/* api.js - Chan Compass frontend -> Gradio Server backend.
   JSON helpers + a Server-Sent-Events reader for streaming LLM output. */
window.CCApi = (function () {
  async function jget(url) {
    const r = await fetch(url);
    if (!r.ok) throw new Error(await r.text());
    return r.json();
  }
  async function jpost(url, body, timeoutMs = 180000) {
    const controller = new AbortController();
    const timer = setTimeout(() => controller.abort(), timeoutMs);
    try {
      const r = await fetch(url, {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify(body || {}),
        signal: controller.signal,
      });
      if (!r.ok) throw new Error(await r.text());
      return r.json();
    } catch (e) {
      if (e.name === "AbortError") throw new Error("Request timed out after " + (timeoutMs / 1000) + "s — the server may still be running. Refresh and try again.");
      throw e;
    } finally {
      clearTimeout(timer);
    }
  }

  /* Stream an SSE endpoint. onChunk(obj) per message; resolves on `done`. */
  function stream(url, onChunk) {
    return new Promise((resolve, reject) => {
      const es = new EventSource(url);
      es.onmessage = (e) => {
        try { onChunk(JSON.parse(e.data)); } catch (_) { onChunk({ text: e.data }); }
      };
      es.addEventListener("done", () => { es.close(); resolve(); });
      es.onerror = () => { es.close(); resolve(); };
    });
  }

  return {
    lastResults: () => jget("/api/last-results"),
    runSignals: (pool, force) => jpost("/api/signals/run", { pool, force }),
    signalSummary: (ticker, onChunk) =>
      stream("/api/signals/summary?ticker=" + encodeURIComponent(ticker), onChunk),
    rotation: () => jget("/api/rotation"),
    rotationNarrative: (onChunk) => stream("/api/rotation/narrative", onChunk),
    holdings: () => jget("/api/news/holdings"),
    saveHoldings: (holdings) => jpost("/api/news/save", { holdings }),
    checkNews: (onChunk) => stream("/api/news/check", onChunk),
    runResearch: (ticker, onChunk) =>
      stream("/api/research/run?ticker=" + encodeURIComponent(ticker), onChunk),
    reports: () => jget("/api/research/reports"),
    report: (name) => jget("/api/research/report?name=" + encodeURIComponent(name)),
    autoRun: () => jpost("/api/automation/run", {}),
    autoState: () => jget("/api/automation/state"),
    publishTraces: (repo) => jpost("/api/automation/publish-traces", { repo }),
    marketStatus: () => jget("/api/market/status"),
    modelList: () => jget("/api/model/list"),
    modelLoad: (model) => jpost("/api/model/load", { model }),
    modelStatus: () => jget("/api/model/status"),
    modelTest: () => jpost("/api/model/test", {}),
    modelTestStatus: () => jget("/api/model/test-status"),
    finetuneStatus: () => jget("/api/model/finetune-status"),
    exportDataset: () => jpost("/api/model/export-dataset", {}),
    email: (content, to, tag) => jpost("/api/email", { content, to, tag }),
  };
})();