package com.beem.project.beem.ui;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.jivesoftware.smack.util.StringUtils;

import android.app.ExpandableListActivity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.database.DataSetObserver;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.RemoteException;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.widget.ExpandableListAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.beem.project.beem.BeemService;
import com.beem.project.beem.R;
import com.beem.project.beem.service.Contact;
import com.beem.project.beem.service.PresenceAdapter;
import com.beem.project.beem.service.aidl.IBeemRosterListener;
import com.beem.project.beem.service.aidl.IRoster;
import com.beem.project.beem.service.aidl.IXmppFacade;
import com.beem.project.beem.utils.Status;

public class ContactList extends ExpandableListActivity {

    private static final String TAG = "CONTACTLIST_ACT";
    private static final String DEFAULT_GROUP = "Default";
    private MyExpandableListAdapter mAdapter;
    private IRoster mRoster;
    private Map<String, List<Contact>> groupMap;
    private List<String> groupName;
    private List<Contact> mListContact;
    private Handler mHandler;
    private IXmppFacade xmppFacade = null;
    private final ServiceConnection mServConn = new BeemServiceConnection();

    /**
     * Callback for menu creation.
     * @param menu the menu created
     * @return true on success, false otherwise
     */
    @Override
    public final boolean onCreateOptionsMenu(Menu menu) {
	super.onCreateOptionsMenu(menu);
	MenuInflater inflater = getMenuInflater();
	inflater.inflate(R.menu.contact_list, menu);
	return true;
    }

    /**
     * Callback for menu item selected.
     * @param item the item selected
     * @return true on success, false otherwise
     */
    @Override
    public final boolean onOptionsItemSelected(MenuItem item) {
	switch (item.getItemId()) {
	    case R.id.contact_list_menu_settings:
		startActivity(new Intent(this, EditSettings.class));
		return true;
	    case R.id.contact_list_menu_add_contact:
		startActivity(new Intent(ContactList.this, AddContact.class));
		return true;
	    default:
		return false;
	}
    }

    @Override
    protected void onCreate(Bundle saveBundle) {
	super.onCreate(saveBundle);
	bindService(new Intent(this, BeemService.class), mServConn, BIND_AUTO_CREATE);
	mHandler = new Handler();
	groupMap = new HashMap<String, List<Contact>>();
	groupName = new ArrayList<String>();
    }

    @Override
    protected void onDestroy() {
	super.onDestroy();
	unbindService(mServConn);
    }

    class ComparatorContactListByName<T> implements Comparator<T> {
	@Override
	public int compare(T c1, T c2) {
	    return ((Contact) c1).getName().compareToIgnoreCase(((Contact) c2).getName());
	}
    }

    class ComparatorContactListByStatusAndName<T> implements Comparator<T> {
	@Override
	public int compare(T c1, T c2) {
	    if (((Contact) c1).getStatus() < ((Contact) c2).getStatus()) {
		return 1;
	    } else if (((Contact) c1).getStatus() > ((Contact) c2).getStatus()) {
		return -1;
	    } else
		return ((Contact) c1).getName().compareToIgnoreCase(((Contact) c2).getName());
	}
    }

    private void buildContactList(List<Contact> listContact) {
	mListContact = listContact;
	Collections.sort(mListContact, new ComparatorContactListByStatusAndName<Contact>());
	for (Contact contact : mListContact) {
	    for (String group : contact.getGroups()) {
		if (!groupMap.containsKey(group)) {
		    groupMap.put(group, new ArrayList<Contact>());
		    groupName.add(group);
		}
		try {
		    if (!groupMap.get(group).contains(contact))
			groupMap.get(group).add(contact);
		} catch (NullPointerException e) {
		    Log.e(TAG, "Failed to find group in groupMap", e);
		}
	    }
	    if (contact.getGroups().isEmpty()) {
		if (!groupMap.containsKey(DEFAULT_GROUP)) {
		    groupMap.put(DEFAULT_GROUP, new ArrayList<Contact>());
		    groupName.add(DEFAULT_GROUP);
		}
		groupMap.get(DEFAULT_GROUP).add(contact);
	    }
	}
	mAdapter = new MyExpandableListAdapter();
	setListAdapter(mAdapter);
    }

    private class BeemRosterListener extends IBeemRosterListener.Stub {

	@Override
	public void onEntriesAdded(List<String> addresses) throws RemoteException {
	    for (String str : addresses) {
		Contact curContact = mRoster.getContact(str);
		for (String group : curContact.getGroups()) {
		    if (!groupMap.containsKey(group)) {
			groupMap.put(group, new ArrayList<Contact>());
			groupName.add(group);
		    }
		    try {
			groupMap.get(group).add(curContact);
		    } catch (NullPointerException e) {
			Log.e(TAG, "Failed to find group in groupMap", e);
		    }
		}
	    }
	    mHandler.post(new RunnableChange());
	}

