import { describe, expect, it } from "vitest";
import { Timestamp } from "firebase-admin/firestore";
import {
  EMPTY_WALLET_DTO,
  toLedgerEntryDto,
  toOrderDto,
  toWalletDto,
} from "../../src/types/dto/rewardDto";
import { PointLedgerType, type PointLedgerEntry, type WalletDoc } from "../../src/types/points";
import type { OrderDoc } from "../../src/types/reward";

const UTC_ISO = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d{3}Z$/;

const ts = (iso: string) => Timestamp.fromDate(new Date(iso));

/** 와이어에 실제로 나가는 모양. Timestamp 유출은 여기서만 드러난다. */
function wire(dto: unknown): Record<string, unknown> {
  return JSON.parse(JSON.stringify(dto));
}

/** 중첩 구조 어디에도 admin SDK Timestamp 의 내부 필드가 남아 있지 않은지 확인. */
function expectNoTimestampLeak(dto: unknown): void {
  const json = JSON.stringify(dto);
  expect(json).not.toContain("_seconds");
  expect(json).not.toContain("_nanoseconds");
}

const wallet: WalletDoc = {
  availableBalance: 1200,
  reservedBalance: 300,
  totalEarned: 5000,
  totalSpent: 3500,
  version: 7,
  createdAt: ts("2026-01-02T03:04:05.678Z"),
  updatedAt: ts("2026-07-20T05:30:00.000Z"),
};

const ledgerEntry: PointLedgerEntry = {
  txId: "uid:2026-07-20:attendance_daily",
  uid: "uid",
  type: PointLedgerType.AttendanceDaily,
  op: "credit",
  amount: 20,
  availableBefore: 1180,
  availableAfter: 1200,
  reservedBefore: 300,
  reservedAfter: 300,
  relatedDate: "2026-07-20",
  createdAt: ts("2026-07-20T05:30:00.000Z"),
};

const baseOrder: OrderDoc = {
  uid: "uid",
  items: [{ productId: "p1", qty: 2, pointPrice: 500, name: "굿즈" }],
  totalPoints: 1000,
  recipient: { name: "홍길동", phone: "01000000000", address1: "서울", postalCode: "00000" },
  status: "reserved",
  clientIdempotencyKey: "key-1",
  reserveLedgerTxIds: ["uid:order:o1:reserve"],
  orderedAt: ts("2026-07-20T05:30:00.000Z"),
  statusHistory: [{ status: "reserved", at: ts("2026-07-20T05:30:00.000Z"), actor: "uid" }],
  createdAt: ts("2026-07-20T05:30:00.000Z"),
  updatedAt: ts("2026-07-20T05:30:00.000Z"),
};

describe("toWalletDto", () => {
  it("날짜를 UTC ISO 문자열로 내보내고 Timestamp 를 유출하지 않는다", () => {
    const dto = toWalletDto(wallet);
    expectNoTimestampLeak(dto);
    expect(wire(dto)).toEqual({
      availableBalance: 1200,
      reservedBalance: 300,
      totalEarned: 5000,
      totalSpent: 3500,
      version: 7,
      createdAt: "2026-01-02T03:04:05.678Z",
      updatedAt: "2026-07-20T05:30:00.000Z",
    });
  });

  it("지갑 문서가 없는 유저는 잔액 0 응답을 쓴다", () => {
    expect(wire(EMPTY_WALLET_DTO)).toEqual({
      availableBalance: 0,
      reservedBalance: 0,
      totalEarned: 0,
      totalSpent: 0,
      version: 0,
    });
  });
});

describe("toLedgerEntryDto", () => {
  it("createdAt 이 UTC ISO 문자열이고 문서 id 가 붙는다", () => {
    const dto = toLedgerEntryDto("entry-1", ledgerEntry);
    expectNoTimestampLeak(dto);
    expect(dto.id).toBe("entry-1");
    expect(dto.createdAt).toMatch(UTC_ISO);
    expect(dto.createdAt).toBe("2026-07-20T05:30:00.000Z");
  });

  it("relatedDate 의 YYYY-MM-DD 형식은 그대로 둔다", () => {
    expect(toLedgerEntryDto("entry-1", ledgerEntry).relatedDate).toBe("2026-07-20");
  });

  it("선택 필드가 없으면 응답에서 키가 사라진다", () => {
    const minimal: PointLedgerEntry = { ...ledgerEntry, relatedDate: undefined };
    const json = wire(toLedgerEntryDto("entry-1", minimal));
    expect(json).not.toHaveProperty("relatedDate");
    expect(json).not.toHaveProperty("orderId");
  });
});

describe("toOrderDto", () => {
  it("중첩된 statusHistory 까지 UTC ISO 문자열로 바꾼다", () => {
    const dto = toOrderDto("o1", baseOrder);
    expectNoTimestampLeak(dto);
    expect(dto.orderedAt).toMatch(UTC_ISO);
    expect(dto.createdAt).toMatch(UTC_ISO);
    expect(dto.updatedAt).toMatch(UTC_ISO);
    expect(dto.statusHistory[0].at).toMatch(UTC_ISO);
    expect(dto.statusHistory[0].at).toBe("2026-07-20T05:30:00.000Z");
  });

  it("선택 날짜 필드가 채워지면 모두 문자열로 나간다", () => {
    const settled: OrderDoc = {
      ...baseOrder,
      status: "refunded",
      cancelledBy: "admin",
      cancelledAt: ts("2026-07-21T00:00:00.000Z"),
      confirmedAt: ts("2026-07-22T00:00:00.000Z"),
      refundedAt: ts("2026-07-23T00:00:00.000Z"),
    };
    const dto = toOrderDto("o1", settled);
    expectNoTimestampLeak(dto);
    for (const value of [dto.cancelledAt, dto.confirmedAt, dto.refundedAt]) {
      expect(value).toMatch(UTC_ISO);
    }
  });

  it("선택 날짜 필드가 비면 응답에서 키가 사라진다", () => {
    const json = wire(toOrderDto("o1", baseOrder));
    expect(json).not.toHaveProperty("cancelledAt");
    expect(json).not.toHaveProperty("confirmedAt");
    expect(json).not.toHaveProperty("refundedAt");
    expect(json).not.toHaveProperty("cancelledBy");
  });

  it("문서에 없는 필드를 임의로 흘려보내지 않는다", () => {
    const polluted = { ...baseOrder, internalOnly: "secret" } as OrderDoc;
    expect(wire(toOrderDto("o1", polluted))).not.toHaveProperty("internalOnly");
  });
});