import { describe, expect, it } from "vitest";
import { Timestamp } from "firebase-admin/firestore";
import {
  EMPTY_WALLET_DTO,
  toAdminProductDto,
  toLedgerEntryDto,
  toOrderDto,
  toWalletDto,
} from "../../src/types/dto/rewardDto";
import { PointLedgerType, type PointLedgerEntry, type WalletDoc } from "../../src/types/points";
import type { OrderDoc, ProductDoc } 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,
  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,
  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: "confirmed",
  clientIdempotencyKey: "key-1",
  debitLedgerTxId: "uid:order:o1:debit",
  orderedAt: ts("2026-07-20T05:30:00.000Z"),
  confirmedAt: ts("2026-07-20T05:30:00.000Z"),
  statusHistory: [{ status: "confirmed", 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,
      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,
      totalEarned: 0,
      totalSpent: 0,
      version: 0,
    });
  });
});

describe("toLedgerEntryDto", () => {
  it("createdAt 이 UTC ISO 문자열이고 문서 id 가 붙는다", () => {
    const dto = toLedgerEntryDto("entry-1", "uid", 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", "uid", 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", "uid", 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("환불 주문은 refundedAt 도 문자열로 나간다", () => {
    const settled: OrderDoc = {
      ...baseOrder,
      status: "refunded",
      refundReason: "고객 요청으로 교환 취소",
      refundedAt: ts("2026-07-23T00:00:00.000Z"),
      statusHistory: [
        ...baseOrder.statusHistory,
        {
          status: "refunded",
          at: ts("2026-07-23T00:00:00.000Z"),
          actor: "admin-uid",
          refundReason: "고객 요청으로 교환 취소",
        },
      ],
    };
    const dto = toOrderDto("o1", settled);
    expectNoTimestampLeak(dto);
    expect(dto.confirmedAt).toMatch(UTC_ISO);
    expect(dto.refundedAt).toMatch(UTC_ISO);
    expect(dto.refundReason).toBe("고객 요청으로 교환 취소");
    expect(dto.statusHistory[1].refundReason).toBe("고객 요청으로 교환 취소");
  });

  it("환불 전에는 refundedAt 키가 응답에서 사라진다", () => {
    const json = wire(toOrderDto("o1", baseOrder));
    expect(json).not.toHaveProperty("refundedAt");
    expect(json).not.toHaveProperty("refundReason");
  });

  it("배송 정보와 배송 시각을 명시적으로 내보낸다", () => {
    const shippedAt = ts("2026-07-21T02:00:00.000Z");
    const shipmentUpdatedAt = ts("2026-07-21T03:00:00.000Z");
    const shipped: OrderDoc = {
      ...baseOrder,
      status: "shipped",
      shipment: { carrier: "CJ대한통운", trackingNumber: "1234567890" },
      shippedAt,
      statusHistory: [
        ...baseOrder.statusHistory,
        {
          status: "shipped",
          at: shippedAt,
          actor: "shipping-admin",
          shipment: { carrier: "CJ대한통운", trackingNumber: "1234567890" },
          shipmentUpdatedAt,
          shipmentUpdatedBy: "shipment-editor",
        },
      ],
    };
    const json = wire(toOrderDto("o1", shipped));
    expect(json.shipment).toEqual({ carrier: "CJ대한통운", trackingNumber: "1234567890" });
    expect(json.shippedAt).toBe("2026-07-21T02:00:00.000Z");
    expect(json.statusHistory[1]).toMatchObject({
      shipment: { carrier: "CJ대한통운", trackingNumber: "1234567890" },
      shipmentUpdatedAt: "2026-07-21T03:00:00.000Z",
      shipmentUpdatedBy: "shipment-editor",
    });
  });

  it("배송 전에는 배송 정보와 배송 시각 키가 응답에서 사라진다", () => {
    const json = wire(toOrderDto("o1", baseOrder));
    expect(json).not.toHaveProperty("shipment");
    expect(json).not.toHaveProperty("shippedAt");
    expect(json).not.toHaveProperty("deliveredAt");
  });

