/**
 * Document-generation domain hooks (TaskMaster #214).
 *
 * The "הפקת מסמכים" card in the case "טיוטות והערות" tab fires two deterministic,
 * host-side generation actions through the CEO (structured-action wakeup):
 *   • party_claims_summary → an executive summary of the parties' claims
 *   • interim_draft        → a partial draft (blocks ה–ט, up to the discussion)
 *
 * Generation runs on the host (claude_session → claude -p), NOT in the container,
 * so the trigger endpoints return 202-accepted and the UI POLLS for completion:
 *   • summary → GET /api/cases/{n}/research/party-claims-summary (200 = ready)
 *   • interim draft → the exports list grows a "טיוטת-ביניים-{n}-vN.docx" file
 *     (polled via useExports — see exports.ts).
 *
 * The full-decision export ("הפק טיוטת החלטה מלאה") is NOT here — it reuses the
 * existing in-container useExportDocx (exports.ts), no LLM, no wakeup.
 */

import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
import { ApiError, apiRequest } from "./client";

/** Shape returned by the structured-action wakeup endpoints (#214). */
export type GenerateTriggerResult = {
  status: "ok" | "skipped" | "error";
  action?: string;
  issue_id?: string;
  ceo_id?: string;
  reason?: string;
  error?: string;
};

export const generateKeys = {
  all: ["generate"] as const,
  partyClaimsSummary: (caseNumber: string) =>
    [...generateKeys.all, "party-claims-summary", caseNumber] as const,
};

/* ── Read: party-claims executive summary (poll target for button 1) ──
   404 (not generated yet) is a normal "not ready" state, not an error — we
   coerce it to null so the panel renders the empty/idle state cleanly. */
export type PartyClaimsSummary = { markdown: string } | null;

export function usePartyClaimsSummary(caseNumber: string | undefined) {
  return useQuery<PartyClaimsSummary>({
    queryKey: generateKeys.partyClaimsSummary(caseNumber ?? ""),
    queryFn: async ({ signal }) => {
      try {
        return await apiRequest<{ markdown: string }>(
          `/api/cases/${caseNumber}/research/party-claims-summary`,
          { signal },
        );
      } catch (e) {
        if (e instanceof ApiError && e.status === 404) return null;
        throw e;
      }
    },
    enabled: Boolean(caseNumber),
    staleTime: 5_000,
    retry: false,
  });
}

/* ── Trigger: party-claims executive summary (button 1) ── */
export function useGeneratePartyClaimsSummary(caseNumber: string) {
  const qc = useQueryClient();
  return useMutation({
    mutationFn: () =>
      apiRequest<GenerateTriggerResult>(
        `/api/cases/${caseNumber}/generate/party-claims-summary`,
        { method: "POST" },
      ),
    onSuccess: () => {
      // Start polling fresh — the file will appear after the host run completes.
      qc.invalidateQueries({
        queryKey: generateKeys.partyClaimsSummary(caseNumber),
      });
    },
  });
}

/* ── Trigger: interim ("party-claims") partial draft (button 2) ── */
export function useGenerateInterimDraft(caseNumber: string) {
  return useMutation({
    mutationFn: () =>
      apiRequest<GenerateTriggerResult>(
        `/api/cases/${caseNumber}/generate/interim-draft`,
        { method: "POST" },
      ),
    // The result lands in the exports list (טיוטת-ביניים-*.docx); useExports
    // already polls on a 5s interval, so no extra invalidation is needed here.
  });
}