/*
 * File: fileDialog.java
 * 		This file is part of Tico, an application to create and	perform
 * 		interactive communication boards to be used by people with
 * 		severe motor disabilities.
 * 
 * Author: Eduardo Ferrer
 * 
 * Date: Nov, 2011
 * 
 * Company: Universidad de Zaragoza, CPS, DIIS
 * 
 * License:
 * 		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 3
 * 		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, see <http://www.gnu.org/licenses/>. 
 */

package android.TICO;



import java.io.File;
import java.io.IOException;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.TransformerException;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.graphics.Color;
import android.media.AudioManager;
import android.os.Bundle;
import android.os.Environment;

import android.util.DisplayMetrics;

import android.view.Display;

import android.view.MotionEvent;

import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.Toast;

import android.widget.ScrollView;
import android.widget.TextView;

import configuration.TSetup;


/**
 * Defines the <code>fileDialog</code> activity, where we
 * can explore and open the Tico projects located in 
 * the Android device memory
 * @author Eduardo Ferrer
 * @version 1.0 Nov, 2011
 */
public class fileDialog extends Activity{
	private float SIZE;//=22.0f;
	
	File baseDir;
	File file;
	RelativeLayout marco;
	
	Button abrir;
	ScrollView scroll;
//	ScrollView scrollLandscape;
	LinearLayout botones;
	Display display;
	
	DisplayMetrics metrics=new DisplayMetrics();
	
	LinearLayout layoutFicheros;
	
	Resources res;
	

	
	/**
	 * Change the orientation of <code>fileDialog</code>
	 * when the orientation of the device changes.
	 */
	@Override
		public void onConfigurationChanged(Configuration newConfig) {
			super.onConfigurationChanged(newConfig);
		}
	        
	
	@Override    
	public void onCreate(Bundle savedInstanceState){
		super.onCreate(savedInstanceState);
		
		//configurar los botones fisicos de sonido al audio multimedia
        this.setVolumeControlStream(AudioManager.STREAM_MUSIC);
		
		res = getResources();
		SIZE=Float.parseFloat(res.getString(R.string.text_size_default));
		
		String InterpreterHomeURL=TSetup.getInterpreterHome();
		if(InterpreterHomeURL.length()>0){
			
			baseDir=new File(InterpreterHomeURL);
			
		}
		
		if(baseDir==null || !baseDir.exists() || !baseDir.canRead()){
			
			if(Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
				baseDir=Environment.getExternalStorageDirectory();
			}else{
				baseDir=Environment.getRootDirectory();
			}
			
		}
		
		marco=new RelativeLayout(this);
		gestor();
		
		
	}
	
	
	/**
	 * Manage the working of <code>fileDialog</code>
	 * for select a .tcoa file in the Android device memory
	 */
	public void gestor(){
		file=null;
		marco.removeAllViews();
		
		layoutFicheros=new LinearLayout(this);
		layoutFicheros.setOrientation(LinearLayout.VERTICAL);
		scroll=new ScrollView(this);
//		scrollLandscape=new ScrollView(this);
		display = ((WindowManager) getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
		
		display.getMetrics(metrics);

		ScrollView.LayoutParams panelSize;

		panelSize=new ScrollView.LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.WRAP_CONTENT);
    	scroll.setLayoutParams(panelSize);
    	layoutFicheros.setVerticalScrollBarEnabled(true);
    	layoutFicheros.computeScroll();
		
		final File ficheros[]=baseDir.listFiles();
		Quicksort(ficheros,0,ficheros.length-1);

		
		LinearLayout layoutDirectorioAtras=new LinearLayout(this);
		layoutDirectorioAtras.setOrientation(LinearLayout.HORIZONTAL);
		ImageView carpetaAtras=new ImageView(this);
		carpetaAtras.setImageResource(R.drawable.carpeta);
	
		LinearLayout.LayoutParams pcarpetaAtras = new LinearLayout.LayoutParams(2*(int)(SIZE/metrics.scaledDensity),2*(int)(SIZE/metrics.scaledDensity));
		pcarpetaAtras.setMargins(0, 2, 0, 2);
		carpetaAtras.setLayoutParams(pcarpetaAtras);
		layoutDirectorioAtras.addView(carpetaAtras);
		
		TextView atras=new TextView(this);
		atras.setTextSize(SIZE/metrics.scaledDensity);
		final String rutaAtras=baseDir.getParent();
		atras.setText(" ..");
		layoutDirectorioAtras.addView(atras);
		layoutFicheros.addView(layoutDirectorioAtras);
		layoutDirectorioAtras.setOnClickListener(new View.OnClickListener() {
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				if(rutaAtras!=null){
					baseDir=new File(rutaAtras);				
					gestor();
				}
				
