package de.tudarmstadt.informatik.hostage.dao;

import android.content.Context;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.io.StreamCorruptedException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import de.tudarmstadt.informatik.hostage.R;
import de.tudarmstadt.informatik.hostage.model.Profile;
import de.tudarmstadt.informatik.hostage.model.ProfilesHolder;
import de.tudarmstadt.informatik.hostage.ui2.activity.MainActivity;
import de.tudarmstadt.informatik.hostage.ui2.adapter.ProfileManagerListAdapter;

/**
 * @author Alexander Brakowski
 * @created 10.02.14 20:24
 */
public class ProfileManager {
	private static ProfileManager INSTANCE = null;

	private ProfileManagerListAdapter mProfileListAdapter = null;
	private Profile mCurrentActivatedProfile = null;
	private Profile mRandomProfile = null;

	private static final String PERSIST_FILENAME = "hostage_profiles.dat";

	private ProfilesHolder holder;

	public static ProfileManager getInstance(){
		if(INSTANCE == null){
			INSTANCE = new ProfileManager();
		}

		if(INSTANCE.getNumberOfProfiles() == 0){
			INSTANCE.loadData();
		}

		return INSTANCE;
	}

	private ProfileManager(){
		holder = new ProfilesHolder();
		holder.mProfiles = new HashMap<Integer, Profile>();
	}

	public void loadData(){
		try {
			FileInputStream fin = MainActivity.getContext().openFileInput(PERSIST_FILENAME);
			ObjectInputStream ois = new ObjectInputStream(fin);

			Object obj = ois.readObject();
			ois.close();
			fin.close();

			if(obj != null && obj instanceof ProfilesHolder){
				this.holder = (ProfilesHolder) obj;

				for(Map.Entry<Integer, Profile> entry: holder.mProfiles.entrySet()){
					if(entry.getValue().mActivated){
						this.mCurrentActivatedProfile = entry.getValue();
					}

					if(entry.getValue().mIsRandom){
						this.mRandomProfile = entry.getValue();
					}
				}
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (StreamCorruptedException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
		} finally {
			if(holder.mProfiles.size() == 0){
				this.fillWithSampleData();
				loadData();
			}

			if(this.mRandomProfile != null){
				randomizeProtocols(mRandomProfile);
			}
		}
	}

	public void persistData(){
		try {
			FileOutputStream fout = MainActivity.getContext().openFileOutput(PERSIST_FILENAME, Context.MODE_PRIVATE);
			ObjectOutputStream oos = new ObjectOutputStream(fout);

			oos.writeObject(holder);
			oos.close();
			fout.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}

	}

	public List<Profile> getProfilesList(){
		return new ArrayList<Profile>(getProfilesCollection());
	}

	public Collection<Profile> getProfilesCollection(){
		if(holder.mProfiles.size() == 0 || holder.mProfiles == null){
			this.loadData();
		}

		return holder.mProfiles.values();
	}

	public Map<Integer, Profile> getMapProfiles(){
		return holder.mProfiles;
	}

	public void randomizeProtocols(Profile profile){
		for(String protocol: MainActivity.getContext().getResources().getStringArray(R.array.protocols)){
			double rand = Math.random();

			if(rand > 0.4){
				profile.mActiveProtocols.put(protocol, true);
			} else {
				profile.mActiveProtocols.put(protocol, false);
			}
		}

		persistData();
	}

	public long persistProfile(Profile profile){
		if(profile.mId == -1){
			profile.mId = ++holder.mIncrementValue;
		}

		holder.mProfiles.put(profile.mId, profile);

		this.persistData();

		if(this.mProfileListAdapter != null){
			this.mProfileListAdapter.notifyDataSetChanged();
		}

		return profile.mId;
	}

	public Profile getProfile(int id){
		if(holder.mProfiles.size() == 0){
			loadData();
		}

		if(this.holder.mProfiles.containsKey(id)){
			return this.holder.mProfiles.get(id);
		}

		return null;
	}

	public void addProfile(Profile profile){
		this.addProfile(profile, true);
	}

	public void addProfile(Profile profile, boolean persist){

		if(profile.mId == -1){
			profile.mId = ++holder.mIncrementValue;
		}

		holder.mProfiles.put(profile.mId, profile);

		if(persist){
			persistData();
		}

		if(this.mProfileListAdapter != null){
			this.mProfileListAdapter.add(profile);
			this.mProfileListAdapter.notifyDataSetChanged();
		}
	}

	public void deleteProfile(Profile profile){
		if(this.holder.mProfiles.containsKey(profile.mId)){
			this.holder.mProfiles.remove(profile.mId);
			this.persistData();
			//this.dbh.deleteProfile(profile.mId);

			if(this.mProfileListAdapter != null){
				this.mProfileListAdapter.remove(profile);
				this.mProfileListAdapter.notifyDataSetChanged();
			}
		}
	}

	public void clearProfiles(){
		holder.mProfiles.clear();
		persistData();
	}

	public void activateProfile(Profile profile){
		if(profile.equals(this.mCurrentActivatedProfile)) return;

		if(this.mCurrentActivatedProfile != null){
			this.mCurrentActivatedProfile.mActivated = false;
			this.persistProfile(this.mCurrentActivatedProfile);
		}

		profile.mActivated = true;
		this.mCurrentActivatedProfile = profile;
		this.holder.mProfiles.put(profile.mId, profile);
		persistData();
	}

	public Profile getCurrentActivatedProfile(){
		return mCurrentActivatedProfile;
	}

	public void setProfileListAdapter(ProfileManagerListAdapter profileListAdapter){
		this.mProfileListAdapter = profileListAdapter;
	}


	public ProfileManagerListAdapter getProfileListAdapter(){
		return this.mProfileListAdapter;
	}

	public int getNumberOfProfiles(){
		return holder.mProfiles.size();
	}

	public void fillWithSampleData(){
		this.addProfile(new Profile(
				0,
				"Windows Vista",
				"Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat.",
				R.drawable.ic_profile_vista,
				false
		), false);

		this.addProfile(new Profile(
				1,
				"Windows 7",
				"Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat.",
				R.drawable.ic_profile_w7,
				false
		), false);

		this.addProfile(new Profile(
				2,
				"Unix Distro",
				"Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat.",
				R.drawable.ic_profile_unix,
				false
		), false);

		Profile randomProfile = new Profile(
				3,
				"Random",
				"Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat.",
				R.drawable.ic_service_green,
				false
		);

		randomProfile.mIsRandom = true;

		this.addProfile(randomProfile, false);

		this.addProfile(new Profile(
				4,
				"Mix",
				"Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat.",
				R.drawable.ic_service_green,
				false
		), false);

		holder.mIncrementValue = 4;
		persistData();
	}
}