/** Copyright (C) 2017 by Bundesanstalt für Gewässerkunde
 * Software engineering by
 *  Björnsen Beratende Ingenieure GmbH
 *  Dr. Schumacher Ingenieurbüro für Wasser und Umwelt
 *
 * This file is Free Software under the GNU AGPL (>=v3)
 * and comes with ABSOLUTELY NO WARRANTY! Check out the
 * documentation coming with Dive4Elements River for details.
 */
package org.dive4elements.river.artifacts.uinfo.vegetationzones;

import java.util.ArrayList;
import java.util.List;
import java.util.TreeSet;

/**
 * @author Domenico Nardi Tironi
 *
 */
public class VegetationZone implements Comparable<VegetationZone> {

    // IMMER ABGLEICHEN MIT VegetationZone.class Server und Client
    public static final boolean HAS_COLORS_EDITABLE = false;

    private static final String TABLE_CELL_SEPARATOR = "TABLE_CELL_SEPARATOR";
    private static final String TABLE_ROW_SEPARATOR = "TABLE_ROW_SEPARATOR";
    private final String zoneName;
    private final int min_day_overflow;
    private final int max_day_overflow;
    private final String hexColor;

    public static List<VegetationZone> parse(final String zonesRaw) {
        final List<VegetationZone> resultList = new ArrayList<>();

        final List<String[]> results = new ArrayList<>();
        if (zonesRaw.contains(TABLE_ROW_SEPARATOR)) {
            final String[] rows = zonesRaw.split(TABLE_ROW_SEPARATOR);
            for (final String row : rows) {
                if (row.contains(TABLE_CELL_SEPARATOR)) {
                    final String[] result = row.split(TABLE_CELL_SEPARATOR);
                    results.add(result);
                }
            }
        }
        for (final String[] zone : results) {

            final VegetationZone helper = new VegetationZone(zone[0], Integer.valueOf(zone[1]), Integer.valueOf(zone[2]), zone[3]);
            resultList.add(helper);
        }

        return resultList;
    }

    public static VegetationZone createFromTableEntry(final String zone, final String min_day_overflow, final String max_day_overflow, final String hexColor) {
        return new VegetationZone(zone, Integer.valueOf(min_day_overflow), Integer.valueOf(max_day_overflow), hexColor); // Error-Handling?
    }

    private VegetationZone(final String zone, final Integer min_day_overflow, final Integer max_day_overflow, final String hexColor) {
        this.zoneName = zone;
        this.min_day_overflow = min_day_overflow;
        this.max_day_overflow = max_day_overflow;
        this.hexColor = hexColor;
    }

    public int getMax_day_overflow() {
        return this.max_day_overflow;
    }

    public String getZoneName() {
        if (this.zoneName == null || this.zoneName.equals("")) {
            return "---";
        }
        return this.zoneName;
    }

    public String getHexColor() {
        try {
            final int test = Integer.decode(this.hexColor);
            return this.hexColor;
        }
        catch (final NumberFormatException e) {
            return "#ffffff";
        }
    }

    public int getMin_day_overflow() {
        return this.min_day_overflow;
    }

    public static final List<VegetationZone> getStandardList() {

        final List<VegetationZone> list = new ArrayList<>();
        list.add(new VegetationZone("Zonaler Wald", 0, 5, "#336600"));
        list.add(new VegetationZone("Hartholzaue, trocken", 6, 40, "#00cc00"));
        list.add(new VegetationZone("Hartholzaue, feucht", 41, 80, "#66ff33"));
        list.add(new VegetationZone("Silberweidenwald", 81, 140, "#008080"));
        list.add(new VegetationZone("Weidengebüsch", 141, 200, "#33cccc"));
        list.add(new VegetationZone("Uferröhricht", 201, 260, "#ffa8ff"));
        list.add(new VegetationZone("Uferpioniere", 261, 320, "#ff0000"));
        list.add(new VegetationZone("Vegetationslos", 321, 364, "#b2b2b2"));
        list.add(new VegetationZone("Wasserfläche", 365, 365, "#0066ff"));

        return list;
    }

    public static final String parseListToDataString(final List<VegetationZone> list) {

        java.util.Collections.sort(list);
        final StringBuilder builder = new StringBuilder();
        for (final VegetationZone zone : list) {
            builder.append(zone.getZoneName());
            builder.append(TABLE_CELL_SEPARATOR);
            builder.append(zone.getMin_day_overflow());
            builder.append(TABLE_CELL_SEPARATOR);
            builder.append(zone.getMax_day_overflow());
            builder.append(TABLE_CELL_SEPARATOR);
            builder.append(zone.getHexColor());
            builder.append(TABLE_ROW_SEPARATOR);
        }
        return builder.toString();

    }

    @Override
    public int compareTo(final VegetationZone o) {
        final int basicCompare = Integer.valueOf(this.getMin_day_overflow()).compareTo(o.getMin_day_overflow());
        if (basicCompare == 0)
            return Integer.valueOf(this.getMax_day_overflow()).compareTo(o.getMax_day_overflow()); // wenn min==min && max==max, alphabetisch sortieren?

        if (basicCompare == 0) {
            return 1; // for treeSet
        }

        return basicCompare;
    }

    public static final boolean zonesAreOverlapping(final List<VegetationZone> list) {
        for (final VegetationZone zone : list) {
            for (final VegetationZone zoneOther : list) {
                if (zone != zoneOther) {
                    final boolean overlaps = zone.overlaps(zoneOther);
                    if (overlaps) {
                        return overlaps; // cancel. only one zone has to overlap
                    }
                }
            }
        }

        return false;
    }

    public static final boolean hasGaps(final List<VegetationZone> list, final int lower, final int upper) {

        if ((upper - lower) == 0)
            return true;

        final TreeSet<VegetationZone> treeList = new TreeSet<>();
        treeList.addAll(list);
        int lowerCompare = lower;
        for (final VegetationZone zone : treeList) {
            if (zone.getLowerFromTo() > (lowerCompare + 1)) { // nicht inklusiv
                return true;
            }
            lowerCompare = zone.getUpperFromTo();
        }
        if ((lowerCompare) < upper)
            return true; // am Ende nicht geschlossen

        return false;
    }

    private boolean overlaps(final VegetationZone otherZone) {
        final int otherLower = otherZone.getLowerFromTo();
        final int otherUpper = otherZone.getUpperFromTo();

        final int upper = getUpperFromTo();
        final int lower = getLowerFromTo();
        final int otherSchwerpunkt = (otherLower + otherUpper) / 2;
        if ((otherUpper <= upper && otherUpper >= lower)) {
            return true;
        } else if (otherLower >= lower && otherLower <= upper) {
            return true;
        } else if (otherSchwerpunkt >= (lower) && otherSchwerpunkt <= (upper)) {
            return true;
        }
        return false;
    }

    public Integer getLowerFromTo() {
        return this.min_day_overflow < this.max_day_overflow ? this.min_day_overflow : this.max_day_overflow; // Math. is forbidden :-(
    }

    public Integer getUpperFromTo() {
        return this.min_day_overflow > this.max_day_overflow ? this.min_day_overflow : this.max_day_overflow;// Math. is forbidden :-(
    }

}