<?php

declare(strict_types=1);

namespace App\Controllers;

use App\Core\I18n;
use App\Core\Locale;
use App\Core\View;

/**
 * Base controller — injects i18n globals (locale, t() helper, locale switcher)
 * into every render() call so views can use `$t('key')` and `$locale` directly.
 */
abstract class Controller
{
    protected View $view;

    public function __construct()
    {
        $this->view = new View();
    }

    /**
     * Render a view inside a layout.
     *
     * @param array<string,mixed> $data
     * @param string|null $forceLocale If set, overrides the locale resolved from
     *        cookie/Accept-Language for this render. Used by legal pages (Impressum,
     *        Datenschutz) that must be served in German only by German law.
     */
    protected function render(string $view, array $data = [], string $layout = 'main', ?string $forceLocale = null): void
    {
        $locale = $forceLocale ?? LocaleController::current();
        $i18n   = static fn (string $key, array $params = []): string => I18n::t($key, $params, $locale);

        $globals = [
            'locale'          => $locale,
            't'               => $i18n,
            'locale_switcher' => static function (string $currentPath) use ($locale): string {
                $switcher = new LocaleSwitcher($locale, $currentPath);
                return $switcher->render();
            },
        ];

        $merged = array_merge($globals, $data);

        foreach ($merged as $key => $value) {
            $this->view->assign($key, $value);
        }
        $this->view->render($view, $layout);
    }
}