// apps/box-mgnt-api/src/mgnt-backend/feature/video-media/video-media.controller.ts
import {
  Controller,
  Get,
  Param,
  Query,
  Patch,
  Body,
  Post,
  Delete,
  Req,
  Res,
  BadRequestException,
} from '@nestjs/common';
import type { FastifyReply, FastifyRequest } from 'fastify';
import {
  ApiTags,
  ApiOperation,
  ApiParam,
  ApiConsumes,
  ApiBody,
  ApiResponse,
  ApiOkResponse,
  ApiNotFoundResponse,
  ApiBadRequestResponse,
} from '@nestjs/swagger';
import { VideoMediaService } from './video-media.service';
import {
  VideoMediaListQueryDto,
  UpdateVideoMediaTagsDto,
  UpdateVideoMediaStatusDto,
  BatchUpdateVideoMediaStatusDto,
  VideoMediaListItemDto,
  VideoMediaDetailDto,
  UpdateVideoMediaCoverResponseDto,
} from './video-media.dto';

@ApiTags('视频管理 (Video Media Management)')
@Controller('video-media')
export class VideoMediaController {
  constructor(private readonly videoMediaService: VideoMediaService) {}

  /**
   * 列表查询
   * POST /video-media/list
   */
  @ApiOperation({
    summary: '获取视频媒体列表',
    description: '分页查询视频列表，支持关键词搜索和上下架状态过滤',
  })
  @ApiOkResponse({
    description: '返回视频媒体分页列表',
    schema: {
      type: 'object',
      properties: {
        data: {
          type: 'array',
          items: { $ref: '#/components/schemas/VideoMediaListItemDto' },
        },
        total: { type: 'number', example: 100 },
        page: { type: 'number', example: 1 },
        pageSize: { type: 'number', example: 20 },
      },
    },
  })
  @ApiBadRequestResponse({
    description: '请求参数验证失败',
  })
  @Post('list')
  async findAll(@Body() dto: VideoMediaListQueryDto) {
    return this.videoMediaService.findAll(dto);
  }

  /**
   * 详情（管理弹窗）
   * GET /video-media/:id
   */
  @ApiOperation({
    summary: '获取视频媒体详情',
    description:
      '获取单个视频媒体的完整详细信息，包括基础属性、管理信息和反范式化数据',
  })
  @ApiParam({
    name: 'id',
    type: String,
    description: '视频媒体 MongoDB ID',
    example: '507f1f77bcf86cd799439011',
  })
  @ApiOkResponse({
    description: '返回视频媒体详情',
    type: VideoMediaDetailDto,
  })
  @ApiNotFoundResponse({
    description: '视频媒体不存在',
  })
  @Get(':id')
  async findOne(@Param('id') id: string) {
    return this.videoMediaService.findOne(id);
  }

  /**
   * 管理弹窗保存（标题 / 分类 / 标签 / 上下架）
   * PATCH /video-media/:id/manage
   */
  @ApiOperation({
    summary: '更新视频媒体管理信息',
    description: '更新视频的标题、分类、标签、上下架状态等管理级别信息',
  })
  @ApiBody({
    type: UpdateVideoMediaTagsDto,
    description: '更新的管理信息',
  })
  @Post('update-video-tags')
  async updateManage(@Body() dto: UpdateVideoMediaTagsDto) {
    return this.videoMediaService.updateVideoTags(dto);
  }

  /**
   * 单个上/下架
   * PATCH /video-media/:id/status
   */
  @ApiOperation({
    summary: '更新视频媒体上下架状态',
    description: '对单个视频进行上架（1）或下架（0）操作',
  })
  @ApiParam({
    name: 'id',
    type: String,
    description: '视频媒体 MongoDB ID',
    example: '507f1f77bcf86cd799439011',
  })
  @ApiBody({
    type: UpdateVideoMediaStatusDto,
    description: '上下架状态信息',
  })
  @ApiOkResponse({
    description: '状态更新成功',
    type: VideoMediaDetailDto,
  })
  @ApiNotFoundResponse({
    description: '视频媒体不存在',
  })
  @ApiBadRequestResponse({
    description: '请求参数验证失败',
  })
  @Patch(':id/status')
  async updateStatus(
    @Param('id') id: string,
    @Body() dto: UpdateVideoMediaStatusDto,
  ) {
    return this.videoMediaService.updateStatus(id, dto);
  }

  /**
   * 批量上/下架
   * POST /video-media/batch/status
   */
  @ApiOperation({
    summary: '批量更新视频媒体上下架状态',
    description: '对多个视频进行批量上架或下架操作',
  })
  @ApiBody({
    type: BatchUpdateVideoMediaStatusDto,
    description: '批量更新信息，包含 ID 列表和目标状态',
  })
  @ApiOkResponse({
    description: '批量更新成功',
    schema: {
      type: 'object',
      properties: {
        success: { type: 'number', example: 10 },
        failed: { type: 'number', example: 0 },
      },
    },
  })
  @ApiBadRequestResponse({
    description: '请求参数验证失败',
  })
  @Post('batch/status')
  async batchUpdateStatus(@Body() dto: BatchUpdateVideoMediaStatusDto) {
    return this.videoMediaService.batchUpdateStatus(dto);
  }

