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package de.blinkt.openvpn;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.StreamCorruptedException;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Set;

import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;

public class ProfileManager {
	private static final String PREFS_NAME =  "VPNList";



	private static ProfileManager instance;
	private HashMap<String,VpnProfile> profiles=new HashMap<String, VpnProfile>();

	public static VpnProfile get(String key) {
		checkInstance();
		return instance.profiles.get(key);
		
	}

	private ProfileManager() { }
	
	private static void checkInstance() {
		if(instance == null) 
			instance = new ProfileManager();
	}

	public static ProfileManager getInstance() {
		checkInstance();
		return instance;
	}
	
	
	
	public Collection<VpnProfile> getProfiles() {
		return profiles.values();
	}
	
	public VpnProfile getProfileByName(String name) {
		for (VpnProfile vpnp : profiles.values()) {
			if(vpnp.getName().equals(name)) {
				return vpnp;
			}
		}
		return null;			
	}

	public void saveProfileList(Activity activity) {
		SharedPreferences sharedprefs = activity.getSharedPreferences(PREFS_NAME,Activity.MODE_PRIVATE);
		Editor editor = sharedprefs.edit();
		editor.putStringSet("vpnlist", profiles.keySet());
		editor.commit();
	}

	public void addProfile(VpnProfile profile) {
		profiles.put(profile.getUUID().toString(),profile);
		
	}
	void loadVPNList(Context context) {
		profiles = new HashMap<String, VpnProfile>();
		SharedPreferences settings =context.getSharedPreferences(PREFS_NAME,Activity.MODE_PRIVATE);
		Set<String> vlist = settings.getStringSet("vpnlist", null);
		if(vlist==null){
			vlist = new HashSet<String>();
		}

		for (String vpnentry : vlist) {
			try {
				ObjectInputStream vpnfile = new ObjectInputStream(context.openFileInput(vpnentry + ".vp"));
				VpnProfile vp = ((VpnProfile) vpnfile.readObject());

				profiles.put(vp.getUUID().toString(), vp);

			} catch (StreamCorruptedException e) {
				e.printStackTrace();
			} catch (FileNotFoundException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			} catch (ClassNotFoundException e) { 
				e.printStackTrace();
			}
		}
	}

}