async function _request(url, opts = {}) {
  const res = await fetch(url, opts);
  if (!res.ok) {
    const err = await res.json().catch(() => ({ detail: res.statusText }));
    throw new Error(`${res.status}: ${JSON.stringify(err)}`);
  }
  return res.json();
}

function _post(url, body) {
  return _request(url, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(body),
  });
}

export const getConfig          = ()      => _request("/api/check");
export const getPersonas        = ()      => _request("/api/personas");
export const createToken        = (data)  => _post("/api/session/token", data);

export const getRagStatus       = ()      => _request("/api/rag/status");
export const getRagDocuments    = ()      => _request("/api/rag/documents");
export const deleteRagDocument  = (id)    => _request(`/api/rag/documents/${id}`, { method: "DELETE" });
export const getRagPrompt       = ()      => _request("/api/rag/persona");
export const updateRagPrompt    = (prompt, languageCode) =>
  _request("/api/rag/persona", {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ system_prompt: prompt, language_code: languageCode || null }),
  });
export const resetRag = () => _post("/api/rag/reset", {});

export async function uploadRagFile(file) {
  const form = new FormData();
  form.append("file", file);
  const res = await fetch("/api/rag/upload", { method: "POST", body: form });
  if (!res.ok) throw new Error(JSON.stringify(await res.json().catch(() => res.statusText)));
  return res.json();
}

// ── Local RAG (in-memory, injected into system prompt) ────────────────────────
export const listLocalDocs   = ()      => _request("/api/local-rag/documents");
export const deleteLocalDoc  = (id)    => _request(`/api/local-rag/documents/${id}`, { method: "DELETE" });
export async function uploadLocalDoc(file) {
  const form = new FormData();
  form.append("file", file);
  const res = await fetch("/api/local-rag/upload", { method: "POST", body: form });
  if (!res.ok) throw new Error(JSON.stringify(await res.json().catch(() => res.statusText)));
  return res.json();
}

// ── Clinical (blood test report) ───────────────────────────────────────────────
export async function uploadClinicalReport(file) {
  const form = new FormData();
  form.append("file", file);
  const res = await fetch("/api/clinical/upload", { method: "POST", body: form });
  if (!res.ok) throw new Error(JSON.stringify(await res.json().catch(() => res.statusText)));
  return res.json();
}

export const getClinicalReport    = () => _request("/api/clinical/current");
export const deleteClinicalReport = () => _request("/api/clinical/current", { method: "DELETE" });

// ── Telemetry ──────────────────────────────────────────────────────────────────
export const endSession          = (sessionId) => _post("/api/session/end", { session_id: sessionId });
export const getTelemetrySummary = ()           => _request("/api/telemetry/summary");
export const getTelemetrySessions = ()          => _request("/api/telemetry/sessions");
export const resetTelemetry      = ()           => _post("/api/telemetry/reset", {});