	@Override
	public void onEntriesDeleted(List<String> addresses) throws RemoteException {
	    for (List<Contact> cList : groupMap.values()) {
		for (Contact curContact : cList) {
		    for (String addr : addresses) {
			if (addr.equals(curContact.getJID())) {
			    cList.remove(curContact);
			    if (cList.isEmpty()) {
				groupMap.values().remove(cList);
			    }
			}
		    }
		}
	    }
	    mHandler.post(new RunnableChange());
	}

	@Override
	public void onEntriesUpdated(List<String> addresses) throws RemoteException {
	    for (String str : addresses) {
		Contact curContact = mRoster.getContact(str);
		for (String group : curContact.getGroups()) {
		    if (!groupMap.containsKey(group)) {
			groupMap.put(group, new ArrayList<Contact>());
			groupName.add(group);
			groupMap.get(group).add(curContact);
		    } else {
			boolean found = false;
			for (Contact tempContact : groupMap.get(group)) {
			    if (tempContact.getJID() == str) {
				curContact = tempContact;
				found = true;
				break;
			    }
			}
			if (!found) {
			    groupMap.get(group).add(curContact);
			}
		    }
		}
	    }
	    mHandler.post(new RunnableChange());
	}

	@Override
	public void onPresenceChanged(PresenceAdapter presence) throws RemoteException {
	    for (Contact curContact : mListContact) {
		if (curContact.getJID().equals(StringUtils.parseBareAddress(presence.getFrom()))) {
		    curContact.setStatus(presence);
		    mHandler.post(new RunnableChange());
		    return;
		}
	    }
	}

	private class RunnableChange implements Runnable {
	    @Override
	    public void run() {
		mAdapter.changed();
	    }
	}

    }

    private class MyExpandableListAdapter implements ExpandableListAdapter {

	class MyOnClickListener implements OnClickListener {

	    private final Contact mContact;

	    public MyOnClickListener(Contact contact) {
		mContact = contact;
	    }

	    @Override
	    public void onClick(View v) {
		Intent i = new Intent(ContactList.this, SendIM.class);
		i.setData(mContact.toUri());
		startActivity(i);
	    }

	}

	class MyOnLongClickListener implements OnLongClickListener {

	    private final Contact mContact;

	    public MyOnLongClickListener(Contact contact) {
		mContact = contact;
	    }

	    @Override
	    public boolean onLongClick(View v) {
		createDialog(mContact);
		return true;
	    }
	}

	private final List<DataSetObserver> observers;

	public MyExpandableListAdapter() {
	    observers = new ArrayList<DataSetObserver>();
	}

	@Override
	public boolean areAllItemsEnabled() {
	    return true;
	}

	private void bindView(View view, Contact curContact) {

	    if (curContact != null) {
		ImageView imgV = (ImageView) view.findViewById(R.id.contactliststatus);
		Drawable imageDrawable = null;
		switch (curContact.getStatus()) {
		    case Status.CONTACT_STATUS_AVAILABLE:
			imageDrawable = getResources().getDrawable(R.drawable.online);
			break;
		    case Status.CONTACT_STATUS_AVAILABLE_FOR_CHAT:
			imageDrawable = getResources().getDrawable(R.drawable.chat);
			break;
		    case Status.CONTACT_STATUS_AWAY:
			imageDrawable = getResources().getDrawable(R.drawable.away);
			break;
		    case Status.CONTACT_STATUS_BUSY:
			imageDrawable = getResources().getDrawable(R.drawable.dnd);
			break;
		    case Status.CONTACT_STATUS_DISCONNECT:
			imageDrawable = getResources().getDrawable(R.drawable.offline);
			break;
		    case Status.CONTACT_STATUS_UNAVAILABLE:
			imageDrawable = getResources().getDrawable(R.drawable.requested);
			break;
		    default:
			imageDrawable = getResources().getDrawable(R.drawable.error);
			break;
		}
		imgV.setImageDrawable(imageDrawable);

