import { Controller, Get, Param, Req } from '@nestjs/common';
import { BacklinkView, PhantomLinkView } from '@dorfteich/shared';

import { AuthedRequest } from '../auth/auth.guard';
import { RequiresPagePermission, RequiresPondRole } from '../permissions/permission.decorators';
import { LinksService } from './links.service';

/** Wikilink index reads (issue #47): backlinks and a pond's phantom links. */
@Controller()
export class LinksController {
  constructor(private readonly links: LinksService) {}

  /** Pages that link to this page (permission-filtered). */
  @Get('pages/:id/backlinks')
  @RequiresPagePermission('read', { idParam: 'id' }) // sources are filtered per page
  async backlinks(@Param('id') id: string, @Req() request: AuthedRequest): Promise<BacklinkView[]> {
    return this.links.backlinks(request.user!, id);
  }

  /** Referenced-but-missing pages in the pond, with their referrers. */
  @Get('ponds/:pondId/phantom-links')
  @RequiresPondRole('reader', { idParam: 'pondId' }) // referrers are filtered per page
  async phantomLinks(
    @Param('pondId') pondId: string,
    @Req() request: AuthedRequest,
  ): Promise<PhantomLinkView[]> {
    return this.links.phantomLinks(request.user!, pondId);
  }
}