import { beforeEach, describe, expect, it } from "vitest";
import type { DecodedIdToken } from "firebase-admin/auth";
import { firestore } from "../../src/firebase.js";
import { createMe, getMe } from "../../src/services/userService.js";
import { HttpError } from "../../src/middleware/errors.js";

const uid = "user-1";

function fakeToken(overrides: Partial<DecodedIdToken> = {}): DecodedIdToken {
  return {
    uid,
    email: "tester@example.com",
    picture: "https://cdn.example.com/p.png",
    firebase: {
      identities: {},
      sign_in_provider: "google.com",
    },
    aud: "test",
    auth_time: 0,
    exp: 0,
    iat: 0,
    iss: "test",
    sub: uid,
    ...overrides,
  } as DecodedIdToken;
}

const validBody = {
  displayName: "유저1",
  favoriteTeamCode: "LG",
  knowledgeLevel: "casual",
};

describe("userService", () => {
  beforeEach(async () => {
    await firestore.recursiveDelete(firestore.collection("users"));
  });

  describe("getMe", () => {
    it("미존재 유저는 404 + USER_NOT_FOUND", async () => {
      await expect(getMe(uid)).rejects.toMatchObject({
        status: 404,
        code: "USER_NOT_FOUND",
      });
    });

    it("존재하는 유저를 반환한다", async () => {
      await createMe(fakeToken(), validBody);
      const u = await getMe(uid);
      expect(u.displayName).toBe("유저1");
      expect(u.favoriteTeamCode).toBe("LG");
      expect(u.knowledgeLevel).toBe("casual");
    });
  });

  describe("createMe", () => {
    it("정상 생성 시 토큰의 email/photo/provider를 사용한다", async () => {
      const u = await createMe(fakeToken(), validBody);
      expect(u.email).toBe("tester@example.com");
      expect(u.photoUrl).toBe("https://cdn.example.com/p.png");
      expect(u.provider).toBe("google");
      expect(u.favoriteTeamCode).toBe("LG");
      expect(u.knowledgeLevel).toBe("casual");
    });

    it("apple.com 프로바이더 매핑", async () => {
      const t = fakeToken({
        firebase: { identities: {}, sign_in_provider: "apple.com" },
      });
      const u = await createMe(t, validBody);
      expect(u.provider).toBe("apple");
    });

    it("중복 생성 시 409 + USER_ALREADY_EXISTS", async () => {
      await createMe(fakeToken(), validBody);
      await expect(createMe(fakeToken(), validBody)).rejects.toMatchObject({
        status: 409,
        code: "USER_ALREADY_EXISTS",
      });
    });

    it.each([
      ["빈 displayName", { ...validBody, displayName: "" }],
      ["11자 displayName", { ...validBody, displayName: "1234567890X" }],
      ["숫자 displayName", { ...validBody, displayName: 123 }],
      ["잘못된 팀코드", { ...validBody, favoriteTeamCode: "XX" }],
      ["잘못된 레벨", { ...validBody, knowledgeLevel: "master" }],
    ])("%s → 400 INVALID_INPUT", async (_label, body) => {
      await expect(createMe(fakeToken(), body as never)).rejects.toMatchObject({
        status: 400,
        code: "INVALID_INPUT",
      });
    });

    it("지원하지 않는 provider → 400", async () => {
      const t = fakeToken({
        firebase: { identities: {}, sign_in_provider: "password" },
      });
      await expect(createMe(t, validBody)).rejects.toBeInstanceOf(HttpError);
    });
  });
});