import { describe, it, expect, vi, beforeEach } from 'vitest';
import { HttpException } from '@nestjs/common';
import type { Response } from 'express';

import { TripShareController, SharedController } from '../../../src/nest/share/share.controller';
import type { ShareService } from '../../../src/nest/share/share.service';
import type { User } from '../../../src/types';

const user = { id: 1, role: 'user', email: 'u@example.test' } as User;

function svc(o: Partial<ShareService> = {}): ShareService {
  return {
    verifyTripAccess: vi.fn().mockReturnValue({ user_id: 1 }),
    canManage: vi.fn().mockReturnValue(true),
    ...o,
  } as unknown as ShareService;
}

function res() {
  const r = { statusCode: 200, status: vi.fn((c: number) => { r.statusCode = c; return r; }) };
  return r as unknown as Response & { statusCode: number };
}

function thrown(fn: () => unknown): { status: number; body: unknown } {
  try { fn(); } catch (err) {
    expect(err).toBeInstanceOf(HttpException);
    const e = err as HttpException;
    return { status: e.getStatus(), body: e.getResponse() };
  }
  throw new Error('expected throw');
}

beforeEach(() => vi.clearAllMocks());

describe('TripShareController', () => {
  it('POST 404 without access, 403 without share_manage', () => {
    expect(thrown(() => new TripShareController(svc({ verifyTripAccess: vi.fn().mockReturnValue(undefined) })).create(user, '5', {}, res()))).toEqual({ status: 404, body: { error: 'Trip not found' } });
    expect(thrown(() => new TripShareController(svc({ canManage: vi.fn().mockReturnValue(false) })).create(user, '5', {}, res()))).toEqual({ status: 403, body: { error: 'No permission' } });
  });

  it('POST answers 201 on create, 200 on update', () => {
    const createdRes = res();
    const c1 = new TripShareController(svc({ createOrUpdate: vi.fn().mockReturnValue({ token: 't', created: true }) } as Partial<ShareService>));
    expect(c1.create(user, '5', { share_map: true }, createdRes)).toEqual({ token: 't' });
    expect(createdRes.statusCode).toBe(201);

    const updatedRes = res();
    const c2 = new TripShareController(svc({ createOrUpdate: vi.fn().mockReturnValue({ token: 't', created: false }) } as Partial<ShareService>));
    expect(c2.create(user, '5', {}, updatedRes)).toEqual({ token: 't' });
    expect(updatedRes.statusCode).toBe(200);
  });

  it('GET 404 without access, returns info or a null token', () => {
    expect(thrown(() => new TripShareController(svc({ verifyTripAccess: vi.fn().mockReturnValue(undefined) })).get(user, '5'))).toEqual({ status: 404, body: { error: 'Trip not found' } });
    expect(new TripShareController(svc({ get: vi.fn().mockReturnValue({ token: 't' }) } as Partial<ShareService>)).get(user, '5')).toEqual({ token: 't' });
    expect(new TripShareController(svc({ get: vi.fn().mockReturnValue(null) } as Partial<ShareService>)).get(user, '5')).toEqual({ token: null });
  });

  it('DELETE 403 without share_manage, else removes', () => {
    expect(thrown(() => new TripShareController(svc({ canManage: vi.fn().mockReturnValue(false) })).remove(user, '5'))).toEqual({ status: 403, body: { error: 'No permission' } });
    const remove = vi.fn();
    expect(new TripShareController(svc({ remove } as Partial<ShareService>)).remove(user, '5')).toEqual({ success: true });
    expect(remove).toHaveBeenCalledWith('5');
  });
});

describe('SharedController', () => {
  it('404 for an invalid token, else returns the snapshot', () => {
    expect(thrown(() => new SharedController(svc({ getSharedTripData: vi.fn().mockReturnValue(null) } as Partial<ShareService>)).read('bad'))).toEqual({ status: 404, body: { error: 'Invalid or expired link' } });
    expect(new SharedController(svc({ getSharedTripData: vi.fn().mockReturnValue({ trip: { id: 9 } }) } as Partial<ShareService>)).read('tok')).toEqual({ trip: { id: 9 } });
  });
});