<?php

declare(strict_types=1);

class PostController extends BaseController
{
    private const MEDIA_PICKER_LIMIT = 60;

    public function beforeRoute(): void
    {
        $this->requireAuth();
        $this->disableCache();
    }

    public function create(): void
    {
        $this->renderForm('Nouvel article', $this->f3->alias('post_store'), Post::emptyForm());
    }

    public function store(): void
    {
        $this->verifyCsrf();

        $input = $this->postInput();

        try {
            (new Post($this->db))->create($input);
            Cache::instance()->reset('.url'); // invalide le cache des pages publiques
            $this->flash('success', 'Article créé.');
            $this->f3->reroute('@dashboard');
        } catch (RuntimeException $e) {
            $this->renderForm('Nouvel article', $this->f3->alias('post_store'), $input, $e->getMessage());
        }
    }

    public function edit(): void
    {
        $post = (new Post($this->db))->findForEdit((int) $this->f3->get('PARAMS.id'));
        if ($post === null) {
            $this->f3->error(404, 'Article introuvable.');
            return;
        }

        $this->renderForm('Modifier l\'article', $this->f3->alias('post_update', ['id' => $post['id']]), $post);
    }

    public function update(): void
    {
        $this->verifyCsrf();

        $id = (int) $this->f3->get('PARAMS.id');
        $input = $this->postInput() + ['id' => $id];

        try {
            $updated = (new Post($this->db))->updatePost($id, $input);
            if (!$updated) {
                $this->f3->error(404, 'Article introuvable.');
                return;
            }

            Cache::instance()->reset('.url'); // invalide le cache des pages publiques
            $this->flash('success', 'Article mis à jour.');
            $this->f3->reroute('@dashboard');
        } catch (RuntimeException $e) {
            $this->renderForm('Modifier l\'article', $this->f3->alias('post_update', ['id' => $id]), $input, $e->getMessage());
        }
    }

    public function delete(): void
    {
        $this->verifyCsrf();
        (new Post($this->db))->delete((int) $this->f3->get('PARAMS.id'));
        Cache::instance()->reset('.url'); // invalide le cache des pages publiques
        $this->flash('success', 'Article supprimé.');
        $this->f3->reroute('@dashboard');
    }

    private function renderForm(string $pageTitle, string $formAction, array $post, ?string $error = null): void
    {
        $coverPreview = null;
        if (!empty($post['cover_media_id'])) {
            $coverPreview = (new Media($this->db))->findById((int) $post['cover_media_id']);
        }

        $media = new Media($this->db);
        $mediaItems = $media->latest(self::MEDIA_PICKER_LIMIT);
        $mediaCount = $media->countAll();
        $flash = $error !== null ? ['type' => 'error', 'message' => $error] : null;

        $this->renderSession('admin/post_form.html', [
            'pageTitle' => $pageTitle,
            'formAction' => $formAction,
            'post' => $post,
            'coverPreview' => $coverPreview,
            'mediaItems' => $mediaItems,
            'mediaCount' => $mediaCount,
            'mediaPickerLimit' => self::MEDIA_PICKER_LIMIT,
            'mediaPickerTruncated' => $mediaCount > count($mediaItems),
            'titleMax' => Post::TITLE_MAX_LENGTH,
            'excerptMax' => Post::EXCERPT_MAX_LENGTH,
            'flash' => $flash,
        ], true);
    }

    private function postInput(): array
    {
        return [
            'title' => trim((string) ($this->f3->get('POST.title') ?? '')),
            'excerpt' => trim((string) ($this->f3->get('POST.excerpt') ?? '')),
            'cover_media_id' => (string) ($this->f3->get('POST.cover_media_id') ?? ''),
            'body_markdown' => trim((string) ($this->f3->get('POST.body_markdown') ?? '')),
        ];
    }
}