import { INestApplication } from '@nestjs/common';
import request from 'supertest';
import type { Response } from 'supertest';
import { App } from 'supertest/types';
import { DataSource } from 'typeorm';

import { createE2eApp, devLogin, uniqueDeviceKey } from './support/e2e-app';

/**
 * 일정 연동 — 초대 코드로 묶이고, 서로의 일정을 보고 고치고, 해제하면 나만 빠진다.
 * 회원 여럿을 개발용 로그인으로 만들고 끝나면 모두 탈퇴한다.
 */

/** 1×1 PNG — 업로드가 매직 바이트를 확인하므로 진짜 PNG 여야 한다 */
const TINY_PNG = Buffer.from(
  'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNkYPhfDwAChwGA60e6kgAAAABJRU5ErkJggg==',
  'base64',
);

interface SharingBody {
  inviteCode: string;
  linked: boolean;
  maxMembers: number;
  members: { userId: string; nickname: string | null; isMe: boolean }[];
}

interface Target {
  id: string;
  name: string | null;
  photoFileId: string | null;
  tint: string | null;
}

interface EventBody {
  id: string;
  title: string;
  isDone: boolean;
  ownerId: string;
  owner: { userId: string; nickname: string | null };
  targets: Target[];
}

interface RuleBody {
  id: string;
  ownerId: string;
  targets: Target[];
}

/** supertest 의 body 는 any 이므로 계약 형태로 좁혀서 읽는다 */
const data = <T>(res: Response): T => (res.body as { data: T }).data;
const errorCode = (res: Response): string | undefined =>
  (res.body as { error?: { code?: string } }).error?.code;

describe('일정 연동 (e2e)', () => {
  let app: INestApplication<App>;
  const tokens: Record<string, string> = {};
  const ids: Record<string, string> = {};
  const codes: Record<string, string> = {};
  const people = ['a', 'b', 'c', 'd', 'e'] as const;
  type Person = (typeof people)[number];

  const as = (who: Person) => ({ Authorization: `Bearer ${tokens[who]}` });
  const http = () => request(app.getHttpServer());

  let petId = '';
  let petPhotoId = '';
  let profilePhotoId = '';
  let eventId = '';
  let ruleId = '';

  const uploadPng = async (who: Person): Promise<string> => {
    const res = await http()
      .post('/api/files')
      .set(as(who))
      .attach('file', TINY_PNG, {
        filename: 'photo.png',
        contentType: 'image/png',
      })
      .expect(201);
    return data<{ id: string }>(res).id;
  };
  const sharing = async (who: Person): Promise<SharingBody> =>
    data<SharingBody>(
      await http().get('/api/calendar-sharing').set(as(who)).expect(200),
    );
  const join = (who: Person, code: string) =>
    http().post('/api/calendar-memberships').set(as(who)).send({ code });
  const leave = (who: Person) =>
    http().delete('/api/calendar-membership').set(as(who)).expect(204);
  const eventsOf = async (who: Person): Promise<EventBody[]> =>
    data<{ items: EventBody[] }>(
      await http()
        .get('/api/schedule-events?limit=100')
        .set(as(who))
        .expect(200),
    ).items;
  const memberIds = (body: SharingBody) => body.members.map((m) => m.userId);

  beforeAll(async () => {
    app = await createE2eApp();
    for (const who of people) {
      tokens[who] = await devLogin(app, uniqueDeviceKey(`cal-${who}`));
      const me = await http()
        .patch('/api/users/me')
        .set(as(who))
        .send({ nickname: who })
        .expect(200);
      ids[who] = data<{ id: string }>(me).id;
    }
  });

  afterAll(async () => {
    for (const who of people) {
      await http().delete('/api/users/me').set(as(who));
    }
    await app.close();
  });

  it('초대 코드는 처음 열 때 만들어지고 그대로 유지된다', async () => {
    const first = await sharing('a');
    const again = await sharing('a');

    expect(first.inviteCode).toMatch(/^RUP-[A-Z2-9]{6}$/);
    expect(again.inviteCode).toBe(first.inviteCode);
    expect(first).toEqual({
      inviteCode: first.inviteCode,
      linked: false,
      maxMembers: 4,
      members: [
        { userId: ids.a, nickname: 'a', photoFileId: null, isMe: true },
      ],
    });
    for (const who of people) codes[who] = (await sharing(who)).inviteCode;
  });

