import { beforeAll, describe, expect, it } from "vitest";
import { Timestamp } from "firebase-admin/firestore";
import { auth, firestore } from "../../src/firebase";
import { appointAdmin, listAdminUsers, searchAdminUsers } from "../../src/services/adminUserService";

// 다른 테스트가 만드는 users 문서와 섞이지 않도록 고유 접두어를 쓴다.
const PREFIX = "검색전용";

const seedUsers = [
  {
    uid: "admin-user-search-test-1",
    displayName: `${PREFIX}호랑이`,
    email: "search-test-1@example.com",
    provider: "google",
    active: true,
    createdAt: Timestamp.fromDate(new Date("2026-07-01T00:00:00Z")),
  },
  {
    uid: "admin-user-search-test-2",
    displayName: `${PREFIX}독수리`,
    email: "search-test-2@example.com",
    provider: "apple",
    photoUrl: "https://example.com/p.png",
    active: false,
    deactivatedAt: Timestamp.fromDate(new Date("2026-07-10T00:00:00Z")),
    createdAt: Timestamp.fromDate(new Date("2026-07-02T00:00:00Z")),
  },
] as const;

beforeAll(async () => {
  for (const { uid, ...doc } of seedUsers) {
    await firestore.doc(`users/${uid}`).set(doc);
    await auth.createUser({ uid, email: doc.email, displayName: doc.displayName });
  }
});

describe("searchAdminUsers", () => {
  it("displayName 접두어로 검색되고 날짜는 UTC ISO 문자열로 나온다", async () => {
    const results = await searchAdminUsers(PREFIX, 10);
    const uids = results.map((u) => u.uid);
    expect(uids).toContain("admin-user-search-test-1");
    expect(uids).toContain("admin-user-search-test-2");

    for (const dto of results) {
      // Timestamp 인스턴스/_seconds 누출 금지 — 어드민 웹이 브라우저에서 그대로 소비한다.
      expect(typeof dto.createdAt).toBe("string");
      expect(dto.createdAt?.endsWith("Z")).toBe(true);
    }
  });

  it("비활성 유저도 검색되며 active=false 로 표시된다", async () => {
    const results = await searchAdminUsers(`${PREFIX}독수리`, 10);
    expect(results).toHaveLength(1);
    expect(results[0]).toMatchObject({
      uid: "admin-user-search-test-2",
      active: false,
      photoUrl: "https://example.com/p.png",
    });
    expect(typeof results[0].deactivatedAt).toBe("string");
  });

  it("uid 정확 일치로도 찾는다", async () => {
    const results = await searchAdminUsers("admin-user-search-test-1", 10);
    expect(results[0]?.uid).toBe("admin-user-search-test-1");
    expect(results[0]?.displayName).toBe(`${PREFIX}호랑이`);
    expect(results[0]?.isAdmin).toBe(false);
  });

  it("빈 q 는 400", async () => {
    await expect(searchAdminUsers("  ", 10)).rejects.toMatchObject({ status: 400 });
  });
});

describe("appointAdmin", () => {
  it("기존 custom claims를 보존하면서 관리자 권한을 부여하고 재호출은 멱등이다", async () => {
    const uid = "admin-user-search-test-1";
    await auth.setCustomUserClaims(uid, { betaTester: true });

    await expect(appointAdmin(uid, "granting-admin")).resolves.toEqual({
      uid,
      isAdmin: true,
      alreadyAdmin: false,
    });
    const record = await auth.getUser(uid);
    expect(record.customClaims).toMatchObject({
      betaTester: true,
      admin: true,
    });
    await expect(appointAdmin(uid, "granting-admin")).resolves.toMatchObject({
      isAdmin: true,
      alreadyAdmin: true,
    });
    const [dto] = await searchAdminUsers(uid, 10);
    expect(dto.isAdmin).toBe(true);
  });

  it("비활성 유저는 관리자로 임명할 수 없다", async () => {
    await expect(
      appointAdmin("admin-user-search-test-2", "granting-admin")
    ).rejects.toMatchObject({ status: 409, code: "INACTIVE_USER" });
  });
});

describe("listAdminUsers", () => {
  it("가입일 내림차순 + 커서 페이지네이션", async () => {
    const first = await listAdminUsers(1);
    expect(first.items).toHaveLength(1);
    expect(first.cursor).toBe(first.items[0].uid);

    const second = await listAdminUsers(1, first.cursor ?? undefined);
    if (second.items.length > 0) {
      const firstDate = first.items[0].createdAt ?? "";
      const secondDate = second.items[0].createdAt ?? "";
      expect(secondDate <= firstDate).toBe(true);
      expect(second.items[0].uid).not.toBe(first.items[0].uid);
    }
  });
});