<?php

namespace app\models;

use app\core\AuthInterface;
use app\exceptions\GenericErrorException;
use app\exceptions\UserNotExistingException;
use Exception;
use mysqli;

class LoginModel 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 UserNotExistingException
     */
    public function executeReq(array $body): int|string
    {
        $email = $body["email"];
        $password = $body["password"];

        $query = "SELECT id FROM Users WHERE email = '$email' AND password = '$password'";
        $result = $this->conn->query($query);
        if(!$result->num_rows) throw new UserNotExistingException();

        $row = mysqli_fetch_row($result);
        return $row[0];
    }
}