(()=>{
  'use strict';
  const READ_RPCS=new Set(['sun_my_workspaces','sun_fetch_app_state','sun_is_platform_admin','caterium_trial_demo_status']);
  function create({upstream,proxy,timeout=7000,fallbackTimeout=4000}){
    const origin=new URL(upstream).origin;
    return async function(input,init={}){
      const original=new Request(input,init),url=new URL(original.url),isBackend=url.origin===origin;
      const read=original.method==='GET'||original.method==='HEAD'||(original.method==='POST'&&url.pathname.startsWith('/rest/v1/rpc/')&&READ_RPCS.has(url.pathname.slice('/rest/v1/rpc/'.length)));
      const passwordLogin=original.method==='POST'&&url.pathname==='/auth/v1/token'&&url.searchParams.get('grant_type')==='password';
      const safeFallback=isBackend&&(read||passwordLogin);
      const expectJson=original.method!=='HEAD'&&(passwordLogin||url.pathname.startsWith('/rest/v1/rpc/')||(read&&(url.pathname.startsWith('/rest/v1/')||url.pathname.startsWith('/auth/v1/'))));
      async function attempt(target,limit){
        const controller=new AbortController(),abort=()=>controller.abort(original.signal.reason);
        if(original.signal.aborted)abort();else original.signal.addEventListener('abort',abort,{once:true});
        const timer=setTimeout(()=>controller.abort(),limit);
        try{
          const response=await fetch(new Request(target,original.clone()),{signal:controller.signal});
          if(expectJson&&response.ok&&response.status!==204){
            const text=await response.clone().text();
            try{if(!text.trim()||!response.headers.get('content-type')?.includes('json'))throw new Error();JSON.parse(text)}
            catch(_){throw new Error('Сервис вернул пустой или некорректный ответ. Повторите загрузку.')}
          }
          return response;
        }finally{clearTimeout(timer);original.signal.removeEventListener('abort',abort)}
      }
      try{
        const response=await attempt(isBackend?proxy+url.pathname+url.search:original.url,timeout);
        if(!safeFallback||response.status<500)return response;
      }catch(error){if(!safeFallback||original.signal.aborted)throw error}
      // Same backend, same authorization, one SDK session. Never replay writes.
      return attempt(original.url,fallbackTimeout);
    };
  }
  window.CateriumCloudTransport=Object.freeze({create});
})();