package com.beem.project.beem.ui;

import java.util.List;

import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.os.Handler;
import android.os.RemoteException;
import android.util.Log;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnKeyListener;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ScrollView;
import android.widget.TextView;

import com.beem.project.beem.BeemApplication;
import com.beem.project.beem.R;
import com.beem.project.beem.service.Contact;
import com.beem.project.beem.service.Message;
import com.beem.project.beem.service.aidl.IChat;
import com.beem.project.beem.service.aidl.IChatManager;
import com.beem.project.beem.service.aidl.IChatManagerListener;
import com.beem.project.beem.service.aidl.IMessageListener;
import com.beem.project.beem.service.aidl.IXmppFacade;

/**
 * This activity class provides the view for instant messaging after selecting a correspondant.
 * 
 * @author barbu
 */

public class SendIM extends Activity implements OnClickListener, OnKeyListener {

    /**
     * Listener for chat creation. (maybe not necessary)
     * 
     * @author darisk
     */
    private class OnChatListener extends IChatManagerListener.Stub {

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void chatCreated(IChat chat, boolean locally) throws RemoteException {
	    Log.i("LOG", "chatCreated");
	}

    }

    /**
     * Listener for new chat messages.
     * 
     * @author darisk
     */
    private class OnMessageListener extends IMessageListener.Stub {

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void processMessage(IChat chat, Message msg) throws RemoteException {

	    if (chat != mChat)
		return;
	    final Message m = msg;
	    mHandler.post(new Runnable() {

		@Override
		public void run() {
		    if (m.getBody() != null) {
			if (mSpeak == 2)
			    mText.append(m.getBody() + "\n");
			else {
			    String str = String.format(getString(R.string.SendIMSays), m.getFrom());
			    mText.append(str);
			    mText.append(m.getBody() + "\n");
			}
			mScrolling.fullScroll(ScrollView.FOCUS_DOWN);
			mToSend.requestFocus();
			mSpeak = 2;
		    }
		}
	    });
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void stateChanged(IChat chat) throws RemoteException {
	    // TODO: a integrer dans l'ui
	    // Log.d(TAG, "state changed");
	}
    }

    private static final String  TAG = "SEND_IM";
    private EditText             mToSend;
    private SendIMDialogSmiley   mSmyDialog;
    private SharedPreferences    mSet;
    private BeemApplication      mBeemApplication;
    private Handler              mHandler;
    private IXmppFacade          mService;
    private Contact              mContact;
    private IChatManager         mChatManager;
    private IChatManagerListener mChatManagerListener;
    private IMessageListener     mMessageListener;
    private IChat                mChat;
    private TextView             mText;
    private TextView             mLogin;

    private ScrollView           mScrolling;

    private char                 mSpeak;

    /**
     * Constructor.
     */
    public SendIM() {
	super();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void onClick(View view) {
	sendText();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void onCreate(Bundle saveBundle) {
	super.onCreate(saveBundle);
	mHandler = new Handler();
	mChatManagerListener = new OnChatListener();
	mMessageListener = new OnMessageListener();
	mBeemApplication = BeemApplication.getApplication(this);
	setContentView(R.layout.sendim);
	mToSend = (EditText) findViewById(R.id.userText);
	mSet = getSharedPreferences("lol", MODE_PRIVATE);
	mSmyDialog = new SendIMDialogSmiley(this, mSet);
	mToSend.setOnClickListener(this);
	mToSend.setOnKeyListener(this);
	mLogin = (TextView) findViewById(R.id.sendimlogin);
	// mContact = getIntent().getParcelableExtra("contact");
	mContact = new Contact(getIntent().getData());
	setViewHeader();
	mText = (TextView) findViewById(R.id.sendimlist);
	mScrolling = (ScrollView) findViewById(R.id.sendimscroll);
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public final boolean onCreateOptionsMenu(Menu menu) {
	super.onCreateOptionsMenu(menu);
	MenuInflater inflater = getMenuInflater();
	inflater.inflate(R.menu.sendimmenu, menu);
	return true;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void onDestroy() {
	super.onDestroy();
	if (mChatManager != null) {
	    try {
		mChatManager.removeChatCreationListener(mChatManagerListener);
		// TODO trouver quand detruire le chat
		// mChatManager.destroyChat(mChat);
	    } catch (RemoteException e) {
		Log.e(TAG, "mchat manager and SendIM destroy", e);
	    }
	}
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public boolean onKey(View v, int keyCode, KeyEvent event) {
	if (event.getAction() == KeyEvent.ACTION_DOWN) {
	    switch (keyCode) {
	    case KeyEvent.KEYCODE_DPAD_CENTER:
	    case KeyEvent.KEYCODE_ENTER:
		sendText();
		return true;
	    default:
		return false;
	    }
	}
	return false;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void onNewIntent(Intent intent) {
	super.onNewIntent(intent);
	mContact = new Contact(intent.getData());
	setViewHeader();
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public final boolean onOptionsItemSelected(MenuItem item) {
	switch (item.getItemId()) {
	case R.id.sendim_smiley:
	    mSmyDialog.show();
	    return true;
	default:
	    return false;
	}
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void onPause() {
	super.onPause();
	try {
	    mChat.setOpen(false);
	} catch (RemoteException e) {
	    Log.d(TAG, "Error while closing chat", e);
	}
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void onResume() {
	super.onResume();
	mBeemApplication = BeemApplication.getApplication(this);
	if (!mBeemApplication.isConnected())
	    mBeemApplication.startBeemService();
	mBeemApplication.callWhenConnectedToServer(mHandler, new Runnable() {

