<?php

declare(strict_types=1);

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $inputs = ["username"=>$_POST["username"],"pwd"=>$_POST["pwd"]];
    
    try {
        require_once "dbh.inc.php";
        require_once "register_model.inc.php";
        require_once "register_view.inc.php";
        require_once "register_contr.inc.php";

        // Error handlers
        $errors = [];
        if (isEmpty($inputs)) {
            $errors = ["null_field" => "Form contains blank characters."];
        }
        if (username_taken($pdo, $inputs["username"])) {
            $errors = ["username_taken" => "Username alredy taken"];
        }

        require_once "config_session.inc.php";

        if ($errors) {
            $_SESSION["errors"] = $errors;

            // Send back form
            $entered_data = [
                "username" => $inputs["username"]
            ];

            $_SESSION["entered_register_data"] = $entered_data;

            header("Location: ../chat.php");
            $inputs = null;
            die();
        }

        user_register($pdo, $inputs["username"], $inputs["pwd"]);

        header("Location: ../chat.php");
        $inputs = null;
        die();
    } catch (PDOException $e) {
        echo "An error has ocurred: " . $e->getMessage();
        exit();
    }
    
} else {
    echo "Wrong request type, please check your request.";
    exit();
}