<?php

declare(strict_types=1);

class AdminController extends Controller
{
    private const UPLOAD_MAX_BYTES = 10 * 1024 * 1024;

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

    public function index(): void
    {
        $page = max(1, (int) ($this->f3->get('GET.page') ?: 1));
        $result = (new Post())->page($page, 12);

        $this->render('admin/dashboard.html', [
            'pageTitle' => 'Tableau de bord',
            'posts' => $result['items'],
            'pagination' => $result['pagination'],
            'paginationAlias' => 'dashboard',
            'adminMode' => true,
        ]);
    }

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

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

        try {
            (new Post())->savePost($input);
            $this->flash('success', 'Article créé.');
            $this->f3->reroute('@dashboard');
        } catch (RuntimeException $e) {
            $this->renderPostForm('Nouvel article', $this->f3->alias('post_store'), $input, $e->getMessage());
        }
    }

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

        $this->renderPostForm('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->readPostInput() + ['id' => $id];

        try {
            (new Post())->savePost($input, $id);
            $this->flash('success', 'Article mis à jour.');
            $this->f3->reroute('@dashboard');
        } catch (RuntimeException $e) {
            $this->renderPostForm('Modifier l\'article', $this->f3->alias('post_update', ['id' => $id]), $input, $e->getMessage());
        }
    }

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

        try {
            (new Post())->deleteById((int) $this->f3->get('PARAMS.id'));
            $this->flash('success', 'Article supprimé.');
        } catch (RuntimeException $e) {
            $this->flash('error', $e->getMessage());
        }

        $this->f3->reroute('@dashboard');
    }

    public function media(): void
    {
        $page = max(1, (int) ($this->f3->get('GET.page') ?: 1));
        $result = (new Media())->page($page, 24);

        $this->render('admin/media.html', [
            'pageTitle' => 'Médiathèque',
            'items' => $result['items'],
            'pagination' => $result['pagination'],
            'paginationAlias' => 'media_index',
            'adminMode' => true,
        ]);
    }

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

        try {
            $originalName = (string) ($this->f3->get('FILES.image.name') ?: '');
            $received = Web::instance()->receive(
                fn(array $file): bool => (int) ($file['size'] ?? 0) > 0 && (int) ($file['size'] ?? 0) <= self::UPLOAD_MAX_BYTES,
                overwrite: false
            );

            $path = array_key_first(array_filter($received));
            if (!$path) {
                throw new RuntimeException('Choisis une image JPG ou PNG valide.');
            }

            (new Media())->upload($path, $originalName);
            $this->flash('success', 'Image ajoutée.');
        } catch (RuntimeException $e) {
            $this->flash('error', $e->getMessage());
        }

        $this->f3->reroute('@media_index');
    }

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

        try {
            (new Media())->updateAlt(
                (int) $this->f3->get('PARAMS.id'),
                $this->f3->clean((string) ($this->f3->get('POST.alt') ?: ''))
            );
            $this->flash('success', 'Texte alternatif enregistré.');
        } catch (RuntimeException $e) {
            $this->flash('error', $e->getMessage());
        }

        $this->f3->reroute('@media_index');
    }

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

        try {
            $media = new Media();
            $item = $media->findById((int) $this->f3->get('PARAMS.id'));
            if ($item === null) {
                throw new RuntimeException('Image introuvable.');
            }
            if ((new Post())->usesMedia($item['file_name'])) {
                throw new RuntimeException('Cette image est utilisée dans un article.');
            }

            $media->deleteById($item['id']);
            $this->flash('success', 'Image supprimée.');
        } catch (RuntimeException $e) {
            $this->flash('error', $e->getMessage());
        }

        $this->f3->reroute('@media_index');
    }

    private function renderPostForm(string $title, string $action, array $post, ?string $error = null): void
    {
        $flash = $error ? [['type' => 'error', 'message' => $error]] : [];

        $this->render('admin/post_form.html', [
            'pageTitle' => $title,
            'formAction' => $action,
            'post' => $post,
            'titleMax' => Post::TITLE_MAX_LENGTH,
            'excerptMax' => Post::EXCERPT_MAX_LENGTH,
            'flash' => $flash,
            'adminMode' => true,
        ]);
    }

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