package ve.gob.cenditel.tibisaymovil;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import ve.gob.cenditel.tibisaymovil.R;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnClickListener;
import android.view.Window;
import android.webkit.MimeTypeMap;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.RadioButton;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Toast;

public class FileToSignHandwrittenSignatureActivity extends Activity implements OnItemClickListener, OnClickListener {

	private File cwd;
    private File selected;
    private FileBrowserView viewHolder;
    private FileListAdapter listAdapter;
    private String filterMImeType = "application/pdf";

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		//Estilando la barra de titulo
		final boolean customTitleSupported = requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);

		super.onCreate(savedInstanceState);
		
		this.viewHolder = new FileBrowserView();	

        if (savedInstanceState != null) {
        	if(savedInstanceState.getString("selected") != null)
        		this.selected = new File(savedInstanceState.getString("selected"));

            if (this.selected != null) {
            	
            	FileToSignHandwrittenSignatureActivity.this.updateButton
            	(FileToSignHandwrittenSignatureActivity.this.viewHolder.accept,true);

            }
            
            this.cwd = new File(savedInstanceState.getString("cwd"));
            this.viewHolder.fileList.setAdapter(this.listAdapter = new FileListAdapter(this.cwd.getAbsolutePath(), filterMImeType));
            
        } else {
            this.selected = null;
            this.viewHolder.fileList.setAdapter(this.listAdapter = new FileListAdapter());
        }
        
        
        boolean enabled = false;
        if (this.selected != null)
        	enabled = this.viewHolder.accept.isEnabled();
        
        FileToSignHandwrittenSignatureActivity.this.updateButton
        (FileToSignHandwrittenSignatureActivity.this.viewHolder.accept,enabled);
        
        //Estilando Barra de titulo
		if(customTitleSupported)
			getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.title_bar);
	}

	
    /**
     * Provides the data to be shown in the file browser ListView.
     *
     * @author José M. Prieto (jmprieto@emergya.com)
     */
    private class FileListAdapter extends BaseAdapter {

        private final ArrayList<File> directories;
        private final ArrayList<File> files;

        private FileListAdapter() {
            this("/",filterMImeType);
        }

        private FileListAdapter(String location) {
            this(location, "");
        }
        
        private FileListAdapter(String location, String filterMimeType) {
        	
            directories = new ArrayList<File>();
            files = new ArrayList<File>();
            
            //Obtiene etiqueta que se colocará antes del path que visualizará el usuario
        	String toPathText = FileToSignHandwrittenSignatureActivity.this.getString(R.string.pathstring)+":   ";
        	//Coloca el texto de la etiqueta en la vista
        	FileToSignHandwrittenSignatureActivity.this.viewHolder.pathString.setText(toPathText);
        	//Coloca el texto con el path actual
        	FileToSignHandwrittenSignatureActivity.this.viewHolder.path.setText(location);
        	//Crea un objeto file cwd con la ubicacion dada en location
            FileToSignHandwrittenSignatureActivity.this.cwd = new File(location);
            //Obtiene el directorio padre del objeto file cwd
            File parent = FileToSignHandwrittenSignatureActivity.this.cwd.getParentFile();
            //Si tiene un padre, lo agrega en la posición cero de la lista de directorios  
            
            if (parent != null) {
                directories.add(0, parent);
            }
            
            //Crea un arreglo con las lista de archivos contenidos en el directorio cwd
            File[] ls = FileToSignHandwrittenSignatureActivity.this.cwd.listFiles();
            if (ls != null) {
                for (File f : ls) { //recorre todos los archivos contenidos en el directorio
                	
                    if (FsUtils.isHiddenOrNotReadable(f)) { // Si son ocultos no hace nada
                        continue;
                    }
                  // Si son directorios los agrega a la lista de directorios a partir de la posición 1
                  // En la posición 0 se encuentra el directorio padre  
                    if (f.isDirectory()) {
                        directories.add(f);
                    } else // De lo contrario lo agrega a la lista de archivos 
                    	{
                    	//Valida tipo de archivo a mostrar
                        Uri selectedUri = Uri.fromFile(f);
                        String fileExtension = MimeTypeMap.getFileExtensionFromUrl(selectedUri.toString());
                        String mimeType = MimeTypeMap.getSingleton().getMimeTypeFromExtension(fileExtension);
                          
//                        Toast.makeText(FileToSignHandwrittenSignatureActivity.this,
//                          "FileExtension: " + fileExtension + "\n" +
//                          "MimeType: " + mimeType,
//                          Toast.LENGTH_LONG).show();
                        
                        //Filtra por mimeType
                        if(filterMimeType.isEmpty() || filterMimeType == mimeType)
                            files.add(f);
                        	
