const { encryptStringOrThrow, decryptStringOrThrow } = require("../../../src/services/crypto");
const { normalizeBankSlip } = require("../../../src/services/paymentReceiptMatching");
const { buildVerificationData, claimVerifiedReceipts, transactionFingerprint, canRetryReceiptRecognition } = require("../../../src/services/paymentReceiptVerification");
const { syntheticDocumentEvidence } = require("../../../../scripts/qa/synthetic-bank-receipt.cjs");

const config = { fieldEncryptionKey: Buffer.alloc(32, 7).toString("base64") };

function fixture() {
  const page = { pageNumber: 1, ...normalizeBankSlip(Object.entries({
    小写金额: "10.00", 币别: "人民币", 付款人账号: "000011112222",
    收款人账号: "000033334444", 单据状态: "交易成功", 凭证号: "SYN-REF",
  }).map(([Name, Value]) => ({ Name, Value }))), document: syntheticDocumentEvidence() };
  const batch = {
    id: "batch", entity_type: "reimbursement",
    payment_account_snapshot_json: { bankInstitutionCode: "CCB", accountNumberEncrypted: encryptStringOrThrow(config, page.payerAccount) },
    items: [{ id: "item", status: "pending", amount: "10.00", currency_code: "CNY",
      snapshot_json: { payee: { bankInstitutionCode: "CCB", bankAccountEncrypted: encryptStringOrThrow(config, page.payeeAccount) } } }],
  };
  const attachment = { id: "attachment", payment_batch_id: batch.id, file_sha256: "a".repeat(64), governance_status: "approved", archived_at: null, receipt_ocr_version: 0 };
  const recognition = { status: "recognized", pagesExpected: 1, pagesProcessed: 1, pages: [page] };
  const data = buildVerificationData(config, batch, attachment, recognition);
  const verification = { ...data, id: "verification", attachment, matches: data.matches.create };
  const tx = {
    $queryRaw: vi.fn().mockResolvedValue([{ id: attachment.id }]),
    paymentReceiptVerification: { findFirst: vi.fn().mockResolvedValue(verification) },
    loanBankEventClaim: { count: vi.fn().mockResolvedValue(0) },
    paymentReceiptClaim: { count: vi.fn().mockResolvedValue(0), findMany: vi.fn().mockResolvedValue([]), create: vi.fn() },
    paymentReceiptTransactionAlias: { count: vi.fn().mockResolvedValue(0), findMany: vi.fn().mockResolvedValue([]), create: vi.fn() },
    paymentReceiptManualProposal: { findMany: vi.fn().mockResolvedValue([]) },
  };
  return { batch, attachment, recognition, data, verification, tx };
}

describe("receipt evidence and transaction claims", () => {
  test.each([null, { version: 0 }, { ...syntheticDocumentEvidence(), kind: "non_final" },
    { ...syntheticDocumentEvidence(), direction: "credit" }, { ...syntheticDocumentEvidence(), explicitSuccess: false }])(
    "field matches alone cannot prove final payment (%j)", (document) => {
      const { batch, attachment, recognition } = fixture();
      recognition.pages[0].document = document;
      const data = buildVerificationData(config, batch, attachment, recognition);
      expect(data.status).toBe("needs_review");
      expect(data.matches).toBeUndefined();
    });

  test("final claim rebuild rejects an old matched record with no document basis", async () => {
    const { tx, batch, verification, recognition } = fixture();
    delete recognition.pages[0].document;
    verification.normalized_encrypted = encryptStringOrThrow(config, JSON.stringify(recognition));
    await expect(claimVerifiedReceipts(tx, config, batch)).rejects.toMatchObject({ code: "receipt_match_changed" });
    expect(tx.paymentReceiptClaim.create).not.toHaveBeenCalled();
  });
  test("bank transactions already used for supplements or returns cannot be claimed again", async () => {
    const { tx, batch } = fixture();
    tx.loanBankEventClaim.count.mockResolvedValue(1);
    await expect(claimVerifiedReceipts(tx, config, batch)).rejects.toMatchObject({ code: "receipt_transaction_reused" });
    expect(tx.paymentReceiptClaim.create).not.toHaveBeenCalled();
  });
  test("mixed historical cash items do not require bank snapshots or bank receipt claims", async () => {
    const { batch, attachment, recognition, tx } = fixture();
    batch.items.push({ id: "cash-item", status: "pending", amount: "10.00", currency_code: "CNY",
      payment_channel_override: "cash", snapshot_json: {} });
    expect(buildVerificationData(config, batch, attachment, recognition).status).toBe("matched");
    await claimVerifiedReceipts(tx, config, batch);
    expect(tx.paymentReceiptClaim.create).toHaveBeenCalledTimes(1);
    expect(tx.paymentReceiptClaim.create.mock.calls[0][0].data.item_id).toBe("item");
  });
  test.each([[899999, false], [900000, true], [900001, true]])("retry becomes available only at timeout %s", (age, allowed) => {
    const now = new Date("2026-09-14T00:00:00Z");
    const attachment = { receipt_ocr_state: "processing", governance_status: "approved",
      receipt_ocr_started_at: new Date(now.getTime() - age) };
    expect(canRetryReceiptRecognition(attachment, now)).toBe(allowed);
    expect(canRetryReceiptRecognition({ ...attachment, archived_at: now }, now)).toBe(false);
  });
  test("stores only encrypted normalized evidence and keyed transaction identity", () => {
    const { data, recognition } = fixture();
    expect(JSON.stringify(data)).not.toContain("000011112222");
    expect(JSON.stringify(data)).not.toContain("SYN-REF");
    expect(JSON.parse(decryptStringOrThrow(config, data.normalized_encrypted))).toEqual(recognition);
    expect(data.matches.create[0].fingerprint).toMatch(/^[a-f0-9]{64}$/);
  });

