package servlets;

import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class DetalhaLivroServlet extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
	    throws ServletException, IOException {
	response.setContentType("text/html;charset=UTF-8");
	PrintWriter out = response.getWriter();
	String livroid = request.getParameter("id");
	try {
	    // Configuracoes para a conexao
	    Class.forName("org.postgresql.Driver");
	    String url = "jdbc:postgresql://localhost/biblioteca";
	    String usuario = "postgres";
	    String senha = "nzrgrew7";
	    // Cria a conexao
	    Connection con = DriverManager.getConnection(url, usuario, senha);
	    // Cria o statement
	    Statement stat = con.createStatement();
	    // Consulta o livro escolhido pelo ID
	    ResultSet rs = stat.executeQuery("select titulo,autor,editora,genero,"
		    + "ano,preco,estoque,reserva from livros where livro_id="+livroid);
	    if(rs.next()){
	    out.println("Título: "+rs.getString(1));
	    out.println("Autor: "+rs.getString(2));
	    out.println("Editora: "+rs.getString(3));
	    out.println("Genero: "+rs.getString(4));
	    out.println("Ano: "+rs.getString(5));
	    out.println("Preço: "+rs.getString(6));
	    out.println("Estoque: "+rs.getString(7));
	    out.println("Reserva: "+rs.getString(8));}
	} catch (Exception ex) {
	    ex.printStackTrace();
	} finally {
	    out.close();
	}
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
	    throws ServletException, IOException {
	processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
	    throws ServletException, IOException {
	processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
	return "Short description";
    }// </editor-fold>
}