// Plan 003, Faza F — feature-flag glue for ePay/CF UI.
//
// Two backends with overlapping but distinct semantics:
//
//   /api/ancpi/* → architools_postgres.CfExtract → ePay paid orders
//     (`type=epay`, 1 credit each, written by the local ePay queue).
//   /api/cf/*     → gis-api → gis_core.CfExtract → CF intern downloads
//     (`type=intern`, free copycf flow, plus historic non-ePay rows).
//
// They are NOT the same dataset. A user's complete CF history is the
// union. Pilot users (`useGisAc=true`) merge both client-side so the
// Extrase CF tab shows one timeline. Non-pilot users see only the
// legacy ePay flow (their gis_core rows are typically empty anyway —
// the cf-intern path is wired through gis-api which only pilots use).

import type { CfExtractRow } from "@/lib/gis-api-client";

// GUARD (2026-06-04): ePay ordering via gis-api is NOT live yet. gis-api's
// POST /enrichment/cf only inserts a pending CfExtract row — there is no
// orchestrator-side worker that executes the paid ePay purchase, so orders
// placed through /api/cf/order silently never complete (UI even shows
// "Extras CF valid"). Until that fulfiller ships and is verified, ALL paid
// ePay orders MUST go through the legacy local queue (/api/ancpi/order).
// Flip to true only after the orchestrator ePay worker is deployed.
export const EPAY_ORDERING_VIA_GIS_AC = false;

export function cfApiBase(useGisAc: boolean): string {
  return useGisAc ? "/api/cf" : "/api/ancpi";
}

// UI-side row shape (mirrors what epay-tab.tsx already expects).
export type CfExtractRecord = {
  id: string;
  /** epay | intern — drives the source badge + download URL routing. */
  type: "epay" | "intern";
  orderId: string | null;
  nrCadastral: string;
  nrCF: string | null;
  siruta: string | null;
  judetName: string;
  uatName: string;
  status: string;
  epayStatus: string | null;
  documentName: string | null;
  documentDate: string | null;
  minioPath: string | null;
  expiresAt: string | null;
  errorMessage: string | null;
  version: number;
  creditsUsed: number;
  createdAt: string;
  completedAt: string | null;
};

type LegacyCfExtract = {
  id: string;
  type?: string | null;
  orderId?: string | null;
  nrCadastral: string;
  nrCF?: string | null;
  siruta?: string | null;
  judetName?: string | null;
  uatName?: string | null;
  status: string;
  epayStatus?: string | null;
  documentName?: string | null;
  documentDate?: string | null;
  minioPath?: string | null;
  expiresAt?: string | null;
  errorMessage?: string | null;
  version?: number | null;
  creditsUsed?: number | null;
  createdAt: string;
  completedAt?: string | null;
};

function adaptLegacyRow(row: LegacyCfExtract): CfExtractRecord {
  return {
    id: row.id,
    type: row.type === "intern" ? "intern" : "epay",
    orderId: row.orderId ?? null,
    nrCadastral: row.nrCadastral,
    nrCF: row.nrCF ?? null,
    siruta: row.siruta ?? null,
    judetName: row.judetName ?? "",
    uatName: row.uatName ?? "",
    status: row.status,
    epayStatus: row.epayStatus ?? null,
    documentName: row.documentName ?? null,
    documentDate: row.documentDate ?? null,
    minioPath: row.minioPath ?? null,
    expiresAt: row.expiresAt ?? null,
    errorMessage: row.errorMessage ?? null,
    version: row.version ?? 1,
    creditsUsed: row.creditsUsed ?? 0,
    createdAt: row.createdAt,
    completedAt: row.completedAt ?? null,
  };
}

