<?php

namespace App\Core;

class Response
{
    private string $content = '';
    private int $statusCode = 200;
    private array $headers = [];
    private string $contentType = 'text/html; charset=utf-8';

    public function setContent(string $content): self
    {
        $this->content = $content;
        return $this;
    }

    public function getContent(): string
    {
        return $this->content;
    }

    public function setStatusCode(int $statusCode): self
    {
        $this->statusCode = $statusCode;
        return $this;
    }

    public function getStatusCode(): int
    {
        return $this->statusCode;
    }

    public function setHeader(string $name, string $value): self
    {
        $this->headers[$name] = $value;
        return $this;
    }

    public function setHeaders(array $headers): self
    {
        $this->headers = array_merge($this->headers, $headers);
        return $this;
    }

    public function getHeaders(): array
    {
        return $this->headers;
    }

    public function setContentType(string $contentType): self
    {
        $this->contentType = $contentType;
        return $this;
    }

    public function getContentType(): string
    {
        return $this->contentType;
    }

    public function redirect(string $url, int $statusCode = 302): self
    {
        $this->setHeader('Location', $url);
        $this->setStatusCode($statusCode);
        return $this;
    }

    public function json(array $data, int $statusCode = 200): self
    {
        $this->setContentType('application/json');
        $this->setContent(json_encode($data, JSON_UNESCAPED_UNICODE));
        $this->setStatusCode($statusCode);
        return $this;
    }

    public function download(string $filePath, string $filename = null): self
    {
        if (!file_exists($filePath)) {
            throw new \Exception('File not found: ' . $filePath);
        }

        $filename = $filename ?: basename($filePath);
        $mimeType = mime_content_type($filePath) ?: 'application/octet-stream';

        $this->setHeader('Content-Type', $mimeType);
        $this->setHeader('Content-Disposition', 'attachment; filename="' . $filename . '"');
        $this->setHeader('Content-Length', (string) filesize($filePath));
        $this->setHeader('Cache-Control', 'no-cache, must-revalidate');
        $this->setHeader('Pragma', 'no-cache');

        $this->setContent(file_get_contents($filePath));
        return $this;
    }

    public function send(): void
    {
        // Set status code
        http_response_code($this->statusCode);

        // Set content type
        header('Content-Type: ' . $this->contentType);

        // Set additional headers
        foreach ($this->headers as $name => $value) {
            header($name . ': ' . $value);
        }

        // Output content
        echo $this->content;
        exit;
    }

    public function notFound(string $message = 'Seite nicht gefunden'): self
    {
        $this->setStatusCode(404);
        $this->setContent($message);
        return $this;
    }

    public function forbidden(string $message = 'Zugriff verweigert'): self
    {
        $this->setStatusCode(403);
        $this->setContent($message);
        return $this;
    }

    public function unauthorized(string $message = 'Nicht autorisiert'): self
    {
        $this->setStatusCode(401);
        $this->setContent($message);
        return $this;
    }

    public function serverError(string $message = 'Interner Serverfehler'): self
    {
        $this->setStatusCode(500);
        $this->setContent($message);
        return $this;
    }
}