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();
      }



}