package com.contentwatch.ghoti.cp;

import android.app.Notification;
import android.content.Context;
import android.util.DisplayMetrics;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.LinearLayout;
import android.widget.TextView;

///	A class for discovering Android Notification styles on Pre-Froyo (2.3) devices
///	@remarks	See http://stackoverflow.com/questions/4867338/custom-notification-layouts-and-text-colors/7320604#7320604
public class PreFroyoNotificationStyleDiscover {

	private Integer	mNotifyTextColor				= null;
	private float	mNotifyTextSize					= 11;
	private Integer	mNotifyTitleColor				= null;
	private float	mNotifyTitleSize				= 12;
	private final String TEXT_SEARCH_TEXT			= "SearchForText";
	private final String TEXT_SEARCH_TITLE			= "SearchForTitle";
	private Context mContext;
	
	PreFroyoNotificationStyleDiscover(Context context) {
		mContext = context;
		discoverStyle();
	}
	
	public int getTextColor() {
		return mNotifyTextColor.intValue();
	}
	
	public float getTextSize() {
		return mNotifyTextSize;
	}
	
	public int getTitleColor() {
		return mNotifyTitleColor;
	}
	
	public float getTitleSize() {
		return mNotifyTitleSize;
	}
	
	private boolean recurseGroup(ViewGroup group) {
		final int count = group.getChildCount();
		
		for (int i = 0; i < count; ++i) {
	        if(group.getChildAt(i) instanceof TextView) {
	            final TextView tv = (TextView)group.getChildAt(i);
	            final String text = tv.getText().toString();
	            if(text.startsWith("SearchFor")) {
	            	DisplayMetrics metrics = new DisplayMetrics();
	                WindowManager wm = (WindowManager)mContext.getSystemService(Context.WINDOW_SERVICE);
	                wm.getDefaultDisplay().getMetrics(metrics);
	                
	            	if(TEXT_SEARCH_TEXT == text) {
		            	mNotifyTextColor	= tv.getTextColors().getDefaultColor();
		            	mNotifyTextSize		= tv.getTextSize();
		            	mNotifyTextSize		/= metrics.scaledDensity;
	            	} else {
	            		mNotifyTitleColor	= tv.getTextColors().getDefaultColor();
	            		mNotifyTitleSize	= tv.getTextSize();
	            		mNotifyTitleSize	/= metrics.scaledDensity;
		            }
	                
	                if(null != mNotifyTitleColor && mNotifyTextColor != null) {
	                	return true;
	                }
	            }
	        } else if (group.getChildAt(i) instanceof ViewGroup) {
	        	if(recurseGroup((ViewGroup)group.getChildAt(i))) {
	        		return true;
	        	}
	        }
	    }
	    return false;
	}

	private void discoverStyle() {
		if(null != mNotifyTextColor) {
			//	already done
			return;
		}
		
		try {
			Notification notify = new Notification();
			notify.setLatestEventInfo(mContext, TEXT_SEARCH_TITLE, TEXT_SEARCH_TEXT, null);
	        LinearLayout group = new LinearLayout(mContext);
	        ViewGroup event = (ViewGroup)notify.contentView.apply(mContext, group);
	        recurseGroup(event);
	        group.removeAllViews();
		} catch (Exception e) {
			//	default to something
			mNotifyTextColor	= android.R.color.black;
			mNotifyTitleColor	= android.R.color.black;
		}
	}
}