// 'src\API\bodyPosition.ts' 提供方法，得到示意图完整路径，输入是view_icon_name，本质是个url path，输出是个完整的url，算法是拼接'src\API\config.ts' 提供的base url和“/pub”和view_icon_name

import { API_BASE_URL } from './config';
/**
 * 意图
 * @param viewIconName view_icon_name的值
 * @description 这个方法用于获取view_icon_name的完整URL路径
 * @returns
 */
export function getViewIconUrl(viewIconName: string): string {
  return `${API_BASE_URL}pub${viewIconName}`;
}
/**
 * 得到exposed image的完整URL路径
 * @param sopInstanceUid
 * @returns
 */
export function getExposedImageUrl(sopInstanceUid: string): string {
  return `${API_BASE_URL}pub/thumbnail/${sopInstanceUid}.jpg`;
}

export function getDcmImageUrl(sopInstanceUid: string): string {
  return `dicomweb:${API_BASE_URL}pub/dcm/${sopInstanceUid}.dcm`;
}
export function getSopInstanceUidFromUrl(url: string): string {
  if (!url.startsWith('dicomweb:')) {
    throw new Error('Invalid URL format: must start with "dicomweb:"');
  }

  const path = url.substring('dicomweb:'.length);
  const segments = path.split('/').filter(Boolean); // 移除空段

  // 查找 'dcm' 段的位置
  const dcmIndex = segments.indexOf('dcm');
  if (dcmIndex === -1) {
    throw new Error('Invalid path format: expected "/dcm/{sopInstanceUid}.dcm" segment');
  }

  // 下一个段应该是 {sopInstanceUid}.dcm
  if (dcmIndex + 1 >= segments.length) {
    throw new Error('Invalid path format: missing file name after "dcm"');
  }

  const filename = segments[dcmIndex + 1];
  if (!filename.endsWith('.dcm')) {
    throw new Error('Invalid file extension: expected ".dcm"');
  }

  const sopInstanceUid = filename.slice(0, -4); // 移除 .dcm
  if (!sopInstanceUid) {
    throw new Error('Empty SOP Instance UID');
  }

  return sopInstanceUid;
}