package org.activityinfo.legacy.shared.reports.model.layers;

/*
 * #%L
 * ActivityInfo Server
 * %%
 * Copyright (C) 2009 - 2013 UNICEF
 * %%
 * 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 3 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, see
 * <http://www.gnu.org/licenses/gpl-3.0.html>.
 * #L%
 */

import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlElementWrapper;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

/*
 * Displays multiple indicators using a piechart to visualize relative proportions
 */
public class PiechartMapLayer extends CircledMapLayer {
    private List<Slice> slices = new ArrayList<Slice>();
    private static List<String> colors = new ArrayList<String>();

    public PiechartMapLayer() {
    }

    // See also: http://cloford.com/resources/colours/500col.htm
    static {
        colors.add("4169E1"); // royal blue
        colors.add("EEEE00"); // yellow 2
        colors.add("EE0000"); // red 2
        colors.add("00EE00"); // green 2
        colors.add("912CEE"); // purple
        colors.add("7EC0EE"); // skyblue 2
        colors.add("EE9A00"); // orange 2
        colors.add("800000"); // maroon
        colors.add("B4EEB4"); // darkseagreen 2
    }

    @Override
    public boolean supportsMultipleIndicators() {
        return true;
    }

    @Override
    public List<Integer> getIndicatorIds() {
        List<Integer> result = new ArrayList<Integer>();

        for (Slice slice : slices) {
            result.add(slice.getIndicatorId());
        }

        return result;
    }

    @XmlElement(name = "slice") @XmlElementWrapper(name = "slices")
    public List<Slice> getSlices() {
        return slices;
    }

    @Override
    public String getTypeName() {
        return "Piechart";
    }

    @Override
    public void addIndicatorId(int id) {
        slices.add(new Slice(getNextColor(), id));
    }

    /*
     * Returns next color for a slice
     */
    private String getNextColor() {
        // Use a modulo to prevent OutOfRangeException for indicator-happy users
        return colors.get(slices.size() % colors.size());
    }

    @Override
    public String toString() {
        return "PiechartMapLayer [slices=" + slices + "]";
    }

    public static class Slice implements Serializable {
        private String color;
        private int indicatorId;

        public Slice() {
        }

        public Slice(String color, int indicatorId) {
            super();
            this.color = color;
            this.indicatorId = indicatorId;
        }

        public String getColor() {
            return color;
        }

        public void setColor(String color) {
            this.color = color;
        }

        public int getIndicatorId() {
            return indicatorId;
        }

        public void setIndicatorId(int indicatorId) {
            this.indicatorId = indicatorId;
        }

        @Override
        public String toString() {
            return "Slice [color=" + color + ", indicatorId=" + indicatorId + "]";
        }

    }
}