/**
 * Citation-verification domain (X11 Phase 2 / #154) — the compose "אימות פסיקה" tab.
 *
 * Per legal argument: in-corpus supporting precedents with the cumulative authority
 * signal (cited_by — followed/distinguished), their verify state + chair note, and
 * per-issue radar (unlinked digests). The chair verifies before the writer cites
 * (INV-AH). Backed by GET/POST /api/cases/{n}/citation-verification[/verify].
 */

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

export type CitedBy = {
  total: number;
  positive: number;
  negative: number;
  unclassified: number;
  by_treatment: Record<string, number>;
};

export type SupportingPrecedent = {
  case_law_id: string;
  case_number: string;
  case_name: string;
  quote: string;
  score: number;
  cited_by: CitedBy;
  attached_id: string | null;
  verified: boolean;
  chair_note: string;
};

export type RadarLead = {
  digest_id: string;
  yomon_number?: string | number | null;
  headline: string;
  underlying_citation: string;
  underlying_court: string;
  score: number;
  missing_precedent_id: string | null;
  missing_precedent_status: string | null;
  action: "new_lead" | "gap_open" | "fetched" | "available_link" | string;
  matched_issues?: string[];
};

export type ArgumentBlock = {
  argument_id: string;
  title: string;
  legal_topic: string;
  priority: string;
  party: string;
  supporting: SupportingPrecedent[];
  radar: RadarLead[];
};

export type CitationVerificationView = {
  status: string;
  case_number: string;
  arguments: ArgumentBlock[];
  summary: {
    arguments_total: number;
    arguments_with_support: number;
    verified: number;
    radar_leads: number;
  };
};

export type VerifyCitationBody = {
  argument_id: string;
  case_law_id?: string;
  quote?: string;
  citation?: string;
  chair_note?: string | null;
  verified: boolean;
  attached_id?: string;
};

export function useCitationVerification(caseNumber: string | undefined) {
  return useQuery({
    queryKey: ["citation-verification", caseNumber ?? ""],
    queryFn: ({ signal }) =>
      apiRequest<CitationVerificationView>(
        `/api/cases/${caseNumber}/citation-verification`,
        { signal },
      ),
    enabled: Boolean(caseNumber),
    // The view is an expensive synthesized build (per-argument Voyage embed +
    // vector search on the backend). Keep it fresh for 5 min and do NOT refetch
    // on remount — Radix Tabs unmounts inactive TabsContent, so every tab switch
    // back used to trigger a full rebuild. Verify mutations invalidate the query,
    // so edits still pull fresh data.
    staleTime: 5 * 60_000,
    refetchOnMount: false,
  });
}

export function useVerifyCitation(caseNumber: string | undefined) {
  const qc = useQueryClient();
  return useMutation({
    mutationFn: (body: VerifyCitationBody) =>
      apiRequest(`/api/cases/${caseNumber}/citation-verification/verify`, {
        method: "POST",
        body,
      }),
    onSuccess: () => {
      qc.invalidateQueries({ queryKey: ["citation-verification", caseNumber ?? ""] });
    },
  });
}