package de.tu_darmstadt.informatik.tk.scopviz.io;

import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;

import org.graphstream.graph.Graph;
import org.graphstream.stream.file.FileSinkGraphML;

import de.tu_darmstadt.informatik.tk.scopviz.debug.Debug;
import de.tu_darmstadt.informatik.tk.scopviz.graphs.MyEdge;
import de.tu_darmstadt.informatik.tk.scopviz.graphs.MyGraph;
import de.tu_darmstadt.informatik.tk.scopviz.graphs.MyNode;

public class MyFileSinkGraphML extends FileSinkGraphML {
	public boolean isWritingMultigraph = false;

	private void print(String format, Object... args) throws IOException {
		output.write(String.format(format, args));
	}

	@Override
	protected void exportGraph(Graph g) {
		try {
			int attribute = 0;
			HashMap<String, String> nodeAttributes = new HashMap<String, String>();
			HashMap<String, String> edgeAttributes = new HashMap<String, String>();
			HashMap<String, String> graphAttributes = new HashMap<String, String>();
			for (String j : g.getAttributeKeySet()) {
				if (!isWritingMultigraph && (j.equals("layer") || j.equals("ui.stylesheet"))) {
					continue;
				}
				if (!graphAttributes.containsKey(j)) {
					Object gValue = g.getAttribute(j);
					String gType;

					if (gValue == null)
						continue;

					String gId = String.format("attr%04X", attribute++);

					if (gValue instanceof Boolean)
						gType = "boolean";
					else if (gValue instanceof Long)
						gType = "long";
					else if (gValue instanceof Integer)
						gType = "int";
					else if (gValue instanceof Double)
						gType = "double";
					else if (gValue instanceof Float)
						gType = "float";
					else
						gType = "string";

					graphAttributes.put(j, gId);

					print("\t<key id=\"%s\" for=\"graph\" attr.name=\"%s\" attr.type=\"%s\"/>\n", gId,
							escapeXmlString(j), gType);
				}
			}

			for (MyNode n : g.<MyNode>getEachNode()) {
				for (String k : n.getAttributeKeySet()) {
					// AttributeFiltering
					if (k.equals("ui.j2dsk") || k.equals("ui.class") || k.equals("ui.pie-values") || k.equalsIgnoreCase("originalgraph")) {
						continue;
					}
					Class<? extends Object> c = n.getAttribute(k).getClass();
					if (!c.isPrimitive() && !(c == String.class) && !(c == Character.class) && !(c == Boolean.class)
							&& !(c == Integer.class) && !(c == Long.class) && !(c == Short.class) && !(c == Byte.class)
							&& !(c == Float.class) && !(c == Double.class)) {
						Debug.out("Could not parse an Attribute because it is not Primitive or a String \n\t"
								+ "(Attribute: " + k + ", Value: " + n.getAttribute(k) + ", from Node: " + n
								+ ", Type: " + c + ") ", 2);
						continue;
					}

					if (!nodeAttributes.containsKey(k)) {
						Object value = n.getAttribute(k);
						String type;

						if (value == null)
							continue;

						String id = String.format("attr%04X", attribute++);

						if (value instanceof Boolean)
							type = "boolean";
						else if (value instanceof Long)
							type = "long";
						else if (value instanceof Integer)
							type = "int";
						else if (value instanceof Double)
							type = "double";
						else if (value instanceof Float)
							type = "float";
						else
							type = "string";

						nodeAttributes.put(k, id);

						print("\t<key id=\"%s\" for=\"node\" attr.name=\"%s\" attr.type=\"%s\"/>\n", id,
								escapeXmlString(k), type);
					}
				}
			}

			for (MyEdge n : g.<MyEdge>getEachEdge()) {
				for (String k : n.getAttributeKeySet()) {
					// AttributeFiltering
					if (k.equals("ui.j2dsk")) {
						continue;
					}
					Class<? extends Object> c = n.getAttribute(k).getClass();
					if (!c.isPrimitive() && !(c == String.class) && !(c == Character.class) && !(c == Boolean.class)
							&& !(c == Integer.class) && !(c == Long.class) && !(c == Short.class) && !(c == Byte.class)
							&& !(c == Float.class) && !(c == Double.class)) {
						Debug.out("Could not parse an Attribute because it is not Primitive or a String \n\t"
								+ "(Attribute: " + k + ", Value: " + n.getAttribute(k) + ", from Edge: " + n
								+ ", Type: " + c + ") ", 2);
						continue;
					}

					if (!edgeAttributes.containsKey(k)) {
						Object value = n.getAttribute(k);
						String type;

						if (value == null)
							continue;

