import { Body, Controller, Get, Param, Put, Res, UseGuards } from '@nestjs/common';
import type { Response } from 'express';
import { JwtAuthGuard, AuthUser } from '../../common/guards/jwt-auth.guard';
import { PartnerPrimaryGuard } from '../../common/guards/partner-primary.guard';
import { CurrentUser } from '../../common/decorators/current-user.decorator';
import { ActivityPosterService } from './activity-poster.service';
import { ActivityPosterSelectionDto } from './dto/activity-poster.dto';

@Controller('partner/activity-posters')
@UseGuards(JwtAuthGuard, PartnerPrimaryGuard)
export class PartnerActivityPostersController {
  constructor(private readonly service: ActivityPosterService) {}

  @Get()
  list() {
    return this.service.listForPartner();
  }

  @Get('selection')
  getSelection(@CurrentUser() user: AuthUser) {
    return this.service.getSelection(user.actorId);
  }

  @Put('selection')
  setSelection(@CurrentUser() user: AuthUser, @Body() dto: ActivityPosterSelectionDto) {
    const raw = dto.posterId?.trim();
    const posterId = raw && /^\d+$/.test(raw) ? BigInt(raw) : null;
    return this.service.setSelection(user.actorId, posterId);
  }

  @Get(':id/image')
  async image(@CurrentUser() user: AuthUser, @Param('id') id: string, @Res() res: Response) {
    const { buffer, fileName } = await this.service.composeForPartner(user.actorId, BigInt(id));
    res.setHeader('Content-Type', 'image/png');
    res.setHeader('Content-Disposition', `attachment; filename="${fileName}"`);
    res.send(buffer);
  }
}