import {
  Body,
  Controller,
  Get,
  HttpException,
  HttpStatus,
  Param,
  Post,
  UploadedFile,
  UseInterceptors,
} from '@nestjs/common';
import { FileInterceptor } from '@nestjs/platform-express';
import { ApiBearerAuth, ApiConsumes, ApiOperation, ApiTags } from '@nestjs/swagger';
import { CurrentUser, JwtPayload } from '../common/decorators/current-user.decorator';
import { WordCloudService } from './wordcloud.service';

@ApiTags('词云')
@ApiBearerAuth()
@Controller('wordcloud')
export class WordCloudController {
  constructor(private readonly wordCloudService: WordCloudService) {}

  /** 创建词云任务：multipart(image) + form 字段 names/params */
  @Post('generate')
  @ApiOperation({ summary: '创建词云任务（底图 + 名单文本）' })
  @ApiConsumes('multipart/form-data')
  @UseInterceptors(FileInterceptor('image', { limits: { fileSize: 10 * 1024 * 1024 } }))
  async generate(
    @CurrentUser() user: JwtPayload,
    @UploadedFile() image: Express.Multer.File | undefined,
    @Body('names') names: string,
    @Body('params') params?: string,
  ) {
    if (!image) {
      throw new HttpException('缺少底图', HttpStatus.BAD_REQUEST);
    }
    const jobId = await this.wordCloudService.createGenerateJob(
      user.sub,
      { buffer: image.buffer, originalname: image.originalname },
      names ?? '',
      params,
    );
    return { jobId };
  }

  /** 轮询词云任务（仅本人） */
  @Get('jobs/:id')
  @ApiOperation({ summary: '轮询词云任务状态（仅本人）' })
  async job(@CurrentUser() user: JwtPayload, @Param('id') id: string) {
    return this.wordCloudService.getUserJob(user.sub, id);
  }

  /** 取词云任务结果（仅本人；产物已转存 COS） */
  @Get('jobs/:id/result')
  @ApiOperation({ summary: '词云任务结果（仅本人）' })
  async result(@CurrentUser() user: JwtPayload, @Param('id') id: string) {
    return this.wordCloudService.getUserJobResult(user.sub, id);
  }
}