  /**
   * 封面上传：
   * - 前端通过 multipart/form-data 上传文件
   * - 这里示例使用 FileInterceptor；实际中你会上传到 S3，得到一个 URL / key
   * POST /video-media/:id/cover
   */
  @ApiOperation({
    summary: '上传视频封面',
    description: '为指定视频上传或更新自定义封面图片，支持上传至 S3 存储',
  })
  @ApiParam({
    name: 'id',
    type: String,
    description: '视频媒体 MongoDB ID',
    example: '507f1f77bcf86cd799439011',
  })
  @ApiConsumes('multipart/form-data')
  @ApiBody({
    description: '封面图片文件上传',
    schema: {
      type: 'object',
      properties: {
        file: {
          type: 'string',
          format: 'binary',
          description: '图片文件（支持 JPG、PNG 等常见格式）',
        },
      },
      required: ['file'],
    },
  })
  @ApiOkResponse({
    description: '封面上传成功',
    type: UpdateVideoMediaCoverResponseDto,
  })
  @ApiNotFoundResponse({
    description: '视频媒体不存在',
  })
  @ApiBadRequestResponse({
    description: '文件格式或大小不符合要求',
  })
  @Post(':id/cover')
  async updateCover(@Param('id') id: string, @Req() req: FastifyRequest) {
    const reqAny = req as any;
    const bodyFile = reqAny.body?.file;
    let mpFile = Array.isArray(bodyFile) ? bodyFile[0] : bodyFile;
    if (!mpFile && reqAny.isMultipart?.()) {
      mpFile = await reqAny.file();
    }

    if (!mpFile) {
      throw new BadRequestException('No file uploaded');
    }
    return this.videoMediaService.updateCover(id, mpFile);
  }

  // TODO: 删除视频媒体
  @ApiOperation({
    summary: '删除视频媒体',
    description: '根据 ID 删除指定的视频媒体',
  })
  @ApiParam({
    name: 'id',
    type: String,
    description: '视频媒体 MongoDB ID',
    example: '507f1f77bcf86cd799439011',
  })
  @ApiOkResponse({
    description: '删除成功',
    schema: {
      type: 'object',
      properties: {
        id: { type: 'string', example: '507f1f77bcf86cd799439011' },
      },
    },
  })
  @ApiNotFoundResponse({
    description: '视频媒体不存在',
  })
  @Delete(':id')
  async delete(@Param('id') id: string) {
    return this.videoMediaService.delete(id);
  }

  /**
   * 导入 Excel 标签
   * POST /video-media/import/excel-tags
   */
  @ApiOperation({
    summary: '导入视频标签',
    description: '从 Excel 文件导入视频标签并更新视频媒体',
  })
  @ApiConsumes('multipart/form-data')
  @ApiBody({
    schema: {
      type: 'object',
      properties: {
        file: { type: 'string', format: 'binary' },
      },
      required: ['file'],
    },
  })
  @Post('import/excel-tags')
  async importExcelTags(@Req() req: FastifyRequest) {
    const getBuffer = async (file: any): Promise<Buffer | undefined> => {
      if (!file) return undefined;
      if (Buffer.isBuffer(file)) return file;
      if (file instanceof Uint8Array) return Buffer.from(file);

      const candidate =
        file.buffer ?? file.data ?? file.value ?? file._buf ?? undefined;
      if (Buffer.isBuffer(candidate)) return candidate;
      if (candidate instanceof Uint8Array) return Buffer.from(candidate);
      if (typeof candidate === 'string') return Buffer.from(candidate);

      if (typeof file.toBuffer === 'function') {
        const buf = await file.toBuffer();
        if (Buffer.isBuffer(buf)) return buf;
      }

      if (file.file) {
        const chunks: Buffer[] = [];
        for await (const chunk of file.file) {
          chunks.push(Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk));
        }
        if (chunks.length > 0) {
          return Buffer.concat(chunks);
        }
      }

      return undefined;
    };

    // fastify multipart
    const reqAny = req as any;
    const bodyFile = reqAny.body?.file;
    let mpFile = Array.isArray(bodyFile) ? bodyFile[0] : bodyFile;
    if (!mpFile && reqAny.isMultipart?.()) {
      mpFile = await reqAny.file();
    }

    if (!mpFile) {
      throw new BadRequestException('No file uploaded');
    }

    const buf = await getBuffer(mpFile);

    if (!buf?.length) {
      throw new BadRequestException('Empty file');
    }

    return this.videoMediaService.importExcelTags(buf);
  }

  /**
   * 导出所有视频媒体为 Excel
   * GET /video-media/export/excel
   */
  @Get('export/excel')
  async exportExcel(@Res() res: FastifyReply) {
    const buffer = await this.videoMediaService.exportExcel();
    res
      .header(
        'Content-Type',
        'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
      )
      .header('Content-Disposition', 'attachment; filename="video-media.xlsx"')
      .send(buffer);
  }
}