	    @Override
	    public void run() {
		mService = mBeemApplication.getXmppFacade();
		try {
		    if (mChatManager == null) {
			mChatManager = mService.getChatManager();
			mChatManager.addChatCreationListener(mChatManagerListener);
		    }
		    switchChat(mContact);
		} catch (RemoteException e) {
		    Log.e(TAG, "Error during chat manager creation", e);
		}
	    }
	});
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void onStart() {
	super.onStart();
	// TODO cancel the notification if any
	if (mContact == null)
	    mContact = getIntent().getParcelableExtra("contact");
	mService = mBeemApplication.getXmppFacade();
	setViewHeader();

    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void onStop() {
	super.onStop();
	try {
	    mChat.setOpen(false);
	} catch (RemoteException e) {
	    Log.d(TAG, "mchat open false", e);
	}
	mBeemApplication.unbindBeemService();
    }

    /**
     * Send a message to the contact over the XMPP connection. Also display it on activity view.
     * TODO : Gerer l'exception si la connexion se coupe pendant la conversation
     */
    private void sendText() {
	String text = mToSend.getText().toString();
	if (!text.equals("")) {
	    Message msg = new Message(mContact.getJID(), Message.MSG_TYPE_CHAT);
	    msg.setBody(text);
	    try {
		mChat.sendMessage(msg);
		if (mSpeak != 1)
		    mText.append(getString(R.string.SendIMYouSay) + text + '\n');
		else
		    mText.append(text + "\n");
		mToSend.setText(null);
		mScrolling.fullScroll(ScrollView.FOCUS_DOWN);
		mToSend.requestFocus();
		mSpeak = 1;
	    } catch (RemoteException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	    }
	}
    }

    /**
     * Set the header information in the window.
     */
    private void setViewHeader() {
	Drawable avatar = getResources().getDrawable(R.drawable.avatar);
	ImageView imgV = (ImageView) findViewById(R.id.sendimavatar);
	imgV.setImageDrawable(avatar);
	mLogin = (TextView) findViewById(R.id.sendimlogin);
	mLogin.setText(mContact.getJID());
	TextView status = (TextView) findViewById(R.id.sendimstatus);
	status.setTextSize(12);
	mLogin.setTextColor(getResources().getColor(R.color.white));
	String statmsg = mContact.getMsgState();
	if (statmsg != null)
	    status.setText(statmsg);
    }

    /**
     * Show the message history.
     * 
     * @param messages
     *            list of message to display
     */
    private void showMessageList(List<Message> messages) {
	mText.setText("");
	mSpeak = 0;
	for (Message message : messages) {
	    String from = message.getFrom();
	    if (from == null) {
		if (mSpeak != 1)
		    mText.append(getString(R.string.SendIMYouSay));
		mSpeak = 1;
	    } else {
		if (mSpeak != 2) {
		    String str = String.format(getString(R.string.SendIMSays), from);
		    mText.append(str);
		}
		mSpeak = 2;
	    }
	    mText.append(message.getBody() + '\n');
	}
	mScrolling.fullScroll(ScrollView.FOCUS_DOWN);
    }

    /**
     * Change the correspondant of the chat.
     * 
     * @param newContact
     *            New contact to chat with
     * @throws RemoteException
     *             if an errors occurs in the connection with the service
     */
    private void switchChat(Contact newContact) throws RemoteException {
	if (mChat != null)
	    mChat.setOpen(false);
	mChat = mChatManager.createChat(newContact, mMessageListener);
	showMessageList(mChat.getMessages());
	mChat.setOpen(true);
	mContact = newContact;
	mToSend.requestFocus();
    }
}