  it('A 가 자기 아이로 일정·반복 일정을 만든다', async () => {
    petPhotoId = await uploadPng('a');
    profilePhotoId = await uploadPng('a');
    await http()
      .patch('/api/users/me')
      .set(as('a'))
      .send({ photoFileId: profilePhotoId })
      .expect(200);
    const pet = await http()
      .post('/api/pets')
      .set(as('a'))
      .send({
        tint: '#FF9B6A',
        name: '콩이',
        species: '강아지',
        breed: '',
        gender: 'male',
        neutered: true,
        birthDate: '2021-09-14',
        weight: 3.2,
        weightUnit: 'kg',
        allergies: [],
        conditions: [],
        watchConditions: [],
        photoFileId: petPhotoId,
      })
      .expect(201);
    petId = data<{ id: string }>(pet).id;

    const events = await http()
      .post('/api/schedule-events')
      .set(as('a'))
      .send({
        events: [
          {
            date: '2026-10-20',
            title: '콩이 산책',
            kind: 'general',
            category: 'walk',
            targetIds: [petId],
          },
        ],
      })
      .expect(201);
    const [event] = data<EventBody[]>(events);
    eventId = event.id;
    expect(event.ownerId).toBe(ids.a);

    const rule = await http()
      .post('/api/repeat-rules')
      .set(as('a'))
      .send({
        from: '2026-10-01',
        spec: { mode: 'daily', unit: 'day', n: 1 },
        details: {
          title: '심장사상충 약',
          kind: 'general',
          category: 'med',
          targetIds: [petId],
        },
      })
      .expect(201);
    ruleId = data<RuleBody>(rule).id;
  });

  it('B 는 코드를 미리 보고 연동한다 (대소문자 무관)', async () => {
    const preview = await http()
      .get(`/api/calendar-invitations/${codes.a.toLowerCase()}`)
      .set(as('b'))
      .expect(200);
    expect(data(preview)).toEqual({
      ownerNickname: 'a',
      memberCount: 1,
      maxMembers: 4,
      isMine: false,
      isMember: false,
    });

    const joined = await join('b', codes.a).expect(201);
    expect(data<SharingBody>(joined).linked).toBe(true);
    expect(memberIds(data<SharingBody>(joined))).toEqual([ids.b, ids.a]);
    expect(memberIds(await sharing('a'))).toEqual([ids.a, ids.b]);

    const after = await http()
      .get(`/api/calendar-invitations/${codes.a}`)
      .set(as('b'))
      .expect(200);
    expect(data(after)).toMatchObject({ memberCount: 2, isMember: true });
  });

  it('B 는 A 의 일정을 주인·대상과 함께 본다', async () => {
    const event = (await eventsOf('b')).find((e) => e.id === eventId);
    expect(event?.ownerId).toBe(ids.a);
    expect(event?.owner.nickname).toBe('a');
    expect(event?.targets).toEqual([
      { id: petId, name: '콩이', photoFileId: petPhotoId, tint: '#FF9B6A' },
    ]);

    const rules = await http()
      .get('/api/repeat-rules')
      .set(as('b'))
      .expect(200);
    expect(data<{ items: RuleBody[] }>(rules).items.map((r) => r.id)).toContain(
      ruleId,
    );
  });

  it('B 가 A 의 일정을 고치고 완료하면 A 도 그대로 본다', async () => {
    const updated = await http()
      .put(`/api/schedule-events/${eventId}`)
      .set(as('b'))
      .send({
        title: 'B 가 고친 산책',
        kind: 'general',
        category: 'walk',
        targetIds: [petId, 'self'],
      })
      .expect(200);
    // 대상은 일정 주인(A)의 아이와 A 자신으로 확인·표시한다
    expect(data<EventBody>(updated).targets.map((t) => t.name)).toEqual([
      '콩이',
      'a',
    ]);

    await http()
      .put(`/api/schedule-events/${eventId}/completion`)
      .set(as('b'))
      .expect(204);
    await http()
      .put(`/api/repeat-rules/${ruleId}/completions/2026-10-11`)
      .set(as('b'))
      .expect(204);

    const seen = (await eventsOf('a')).find((e) => e.id === eventId);
    expect(seen?.title).toBe('B 가 고친 산책');
    expect(seen?.isDone).toBe(true);

    const completions = await http()
      .get('/api/repeat-rule-completions')
      .set(as('a'))
      .expect(200);
    expect(
      data<{ items: { ruleId: string; date: string }[] }>(completions).items,
    ).toContainEqual({ ruleId, date: '2026-10-11' });
  });

  it('새 일정은 내 아이만 대상으로 한다 — B 가 A 의 아이로 만들면 VAL_001', async () => {
    const res = await http()
      .post('/api/schedule-events')
      .set(as('b'))
      .send({
        events: [
          {
            date: '2026-10-21',
            title: '남의 아이',
            kind: 'general',
            category: 'walk',
            targetIds: [petId],
          },
        ],
      })
      .expect(400);
    expect(errorCode(res)).toBe('VAL_001');
  });

