<?php
// Include config file
require_once("config.php");

$username = $password = "";
$username_err = $password_err = "";

// Processing form data when form is submitted
if($_SERVER["REQUEST_METHOD"] == "POST"){

    // Validate username
    if(empty(trim($_POST["username"]))){
        $username_err = "Nera vardo";
    } else{
        // Prepare a select statement
        $sql = "SELECT id FROM users WHERE username = :username";

        if($stmt = $pdo->prepare($sql)){
            // Bind variables to the prepared statement as parameters
            $stmt->bindParam(":username", $param_username, PDO::PARAM_STR);

            // Set parameters
            $param_username = trim($_POST["username"]);

            // Attempt to execute the prepared statement
            if($stmt->execute()){
                if($stmt->rowCount() == 1){
                    $username_err = "Vardas naudojamas.";
                } else{
                    $username = trim($_POST["username"]);
                }
            } else{
                echo "Oops! Something went wrong. Please try again later.";
            }
        }

        // Close statement
        unset($stmt);
    }

    // Validate password
    if(empty(trim($_POST["password"]))){
        $password_err = "No pass";
    } elseif(strlen(trim($_POST["password"])) < 6){
        $password_err = "Pass min 6 symbols";
    } else{
        $password = trim($_POST["password"]);
    }

    // Validate confirm password
    if(empty(trim($_POST["confirm_password"]))){
        $confirm_password_err = "Confirm pass";
    } else{
        $confirm_password = trim($_POST["confirm_password"]);
        if(empty($password_err) && ($password != $confirm_password)){
            $confirm_password_err = "Password did not match.";
        }
  }

    // Check input errors before inserting in database
    if(empty($username_err) && empty($password_err) && empty($confirm_password_err)){

        // Prepare an insert statement
        $sql = "INSERT INTO users (username, password) VALUES (:username, :password)";

        if($stmt = $pdo->prepare($sql)){
            // Bind variables to the prepared statement as parameters
            $stmt->bindParam(":username", $param_username, PDO::PARAM_STR);
            $stmt->bindParam(":password", $param_password, PDO::PARAM_STR);

            // Set parameters
            $param_username = $username;
            $param_password = password_hash($password, PASSWORD_DEFAULT); // Creates a password hash

            // Attempt to execute the prepared statement
            if($stmt->execute()){
                // Redirect to login page
               // header("location: login.php");
                echo "1";
            } else{
                echo "Something went wrong. Please try again later.";
            }
        }

        // Close statement
        unset($stmt);
    }
   echo $username_err;
   echo $password_err;
   echo $confirm_password_err;
    // Close connection
    unset($pdo);
}