import express from 'express';
import type { AddressInfo } from 'node:net';
import { afterEach, describe, expect, it, vi } from 'vitest';
import { MediaResponseSchema } from '../../packages/api-contracts/src/media.js';
import type { WebContext } from '../../src/web/context.js';
import { createMediaRouter } from '../../src/web/routes/media.js';

const servers: Array<ReturnType<express.Express['listen']>> = [];

async function request(app: express.Express, path: string): Promise<Response> {
  const server = app.listen(0);
  servers.push(server);
  await new Promise<void>((resolve) => server.once('listening', resolve));
  const { port } = server.address() as AddressInfo;
  return fetch(`http://127.0.0.1:${port}${path}`);
}

afterEach(async () => {
  await Promise.all(servers.splice(0).map((server) => new Promise<void>((resolve) => server.close(() => resolve()))));
});

describe('media route username presentation', () => {
  it('lists received media while excluding items sent by the owning account', async () => {
    const mediaItem = (id: string, sender: string) => ({
      accountId: 't2_owner', id, chatUsername: 'alice', chatRoomId: 'room-one', sender,
      timestamp: 1, originalUrl: `mxc://${id}`, fileName: `${id}.jpg`, relativePath: `${id}.jpg`, createdAt: 2,
    });
    const context = {
      logger: { error: vi.fn() },
      services: {
        media: { getMediaItems: vi.fn().mockResolvedValue([
          mediaItem('received', 'alice'),
          mediaItem('sent-marker', 'Me'),
          mediaItem('sent-matrix-id', '@t2_owner:reddit.com'),
          mediaItem('sent-username', 'owner'),
        ]) },
        chat: {
          getCachedConversations: vi.fn().mockResolvedValue([]),
          resolveSenderDisplay: vi.fn((identity: string) => identity),
        },
        redditAccounts: {
          get: vi.fn().mockReturnValue({ accountId: 't2_owner', redditUsername: 'owner' }),
        },
      },
    } as unknown as WebContext;
    const app = express().use('/api', createMediaRouter(context));

    const response = await request(app, '/api/media');

    expect(response.status).toBe(200);
    expect(await response.json()).toEqual([
      expect.objectContaining({ id: 'received', sender: 'alice' }),
    ]);
  });

  it('upgrades historical t2 fields through the chat username map', async () => {
    const context = {
      logger: { error: vi.fn() },
      services: {
        media: { getMediaItems: vi.fn().mockResolvedValue([{
          id: 'one', chatUsername: 't2_known', chatRoomId: 'room-one', sender: 't2_known',
          timestamp: 1, originalUrl: 'mxc://one', fileName: 'one.jpg', relativePath: 'one.jpg', createdAt: 2,
        }]) },
        chat: {
          getCachedConversations: vi.fn().mockResolvedValue([]),
          resolveSenderDisplay: vi.fn((identity: string) => identity === 't2_known' ? 'alice' : identity),
        },
      },
    } as unknown as WebContext;
    const app = express().use('/api', createMediaRouter(context));

    const response = await request(app, '/api/media');

    expect(response.status).toBe(200);
    expect(await response.json()).toEqual([expect.objectContaining({ chatUsername: 'alice', sender: 'alice' })]);
  });

  it('uses a safe fallback when no username mapping exists', async () => {
    const context = {
      logger: { error: vi.fn() },
      services: {
        media: { getMediaItems: vi.fn().mockResolvedValue([{
          id: 'one', chatUsername: 't2_missing', chatRoomId: 'room-one', sender: '@t2_missing:reddit.com',
          timestamp: 1, originalUrl: 'mxc://one', fileName: 'one.jpg', relativePath: 'one.jpg', createdAt: 2,
        }]) },
        chat: {
          getCachedConversations: vi.fn().mockResolvedValue([]),
          resolveSenderDisplay: vi.fn((identity: string) => identity),
        },
      },
    } as unknown as WebContext;
    const app = express().use('/api', createMediaRouter(context));

    const response = await request(app, '/api/media');
    const body = await response.json();

    expect(JSON.stringify(body)).not.toContain('t2_missing');
    expect(body[0]).toMatchObject({ chatUsername: null, sender: 'Unknown Reddit user' });
  });

  it('keeps the internal account ID out of the public media item', async () => {
    const context = {
      logger: { error: vi.fn() },
      services: {
        media: { getMediaItems: vi.fn().mockResolvedValue([{
          accountId: 't2_owner', id: 'one', chatUsername: 'alice', chatRoomId: 'room-one', sender: 'alice',
          timestamp: 1, originalUrl: 'mxc://one', fileName: 'one.jpg', relativePath: 'one.jpg', createdAt: 2,
        }]) },
        chat: {
          getCachedConversations: vi.fn().mockResolvedValue([]),
          resolveSenderDisplay: vi.fn((identity: string) => identity),
        },
        redditAccounts: {
          get: vi.fn().mockReturnValue({ accountId: 't2_owner', redditUsername: 'owner' }),
        },
      },
    } as unknown as WebContext;
    const app = express().use('/api', createMediaRouter(context));

    const response = await request(app, '/api/media');
    const body: unknown = await response.json();

    expect(MediaResponseSchema.parse(body)).toEqual([
      expect.objectContaining({
        id: 'one',
        owner: { accountId: 't2_owner', redditUsername: 'owner' },
      }),
    ]);
    expect(body).not.toEqual([expect.objectContaining({ accountId: expect.anything() })]);
  });
});