package com.candidjava;

import java.io.IOException;
import javax.servlet.http.*;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;

public class Upadate extends HttpServlet {

	/**
	 *
	 */
	private static final long serialVersionUID = 99228212127307238L;

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

		String un=request.getParameter("username");
		String pw=request.getParameter("password");
		String conpw=request.getParameter("confirmpassword");
		// Connect to mysql and verify username password
		try {
			Class.forName("org.postgresql.Driver");// loads driver
			try(Connection c= DriverManager.getConnection("jdbc:postgresql://localhost:5432/testdb", "postgres", "admin")){// gets a new connection

//try with resource can be added here
			PreparedStatement ps = c.prepareStatement("select * from userdata where name=?");
			ps.setString(1, un);

		ResultSet rs = ps.executeQuery();

		if (rs.next()) {
			if(pw==conpw) {
				String sql="update userdata set password=? where name=?";
				try(PreparedStatement ps1 = c.prepareStatement(sql)){
				ps1.setString(1, pw);
				ps1.setString(2, un);
				ps1.executeUpdate();
				}
				catch(Exception e){
					System.out.println("some thing happend");
				}
			}
			else {
				PrintWriter out = response.getWriter();
				out.print("<font color=red>your password didnot match</font>");
				RequestDispatcher rd = request.getRequestDispatcher("update.html");
				rd.forward(request, response);
			}
		}
		else {
			PrintWriter out = response.getWriter();
			out.print("<font color=red>Please fill correct username</font>");
			RequestDispatcher rd = request.getRequestDispatcher("update.html");
			rd.forward(request, response);
		}
		}
			} catch (ClassNotFoundException | SQLException e) {
			 System.out.println("Unable to make connection with DB");
			e.printStackTrace();
		}
	}
}