                    }
                }
            }

            Collections.sort(directories); // Ordena los directorios alfabeticamente
            Collections.sort(files); // Ordena los archivos alfabeticamente
        }
       
        /**
         * Retorna cantidad total de elementos que se listarán en el directorio.
         */
        @Override 
        public int getCount() {
        	
            return directories.size() + files.size();
            
        }

        /**
         * Dada una posición en el listado del directorio, retorna un archivo o directorio
         * según corresponda.
         */
        @Override
        public File getItem(int position) {

            if (position < directories.size()) {
                return directories.get(position);
            } else {
                return files.get(position - directories.size());
            }
        }

        /**
         * Retorna un código hash para el archivo, permite comparar si dos archivos son los mismos
         */
        @Override
        public long getItemId(int position) {

            return getItem(position).hashCode();
        }
        
        /**
         * Crea la visualización de cada item del fileBrowser
         */
        @Override
        public View getView(int position, View convertView, ViewGroup parent) {

        	//Crea la vista de cada fila del filebrowser a partir del layout
            if (convertView == null) {
                LayoutInflater inflater = LayoutInflater.from(FileToSignHandwrittenSignatureActivity.this);
                convertView = inflater.inflate(R.layout.file_to_sign_handwritten_signature_item, parent, false); 
            }
            
            // Se enlaza a cada componente del layout 
            ImageView image = (ImageView) convertView.findViewById(R.id.type_image);
            TextView fileName = (TextView) convertView.findViewById(R.id.filename_text);
            TextView modified = (TextView) convertView.findViewById(R.id.filename_modified);
            
            // Se obtiene el archivo ubicado en position
        	File file = getItem(position);
        	
        	//RadioButton
            RadioButton radio = (RadioButton) convertView.findViewById(R.id.file_radio);
            radio.setFocusable(false);
            
            // Se asignan los iconos según el tipo de archivo y se oculta el radio en los directorios
            if (file.isDirectory()) {
                image.setImageResource(R.drawable.ic_carpeta);
                radio.setVisibility(View.INVISIBLE);
                radio.setChecked(false);
            } else {
                image.setImageResource(R.drawable.ic_archivo);
                radio.setVisibility(View.VISIBLE);
                
                if (FileToSignHandwrittenSignatureActivity.this.selected == null ||
	            	FileToSignHandwrittenSignatureActivity.this.selected.hashCode() != file.hashCode()){
	            		radio.setChecked(false);
            	} else{
            		radio.setChecked(true);
            	}         
            }

            // Si es el directorio que hace referencia al padre le coloca como nombre ".."
            if (file.isDirectory() && position == 0 && ! "/".equals(FileToSignHandwrittenSignatureActivity.this.cwd.getAbsolutePath())) {
                fileName.setText("..");
            } else {
                fileName.setText(file.getName());
            }
 
            
            //Datos de modificación del archivo
            SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
            Date date = new Date(file.lastModified());
            
            String dateString = FileToSignHandwrittenSignatureActivity.this.getString(R.string.modified)+": ";
            if (file.lastModified()>0)
            	modified.setText(dateString+sdf.format(date));
            else
            	modified.setText(dateString+"-");
            
            return convertView;
        }
        
        /**
         * Controla la selección de cada item del fileBrowser
         */
        public void select(ListView parent, int position) {

            File item = getItem(position);
            //Si es un directorio el seleccionado se hace un llamado del fileBrowser del directorio
            if (item.isDirectory()) {
                parent.setAdapter(FileToSignHandwrittenSignatureActivity.this.listAdapter = new FileListAdapter(item.getAbsolutePath(), filterMImeType));
            } else { // Si es un archivo
            	
        		//Se agrega el archivo a la lista de seleccionados si no se encuentra en la misma            	
            	if (FileToSignHandwrittenSignatureActivity.this.selected == null || 
            		FileToSignHandwrittenSignatureActivity.this.selected.hashCode() != item.hashCode()){
            		
            		FileToSignHandwrittenSignatureActivity.this.selected = item;
            		
            		FileToSignHandwrittenSignatureActivity.this.updateButton(FileToSignHandwrittenSignatureActivity.this.viewHolder.accept,true);  		
            		            		
            	}
            	else{ // De lo contrario se elimina de la lista de seleccionados
                	
            		FileToSignHandwrittenSignatureActivity.this.selected = null;             		
                	FileToSignHandwrittenSignatureActivity.this.updateButton(FileToSignHandwrittenSignatureActivity.this.viewHolder.accept,false);
                	               	
                }
                notifyDataSetChanged();
           }
        }       
    }    


    
    
    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);

        outState.putParcelable("intent", this.getIntent());
        outState.putString("cwd", this.cwd.getAbsolutePath());
        if(this.selected != null)
        	outState.putString("selected", this.selected.getAbsolutePath());
        
