// REGISTER USER
if (isset($_POST['reg_user'])) {
	// receive all input values from the form
	$username = mysqli_real_escape_string($db, $_POST['username']);
	$password = mysqli_real_escape_string($db, $_POST['password']);
	$city = mysqli_real_escape_string($db, $_POST['city']);
	$state = mysqli_real_escape_string($db, $_POST['state']);
    $country = mysqli_real_escape_string($db, $_POST['country']);


	if (empty($username)) { array_push($errors, "Username is required"); }
	if (empty($password)) { array_push($errors, "Password is required"); }
	if (empty($city)) { array_push($errors, "City is required"); }
    if (empty($state)) { array_push($errors, "State is required"); }
    if (empty($country)) { array_push($errors, "Country is required"); }

	// register user
	if (count($errors) == 0) {
		$query = "INSERT INTO user (username, password, city, state, country)
				  VALUES('$username', '$password', '$city','$state','$country')";
		mysqli_query($db, $query);

		$_SESSION['username'] = $username;
		$_SESSION['success'] = "You Are now Logged In!";
		header('location: index.php');
	}

}

// LOG USER IN
if (isset($_POST['login_user'])) {
	$username = mysqli_real_escape_string($db, $_POST['username']);
	$password = mysqli_real_escape_string($db, $_POST['password']);

	if (empty($username)) {
		array_push($errors, "Username required");
	}
	if (empty($password)) {
		array_push($errors, "Password required");
	}

	if (count($errors) == 0) {
        $query = "SELECT * FROM userinfo WHERE username='$username' AND password='$password'";
        $results = mysqli_query($db, $query);

        if (mysqli_num_rows($results) == 1) {
            $_SESSION['username'] = $username;
            $_SESSION['success'] = "Welcome!";
            header('location: index.php');
        }else {
            array_push($errors, "Wrong username/password combination");
        }
    }
}

?>