/*
 * ComandoAlocarAlocacao.java
 *
 * Created on 13 de Junho de 2007, 09:54
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package app;

import dao.AlocacaoDAO;
import dao.TrabalhoDAO;
import java.io.IOException;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Vector;
import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.EntityTransaction;
import javax.persistence.Persistence;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import s3e.Alocacao;
import s3e.Intervalo;

/**
 *
 * @author tuvax
 */
public class ComandoAlocarAlocacao implements Comando {
    
    /** Creates a new instance of ComandoAlocarAlocacao */
    public ComandoAlocarAlocacao() {
    }
    
    
    public String executar(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String tituloEvento = request.getParameter("tituloEvento");
        String local = request.getParameter("local");
        DateFormat formatter = new SimpleDateFormat("dd/MM/yyyy hh:mm");
        
        Date horaInicio = null, horaFim = null;
        
        try {
            horaInicio = (Date) formatter.parse(request.getParameter("horaInicio"));
            horaFim = (Date)formatter.parse(request.getParameter("horaFim"));
        } catch (ParseException ex) {
            ex.printStackTrace();
            return "/WEB-INF/RetryAlocarLocalizacao.jsp";
        }
        
        boolean podeRegistrar = true;
        
        if(tituloEvento.equals("selecione..."))
            podeRegistrar = false;
        
        if(local.equals("selecione..."))
            podeRegistrar = false;
        
        try {
            horaInicio = (Date) formatter.parse(request.getParameter("horaInicio"));
            horaFim = (Date)formatter.parse(request.getParameter("horaFim"));
        } catch (ParseException ex) {
            ex.printStackTrace();
            return "/WEB-INF/Erro.jsp";
        }
        
        Intervalo novoIntervalo = new Intervalo();
        novoIntervalo.setHorarioInicio(horaInicio);
        novoIntervalo.setHorarioFim(horaFim);
        
        if (!verificarHorario(request,response, novoIntervalo)) {
            podeRegistrar = false;
        }
        
        if(podeRegistrar) {
            boolean r = TrabalhoDAO.getInstance().definirAlocacaoEvento(tituloEvento, local, novoIntervalo);
            if(r)
                return "/WEB-INF/ListarAlocacoes.jsp";
        }
        
        return "/WEB-INF/Erro.jsp";
    }
    
    public boolean verificarHorario(HttpServletRequest request, HttpServletResponse response, Intervalo novoIntervalo)
    throws ServletException, IOException{
        boolean verificarHorario = true;
        
        DateFormat formatter = new SimpleDateFormat("dd/MM/yyyy hh:mm");
        
        List<Alocacao> alocacoes = AlocacaoDAO.getInstance().obterAlocacoes();
        Iterator it = alocacoes.iterator();
        while (it.hasNext()) {
            Alocacao al = (Alocacao) it.next();
            if(al.getIntervalo().haIntersecao(novoIntervalo))
                return false;
        }
        
        if (novoIntervalo.getHorarioInicio().getTime() > novoIntervalo.getHorarioFim().getTime()){
            verificarHorario = false;
        }
        
        if (novoIntervalo.getHorarioInicio().equals("") || (novoIntervalo.getHorarioFim().equals(""))){
            verificarHorario = false;
        }
        
        return verificarHorario;
    }
    
    
    
}