import { Body, Controller, Get, Param, Post, Req, Res } from '@nestjs/common';
import { ConversionJobView, PageExportInput, pageExportInputSchema } from '@dorfteich/shared';
import type { Response } from 'express';

import { AuthedRequest } from '../auth/auth.guard';
import { ZodValidationPipe } from '../common/zod-validation.pipe';
import { RequiresPagePermission, RequiresPondRole } from '../permissions/permission.decorators';

import { ExportService } from './export.service';

/**
 * Export endpoints (ADR 0009, issue #65): a whole pond as a ZIP of Markdown and
 * a single page to `.docx`/`.odt`. Per-page Markdown download stays on the pages
 * controller (`GET /pages/:id/export/markdown`, #30).
 */
@Controller()
export class ExportController {
  constructor(private readonly exports: ExportService) {}

  /** Streamed ZIP of the pond's readable pages as Markdown (+ `media/`). The
   * `reader` role is "may see the pond"; the service filters to readable pages,
   * so a label-restricted reader gets only their slice. */
  @Get('ponds/:pondId/export/markdown')
  @RequiresPondRole('reader', { idParam: 'pondId' })
  async pondZip(
    @Param('pondId') pondId: string,
    @Req() request: AuthedRequest,
    @Res() response: Response,
  ): Promise<void> {
    await this.exports.streamPondMarkdownZip(request.user!, pondId, response);
  }

  /** Enqueue a `.docx`/`.odt` export of one page; poll `GET /jobs/:id` and
   * download `GET /jobs/:id/result`. */
  @Post('pages/:pageId/export')
  @RequiresPagePermission('read', { idParam: 'pageId' })
  pageExport(
    @Param('pageId') pageId: string,
    @Body(new ZodValidationPipe(pageExportInputSchema)) input: PageExportInput,
    @Req() request: AuthedRequest,
  ): Promise<ConversionJobView> {
    return this.exports.enqueuePageExport(request.user!, pageId, input.format);
  }
}