// Convert a gisApi CfExtractRow → the UI-side CfExtractRecord shape.
// gis-api currently doesn't surface uatName/siruta/judetName on the list
// endpoint, so we leave them blank; the row type defaults to "intern"
// because gis_core's CfExtract is the cf-intern store (the cutover plan
// hasn't yet moved ePay writes here).
export function adaptCfRow(row: CfExtractRow & { type?: string }): CfExtractRecord {
  return {
    id: row.id,
    type: row.type === "epay" ? "epay" : "intern",
    orderId: row.orderId ?? null,
    nrCadastral: row.nrCadastral,
    nrCF: row.nrCF ?? null,
    siruta: null,
    judetName: "",
    uatName: "",
    status: row.status,
    epayStatus: row.epayStatus ?? null,
    documentName: row.documentName ?? null,
    documentDate: row.documentDate ?? null,
    minioPath: row.minioPath ?? null,
    expiresAt: row.expiresAt ?? null,
    errorMessage: null,
    version: 1,
    creditsUsed: 0,
    createdAt: row.createdAt,
    completedAt: row.completedAt ?? null,
  };
}

async function fetchLegacy(
  params: { limit?: number; nrCadastral?: string; status?: string },
): Promise<{ orders: CfExtractRecord[]; total: number }> {
  const qs = new URLSearchParams();
  if (params.limit !== undefined) qs.set("limit", String(params.limit));
  if (params.status) qs.set("status", params.status);
  if (params.nrCadastral) qs.set("nrCadastral", params.nrCadastral);
  const url = `/api/ancpi/orders${qs.toString() ? `?${qs.toString()}` : ""}`;
  const res = await fetch(url);
  const data = (await res.json()) as { orders?: LegacyCfExtract[]; total?: number };
  return {
    orders: (data.orders ?? []).map(adaptLegacyRow),
    total: data.total ?? 0,
  };
}

async function fetchGisAc(
  params: { limit?: number; status?: string },
): Promise<{ orders: CfExtractRecord[]; total: number }> {
  const qs = new URLSearchParams();
  if (params.limit !== undefined) qs.set("limit", String(params.limit));
  if (params.status) qs.set("status", params.status);
  const url = `/api/cf/orders${qs.toString() ? `?${qs.toString()}` : ""}`;
  const res = await fetch(url);
  const data = (await res.json()) as {
    rows?: Array<CfExtractRow & { type?: string }>;
    total?: number;
  };
  const rows = data.rows ?? [];
  return {
    orders: rows.map(adaptCfRow),
    total: data.total ?? rows.length,
  };
}

// Fetch the orders list and normalize the response into a single shape.
// Pilot users (`useGisAc=true`) merge the two backends client-side so a
// single timeline shows ePay + intern history together. Sort newest-
// first; dedupe by id (in case the same record ever lands in both
// stores during the cutover migration).
export async function fetchCfOrdersList(
  useGisAc: boolean,
  params: { limit?: number; nrCadastral?: string; status?: string } = {},
): Promise<{ orders: CfExtractRecord[]; total: number }> {
  if (!useGisAc) {
    return fetchLegacy(params);
  }

  // Pull more rows from each side than the caller asked for so that the
  // merge+truncate keeps a representative window from both backends.
  const fetchLimit = params.limit ? Math.min(params.limit * 2, 400) : undefined;
  const fetchParams = { ...params, limit: fetchLimit };

  const [legacy, gisac] = await Promise.allSettled([
    fetchLegacy(fetchParams),
    fetchGisAc(fetchParams),
  ]);

  const merged: CfExtractRecord[] = [];
  if (legacy.status === "fulfilled") merged.push(...legacy.value.orders);
  if (gisac.status === "fulfilled") merged.push(...gisac.value.orders);

  const seen = new Set<string>();
  const dedup = merged.filter((r) => {
    if (seen.has(r.id)) return false;
    seen.add(r.id);
    return true;
  });

  dedup.sort((a, b) => (a.createdAt < b.createdAt ? 1 : -1));

  const total =
    (legacy.status === "fulfilled" ? legacy.value.total : 0) +
    (gisac.status === "fulfilled" ? gisac.value.total : 0);

  return {
    orders: params.limit ? dedup.slice(0, params.limit) : dedup,
    total,
  };
}

