package net.wotonomy.web;

import net.wotonomy.foundation.NSArray;
import net.wotonomy.foundation.NSData;
import net.wotonomy.foundation.NSDictionary;

/**
 * WOImage renders a dynamically generated IMG tag. The URL for the image SRC
 * can be static, or it can be generated dynamically to return a NSData object
 * (with a mime-type) or even return the contents of a file (not implemented
 * yet).
 *
 * Bindings are:
 * <UL>
 * <LI>src: A static URL for the image source.</li>
 * <li>data: A NSData object with the image content. Must be used with
 * mimeType.</li>
 * <li>mimeType: The MIME type for the image data. Can be used with filename or
 * data bindings.</li>
 * <li>filename: The path to a file containing an image.</li>
 * <li>framework: The optional framework from whence the image should be
 * retrieved (used in conjunction with filename).</li>
 *
 * @author ezamudio@nasoft.com
 * @author $Author: cgruber $
 * @version $Revision: 905 $
 */
public class WOImage extends WODynamicElement {

	protected String src;
	protected String filename;
	protected String framework;
	protected NSData data;
	protected String mimeType;

	protected WOImage() {
		super();
	}

	public WOImage(String aName, NSDictionary aMap, WOElement template) {
		super(aName, aMap, template);
	}

	public void setSrc(String value) {
		src = value;
	}

	public String src() {
		return src;
	}

	public void setFilename(String value) {
		filename = value;
	}

	public String filename() {
		return filename;
	}

	public void setFramework(String value) {
		framework = value;
	}

	public String framework() {
		return framework;
	}

	public void setData(NSData value) {
		data = value;
	}

	public NSData data() {
		return data;
	}

	public void setMimeType(String value) {
		mimeType = value;
	}

	public String mimeType() {
		return mimeType();
	}

	public String sourceURL(WOContext c) {
		if (associations.objectForKey("src") != null)
			return (String) valueForProperty("src", c.component());
		if (associations.objectForKey("data") != null) {
			return c.componentActionURL();
		}
		if (associations.objectForKey("filename") != null) {
			WOComponent component = c.component();

			String framework = stringForProperty("framework", component);
			String filename = stringForProperty("filename", component);
			if (filename != null && framework == null) {
				if (filename.startsWith("/")) {
					int i = filename.lastIndexOf("/");
					if (i > 0) {
						framework = filename.substring(0, i);
						if (i < filename.length()) {
							filename = filename.substring(i + 1);
						}
					}
				} else {
					// just until we figure out how we're handling bundles/localization
					framework = component.frameworkName();
					if (framework != null) {
						framework = framework + '/' + component.name() + ".wo";
					} else {
						framework = '/' + component.name() + ".wo";
					}
				}
			}
			return WOApplication.application().resourceManager().urlForResourceNamed(filename, framework,
					c.request().browserLanguages(), c.request());
		}
		return "NO SOURCE";
	}

	public void appendToResponse(WOResponse r, WOContext c) {
		r.appendContentString("<IMG SRC=\"");
		r.appendContentString(sourceURL(c));
		r.appendContentString("\"");
		r.appendContentString(additionalHTMLProperties(c.component(),
				new NSArray(new Object[] { "src", "filename", "framework", "data", "mimeType" })));
		r.appendContentString(">");
	}

	public WOActionResults invokeAction(WORequest r, WOContext c) {
		if (c.senderID().equals(c.elementID())) {
			Object data = valueForProperty("data", c.component());
			if (data instanceof byte[])
				data = new NSData((byte[]) data);
			if (data instanceof NSData) {
				String mt = stringForProperty("mimeType", c.component());
				if (mt == null)
					throw new IllegalArgumentException("WOImage: No mimeType specified for data.");
				WOResponse img = new WOResponse();
				img.setContent((NSData) data);
				img.setHeader(mt, "content-type");
				return img;
			} else if (filename() != null) {
				// will this thing use frameworks, or regular JAR files with resources?
				// mp: both/either, depending on which resource manager implementation
			}
		}
		return null;
	}

}