package ur.grades;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.io.StreamCorruptedException;
import java.util.ArrayList;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.view.ContextMenu;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Toast;

public class Start extends Activity implements Serializable {
    private ListView listView;
    private ArrayList<String> lista = new ArrayList<String>();
    private ArrayList<String> cadeiras = new ArrayList<String>();
    private ArrayList<String> notas = new ArrayList<String>();
	private ArrayAdapter<String> adapter = null;
    private static String fich = "gravar.dat";
	EditText aux;
	LinearLayout dialerLayout;
	

	@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.listagem);
         listView = (ListView)findViewById(R.id.listView1);
        listView.setTextFilterEnabled(true);
        listView.setChoiceMode( 1);
        registerForContextMenu(listView);
       

        
        listView.setOnItemClickListener(new OnItemClickListener() {

            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
            	
            }

		
        });
    }

    @Override
	protected void onStart() {
    	
    	super.onStart();
    	 FileInputStream fin;
 		try {
 			fin = new FileInputStream(fich);
 	        ObjectInputStream in = new ObjectInputStream(fin);
 	    	carregar(in);

 		} catch (FileNotFoundException e) {
 			// TODO Auto-generated catch block
 			e.printStackTrace();
 		} catch (StreamCorruptedException e) {
 			// TODO Auto-generated catch block
 			e.printStackTrace();
 		} catch (IOException e) {
 			// TODO Auto-generated catch block
 			e.printStackTrace();
 		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
        adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, lista);
        listView.setAdapter(adapter);
        
    }
    
    
    @Override
	protected void onPause() {
		// TODO Auto-generated method stub
		super.onPause();
		
		 ObjectOutputStream out;
		   try {
			out = new ObjectOutputStream(new FileOutputStream(fich));
			gravar(out);
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	//Menu de contexto
    public void onCreateContextMenu(ContextMenu menu, View v,  
    		ContextMenuInfo menuInfo) {  
    		super.onCreateContextMenu(menu, v, menuInfo);  
    		
    		menu.setHeaderTitle("Opções");  
    		MenuInflater inflater = getMenuInflater();  
    		inflater.inflate(R.menu.menu, menu);  
    		}  
    
    //Ao criar a aplicação, cria o menu com as devidas opções.
    public boolean onCreateOptionsMenu(Menu menu) {  
    	MenuInflater inflater = getMenuInflater();  
    	inflater.inflate(R.menu.menu_principal, menu);  
    	return true;  
    	} 
    
    
  // O que fazer quando se clica num botão do Menu
    public boolean onOptionsItemSelected(MenuItem item) {  
    	switch (item.getItemId()) {  
    	case R.id.adicionar:  
    		//Toast.makeText(this, "This is the Toast message", Toast.LENGTH_LONG).show();
    		final AlertDialog.Builder alert = new AlertDialog.Builder(this);
    		final EditText input = new EditText(this);
    		
    		 LayoutInflater layoutInflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
             dialerLayout = (LinearLayout) layoutInflater.inflate(R.layout.input, null);
        	 LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT);
    		    dialerLayout.setLayoutParams(params);
    		
    		
    		alert.setView(dialerLayout);
    		
    		
    		
    		alert.setPositiveButton("Adicionar", new DialogInterface.OnClickListener() {
    			public void onClick(DialogInterface dialog, int whichButton) {
    				

    				aux = (EditText)dialerLayout.findViewById(R.id.cadeira);
    			
    				String value = aux.getText().toString();
    				aux = (EditText)dialerLayout.findViewById(R.id.nota);
    				int nota = Integer.parseInt(aux.getText().toString());
    				notas.add(String.valueOf(nota));
    				cadeiras.add(value);
    				String finalz = value+" : "+nota;
                 	lista.add(finalz);
    			 adapter.notifyDataSetChanged();
    			
    			}
    		
    		});

    		alert.setNegativeButton("Cancelar",
    				new DialogInterface.OnClickListener() {
    					public void onClick(DialogInterface dialog, int whichButton) {
    						dialog.cancel();
    					}
    				});
    		alert.show();

    		
    		
    	return true;  
    	
    	case R.id.media:
    		calcular_media();
    		return true;
    		
    	case R.id.gravar:
    		ObjectOutputStream out;
    		
    		   try {
    				out = new ObjectOutputStream(new FileOutputStream(fich));
    				gravar(out);
    				   Toast.makeText(getApplicationContext(), "nice!", Toast.LENGTH_LONG).show();

    			} catch (FileNotFoundException e) {
    				// TODO Auto-generated catch block
 				   Toast.makeText(getApplicationContext(), "error1!", Toast.LENGTH_LONG).show();

    				e.printStackTrace();
    			} catch (IOException e) {
  				   Toast.makeText(getApplicationContext(), "error2!", Toast.LENGTH_LONG).show();

    				e.printStackTrace();
    			}
    		return true;
    	default: return super.onOptionsItemSelected(item);  
    	}
    	}

	@Override
	public boolean onContextItemSelected(MenuItem item) {
		
		 AdapterView.AdapterContextMenuInfo contextMenuInfo = (AdapterView.AdapterContextMenuInfo)item.getMenuInfo();
		
		 if(item.getItemId()==R.id.item2){
				lista.remove(contextMenuInfo.position);
				notas.remove(contextMenuInfo.position);
				cadeiras.remove(contextMenuInfo.position);
				adapter.notifyDataSetChanged();
				
				return true;
				}
		 
		 return false;
	}  
	
	 public void calcular_media(){  

		 double contador=0;
		 double soma_notas=0;
		 double media=0;
		 for(int i=0;i<notas.size();i++){
			 contador++;
			 soma_notas+=Double.parseDouble(notas.get(i));
		 }
		 
		   media= (soma_notas)/(contador);
		   
		   Toast.makeText(getApplicationContext(), "Média = "+media, Toast.LENGTH_LONG).show();
	    } 
  
	  public void gravar(ObjectOutputStream out) throws IOException {
		  out.writeObject(lista);
		  out.writeObject(cadeiras);
		  out.writeObject(notas);
		  out.close();
	  }
	  
	public void carregar(ObjectInputStream in) throws IOException, ClassNotFoundException {
		 lista=(ArrayList<String>) in.readObject();
		 cadeiras=(ArrayList<String>) in.readObject();
		 notas= (ArrayList<String>) in.readObject();
		  in.close();
	  }
	  
	  
	
}