import { apiBase, CLIENT_APP, getToken, clearAuth } from './api';
import {
  compressImageFileIfNeeded,
  DEFAULT_OSS_MAX_UPLOAD_BYTES,
  formatOssMaxSizeMb,
} from '@dukang/shared-ui/compressImage';

export type OssMediaType = 'IMAGE' | 'VIDEO' | 'FILE';

export type UploadFileResult = {
  url: string;
  ossKey: string;
  bucket: string;
  mock: boolean;
};

async function prepareUploadFile(file: File, mediaType: OssMediaType): Promise<File> {
  if (mediaType !== 'IMAGE') return file;
  const compressed = await compressImageFileIfNeeded(file);
  if (compressed.size > DEFAULT_OSS_MAX_UPLOAD_BYTES) {
    throw new Error(`图片压缩后仍超过 ${formatOssMaxSizeMb()}MB，请换一张较小的图片`);
  }
  return compressed;
}

/** 经 API 服务端转存 OSS，避免浏览器直传跨域 */
export async function uploadFileToOss(
  file: File,
  options: { bizType: string; mediaType?: OssMediaType },
): Promise<UploadFileResult> {
  const mediaType = options.mediaType ?? (file.type.startsWith('video/') ? 'VIDEO' : 'IMAGE');
  const prepared = await prepareUploadFile(file, mediaType);
  const formData = new FormData();
  formData.append('file', prepared);
  formData.append('bizType', options.bizType);
  formData.append('mediaType', mediaType);

  const headers: Record<string, string> = {
    'X-Client-App': CLIENT_APP,
  };
  const token = getToken();
  if (token) headers.Authorization = `Bearer ${token}`;

  const res = await fetch(`${apiBase}/common/resources/upload`, {
    method: 'POST',
    headers,
    body: formData,
  });
  const json = await res.json();
  if (json.code === 401) {
    clearAuth();
    window.location.href = '/login';
    throw new Error('未登录');
  }
  if (json.code !== 0) throw new Error(json.message || '上传失败');

  const data = json.data as UploadFileResult;
  return {
    url: data.url,
    ossKey: data.ossKey,
    bucket: data.bucket,
    mock: data.mock,
  };
}