			}
		});
		
		
		
		layoutDirectorioAtras.setFocusable(true);
		layoutDirectorioAtras.setOnFocusChangeListener(new View.OnFocusChangeListener() {
			
			@Override
			public void onFocusChange(View v, boolean hasFocus) {
				// TODO Auto-generated method stub
				
				if(hasFocus){
					abrir.setEnabled(false);  
					v.setBackgroundColor(Color.RED);
				}else{
					v.setBackgroundColor(Color.TRANSPARENT);
				}
				
			}
		});
		
		//separador
		LinearLayout separadorLayout=new LinearLayout(this);
		LinearLayout.LayoutParams pseparadorLayout=new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT,2);
		separadorLayout.setLayoutParams(pseparadorLayout);
		separadorLayout.setBackgroundColor(Color.WHITE);
		layoutFicheros.addView(separadorLayout);
		
		//mostramos las carpetas
		for(int i=0;i<ficheros.length;i++){
			if(ficheros[i].isDirectory()){
				LinearLayout layoutDirectorio=new LinearLayout(this);
				layoutDirectorio.setOrientation(LinearLayout.HORIZONTAL);
				ImageView carpetaImage=new ImageView(this);
				carpetaImage.setImageResource(R.drawable.carpeta);
				
			
				LinearLayout.LayoutParams pcarpetaImage = new LinearLayout.LayoutParams(2*(int)(SIZE/metrics.scaledDensity),2*(int)(SIZE/metrics.scaledDensity));
				pcarpetaImage.setMargins(0, 2, 0, 2);//margen de 2 pixeles entre esta imagen directorio y la anterior
				carpetaImage.setLayoutParams(pcarpetaImage);
				layoutDirectorio.addView(carpetaImage);
				
				final TextView nombreDir=new TextView(this);
				nombreDir.setTextSize(SIZE/metrics.scaledDensity);
				final String rutaDirectorio=ficheros[i].getAbsolutePath();
				nombreDir.setText(" "+ficheros[i].getName());
				
				layoutDirectorio.addView(nombreDir);
				
				layoutFicheros.addView(layoutDirectorio);
				layoutDirectorio.setOnClickListener(new View.OnClickListener() {
					@Override
					public void onClick(View v) {
						// TODO Auto-generated method stub
						File aux=new File(rutaDirectorio);
						if(aux.canRead()){
							baseDir=new File(rutaDirectorio);			
							gestor();
						}else Toast.makeText(getApplicationContext(), R.string.no_read_permission, Toast.LENGTH_SHORT).show();
					}
				});
				layoutDirectorio.setFocusable(true);
				layoutDirectorio.setOnFocusChangeListener(new View.OnFocusChangeListener() {
					
					@Override
					public void onFocusChange(View v, boolean hasFocus) {
						// TODO Auto-generated method stub
						if(hasFocus){
							abrir.setEnabled(false);  
							v.setBackgroundColor(Color.RED);
						}else{
							v.setBackgroundColor(Color.TRANSPARENT);
						}
						
					}
				});
				
				//separador
				separadorLayout=new LinearLayout(this);
				pseparadorLayout=new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT,2);
				separadorLayout.setLayoutParams(pseparadorLayout);
				separadorLayout.setBackgroundColor(Color.WHITE);
				layoutFicheros.addView(separadorLayout);
			}
		}
		
		
		//mostramos los ficheros
		for(int i=0;i<ficheros.length;i++){
			if(!ficheros[i].isDirectory() && ficheros[i].getName().toLowerCase().endsWith(".tcoa")){
				final LinearLayout layoutFichero=new LinearLayout(this);
				layoutFichero.setOrientation(LinearLayout.HORIZONTAL);
				ImageView ficheroImage=new ImageView(this);
				ficheroImage.setImageResource(R.drawable.icon);
			
