// services/api/src/uploads/uploads.controller.ts —— /uploads 端点（Task 18 起；
// Task 19 增补 listUploads/renewUploadCredential/completeUpload）。方法名与契约
// operationId 一一对应。控制器级 SessionGuard：端点全需认证。职责：透传认证
// 用户 + 查询参数规整（parseLimit/parseCursor 复用相册控制器导出，同契约 bounds）。
// 注意 DTO 必须值导入（非 import type）：@Body 参数类型经 emitDecoratorMetadata
// 进入设计期元数据，import type 会令参数在管线中被置为 undefined（Task 18 实测）。
import {
  Body,
  Controller,
  Get,
  HttpCode,
  HttpStatus,
  Param,
  Post,
  Query,
  Req,
  UseGuards,
} from '@nestjs/common';
import {
  parseCursor,
  parseLimit,
  userOf,
} from '../albums/albums.controller';
import { AuthenticatedRequest, SessionGuard } from '../auth/session.guard';
import { UploadsService } from './uploads.service';
import type {
  UploadCompleteResponse,
  UploadInitResponse,
  UploadSessionListResponse,
} from './uploads.service';
import { UploadInitRequestDto } from './dto';

@Controller('uploads')
@UseGuards(SessionGuard)
export class UploadsController {
  constructor(private readonly uploadsService: UploadsService) {}

  /** 契约 201（幂等重复调用返回原会话，同 201）。 */
  @Post()
  initUpload(
    @Body() dto: UploadInitRequestDto,
    @Req() req: AuthenticatedRequest,
  ): Promise<UploadInitResponse> {
    return this.uploadsService.init(userOf(req), dto);
  }

  /** 上传历史：当前用户自己的会话，新在前，(createdAt,id) 键集游标。 */
  @Get()
  listUploads(
    @Query('cursor') cursor: string | undefined,
    @Query('limit') limit: string | undefined,
    @Req() req: AuthenticatedRequest,
  ): Promise<UploadSessionListResponse> {
    return this.uploadsService.list(
      userOf(req),
      parseCursor(cursor),
      parseLimit(limit),
    );
  }

  /** 续签：仅 pending 会话；返回结构同 initUpload（credential 为新值）。 */
  @Post(':uploadId/renew')
  @HttpCode(HttpStatus.OK)
  renewUploadCredential(
    @Param('uploadId') uploadId: string,
    @Req() req: AuthenticatedRequest,
  ): Promise<UploadInitResponse> {
    return this.uploadsService.renew(userOf(req), uploadId);
  }

  /** 完成核验：幂等（重复调用返回相同结果，不重复建 job）。 */
  @Post(':uploadId/complete')
  @HttpCode(HttpStatus.OK)
  completeUpload(
    @Param('uploadId') uploadId: string,
    @Req() req: AuthenticatedRequest,
  ): Promise<UploadCompleteResponse> {
    return this.uploadsService.complete(userOf(req), uploadId);
  }
}