        }
    
    private void updateButton(View v, boolean bool) {
    	try{

        	v.setEnabled(bool);
        	if (v instanceof TextView){
        		Drawable icon = ((TextView)v).getCompoundDrawables()[1];
        		if (icon!=null)
        		if (bool)
        	   		icon.setAlpha(255);
        	   	else
        	   		icon.setAlpha(127);	
        	}
        	if (v instanceof ImageView){
        		ImageView result = (ImageView) v;
        		if (bool)
        			result.setAlpha(255);
        	   	else
        	   		result.setAlpha(127);	
        	}
        
    	}catch(NullPointerException e){}
	   		
	}
    
    private void updateButton(LinearLayout layout, boolean bool) {
    	try{
    	layout.setEnabled(bool);
        for (int i=0; i<layout.getChildCount();i++){
        	this.updateButton(layout.getChildAt(i), bool);
        }
    	}catch(NullPointerException e){}
	   		
	}

	
	
	/**
     * Holds references to view objects.
     *
     * @author José M. Prieto (jmprieto@emergya.com)
     */
    private class FileBrowserView {

        public ListView fileList;
        public TextView path;
        public LinearLayout accept;
		public LinearLayout clear;
        public TextView pathString;

        public FileBrowserView() {

            setContentView(R.layout.activity_file_to_sign_handwritten_signature);
            this.path = (TextView) findViewById(R.id.path);
            this.pathString = (TextView) findViewById(R.id.pathstring);

            this.fileList = (ListView) findViewById(R.id.file_list);
            this.fileList.setOnItemClickListener(FileToSignHandwrittenSignatureActivity.this);
            this.fileList.setItemsCanFocus(true);
         
            
            this.clear = (LinearLayout) findViewById(R.id.button_clear_zone);
            this.clear.setOnClickListener(FileToSignHandwrittenSignatureActivity.this);
            
            this.accept = (LinearLayout) findViewById(R.id.button_accept_zone);
            this.accept.setOnClickListener(FileToSignHandwrittenSignatureActivity.this);

        }
    }
    
	@Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
    	
    	
        if (parent.getId() == R.id.file_list) { // user selects a file
            this.listAdapter.select((ListView) parent, position);
            
        } else { // user de-selects a file
            //this.listAdapter.addIfSameDirectory(selectedAdapter.doUnselect((ListView) parent, position));
        	
        }
        //this.viewHolder.numSelected.setText(Integer.toString(this.selected.size()));
    }

    @Override
    public void onClick(View v) {

        switch (v.getId()) {

        
        case R.id.button_clear_zone:
        	
        	this.selected = null;
        	this.listAdapter.notifyDataSetChanged();

        	//this.viewHolder.numSelected.setText(""+this.selected.size());
            this.updateButton(this.viewHolder.accept, false);
        	break;        	
        

        
	    case R.id.button_accept_zone:
	    	
			//Crear dialogo de opciones para firmar
			final AlertDialog image_dialog = selectImageOptionsDialog();
			image_dialog.show();
            
	    	break;        	
    	
        }
    }
    
	
	//Crea dialogo de opciones para seleccion de imagen de firma
	public AlertDialog selectImageOptionsDialog() {
		final String[] option = new String[] {getString(R.string.firmar_man_capt_img), getString(R.string.firmar_man_exist_img), getString(R.string.firmar_man_prefer_img) };
		ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
		        android.R.layout.select_dialog_item, option);
		AlertDialog.Builder builder = new AlertDialog.Builder(this);
		
		builder.setTitle(getString(R.string.seleccione_opcion_firmar_man_img));
		builder.setAdapter(adapter, new DialogInterface.OnClickListener() {
		
		  public void onClick(DialogInterface dialog, int which) {
			  
			  switch (which) {
			case 0: // Capturar imágen
				Intent intent = new Intent(FileToSignHandwrittenSignatureActivity.this, CaptureImgHandwrittenSignatureActivity.class);
	            intent.putExtra("FILE_TO_SIGN", FileToSignHandwrittenSignatureActivity.this.selected.getAbsolutePath());
	            Log.i("DEBUG",  FileToSignHandwrittenSignatureActivity.this.selected.getAbsolutePath());
	            startActivity(intent);
				
				break;
			case 1: // Buscar en archivos
				Intent intent1 = new Intent(FileToSignHandwrittenSignatureActivity.this, SelectImgHandwrittenSignatureActivity.class);
	            intent1.putExtra("FILE_TO_SIGN", FileToSignHandwrittenSignatureActivity.this.selected.getAbsolutePath());
	            startActivity(intent1);
				
				break;
			case 2: // Usar predeterminada
				
				break;

			default:
				break;
			}
		  }
		  
		});	
		
		return builder.create();
	}

}