<?php
namespace app\core;

use app\exceptions\InvalidAuthTokenException;
use app\exceptions\InvalidBodyException;
use app\exceptions\InvalidRequestException;
use app\exceptions\InvalidAuthRequestException;

use app\models\LoginModel;
use app\models\RegisterModel;
use Exception;

class Controller
{
    private string $method;
    private ?array $body;
    private ?string $token;
    private ?string $authRequest;

    public function __construct(string $method, ?string $authRequest, ?array $body, ?string $token)
    {
        $this->method = $method;
        $this->body = $body;
        $this->authRequest = $authRequest;
        $this->token = $token;
    }

    public function run(): void
    {
        try {
            if (!$this->isTokenValid()) throw new InvalidAuthTokenException();
            if (!$this->isAuthRequestValid()) throw new InvalidAuthRequestException();
            if (!$this->body) throw new InvalidBodyException();

            $model = match ($this->method) {
                'GET' => new LoginModel(),
                'PUT' => new RegisterModel(),
                default => throw new InvalidRequestException(),
            };

            $model->createConnection();
            $result = $model->executeReq($this->body);

            $this->writeResponse(
                DVC::getHttpCodeWithCode(DVC::$successReturnCode),
                DVC::$successReturnCode, $result
            );

        } catch (Exception $e){
            $this->writeResponse(DVC::getHttpCodeWithCode($e->getCode()),
                $e->getCode(), $e->getMessage()
            );
        }
    }

    private function isTokenValid(): bool
    {
        $validToken = hash('md5', 'service_authentication');
        return $validToken === $this->token;
    }

    private function isAuthRequestValid(): bool
    {
        return match ($this->authRequest){
            "register", "login" => true,
            default => false
        };
    }

    private function writeResponse(int $httpCode, int $returnCode, string|array $returnMessage): void
    {
        header("Content-Disposition: ".DVC::$nameOfResponsePackage);
        header("Content-Type: application/json");
        http_response_code($httpCode);
        echo json_encode([
            "code" => $returnCode,
            "message" => $returnMessage
        ]);
    }
}