/**
 * CRUD + capability behaviour for /api/webviews.
 *
 * Uses app.inject() (no port) against a temp CODEMAN_DATA_DIR, so nothing touches
 * the developer's real ~/.codeman/webviews.json.
 */

import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
import Fastify, { type FastifyInstance } from 'fastify';
import fastifyCookie from '@fastify/cookie';
import fastifyWebsocket from '@fastify/websocket';
import fs from 'node:fs/promises';
import os from 'node:os';
import path from 'node:path';
import { registerWebviewRoutes } from '../../src/web/routes/webview-routes.js';
import { installRouteErrorHandler } from '../../src/web/route-error-handler.js';
import { webviewCapabilities } from '../../src/webview-capabilities.js';
import { capabilityFromProxyPath } from '../../src/web/webview-proxy.js';
import { TabLayoutService } from '../../src/tab-layout-service.js';
import type { TabLayout } from '../../src/tab-layout.js';

let app: FastifyInstance;
let tmpDir: string;
let savedDataDir: string | undefined;
const broadcasts: Array<{ event: string; data: unknown }> = [];
const webviewCreated = vi.fn(async () => {});
const webviewDeleted = vi.fn(async () => {});

beforeEach(async () => {
  tmpDir = await fs.mkdtemp(path.join(os.tmpdir(), 'codeman-webviews-'));
  savedDataDir = process.env.CODEMAN_DATA_DIR;
  process.env.CODEMAN_DATA_DIR = tmpDir;
  broadcasts.length = 0;
  webviewCreated.mockClear();
  webviewDeleted.mockClear();

  app = Fastify({ logger: false });
  await app.register(fastifyCookie);
  // The proxy route declares a wsHandler, so the plugin must be present.
  await app.register(fastifyWebsocket);
  registerWebviewRoutes(app, {
    broadcast: (event: string, data: unknown) => broadcasts.push({ event, data }),
    tabLayouts: { webviewCreated, webviewDeleted },
  } as never);
  installRouteErrorHandler(app);
  await app.ready();
});

afterEach(async () => {
  await app.close();
  if (savedDataDir === undefined) delete process.env.CODEMAN_DATA_DIR;
  else process.env.CODEMAN_DATA_DIR = savedDataDir;
  await fs.rm(tmpDir, { recursive: true, force: true }).catch(() => {});
});

const create = (payload: Record<string, unknown>) => app.inject({ method: 'POST', url: '/api/webviews', payload });

describe('GET /api/webviews', () => {
  it('starts empty and reports the frame budget the client must honour', async () => {
    const res = await app.inject({ method: 'GET', url: '/api/webviews' });
    expect(res.statusCode).toBe(200);
    const body = res.json();
    expect(body.success).toBe(true);
    expect(body.data.webviews).toEqual([]);
    expect(typeof body.data.maxLiveFrames).toBe('number');
  });
});

describe('POST /api/webviews', () => {
  it('creates a dashboard that defaults to proxied and sandboxed', async () => {
    const res = await create({ name: 'Grafana', url: 'http://127.0.0.1:4000/' });
    expect(res.statusCode).toBe(200);
    const w = res.json().data;
    // Proxy + untrusted are the safe defaults and must not drift.
    expect(w.embedMode).toBe('proxy');
    expect(w.trusted).toBe(false);
    expect(w.id).toBeTruthy();
  });

  it('broadcasts the change so other devices re-fetch', async () => {
    await create({ name: 'G', url: 'http://127.0.0.1:4000/' });
    expect(broadcasts.map((b) => b.event)).toContain('webview:changed');
  });

  it('persists across a fresh read of the store', async () => {
    await create({ name: 'G', url: 'http://127.0.0.1:4000/' });
    const list = (await app.inject({ method: 'GET', url: '/api/webviews' })).json().data.webviews;
    expect(list).toHaveLength(1);
    expect(list[0].name).toBe('G');
  });

  it('rejects URLs that are not plain http(s)', async () => {
    for (const url of ['javascript:alert(1)', 'file:///etc/passwd', 'data:text/html,x']) {
      const res = await create({ name: 'bad', url });
      expect(res.statusCode, url).toBe(400);
      expect(res.json().errorCode).toBe('INVALID_INPUT');
    }
  });

  it('rolls back webview persistence and emits nothing when layout capacity rejects insertion', async () => {
    const refs = Array.from({ length: 512 }, (_, index) => ({ kind: 'session' as const, id: `s-${index}` }));
    const original: TabLayout = {
      version: 9,
      groups: [],
      ungrouped: refs,
      updatedAt: '2026-08-16T00:00:00.000Z',
    };
    let stored = original;
    const live = new Map(refs.map((ref, index) => [ref.id, { id: ref.id, createdAt: index }]));
    const atomicBroadcast = vi.fn();
    const service = new TabLayoutService({
      store: {
        getTabLayout: () => stored,
        setTabLayout: (_owner, layout) => {
          stored = layout;
        },
        getSessions: () => ({}),
        getSessionOrder: () => [],
      } as never,
      sessions: live,
      readWebviews: async () =>
        (await import('../../src/webview-store.js')).readWebviews(tmpDir) as Promise<
          Array<{ id: string; owner?: string }>
        >,
      broadcast: atomicBroadcast,
      broadcastSessionOrder: vi.fn(),
    });
    const atomicApp = Fastify({ logger: false });
    await atomicApp.register(fastifyCookie);
    await atomicApp.register(fastifyWebsocket);
    registerWebviewRoutes(atomicApp, {
      broadcast: atomicBroadcast,
      tabLayouts: service,
    } as never);
    installRouteErrorHandler(atomicApp);
    await atomicApp.ready();

