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<?php
    require "./dbconnect.php";  // Establishes connection to database
    if ($_SERVER['REQUEST_METHOD'] === 'POST') {
        if (isset($_POST["username"])) {
            $exists = false;
            $user = $_POST["username"];   // username input in form
            $pass = $_POST["password"];   // password input in form
            $cpass = $_POST["cpassword"];  // confirm password input in form
            $db_check = "SELECT * FROM `users`.`userdata` WHERE `username` = $user";
            $result1 = $conn->query($db_check);   // THIS IS NOT WORKING, IDK WHY !!!!!????
            
            // debugging statements below -->
            
            if(!$result1){
                echo "check";     // Does not get printed
            }
            var_dump $result1;  // Still, nothing printed here
            
            // further below, nothing is executed.
            
            if($result1->num_rows > 0){
                $exists = true;
            }

            if (($pass == $cpass) && (!$exists)) {
                $sql_insert = "INSERT INTO `users`.`userdata` (`username`, `password`) VALUES ('$user', '$pass')";
                $result2 = $conn->query($sql_insert);
                if (!$result2) {
                    $alert = "db_error";
                    require './alerts.php';  // if executed, will print error alert corresponding to db_error
                } else {
                    $alert = "account_created";
                    require './alerts.php'; //if executed, will print success alert corresponding to account_created
                }
            } elseif ($pass != $cpass) {
                $alert = "pass_not_match";
                require './alerts.php';  // if executed, will print error alert corresponding to pass_not_match
            } elseif ($exists) {
                $alert = "user_exists";
                require './alerts.php';  // if executed, will print error alert corresponding to user_exists
            }
        }
    }
?>