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

/**
 *
 * @author Piotrek
 */
public class FirstPage 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");
        try (PrintWriter out = response.getWriter()) {
            /* TODO output your page here. You may use following sample code. */
            out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Biblioteka</title>");
            out.println("</head>");
            out.println("<body>");

        }
    }

    public void Rejestracja(HttpServletRequest request, HttpServletResponse response) throws IOException{
        PrintWriter out= response.getWriter();
        String login = request.getParameter("login");
        String haslo = request.getParameter("haslo");
        String imie = request.getParameter("imie");
        String nazwisko = request.getParameter("nazwisko");
        try {
            Class.forName("com.mysql.jdbc.Driver");
            Connection connect = DriverManager.getConnection("jdbc:mysql://localhost/biblioteka","root","");
            java.sql.PreparedStatement ps =
                    connect.prepareStatement("insert into uzytkownik values(?,?,?,?,?,0,\"nieaktywny\");");
            ps.setInt(1,0);
            ps.setString(2,login);
            ps.setString(3,haslo);
            ps.setString(4,imie);
            ps.setString(5,nazwisko);

            int result = ps.executeUpdate();
            if(result>0)
                out.print("Rejestracja zakonczona pomyślnie, czekaj na zatwierdzenie przez administratora...");

        }catch(Exception e2){
            System.out.println(e2);
        }
        /*String form = "";
        form += "<form action =\"FirstPage\" method= 'post'>";
        form += "Login:<input type=\"text\" name=\"login\"/><br/>";
        form += "Haslo:<input type=\"password\" name=\"haslo\"/><br/>";
        form += "Imie:<input type=\"text\" name=\"imie\"/><br/>";
        form += "Nazwisko:<input type=\"text\" name=\"nazwisko\"/><br/>";
        form += "<input type=\"submit\" value=\"Zarejestruj\"/>";
        form += "</form>";
        form += "</body></html>";
        out.println(form);*/
        //out.close();

    }

    public void Logowanie(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException{
        HttpSession ses = request.getSession();

        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        out.println(ses.getAttribute("zalogowany"));
        //processRequest(request,response);

        boolean status = false;
        String l = request.getParameter("login");
        String h = request.getParameter("haslo");


        try {
            Class.forName("com.mysql.jdbc.Driver");
            Connection connect = DriverManager.getConnection("jdbc:mysql://localhost/biblioteka","root","");
            java.sql.PreparedStatement ps =
                    connect.prepareStatement("Select * from uzytkownik where login = ? and haslo = ? ;");
            ps.setString(1,l);
            ps.setString(2,h);

            ResultSet rs = null;
            rs = ps.executeQuery();
            status=rs.next();
        }catch(Exception e2){
            System.out.println(e2);
        }
        if(status){

            ses.setAttribute("zalogowany", "tak");
            System.out.println("jesteś zalogowany chuju");
            ServletContext context = getServletContext();
            RequestDispatcher rd=context.getRequestDispatcher("/WEB-INF/logowanie.html");//na tego htmla tymczasowo - do zmiany
            rd.forward(request, response);
          //processRequest(request, response);
        }

        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);
        PrintWriter out= response.getWriter();
        out.println("<!DOCTYPE html>");
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Biblioteka</title>");
            out.println("</head>");
            out.println("<body>");
        String form = "";
        form += "<form action =\"FirstPage\" method= 'post'>";
        form += "Login:<input type=\"text\" name=\"login\"/><br/>";
        form += "Haslo:<input type=\"password\" name=\"haslo\"/><br/>";
        form += "Imie:<input type=\"text\" name=\"imie\"/><br/>";
        form += "Nazwisko:<input type=\"text\" name=\"nazwisko\"/><br/>";
        form += "<input type=\"submit\" value=\"Zarejestruj\"/>";
        form += "</form>";
        form += "<form action=\"FirstPage\" method=\"post\">";
        form += "Login:<input type=\"text\" name=\"login\"/><br/>";
        form += "Haslo:<input type=\"password\" name=\"haslo\"/><br/>";
        form += "<input type=\"submit\" value=\"Zaloguj\"/>";
        form += "</form>";
        form += "</body></html>";
        out.println(form);
    }

    /**
     * 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 {
       Rejestracja(request, response);
       Logowanie(request, response);
    }

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

}