<?php
namespace Grav\Plugin\EntryActions;

use Grav\Common\Cache;
use Grav\Common\Filesystem\Folder;
use Grav\Plugin\Api\Controllers\AbstractApiController;
use Grav\Plugin\Api\Exceptions\ApiException;
use Grav\Plugin\Api\Exceptions\ForbiddenException;
use Grav\Plugin\Api\Exceptions\NotFoundException;
use Grav\Plugin\Api\Response\ApiResponse;
use Grav\Plugin\Shared\EntryScopeGuard;
use Grav\Plugin\Shared\PhotoRenumberer;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;

// Shared R6 guard + the photo-NN renumber helper both live in cache-on-save (the
// always-present custom plugin); require them so save, delete and reorder enforce
// scope identically (KTD5) and share one numbering invariant.
require_once dirname(__DIR__, 2) . '/cache-on-save/classes/EntryScopeGuard.php';
require_once dirname(__DIR__, 2) . '/cache-on-save/classes/PhotoRenumberer.php';

/**
 * DELETE /api/v1/entry/{slug}
 *
 * Deletes a journal entry folder, but only when ALL hold:
 *   - the request is the authenticated site OWNER (not merely any login/admin);
 *   - {slug} is a safe single segment (no '/', no '..');
 *   - it resolves through the page tree to a DIRECT child of the ACTIVE trip's
 *     dailies container.
 * Otherwise: 401 (anon), 403 (non-owner), 400 (bad slug), 404 (out of scope /
 * not found). On success the folder is removed and the page-tree cache cleared.
 */
class EntryActionsApiController extends AbstractApiController
{
    public function deleteEntry(ServerRequestInterface $request): ResponseInterface
    {
        // Authenticated OWNER only (KTD8). getUser() throws 401 for anonymous.
        $user = $this->getUser($request);
        // Enforce the API-key scope cap (GHSA-x7hm) with the SAME permission the
        // stock media/page-write endpoints require. The owner already holds it
        // (their add/delete media uploads pass it), so this only caps a scoped
        // key — it never blocks the legitimate owner.
        $this->requirePermission($request, 'api.pages.write');
        if (!EntryScopeGuard::isOwnerUser($this->grav, $user)) {
            throw new ForbiddenException('Only the site owner can delete journal entries.');
        }

        $slug = $this->getRouteParam($request, 'slug');
        if (!is_string($slug) || !EntryScopeGuard::isSafeSegment($slug)) {
            throw new ApiException(400, 'Bad Request', 'Invalid entry slug.');
        }

        // Resolve via $pages->find() + parent-route assertion (never raw path
        // concatenation) — same shared check the save path uses.
        $page = EntryScopeGuard::resolveActiveDailyChild($this->grav, $slug);
        if ($page === null) {
            throw new NotFoundException('Entry not found in the active trip.');
        }

        $path = $page->path();
        if (!is_string($path) || $path === '' || !is_dir($path)) {
            throw new NotFoundException('Entry folder not found.');
        }

        Folder::delete($path);
        // deleteAll() drops the cache stores but does NOT rebuild Grav's page-tree
        // index (keyed on folderHash, which doesn't change on child removal under
        // cache.check.method: folder). Without invalidateCache() the deleted entry
        // lingers in the index and the feed re-renders it — now image-less — on the
        // next load. Mirrors the create-path fix in the cache-on-save plugin. See
        // docs/solutions/integration-issues/grav-deleteall-doesnt-invalidate-page-tree-index.md
        $this->grav['cache']->deleteAll();
        Cache::invalidateCache();
        // Audit trail: entry deletion is destructive and owner-only — record who
        // did it and to what, so an unexpected disappearance is traceable.
        $this->grav['log']->info(sprintf('entry-actions: owner "%s" deleted entry "%s"', $user->username, $slug));

        return ApiResponse::noContent();
    }

    /**
     * POST /api/v1/entry/{slug}/photos/order
     *
     * Body: { "order": ["photo-x.jpg", "photo-y.jpg", …] } — the entry's image
     * files in the display order the owner arranged. Renames them to photo-01..NN
     * so the feed cover (media.images|first) and numeric client sort follow the
     * drag. Same guard chain as deleteEntry: OWNER + direct-child-of-active-dailies.
     *
     * Filename safety is defence in depth: unsafe segments (containing '/' or '..')
     * are dropped here, and PhotoRenumberer only ever renames files that already
     * exist as image media in the folder — so a crafted order body can never touch
     * the entry .md, a .gpx or a .meta.yaml sidecar. An incomplete `order` (e.g. a
     * stale second tab) is safe too: PhotoRenumberer renumbers every on-disk image,
     * appending any the manifest omits, so no photo is lost — `order` only sorts.
     */
    public function reorderPhotos(ServerRequestInterface $request): ResponseInterface
    {
        // Authenticated OWNER only (KTD8). getUser() throws 401 for anonymous.
        $user = $this->getUser($request);
        // Enforce the API-key scope cap (GHSA-x7hm) — see deleteEntry above.
        $this->requirePermission($request, 'api.pages.write');
        if (!EntryScopeGuard::isOwnerUser($this->grav, $user)) {
            throw new ForbiddenException('Only the site owner can reorder entry photos.');
        }

        $slug = $this->getRouteParam($request, 'slug');
        if (!is_string($slug) || !EntryScopeGuard::isSafeSegment($slug)) {
            throw new ApiException(400, 'Bad Request', 'Invalid entry slug.');
        }

        $page = EntryScopeGuard::resolveActiveDailyChild($this->grav, $slug);
        if ($page === null) {
            throw new NotFoundException('Entry not found in the active trip.');
        }

        $path = $page->path();
        if (!is_string($path) || $path === '' || !is_dir($path)) {
            throw new NotFoundException('Entry folder not found.');
        }

        // Reduce the body's `order` to a clean list of safe basenames. Anything
        // unsafe or non-string is dropped; PhotoRenumberer then keeps only the
        // entries that are real image files on disk.
        $body = $this->getRequestBody($request);
        $order = $body['order'] ?? null;
        if (!is_array($order)) {
            throw new ApiException(400, 'Bad Request', 'Body must include an "order" array of filenames.');
        }
        $names = [];
        foreach ($order as $name) {
            if (is_string($name) && EntryScopeGuard::isSafeSegment($name)) {
                $names[] = $name;
            }
        }

        PhotoRenumberer::renumber($path, $names);
        $this->grav['cache']->deleteAll();
        // Audit trail: mirror deleteEntry — record the owner mutating an entry's
        // photo order (and how many files the manifest listed).
        $this->grav['log']->info(sprintf('entry-actions: owner "%s" reordered %d photo(s) for entry "%s"', $user->username, count($names), $slug));

        return ApiResponse::noContent();
    }
}