<?php
declare(strict_types=1);

namespace Phred\Mvc;

use Nyholm\Psr7\Factory\Psr17Factory;
use Psr\Http\Message\ResponseInterface;

abstract class ViewController extends Controller
{
    private Psr17Factory $psr17;

    public function __construct()
    {
        $this->psr17 = new Psr17Factory();
    }

    /**
        * Return an HTML response with the provided content.
        */
    protected function html(string $content, int $status = 200, array $headers = []): ResponseInterface
    {
        $response = $this->psr17->createResponse($status)->withHeader('Content-Type', 'text/html; charset=utf-8');
        foreach ($headers as $k => $v) {
            $response = $response->withHeader((string) $k, (string) $v);
        }
        $response->getBody()->write($content);
        return $response;
    }

    /**
     * Convenience to render a module View and return an HTML response.
     * The `$template` is optional; when omitted (null), the view should use its default template.
     */
    protected function renderView(View $view, array $data = [], ?string $template = null, int $status = 200, array $headers = []): ResponseInterface
    {
        // Delegate template selection to the View; when $template is null,
        // the View may use its default template.
        $markup = $view->render($data, $template);
        return $this->html($markup, $status, $headers);
    }
}