  it('연동한 사람의 프로필·아이 사진은 받고, 바깥 사람은 RES_001', async () => {
    for (const fileId of [petPhotoId, profilePhotoId]) {
      await http().get(`/api/files/${fileId}`).set(as('b')).expect(200);
      const denied = await http()
        .get(`/api/files/${fileId}`)
        .set(as('e'))
        .expect(404);
      expect(errorCode(denied)).toBe('RES_001');
    }
  });

  it('C 도 A 의 코드로 들어와 셋이 된다', async () => {
    const joined = await join('c', codes.a).expect(201);
    expect(memberIds(data<SharingBody>(joined))).toEqual([ids.c, ids.a, ids.b]);
  });

  it('이미 연동된 사람(SCHED_005)·내 코드(SCHED_003)는 거절한다', async () => {
    for (const code of [codes.a, codes.c]) {
      const again = await join('b', code).expect(409);
      expect(errorCode(again)).toBe('SCHED_005');
    }
    const own = await join('a', codes.a).expect(400);
    expect(errorCode(own)).toBe('SCHED_003');
  });

  it('4명이 차면 SCHED_002, 다른 사람과 연동 중이면 SCHED_004', async () => {
    await join('d', codes.a).expect(201);
    const full = await join('e', codes.b).expect(409);
    expect(errorCode(full)).toBe('SCHED_002');

    const busy = await join('b', codes.e).expect(409);
    expect(errorCode(busy)).toBe('SCHED_004');

    await leave('d');
    expect(memberIds(await sharing('a'))).toEqual([ids.a, ids.b, ids.c]);
  });

  it('B 가 해제하면 서로의 일정이 사라지고 B 의 일정은 B 에게 남는다', async () => {
    const mine = await http()
      .post('/api/schedule-events')
      .set(as('b'))
      .send({
        events: [
          {
            date: '2026-10-22',
            title: 'B 의 일정',
            kind: 'general',
            category: 'etc',
            targetIds: ['self'],
          },
        ],
      })
      .expect(201);
    const [bEvent] = data<EventBody[]>(mine);
    expect((await eventsOf('a')).map((e) => e.id)).toContain(bEvent.id);

    await leave('b');

    const bSees = (await eventsOf('b')).map((e) => e.id);
    expect(bSees).toContain(bEvent.id);
    expect(bSees).not.toContain(eventId);
    expect((await eventsOf('a')).map((e) => e.id)).not.toContain(bEvent.id);

    const edit = await http()
      .put(`/api/schedule-events/${eventId}/completion`)
      .set(as('b'))
      .expect(404);
    expect(errorCode(edit)).toBe('RES_001');

    expect((await sharing('b')).linked).toBe(false);
    expect(memberIds(await sharing('a'))).toEqual([ids.a, ids.c]);
  });

  it('둘만 남은 묶음에서 한 명이 나가면 묶음이 지워진다', async () => {
    await leave('c');

    const a = await sharing('a');
    expect(a.linked).toBe(false);
    expect(memberIds(a)).toEqual([ids.a]);

    const rows = await app
      .get(DataSource)
      .query<
        { count: string }[]
      >('SELECT count(*) FROM calendar_group_members WHERE user_id = ANY($1)', [[ids.a, ids.c]]);
    expect(rows[0].count).toBe('0');

    // 연동 중이 아니어도 해제는 204
    await leave('c');
  });

  it('함께하던 사람이 탈퇴해 혼자 남으면 연동되지 않은 것으로 보고 정리한다', async () => {
    await join('e', codes.d).expect(201);
    await http().delete('/api/users/me').set(as('d')).expect(204);

    const e = await sharing('e');
    expect(e.linked).toBe(false);
    expect(memberIds(e)).toEqual([ids.e]);

    const rows = await app
      .get(DataSource)
      .query<
        { count: string }[]
      >('SELECT count(*) FROM calendar_group_members WHERE user_id = $1', [ids.e]);
    expect(rows[0].count).toBe('0');
  });

  it('없는 코드나 형식이 틀린 코드는 SCHED_001', async () => {
    const preview = await http()
      .get('/api/calendar-invitations/RUP-000000')
      .set(as('a'))
      .expect(404);
    expect(errorCode(preview)).toBe('SCHED_001');

    const bad = await join('a', '엉뚱한 코드').expect(404);
    expect(errorCode(bad)).toBe('SCHED_001');
  });
});