  test("transaction identity is independent of file, amount and payee", () => {
    const { recognition } = fixture();
    const page = recognition.pages[0];
    expect(transactionFingerprint(config, page)).toEqual(transactionFingerprint(config, { ...page, amount: "2000", payeeAccount: "999999999999" }));
    expect(transactionFingerprint(config, page)).not.toEqual(transactionFingerprint(config, { ...page, payerAccount: "999999999999" }));
  });

  test("does not persist extra provider response fields even encrypted", () => {
    const { batch, attachment, recognition } = fixture();
    const data = buildVerificationData(config, batch, attachment, { ...recognition, RawSensitive: "provider-extra" });
    expect(decryptStringOrThrow(config, data.normalized_encrypted)).not.toContain("provider-extra");
  });

  test("does not match partial pages", () => {
    const { batch, attachment, recognition } = fixture();
    expect(buildVerificationData(config, batch, attachment, { ...recognition, pagesExpected: 2 }).status).toBe("needs_review");
  });

  test("requires different items and transaction identities across pages", () => {
    const { batch, attachment, recognition } = fixture();
    const duplicated = { ...recognition, pagesExpected: 2, pagesProcessed: 2,
      pages: [recognition.pages[0], { ...recognition.pages[0], pageNumber: 2 }] };
    expect(buildVerificationData(config, batch, attachment, duplicated).status).toBe("needs_review");
  });

  test("claims a verified item inside supplied transaction", async () => {
    const { tx, batch } = fixture();
    await claimVerifiedReceipts(tx, config, batch);
    expect(tx.paymentReceiptClaim.create).toHaveBeenCalledTimes(1);
    expect(tx.paymentReceiptClaim.create.mock.calls[0][0].data.item_id).toBe("item");
    expect(tx.$queryRaw).toHaveBeenCalledTimes(2);
  });

  test("idempotent claim does not insert again", async () => {
    const { tx, batch, verification } = fixture();
    tx.paymentReceiptClaim.findMany.mockResolvedValue([verification.matches[0]]);
    await claimVerifiedReceipts(tx, config, batch);
    expect(tx.paymentReceiptClaim.create).not.toHaveBeenCalled();
  });

  test("cannot reuse transaction in another item or batch", async () => {
    const { tx, batch, verification } = fixture();
    tx.paymentReceiptClaim.findMany.mockResolvedValue([{ ...verification.matches[0], item_id: "other-item" }]);
    await expect(claimVerifiedReceipts(tx, config, batch)).rejects.toMatchObject({ code: "receipt_transaction_reused" });
    expect(tx.paymentReceiptClaim.create).not.toHaveBeenCalled();
  });

  test("key rotation cannot bypass historical duplicate detection", async () => {
    const { tx, batch } = fixture();
    tx.paymentReceiptClaim.count.mockResolvedValue(1);
    await expect(claimVerifiedReceipts(tx, config, batch)).rejects.toMatchObject({ code: "receipt_key_rotation_required" });
    expect(tx.paymentReceiptClaim.create).not.toHaveBeenCalled();
  });

  test.each(["archived", "quarantined", "hash_changed", "latest_failed"])("rejects unavailable evidence: %s", async (reason) => {
    const { tx, batch, verification } = fixture();
    if (reason === "archived") verification.attachment.archived_at = new Date();
    if (reason === "quarantined") verification.attachment.governance_status = "quarantined";
    if (reason === "hash_changed") verification.attachment.file_sha256 = "b".repeat(64);
    if (reason === "latest_failed") verification.status = "needs_review";
    await expect(claimVerifiedReceipts(tx, config, batch)).rejects.toMatchObject({ code: "receipt_verification_required" });
    expect(tx.paymentReceiptClaim.create).not.toHaveBeenCalled();
  });

  test("re-evaluates frozen amount rather than trusting persisted matched flag", async () => {
    const { tx, batch } = fixture();
    batch.items[0].amount = "11.00";
    await expect(claimVerifiedReceipts(tx, config, batch)).rejects.toMatchObject({ code: "receipt_match_changed" });
  });

  test("checks persisted fingerprint against encrypted evidence", async () => {
    const { tx, batch, verification } = fixture();
    verification.matches[0].fingerprint = "f".repeat(64);
    await expect(claimVerifiedReceipts(tx, config, batch)).rejects.toMatchObject({ code: "receipt_match_changed" });
  });

  test("does not reopen already executed items", async () => {
    const { tx, batch } = fixture();
    batch.items[0].status = "executed";
    await claimVerifiedReceipts(tx, config, batch);
    expect(tx.$queryRaw).not.toHaveBeenCalled();
  });
});