();
        }
        return null;
    }

    public float getThreshold() {
        return threshold;
    }

    public EsriGraphicList thinData(EsriGraphicList list) {
        float threshold = getThreshold();
        for (Iterator it = list.iterator(); it.hasNext(); ) {
            EsriGraphic eg = (EsriGraphic) it.next();
            if (eg instanceof EsriGraphicList) {
                thinData((EsriGraphicList)eg);
            } else if (eg instanceof OMPoly) {
                // EsriPolygon and EsriPolyline are OMPolys
                OMPoly omp = (OMPoly)eg;
                float[] coords = omp.getLatLonArray();
                // These are in radians, make decimal degrees
                ProjMath.arrayRadToDeg(coords);
                float[] newCoords = new float[coords.length];
                int numCoords = coords.length;
                int numNewCoords = 0;
                float lastLat = -100f;
                float lastLon = -190f;
                float curLat, curLon;
                for (int i = 0; i < numCoords - 1; i+=2) {
                    curLat = coords[i];
                    curLon = coords[i+1];

                    if (Math.abs(curLat - lastLat) > threshold &&
                        Math.abs(curLon - lastLon) > threshold) {
                        
                        newCoords[numNewCoords++] = curLat;
                        newCoords[numNewCoords++] = curLon;
                        lastLat = curLat;
                        lastLon = curLon;
                    }
                }

                coords = new float[numNewCoords];
                System.arraycopy(newCoords, 0, coords, 0, numNewCoords);
                omp.setLocation(coords, OMGraphic.DECIMAL_DEGREES);
            } // else we don't care about points
        }
        return list;
    }

    public void writeShapeFile(EsriGraphicList list) {
        EsriShapeExport ese = new EsriShapeExport(list, dbf, 
                                                  (String)null);
        ese.export();
    }

    public static void main(String[] argv) {
        Debug.init();
        Thinner thinner = new Thinner();
        System.exit(0);
    }
}