				LinearLayout.LayoutParams pficheroImage = new LinearLayout.LayoutParams(2*(int)(SIZE/metrics.scaledDensity),2*(int)(SIZE/metrics.scaledDensity));
				pficheroImage.setMargins(0, 2, 0, 2);//margen de 2 pixeles entre esta imagen directorio y la anterior
				ficheroImage.setLayoutParams(pficheroImage);
				layoutFichero.addView(ficheroImage);
				
				final TextView nombreFich=new TextView(this);
				nombreFich.setTextSize(SIZE/metrics.scaledDensity);
				nombreFich.setText(" "+ficheros[i].getName());
				layoutFichero.addView(nombreFich);
				layoutFichero.setFocusableInTouchMode(true);
				
				layoutFicheros.addView(layoutFichero);
				
				
				final String rutaFichero=ficheros[i].getAbsolutePath();
				layoutFichero.setOnTouchListener(new View.OnTouchListener() {
					@Override
					public boolean onTouch(View v, MotionEvent event) {
						layoutFichero.requestFocus();
					
						return false;
					}
				}); 
			
				
				layoutFichero.setOnFocusChangeListener(new View.OnFocusChangeListener() {
					
					@Override
					public void onFocusChange(View v, boolean hasFocus) {
						// TODO Auto-generated method stub
						if(hasFocus){
							file=new File(rutaFichero);			
							abrir.setEnabled(true);  
							v.setBackgroundColor(Color.RED);
						}else{
							v.setBackgroundColor(Color.TRANSPARENT);
						}
						
					}
				});
				
				
				layoutFichero.setOnLongClickListener(new View.OnLongClickListener() {
					@Override
					public boolean onLongClick(View v) {
						abrir.performClick();
						return true;						
					}
				}); 
				
				//separador
				separadorLayout=new LinearLayout(this);
				pseparadorLayout=new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT,2);
				separadorLayout.setLayoutParams(pseparadorLayout);
				separadorLayout.setBackgroundColor(Color.WHITE);
				layoutFicheros.addView(separadorLayout);
			}
			
		}
		

		
	/*pricipio de bloque*/	
		scroll.addView(layoutFicheros);
			
		marco.addView(scroll);
		
		botones=new LinearLayout(this);
		Button cancelar=new Button(this);
		cancelar.setText(R.string.cancel);
		cancelar.setTextSize(SIZE/metrics.scaledDensity);
		
		cancelar.setFocusable(false);
		
		cancelar.setOnClickListener(new View.OnClickListener() {			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				finish();
				
			}
		});
		botones.addView(cancelar);
		
		abrir=new Button(this);
		abrir.setText(R.string.abrir);
		abrir.setTextSize(SIZE/metrics.scaledDensity);
		abrir.setEnabled(false);
		
		abrir.setFocusable(false);
		
		abrir.setOnClickListener(new View.OnClickListener() {			
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				if(file!=null){ 
					Intent resultIntent;

					resultIntent = new Intent();
					resultIntent.putExtra("fichero",file.getAbsolutePath());
					setResult(Activity.RESULT_OK, resultIntent);
					//guardamos el directorio en el archivo de configuracion para que sea el directorio por defecto
					TSetup.setInterpreterHome(file.getParent());
					try {
						TSetup.save(getApplicationContext());
					} catch (ParserConfigurationException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					} catch (IOException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					} catch (TransformerException e) {
						// TODO Auto-generated catch block
						e.printStackTrace();
					}
					
					finish();
				}
			}
		});
		botones.addView(abrir);
		
		
		
		/*fin de bloque*/
		
		
		marco.addView(botones);
		
		((android.widget.RelativeLayout.LayoutParams) botones.getLayoutParams()).addRule(RelativeLayout.ALIGN_PARENT_BOTTOM);
		
		setContentView(marco);
		
		botones.setId(1234); //asignamos a botones un identificador int para poder seleccionarlo para las reglas
		

		((android.widget.RelativeLayout.LayoutParams) scroll.getLayoutParams()).addRule(RelativeLayout.ABOVE,botones.getId());
		((android.widget.RelativeLayout.LayoutParams) scroll.getLayoutParams()).addRule(RelativeLayout.ALIGN_PARENT_TOP);
		marco.requestFocus();
		
	}
	

	//ordenacion de cadenas
	private int colocar(File v[], int b, int t){
	    int i;
	    int pivote;
	    String valor_pivote;
	    File temp;
	    
	 
	    pivote = b;
	    valor_pivote = v[pivote].getName();
	    for (i=b+1; i<=t; i++){
	        if (v[i].getName().compareToIgnoreCase(valor_pivote)<0){
	                 pivote++;    
	                temp=v[i];
	                v[i]=v[pivote];
	                v[pivote]=temp;
	 
	        }
	    }
	    temp=v[b];
	    v[b]=v[pivote];
	    v[pivote]=temp;
	    return pivote;
	} 
	 
	 
	 
	 
	 
	void Quicksort(File v[], int b, int t)
	{
	     int pivote;
	     if(b < t){
	        pivote=colocar(v, b, t);
	        Quicksort(v, b, pivote-1);
	        Quicksort(v, pivote+1, t);
	     }  
	}
	

}