package org.linphone.ui;
/*
BubbleChat.java
Copyright (C) 2012  Belledonne Communications, Grenoble, France

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.HashMap;
import java.util.Map.Entry;

import org.linphone.LinphoneUtils;
import org.linphone.R;
import org.linphone.core.LinphoneChatMessage;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.text.Html;
import android.text.Spannable;
import android.text.SpannableStringBuilder;
import android.text.Spanned;
import android.text.method.LinkMovementMethod;
import android.text.style.ImageSpan;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.RelativeLayout.LayoutParams;
import android.widget.TextView;

/**
 * @author Sylvain Berfini
 */
public class BubbleChat {
	private static final HashMap<String, Integer> emoticons = new HashMap<String, Integer>();
	static {
	    emoticons.put(":)", R.drawable.emo_im_happy);
	    emoticons.put(":-)", R.drawable.emo_im_happy);
	    emoticons.put(":(", R.drawable.emo_im_sad);
	    emoticons.put(":-(", R.drawable.emo_im_sad);
	    emoticons.put(":-P", R.drawable.emo_im_tongue_sticking_out);
	    emoticons.put(":P", R.drawable.emo_im_tongue_sticking_out);
	    emoticons.put(";-)", R.drawable.emo_im_winking);
	    emoticons.put(";)", R.drawable.emo_im_winking);
	    emoticons.put(":-D", R.drawable.emo_im_laughing);
	    emoticons.put(":D", R.drawable.emo_im_laughing);
	    emoticons.put("8-)", R.drawable.emo_im_cool);
	    emoticons.put("8)", R.drawable.emo_im_cool);
	    emoticons.put("O:)", R.drawable.emo_im_angel);
	    emoticons.put("O:-)", R.drawable.emo_im_angel);
	    emoticons.put(":-*", R.drawable.emo_im_kissing);
	    emoticons.put(":*", R.drawable.emo_im_kissing);
	    emoticons.put(":-/", R.drawable.emo_im_undecided);
	    emoticons.put(":/ ", R.drawable.emo_im_undecided); // The space after is needed to avoid bad display of links
	    emoticons.put(":-\\", R.drawable.emo_im_undecided);
	    emoticons.put(":\\", R.drawable.emo_im_undecided);
	    emoticons.put(":-O", R.drawable.emo_im_surprised);
	    emoticons.put(":O", R.drawable.emo_im_surprised);
	    emoticons.put(":-@", R.drawable.emo_im_yelling);
	    emoticons.put(":@", R.drawable.emo_im_yelling);
	    emoticons.put("O.o", R.drawable.emo_im_wtf);
	    emoticons.put("o.O", R.drawable.emo_im_wtf);
	    emoticons.put(":'(", R.drawable.emo_im_crying);
	    emoticons.put("$.$", R.drawable.emo_im_money_mouth);
	}
	
	private RelativeLayout view;
	private ImageView statusView;
	
	public BubbleChat(Context context, int id, String message, Bitmap image, String time, boolean isIncoming, LinphoneChatMessage.State status, int previousID) {
		view = new RelativeLayout(context);
		
		LayoutParams layoutParams = new LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
    	
    	if (isIncoming) {
    		layoutParams.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
    		view.setBackgroundResource(R.drawable.chat_bubble_incoming);
    	}
    	else {
    		layoutParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
    		view.setBackgroundResource(R.drawable.chat_bubble_outgoing);
    	}
    	
    	if (previousID != -1) {
    		layoutParams.addRule(RelativeLayout.BELOW, previousID);
    	}

    	view.setId(id);
    	layoutParams.setMargins(0, LinphoneUtils.pixelsToDpi(context.getResources(), 10), 0, 0);
    	view.setLayoutParams(layoutParams);	
    	
    	Spanned text = null;
    	if (message != null) {
	    	if (context.getResources().getBoolean(R.bool.emoticons_in_messages)) {
	    		text = getSmiledText(context, getTextWithHttpLinks(message));
	    	} else {
	    		text = getTextWithHttpLinks(message);
	    	}
    	}
    	
    	if (context.getResources().getBoolean(R.bool.display_messages_time_and_status)) {
    		LinearLayout layout;
	    	if (context.getResources().getBoolean(R.bool.display_time_aside)) {
		    	if (isIncoming) {
		    		layout = (LinearLayout) LayoutInflater.from(context).inflate(R.layout.chat_bubble_alt_incoming, null);
		    	} else {
		    		layout = (LinearLayout) LayoutInflater.from(context).inflate(R.layout.chat_bubble_alt_outgoing, null);
		    	}
	    	} else {
	    		if (isIncoming) {
		    		layout = (LinearLayout) LayoutInflater.from(context).inflate(R.layout.chat_bubble_incoming, null);
		    	} else {
		    		layout = (LinearLayout) LayoutInflater.from(context).inflate(R.layout.chat_bubble_outgoing, null);
		    	}
	    	}
	    	
