import { Controller, Get, Header, Query, Res } from '@nestjs/common';
import { httpDocVersion, readHttpGuide, renderHttpGuide } from './docs/reader';

@Controller('client-docs')
export class OpenApiDocsController {
  @Get()
  @Header('Cache-Control', 'no-cache')
  getGuide(
    @Query('format') format: string | undefined,
    @Res()
    response: {
      type: (value: string) => void;
      setHeader: (name: string, value: string) => void;
      send: (value: string) => void;
    },
  ) {
    const markdown = readHttpGuide();
    response.setHeader('X-Document-Version', httpDocVersion(markdown));
    response.setHeader('X-Content-Type-Options', 'nosniff');
    if (format === 'md') {
      response.type('text/markdown; charset=utf-8');
      response.setHeader('Content-Disposition', 'attachment; filename="client-http-api-guide.md"');
      response.send(markdown);
      return;
    }
    response.type('text/html; charset=utf-8');
    response.setHeader(
      'Content-Security-Policy',
      "default-src 'none'; script-src 'unsafe-inline'; style-src 'unsafe-inline'; connect-src 'none'; img-src 'none'; base-uri 'none'; form-action 'none'; frame-ancestors 'self'",
    );
    response.send(renderHttpGuide(markdown, process.env.HTTP_API_PUBLIC_ORIGIN?.replace(/\/+$/, '') ?? ''));
  }
}