/**
 * 
 */
package ie.dcu.apps.ist.export.imagemap;

import java.awt.Polygon;
import java.awt.Rectangle;
import java.net.*;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;


public class MapArea {
	
	private String href;
	private String alt;
	private AreaShape shape;
	private int[] coords;
	private final Map<String, String> attrs;
	
	public MapArea() {
		href = "";
		alt = "";
		shape = AreaShape.Polygon;
		coords = new int[0];
		attrs = new HashMap<String, String>();
	}
	
	public void addAttr(String key, String value) {
		attrs.put(key, value);
	}

	public String getHref() {
		return href;
	}

	public void setHref(String href) {
		this.href = href == null ? "" : href;
	}

	public String getAlt() {
		return alt;
	}

	public void setAlt(String alt) {
		this.alt = alt == null ? "" : alt;
	}
	
	public AreaShape getShape() {
		return shape;
	}

	public void setShape(AreaShape shape) {
		this.shape = shape == null ? AreaShape.Polygon : shape;
	}

	public int[] getCoords() {
		return coords;
	}

	public void setCoords(int[] coords) {
		this.coords = coords == null ? new int[0] : coords;
	}

	public void setRect(Rectangle rect) {
		setShape(AreaShape.Rectangle);
		int[] coords = {
				rect.x, 
				rect.y, 
				rect.x + rect.width, 
				rect.y + rect.height
		};
		setCoords(coords);
	}
	
	public void setCircle(int x, int y, int r) {
		setShape(AreaShape.Circle);
		int[] coords = { x, y, r };
		setCoords(coords);
	}
	
	public void setPolygon(Polygon poly) {
		setShape(AreaShape.Polygon);
		int[] coords = new int[2*poly.npoints];
		for (int i = 0, j = 0; i < poly.npoints; i++) {
			coords[j++] = poly.xpoints[i];
			coords[j++] = poly.ypoints[i];
		}
		setCoords(coords);
	}
	
	public void export(StringBuffer sb, int indent) {
		String encodedHREF = href;
		if (href.length() != 0) {
			try {
				URI uri = new URI(href);
				URL url = uri.toURL();
				encodedHREF = url.toString();
			} catch (URISyntaxException e) {
				// Ignore exceptions, the href string will be used instead
			} catch (MalformedURLException e) {
				// Ignore exceptions, the href string will be used instead
			}
		}
		
		HtmlTag tag = new HtmlTag("area");
		tag
		  .attr("href", encodedHREF)
		  .attr("alt", alt)
		  .attr("shape", shape.toString())
		  .attr("coords", getCoordsString());
		
		for (Entry<String, String> entry : attrs.entrySet()) {
			tag.attr(entry.getKey(), entry.getValue());
		}
		
		tag.open(sb, indent, true);
	}
	
	public String getCoordsString() {
		StringBuffer sb = new StringBuffer();
		boolean first = true;
		for (int coord : coords) {
			if (!first) {
				sb.append(',');
			}
			sb.append(coord);
			first = false;
		}
		return sb.toString();
	}
}