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

  it("옵션 스냅샷이 있으면 항목에 optionId/optionName 을 그대로 내보낸다", () => {
    const withOption: OrderDoc = {
      ...baseOrder,
      items: [{ productId: "p1", qty: 1, pointPrice: 500, name: "키링", optionId: "blue", optionName: "블루" }],
    };
    const json = wire(toOrderDto("o1", withOption));
    expect(json.items).toEqual([
      { productId: "p1", qty: 1, pointPrice: 500, name: "키링", optionId: "blue", optionName: "블루" },
    ]);
  });

  it("옵션이 없는 항목은 응답에서 optionId/optionName 키가 사라진다", () => {
    const json = wire(toOrderDto("o1", baseOrder)) as { items: Array<Record<string, unknown>> };
    expect(json.items[0]).not.toHaveProperty("optionId");
    expect(json.items[0]).not.toHaveProperty("optionName");
  });
});

describe("toAdminProductDto", () => {
  const baseProduct: ProductDoc = {
    name: "아크릴 키링",
    pointPrice: 3000,
    active: false,
    redeemable: false,
    displayOrder: 1,
    mainImages: ["https://example.com/main.png"],
    detailImages: ["https://example.com/detail.png"],
    createdAt: ts("2026-01-01T00:00:00.000Z"),
    updatedAt: ts("2026-07-20T05:30:00.000Z"),
  };

  it("active/redeemable 이 false 인 비노출 상품도 그대로 응답에 포함한다", () => {
    const dto = toAdminProductDto("acrylic-keyring", baseProduct);
    expect(dto.active).toBe(false);
    expect(dto.redeemable).toBe(false);
  });

  it("Timestamp 를 유출하지 않고 UTC ISO(Z) 문자열로 내보낸다", () => {
    const dto = toAdminProductDto("acrylic-keyring", baseProduct);
    expectNoTimestampLeak(dto);
    expect(dto.createdAt).toMatch(UTC_ISO);
    expect(dto.updatedAt).toMatch(UTC_ISO);
    expect(dto.createdAt).toBe("2026-01-01T00:00:00.000Z");
    expect(dto.updatedAt).toBe("2026-07-20T05:30:00.000Z");
  });

  it("옵션이 있으면 optionLabel/options 를 포함한다", () => {
    const withOptions: ProductDoc = {
      ...baseProduct,
      optionLabel: "색상",
      options: [{ id: "blue", name: "블루" }],
    };
    const json = wire(toAdminProductDto("p1", withOptions));
    expect(json.optionLabel).toBe("색상");
    expect(json.options).toEqual([{ id: "blue", name: "블루", active: true }]);
  });

  it("옵션 활성 상태를 어드민 응답에 명시한다", () => {
    const withOptions: ProductDoc = {
      ...baseProduct,
      optionLabel: "색상",
      options: [
        { id: "blue", name: "블루" },
        { id: "red", name: "레드", active: false },
      ],
    };
    const json = wire(toAdminProductDto("p1", withOptions));
    expect(json.options).toEqual([
      { id: "blue", name: "블루", active: true },
      { id: "red", name: "레드", active: false },
    ]);
  });

  it("옵션이 없으면 optionLabel/options 키가 응답에서 사라진다", () => {
    const json = wire(toAdminProductDto("p1", baseProduct));
    expect(json).not.toHaveProperty("optionLabel");
    expect(json).not.toHaveProperty("options");
  });

  it("문서에 없는 필드를 임의로 흘려보내지 않는다", () => {
    const polluted = { ...baseProduct, internalOnly: "secret" } as ProductDoc;
    expect(wire(toAdminProductDto("p1", polluted))).not.toHaveProperty("internalOnly");
  });
});