<?php
declare(strict_types=1);

namespace Phred\Mvc;

use Phred\Template\Contracts\RendererInterface;

abstract class View implements ViewWithDefaultTemplate
{
    protected string $template = '';

    public function __construct(protected RendererInterface $renderer) {}

    /**
     * Prepare data for the template. Subclasses may override to massage input.
     */
    protected function transformData(array $data): array
    {
        return $data;
    }

    /**
     * Render using transformed data and either the provided template override or the default template.
     */
    public function render(array $data = [], ?string $template = null): string
    {
        $prepared = $this->transformData($data);
        $tpl = $template ?? $this->defaultTemplate();
        return $this->renderer->render($tpl, $prepared);
    }

    public function defaultTemplate(): string
    {
        return $this->template;
    }
}