package ie.dcu.apps.ist.actions;

import ie.dcu.apps.ist.*;
import ie.dcu.segment.Segmenter;
import ie.dcu.util.OsUtils;

import java.io.IOException;
import java.util.*;
import java.util.logging.Logger;

/**
 * Manages application actions.
 * 
 * @author Kevin McGuinness
 */
public class ActionManager {
	private static final Logger log = Logger.getLogger("ActionManager");
	
	private final AppWindow window;
	private final Map<String, AppAction> actions;
	private ArrayList<SelectSegmenterAction> segmenterActions;
	private Properties props;
	
	
	public ActionManager(AppWindow window) {
		
		this.window = window;
		this.actions = new HashMap<String, AppAction>();
		
		try {
			this.props = Application.loadProperties(getPropertiesFile());
		} catch (IOException e) {
			log.severe("Error loading action properties: " + 
					e.getLocalizedMessage());
			throw new RuntimeException(e);
		}
		
		init();
	}
	
	
	private String getPropertiesFile() {
		return OsUtils.isMacOS() ? "actions.mac" : "actions";
	}
	
	
	Properties getProperties() {
		return props;
	}
	
	
	AppWindow getWindow() {
		return window;
	}
	

	public void init() {
		add(new OpenAction(this));
		add(new SaveAction(this));
		add(new SaveAsAction(this));
		add(new AboutAction(this));
		add(new CopyAction(this));
		add(new CloseAction(this));
		add(new ExitAction(this));
		add(new ExportViewAction(this));
		add(new ExportImageMapAction(this));
		add(new ExportTransparentPNGAction(this));
		add(new HelpAction(this));
		add(new PreferencesAction(this));
		add(new PrintAction(this));
		add(new RedoAction(this));
		add(new UndoAction(this));
		add(new NextAction(this));
		add(new PreviousAction(this));
		add(new OpenExperimentAction(this));
		add(new ConfigureSegmenterAction(this));
		
		// Add select segmenter actions
		SegmenterRegistry registry = SegmenterRegistry.getInstance();
		for (Segmenter s : registry) {
			add(new SelectSegmenterAction(this, registry, s));
		}
	}
	
	
	public void add(AppAction action) {
		actions.put(action.id(), action);
	}
	
	
	public <T extends AppAction> T get(Class<T> clazz) {
		return clazz.cast(actions.get(id(clazz)));
	} 
	
	
	public <T extends AppAction> T get(Class<T> clazz, String id) {
		return clazz.cast(actions.get(id));
	}
	
	
	public void setEnabled(String id, boolean enabled) {
		AppAction action = actions.get(id);
		if (action != null) {
			action.setEnabled(enabled);
		}
	}
	
	
	public <T extends AppAction> void setEnabled(Class<T> clazz, boolean enabled) {
		AppAction action = get(clazz);
		if (action != null) {
			action.setEnabled(enabled);
		}
	}
	
	
	public Collection<SelectSegmenterAction> getSegmentationActions() {
		if (segmenterActions == null) {
			segmenterActions = new ArrayList<SelectSegmenterAction>();
			for (AppAction a : actions.values()) {
				if (a instanceof SelectSegmenterAction) {
					segmenterActions.add((SelectSegmenterAction) a);
				}
			}
		}
		
		return Collections.unmodifiableCollection(segmenterActions);
	}
	
	
	private String id(Class<?> clazz) {
		return clazz.getName();
	}
}