package ie.dcu.apps.ist.actions;

import java.net.*;
import java.util.*;
import java.util.logging.*;

import org.eclipse.jface.action.*;
import org.eclipse.jface.resource.*;

/**
 * Hover Action configured from a properties file.
 * 
 * @author Kevin McGuinness
 */
public class ConfiguredAction extends HoverAction {
	private static final Logger log = Logger.getLogger("ConfiguredAction");
	
	protected final Properties properties;
	private final String id;
	
	
	public ConfiguredAction(Properties properties) {
		this(properties, null, AS_PUSH_BUTTON);
	}
	
	
	public ConfiguredAction(Properties properties, int style) {
		this(properties, null, style);
	}
	
	
	public ConfiguredAction(Properties properties, String id, int style) {
		super(null, style);
		
		assert (properties != null);
		this.properties = properties;
		
		if (id != null) {
			this.id = id;
		} else {
			this.id = getClass().getSimpleName();
		}
		
		configure();
	}

	
	private void configure() {
		
		// Set id
		setId(id);

		// Set text
		setText(string("text"));
		
		// Set description
		String description;
		if ((description = string("description")) != null) {
			setDescription(description);
		}
		
		// Set tooltip
		String tooltip;
		if ((tooltip = string("tooltip")) != null) {
			setToolTipText(tooltip);
		}
		
		// Set accelerator
		Integer keycode;
		if ((keycode = accelerator("accelerator")) != null) {
			setAccelerator(keycode);
		}
	
		// Set images
		ImageDescriptor im;
		
		if ((im = image("image")) != null) {
			setImageDescriptor(im);
		}
		
		if ((im = image("hoverImage")) != null) {
			setHoverImageDescriptor(im);
		}
		
		if ((im = image("disabledImage")) != null) {
			setDisabledImageDescriptor(im);
		}
		
		// Set status
		Boolean status;
		
		if ((status = bool("checked") != null)) {
			setChecked(status);
		}
		
		if ((status = bool("enabled") != null)) {
			setEnabled(status);
		}
	}
	
	
	protected final Integer accelerator(String key) {
		String value = string(key);
		
		if (value == null) {
			return null;
		}
		
		int code = Action.convertAccelerator(value);
		
		if (code == 0) {
			log.warning("No accelerator: " + value);
			return null;
		}
		
		if (code == -1) {
			log.warning("Not a valid accelerator keycode: " + value);
			return null;
		}
		
		return code;
	}
	
	
	protected final Boolean bool(String key) {
		String value = string(key);
		
		if (value == null) {
			return null;
		}
		
		if (value.trim().equals("true")) {
			return true;
		} else if (value.trim().equals("false")) {
			return false;
		} else {
			log.warning("Not a boolean value: " + value);
			return null;
		}
	}
	
	
	protected final ImageDescriptor image(String key) {
		String url = string(key);
		
		if (url == null) {
			return null;
		}
		
		try {
			return ImageDescriptor.createFromURL(new URL(url));
			
		} catch (MalformedURLException e) {
			log.warning("Invalid URL for image " + url);
			return null;
		}
	}
	
	
	protected final String string(String key) {
		return properties.getProperty(key(key));
	}
	
	
	protected final String key(String name) {
		return String.format("action.%s.%s", id, name);
	}

}