// Existence check used by the per-parcel order button. We check both
// backends on pilot accounts — a fresh cf-intern in gis_core OR an ePay
// extract in architools_postgres both mean "you already have one".
export async function fetchCfHasCompletedForCadastral(
  useGisAc: boolean,
  nrCadastral: string,
): Promise<boolean> {
  const checks: Array<Promise<boolean>> = [];
  // Always check legacy (ePay store) — every user can have ePay rows.
  checks.push(
    (async () => {
      try {
        const res = await fetch(
          `/api/ancpi/orders?nrCadastral=${encodeURIComponent(nrCadastral)}&status=completed&limit=1`,
        );
        const data = (await res.json()) as { total?: number };
        return Boolean(data?.total && data.total > 0);
      } catch {
        return false;
      }
    })(),
  );
  if (useGisAc) {
    checks.push(
      (async () => {
        try {
          const res = await fetch(
            `/api/cf/catalog?nrCadastral=${encodeURIComponent(nrCadastral)}`,
          );
          if (!res.ok) return false;
          const data = (await res.json()) as { isFresh?: boolean };
          return Boolean(data?.isFresh);
        } catch {
          return false;
        }
      })(),
    );
  }
  const results = await Promise.all(checks);
  return results.some(Boolean);
}

// Per-parcel order placement. The two endpoints take different body
// shapes; we normalize at the call site here.
export async function placeCfOrder(
  useGisAc: boolean,
  parcel: {
    nrCadastral: string;
    nrCF?: string | null;
    siruta?: string | null;
    judetName: string;
    uatName: string;
    gisFeatureId?: string;
  },
): Promise<{ ok: boolean; error?: string }> {
  // See EPAY_ORDERING_VIA_GIS_AC — gis-api can't fulfill paid orders yet,
  // so the pilot flag alone must NOT route ordering away from the queue.
  if (useGisAc && EPAY_ORDERING_VIA_GIS_AC) {
    try {
      const res = await fetch("/api/cf/order", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({
          nrCadastral: parcel.nrCadastral,
          siruta: parcel.siruta ?? undefined,
          gisFeatureId: parcel.gisFeatureId,
        }),
      });
      const data = (await res.json()) as { error?: string };
      // 409 catalog_hit is a "soft success": the user already has (or shares
      // access to) a fresh extract for this cadastral. The UI should reflect
      // that as "Extras CF valid", same as if we just created one.
      if (res.status === 409 && data?.error === "catalog_hit") {
        return { ok: true };
      }
      if (!res.ok || data.error) {
        return { ok: false, error: data.error ?? "Eroare comanda" };
      }
      return { ok: true };
    } catch {
      return { ok: false, error: "Eroare retea" };
    }
  }
  // Legacy path — preserved verbatim from the existing component.
  try {
    const res = await fetch("/api/ancpi/order", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify({
        parcels: [
          {
            nrCadastral: parcel.nrCadastral,
            nrCF: parcel.nrCF ?? null,
            siruta: parcel.siruta ?? null,
            judetIndex: 0,
            judetName: parcel.judetName,
            uatId: 0,
            uatName: parcel.uatName,
          },
        ],
      }),
    });
    const data = (await res.json()) as { error?: string };
    if (!res.ok || data.error) {
      return { ok: false, error: data.error ?? "Eroare comanda" };
    }
    return { ok: true };
  } catch {
    return { ok: false, error: "Eroare retea" };
  }
}

// Per-row download URL. Two call shapes:
//   - cfDownloadUrl(row)              — new, type-aware (preferred).
//     Routes intern → /api/cf, ePay → /api/ancpi regardless of pilot flag.
//   - cfDownloadUrl(useGisAc, id)     — legacy, falls back to the
//     old per-pilot split. Kept for unchanged call sites that don't
//     have the full row.
export function cfDownloadUrl(
  a: { id: string; type?: "epay" | "intern" } | boolean,
  b?: string,
): string {
  if (typeof a === "boolean") {
    const id = b ?? "";
    return a
      ? `/api/cf/${encodeURIComponent(id)}/pdf`
      : `/api/ancpi/download?id=${id}`;
  }
  return a.type === "intern"
    ? `/api/cf/${encodeURIComponent(a.id)}/pdf`
    : `/api/ancpi/download?id=${a.id}`;
}