(function () {
  'use strict';

  async function request(path, params) {
    const url = new URL(SR.config.getBase() + path);
    if (params) {
      for (const [key, value] of Object.entries(params)) {
        if (value === undefined || value === null || value === '') continue;
        url.searchParams.set(key, String(value));
      }
    }
    let res;
    try {
      res = await fetch(url.toString());
    } catch (e) {
      throw new Error(`cannot reach the API at ${SR.config.getBase()} — check the base URL in Settings`);
    }
    let data = null;
    try {
      data = await res.json();
    } catch (e) {
      /* non-JSON body */
    }
    if (!res.ok) {
      throw new Error((data && data.error) || `API error: HTTP ${res.status}`);
    }
    return data;
  }

  // route a media/subtitle URL through the API proxy (CORS, headers, m3u8 rewrite)
  function proxyUrl(target, headers) {
    const q = new URLSearchParams();
    q.set('url', target);
    q.set('h', JSON.stringify(headers || {}));
    return SR.config.getBase() + '/proxy/media?' + q.toString();
  }

  window.SR = window.SR || {};
  SR.api = {
    request,
    proxyUrl,
    search: (q) => request('/search', { q }),
    trending: (type, timeWindow) => request('/trending', { type, window: timeWindow }),
    details: (type, id) => request(`/${type}/${id}`),
    seasons: (id) => request(`/tv/${id}/seasons`),
    episodes: (id, season) => request(`/tv/${id}/seasons/${season}`),
    streams: ({ tmdb, type, season, episode }) => request('/streams', { tmdb, type, season, episode }),
  };
})();