<?php

namespace app\models;

use app\core\AuthInterface;
use app\exceptions\GenericErrorException;
use app\exceptions\UserAlreadyExistsException;
use Exception;
use mysqli;

class RegisterModel implements AuthInterface
{
    private ?mysqli $conn = NULL;
    private array $config;

    public function __construct()
    {
        $this->config = $_SESSION['database_configuration'];
    }

    /**
     * @throws GenericErrorException
     */
    public function createConnection(): void
    {
        try {
            $this->conn = new mysqli($this->config['dsn'], $this->config['user'], $this->config['password'], $this->config['dbname']);
        } catch (Exception){
            throw new GenericErrorException();
        }
    }

    /**
     * @throws UserAlreadyExistsException
     */
    public function executeReq(array $body): int|string
    {
        $username = $body["username"];
        $email = $body["email"];
        $password = $body["password"];

        $query = "SELECT * FROM Users WHERE email = '$email'";
        $result = $this->conn->query($query);
        if($result->num_rows) throw new UserAlreadyExistsException();

        $query = "INSERT INTO Users (username, email, password) VALUES ('$username', '$email', '$password')";
        $result = $this->conn->query($query);

        return "Success";
    }
}