package ie.dcu.apps.ist;

import ie.dcu.util.*;

import java.io.*;
import java.net.*;
import java.security.*;
import java.util.*;

import static ie.dcu.util.FileUtils.pathJoin;
import static ie.dcu.util.OsUtils.*;

/**
 * Base application. Contains information strings and methods to load
 * application wide resources.
 * 
 * @author Kevin McGuinness
 */
public class Application {
	public static final String APP_ID   = "ist";
	public static final String APP_NAME = "AISO (Annotation of Image Segments using Ontologies)";
	public static final String APP_VERSION  = "0.2.1 (beta)";
	public static final String APP_RESOURCE_DIR = "resources";
	
	/**
	 * Default locations to look for plugins
	 */
	public static final String[] DEFAULT_PLUGIN_SEARCH_PATH 
		= defaultPluginSearchPath();
	
	/**
	 * Loads a properties file from the application resource area
	 * (resources/config)
	 * 
	 * @param name
	 *        The properties file name. ".properties" will be appended if
	 *        necessary.
	 * @return A Properties object
	 * @throws IOException
	 *         If there is an error creating the Properties object.
	 */
	public static Properties loadProperties(String name) throws IOException {
		if (!name.endsWith(".properties")) {
			name = name + ".properties";
		}
		
		String path = FileUtils.pathJoin(APP_RESOURCE_DIR, "config", name);
		File file = new File(path);
		System.out.println("Path:" + file);
		return PropsUtils.load(file);
	}
	
	/**
	 * Returns the users plugins folder
	 */
	public static String userPluginsFolder() {
		return pathJoin(userHome(), ".ist", "plugins");
	}
	
	/**
	 * Returns the applications base folder
	 */
	public static String applicationFolder() {
		String apphome = System.getenv("IST_HOME");
		if (apphome != null) {
			File file = new File(apphome);
			if  (file.isDirectory()) {
				return file.getAbsolutePath();
			}
		} 
		
		ProtectionDomain domain = Application.class.getProtectionDomain();
		CodeSource source = domain.getCodeSource();
		URL location = source.getLocation();
		String path = location.getPath();
		try {
			
			path = URLDecoder.decode(path, "UTF-8");
			if (isWindows()) {
				path = path.substring(1);
			}
				
			path = new File(path).getParent();
		} catch (UnsupportedEncodingException e) {
			path = System.getProperty("user.dir");
		}
			
		return path;
	}
	
	public static String applicationPluginsFolder() {
		return pathJoin(applicationFolder(), "plugins");
	}
	
	public static String osxPluginSearchPath() {
		return pathJoin(userHome(), "Library", 
			"Application Support", APP_NAME, "Plugins");
	}
	
	private static String[] defaultPluginSearchPath() {
		ArrayList<String> paths = new ArrayList<String>();
		paths.add(userPluginsFolder());
		if (isMacOSX()) {
			paths.add(osxPluginSearchPath());
		}
		paths.add(applicationPluginsFolder());
		return paths.toArray(new String[paths.size()]);
	}
	
}