						String id = String.format("attr%04X", attribute++);

						if (value instanceof Boolean)
							type = "boolean";
						else if (value instanceof Long)
							type = "long";
						else if (value instanceof Integer)
							type = "int";
						else if (value instanceof Double)
							type = "double";
						else if (value instanceof Float)
							type = "float";
						else
							type = "string";

						edgeAttributes.put(k, id);
						print("\t<key id=\"%s\" for=\"edge\" attr.name=\"%s\" attr.type=\"%s\"/>\n", id,
								escapeXmlString(k), type);
					}
				}
			}

			print("\t<graph id=\"%s\" edgedefault=\"undirected\">\n", escapeXmlString(g.getId()));
			for (String k : g.getAttributeKeySet()) {
				if (!isWritingMultigraph && (k.equals("layer") || k.equals("ui.stylesheet"))) {
					continue;
				}
				print("\t\t\t<data key=\"%s\">%s</data>\n", graphAttributes.get(k),
						escapeXmlString(g.getAttribute(k).toString()));
			}

			for (MyNode n : g.<MyNode>getEachNode()) {
				print("\t\t<node id=\"%s\">\n", n.getId());
				for (String k : n.getAttributeKeySet()) {
					if (k.equals("ui.j2dsk") || k.equals("ui.class") || k.equals("ui.pie-values") || k.equalsIgnoreCase("originalgraph")) {
						continue;
					}
					Class<? extends Object> c = n.getAttribute(k).getClass();
					if (!c.isPrimitive() && !(c == String.class) && !(c == Character.class) && !(c == Boolean.class)
							&& !(c == Integer.class) && !(c == Long.class) && !(c == Short.class) && !(c == Byte.class)
							&& !(c == Float.class) && !(c == Double.class)) {
						continue;
					}

					print("\t\t\t<data key=\"%s\">%s</data>\n", nodeAttributes.get(k),
							escapeXmlString(n.getAttribute(k).toString()));
				}
				print("\t\t</node>\n");
			}
			for (MyEdge e : g.<MyEdge>getEachEdge()) {
				print("\t\t<edge id=\"%s\" source=\"%s\" target=\"%s\" directed=\"%s\">\n", e.getId(),
						e.getSourceNode().getId(), e.getTargetNode().getId(), e.isDirected());
				for (String k : e.getAttributeKeySet()) {
					if (k.equals("ui.j2dsk") || k.equals("ui.class") || k.equals("ui.pie-values")) {
						continue;
					}
					Class<? extends Object> c = e.getAttribute(k).getClass();
					if (!c.isPrimitive() && !(c == String.class) && !(c == Character.class) && !(c == Boolean.class)
							&& !(c == Integer.class) && !(c == Long.class) && !(c == Short.class) && !(c == Byte.class)
							&& !(c == Float.class) && !(c == Double.class)) {
						continue;
					}

					print("\t\t\t<data key=\"%s\">%s</data>\n", edgeAttributes.get(k),
							escapeXmlString(e.getAttribute(k).toString()));
				}
				print("\t\t</edge>\n");
			}
			print("\t</graph>\n");
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	private static String escapeXmlString(String s) {
		// why do you make me do this graphstream???
		return s.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;").replace("\"", "&quot;").replace("'",
				"&apos;");
	}

	/**
	 * 
	 * @param graphs
	 */
	public void exportGraphs(LinkedList<MyGraph> graphs, String fileName) {
		Iterator<MyGraph> graphIter = graphs.iterator();
		while (graphIter.hasNext()) {
			if (graphIter.next().isComposite()) {
				graphIter.remove();
			}
		}
		try {
			begin(fileName);
			isWritingMultigraph = true;
			for (MyGraph g : graphs) {
				exportGraph(g);
			}
			isWritingMultigraph = false;
			end();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

}