	    	TextView msgView = (TextView) layout.findViewById(R.id.message);
	    	if (message != null && msgView != null) {
		    	msgView.setText(text);
		    	msgView.setMovementMethod(LinkMovementMethod.getInstance());
	    	} else if (msgView != null) {
	    		msgView.setVisibility(View.GONE);
	    	}
	    	
	    	ImageView imageView = (ImageView) layout.findViewById(R.id.image);
	    	if (image != null && imageView != null) {
		    	imageView.setImageBitmap(image);
	    	} else if (imageView != null) {
	    		imageView.setVisibility(View.GONE);
	    	}
	    	
	    	TextView timeView = (TextView) layout.findViewById(R.id.time);
	    	timeView.setText(timestampToHumanDate(context, time));
	    	
	    	statusView = (ImageView) layout.findViewById(R.id.status);
	    	if (statusView != null) {
	    		if (status == LinphoneChatMessage.State.Delivered) {
	    			statusView.setImageResource(R.drawable.chat_message_delivered);
	    		} else if (status == LinphoneChatMessage.State.NotDelivered) {
	    			statusView.setImageResource(R.drawable.chat_message_not_delivered);
	    		} else {
	    			statusView.setImageResource(R.drawable.chat_message_inprogress);
	    		}
	    	}
	    	
	    	view.addView(layout);
    	} else {
    		TextView messageView = new TextView(context);
    		messageView.setId(id);
        	messageView.setTextColor(Color.BLACK);
        	messageView.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
        	messageView.setText(text);
        	messageView.setLinksClickable(true);
        	messageView.setMovementMethod(LinkMovementMethod.getInstance());
        	
        	view.addView(messageView);
    	}
	}
	
	public void updateStatusView(LinphoneChatMessage.State status) {
		if (statusView == null) {
			return;
		}
		
		if (status == LinphoneChatMessage.State.Delivered) {
			statusView.setImageResource(R.drawable.chat_message_delivered);
		} else if (status == LinphoneChatMessage.State.NotDelivered) {
			statusView.setImageResource(R.drawable.chat_message_not_delivered);
		} else {
			statusView.setImageResource(R.drawable.chat_message_inprogress);
		}
		view.invalidate();
	}
	
	public View getView() {
		return view;
	}
	
	private String timestampToHumanDate(Context context, String timestamp) {
		try {
			Calendar cal = Calendar.getInstance();
			cal.setTimeInMillis(Long.parseLong(timestamp));
			
			SimpleDateFormat dateFormat;
			if (isToday(cal)) {
				dateFormat = new SimpleDateFormat(context.getResources().getString(R.string.today_date_format));
			} else {
				dateFormat = new SimpleDateFormat(context.getResources().getString(R.string.messages_date_format));
			}
			
			return dateFormat.format(cal.getTime());
		} catch (NumberFormatException nfe) {
			return timestamp;
		}
	}
	
	private boolean isToday(Calendar cal) {
        return isSameDay(cal, Calendar.getInstance());
    }
	
	private boolean isSameDay(Calendar cal1, Calendar cal2) {
        if (cal1 == null || cal2 == null) {
            return false;
        }
        
        return (cal1.get(Calendar.ERA) == cal2.get(Calendar.ERA) &&
                cal1.get(Calendar.YEAR) == cal2.get(Calendar.YEAR) &&
                cal1.get(Calendar.DAY_OF_YEAR) == cal2.get(Calendar.DAY_OF_YEAR));
    }
	
	public static Spannable getSmiledText(Context context, Spanned text) {
		SpannableStringBuilder builder = new SpannableStringBuilder(text);
		int index;

		for (index = 0; index < builder.length(); index++) {
		    for (Entry<String, Integer> entry : emoticons.entrySet()) {
		        int length = entry.getKey().length();
		        if (index + length > builder.length())
		            continue;
		        if (builder.subSequence(index, index + length).toString().equals(entry.getKey())) {
		            builder.setSpan(new ImageSpan(context, entry.getValue()), index, index + length,
		            Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
		            index += length - 1;
		            break;
		        }
		    }
		}
		return builder;
	}
	
	public static Spanned getTextWithHttpLinks(String text) {
		if (text.contains("http://")) {
			int indexHttp = text.indexOf("http://");
			int indexFinHttp = text.indexOf(" ", indexHttp) == -1 ? text.length() : text.indexOf(" ", indexHttp);
			String link = text.substring(indexHttp, indexFinHttp);
			String linkWithoutScheme = link.replace("http://", "");
			text = text.replaceFirst(link, "<a href=\"" + link + "\">" + linkWithoutScheme + "</a>");
		}
		if (text.contains("https://")) {
			int indexHttp = text.indexOf("https://");
			int indexFinHttp = text.indexOf(" ", indexHttp) == -1 ? text.length() : text.indexOf(" ", indexHttp);
			String link = text.substring(indexHttp, indexFinHttp);
			String linkWithoutScheme = link.replace("https://", "");
			text = text.replaceFirst(link, "<a href=\"" + link + "\">" + linkWithoutScheme + "</a>");
		}
		
		return Html.fromHtml(text);
	}
}