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/**
    Copyright 2013 Gerald Boersma 

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
 */
package info.leadinglight.jdot.impl;

import java.util.ArrayList;
import java.util.EnumMap;
import java.util.List;
import java.util.Map;

/**
 * Manage options associated with a GraphElement.
 */
public class Attrs {

    public enum Key {

        Damping, K, URL, area, arrowhead, arrowsize, arrowtail, aspect, bb, bgcolor, center, charset, clusterrank, color, colorscheme, comment,
        compound, concentrate, constraint, decorate, defaultdist, dim, dimen, dir, diredgeconstraints, distortion, dpi, edgeURL, edgehref,
        edgetarget, edgetooltip, epsilon, esep, fillcolor, fixedsize, fontcolor, fontname, fontnames, fontpath, fontsize, forcelabels,
        gradientangle, group, headURL, head_lp, headclip, headhref, headlabel, headport, headtarget, headtooltip, height, href,
        id, image, imagepath, imagescale, label, labelURL, label_scheme, labelangle, labeldistance, labelfloat, labelfontcolor, labelfontname,
        labelfontsize, labelhref, labeljust, labelloc, labeltarget, labeltooltip, landscape, layer, layerlistsep, layers, layerselect,
        layersep, layout, len, levels, levelsgap, lhead, lheight, lp, ltail, lwidth, margin, maxiter, mclimit, mindist, minlen, mode, model,
        mosek, nodesep, nojustify, normalize, nslimit, nslimit1, ordering, orientation, outputorder, overlap, overlap_scaling,
        pack, packmode, pad, page, pagedir, pencolor, penwidth, peripheries, pin, pos, quadtree, quantum, rank, rankdir, ranksep,
        ratio, rects, regular, remincross, repulsiveforce, resolution, root, rotate, rotation, samehead, sametail, samplepoints,
        scale, searchsize, sep, shape, shapefile, showboxes, sides, size, skew, smoothing, sortv, splines, start, style, stylesheet,
        tailURL, tail_lp, tailclip, tailhref, taillabel, tailport, tailtarget, tailtooltip, target, tooltip, truecolor, vertices,
        viewport, voro_margin, weight, width, xlabel, xlp, z
    }

    public Attrs() {
        _attrs = new EnumMap(Key.class);
    }

    public Object get(Key key) {
        return _attrs.get(key);
    }

    public void set(Key key, Object value) {
        _attrs.put(key, value);
    }

    public boolean has() {
        return !_attrs.isEmpty();
    }

    public String getAttrString(Key key) {
        String str = "";
        Object value = get(key);
        if (value != null) {
            str = str + key.name() + "=";
            if (value instanceof String) {
                str = str + "\"" + (String) value + "\"";
            } else {
                str = str + value;
            }
        }
        return str;
    }

    public String getAsString() {
        List l = new ArrayList();
        for (Key key : _attrs.keySet()) {
            l.add(getAttrString(key));
        }
        return Util.join(l, " ");
    }

    public String toDot() {
        if (has()) {
            return "[" + getAsString() + "]";
        } else {
            return "";
        }
    }

    private final Map _attrs;
}