		TextView v = (TextView) view.findViewById(R.id.contactlistpseudo);
		if (v != null) {
		    v.setText(curContact.getName());
		}

		v = (TextView) view.findViewById(R.id.contactlistmsgperso);
		if (v != null) {
		    v.setText(curContact.getMsgState());
		}

		// TODO: Rajouter l'avatar du contact getAvatar() dans la classe
		imgV = (ImageView) view.findViewById(R.id.contactlistavatar);
		if (imgV != null) {
		    imageDrawable = getResources().getDrawable(R.drawable.avatar);
		    imgV.setImageDrawable(imageDrawable);
		}
	    }
	}

	public void changed() {
	    for (DataSetObserver obs : observers) {
		obs.onChanged();
	    }
	}

	void createDialog(Contact contact) {
	    ContactDialog dialogContact = new ContactDialog(ContactList.this, contact);
	    dialogContact.setOwnerActivity(ContactList.this);
	    dialogContact.show();
	}

	@Override
	public Object getChild(int groupPosition, int childPosition) {
	    try {
		return groupMap.get(groupName.get(groupPosition)).get(childPosition);
	    } catch (NullPointerException e) {
		Log.e(TAG, "Child not found", e);
		return null;
	    }
	}

	@Override
	public long getChildId(int groupPosition, int childPosition) {
	    try {
		groupMap.get(groupName.get(groupPosition)).get(childPosition);
	    } catch (NullPointerException e) {
		Log.e(TAG, "Child not found", e);
		return 0;
	    }
	    return childPosition;
	}

	@Override
	public int getChildrenCount(int groupPosition) {
	    try {
		return groupMap.get(groupName.get(groupPosition)).size();
	    } catch (NullPointerException e) {
		Log.e(TAG, "Child not found", e);
		return 0;
	    }
	}

	@Override
	public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView,
	    ViewGroup parent) {
	    View v;
	    if (convertView == null) {
		v = LayoutInflater.from(ContactList.this).inflate(R.layout.contactlistcontact, null);
	    } else {
		v = convertView;
	    }
	    Contact contact = groupMap.get(groupName.get(groupPosition)).get(childPosition);
	    bindView(v, contact);

	    v.setOnLongClickListener(new MyOnLongClickListener(contact));
	    v.setOnClickListener(new MyOnClickListener(contact));
	    return v;
	}

	@Override
	public long getCombinedChildId(long groupId, long childId) {
	    return 1000 * groupId + childId;
	}

	@Override
	public long getCombinedGroupId(long groupId) {
	    return 1000 * groupId;
	}

	@Override
	public Object getGroup(int groupPosition) {
	    try {
		return groupMap.get(groupName.get(groupPosition));
	    } catch (NullPointerException e) {
		Log.e(TAG, "Group not found", e);
		return null;
	    }
	}

	@Override
	public int getGroupCount() {
	    return groupMap.size();
	}

	@Override
	public long getGroupId(int groupPosition) {
	    return groupPosition;
	}

	@Override
	public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
	    if (convertView == null) {
		convertView = LayoutInflater.from(ContactList.this).inflate(R.layout.contactlistgroup, null);
	    }
	    TextView groupTextView = (TextView) convertView.findViewById(R.id.textgroup);
	    groupTextView.setText(groupName.get(groupPosition));
	    return convertView;
	}

	@Override
	public boolean hasStableIds() {
	    return false;
	}

	@Override
	public boolean isChildSelectable(int groupPosition, int childPosition) {
	    return true;
	}

	@Override
	public boolean isEmpty() {
	    return groupMap.isEmpty();
	}

	@Override
	public void onGroupCollapsed(int groupPosition) {
	}

	@Override
	public void onGroupExpanded(int groupPosition) {
	}

	@Override
	public void registerDataSetObserver(DataSetObserver observer) {
	    observers.add(observer);
	}

	@Override
	public void unregisterDataSetObserver(DataSetObserver observer) {
	    observers.remove(observer);
	}
    }

    private class BeemServiceConnection implements ServiceConnection {

	@Override
	public void onServiceConnected(ComponentName name, IBinder service) {
	    xmppFacade = IXmppFacade.Stub.asInterface(service);
	    try {
		mRoster = xmppFacade.getRoster();
		if (mRoster != null) {
		    mRoster.addRosterListener(new BeemRosterListener());
		    buildContactList(mRoster.getContactList());
		}
	    } catch (RemoteException e) {
		e.printStackTrace();
	    }
	}

	@Override
	public void onServiceDisconnected(ComponentName name) {
	    xmppFacade = null;
	    mRoster = null;
	}
    }
}