    const response = await atomicApp.inject({
      method: 'POST',
      url: '/api/webviews',
      payload: { name: 'overflow', url: 'https://example.test/' },
    });
    const list = (await atomicApp.inject({ method: 'GET', url: '/api/webviews' })).json().data.webviews;

    expect(response.statusCode).toBe(500);
    expect(list).toEqual([]);
    expect(stored).toEqual(original);
    expect(atomicBroadcast).not.toHaveBeenCalled();
    await atomicApp.close();
  });

  it('rejects URLs carrying embedded credentials', async () => {
    const res = await create({ name: 'bad', url: 'http://user:pass@host:4000/' });
    expect(res.statusCode).toBe(400);
  });

  it('requires a name', async () => {
    expect((await create({ url: 'http://127.0.0.1:4000/' })).statusCode).toBe(400);
    expect((await create({ name: '   ', url: 'http://127.0.0.1:4000/' })).statusCode).toBe(400);
  });
});

describe('PATCH /api/webviews/:id', () => {
  it('updates fields and revokes the outstanding capability', async () => {
    const id = (await create({ name: 'G', url: 'http://127.0.0.1:4000/' })).json().data.id;
    const opened = await app.inject({ method: 'POST', url: `/api/webviews/${id}/open` });
    const cap = capabilityFromProxyPath(opened.json().data.embedUrl)!;
    expect(webviewCapabilities.resolve(cap)).toBeDefined();

    const res = await app.inject({
      method: 'PATCH',
      url: `/api/webviews/${id}`,
      payload: { url: 'http://127.0.0.1:4001/' },
    });
    expect(res.statusCode).toBe(200);
    expect(res.json().data.url).toBe('http://127.0.0.1:4001/');
    // A token minted against the OLD url must not survive the repoint.
    expect(webviewCapabilities.resolve(cap)).toBeUndefined();
  });

  it('404s an unknown id', async () => {
    const res = await app.inject({ method: 'PATCH', url: '/api/webviews/nope', payload: { name: 'x' } });
    expect(res.statusCode).toBe(404);
  });

  it('still validates the URL on update', async () => {
    const id = (await create({ name: 'G', url: 'http://127.0.0.1:4000/' })).json().data.id;
    const res = await app.inject({ method: 'PATCH', url: `/api/webviews/${id}`, payload: { url: 'file:///etc' } });
    expect(res.statusCode).toBe(400);
  });
});

describe('DELETE /api/webviews/:id', () => {
  it('removes it and revokes its capability', async () => {
    const id = (await create({ name: 'G', url: 'http://127.0.0.1:4000/' })).json().data.id;
    const opened = await app.inject({ method: 'POST', url: `/api/webviews/${id}/open` });
    const cap = capabilityFromProxyPath(opened.json().data.embedUrl)!;

    expect((await app.inject({ method: 'DELETE', url: `/api/webviews/${id}` })).statusCode).toBe(200);
    expect((await app.inject({ method: 'GET', url: '/api/webviews' })).json().data.webviews).toEqual([]);
    expect(webviewCapabilities.resolve(cap)).toBeUndefined();
  });

  it('keeps the exact saved record and emits nothing when layout deletion fails', async () => {
    const created = (await create({ name: 'Keep me', url: 'https://keep.example/' })).json().data;
    broadcasts.length = 0;
    webviewDeleted.mockRejectedValueOnce(new Error('tab layout restoration failed'));

    const response = await app.inject({ method: 'DELETE', url: `/api/webviews/${created.id}` });
    const list = (await app.inject({ method: 'GET', url: '/api/webviews' })).json().data.webviews;

    expect(response.statusCode).toBe(500);
    expect(list).toEqual([created]);
    expect(broadcasts).toEqual([]);
  });

  it('404s an unknown id', async () => {
    expect((await app.inject({ method: 'DELETE', url: '/api/webviews/nope' })).statusCode).toBe(404);
  });
});

describe('POST /api/webviews/:id/open', () => {
  it('mints a same-origin embed path for a proxied dashboard', async () => {
    const id = (await create({ name: 'G', url: 'http://127.0.0.1:4000/' })).json().data.id;
    const data = (await app.inject({ method: 'POST', url: `/api/webviews/${id}/open` })).json().data;
    expect(data.embedUrl).toMatch(/^\/webview\/[A-Za-z0-9_-]{16,}\/$/);
    expect(capabilityFromProxyPath(data.embedUrl)).toBeTruthy();
  });

  it('returns no embed path in direct mode, where the iframe uses the real URL', async () => {
    const id = (await create({ name: 'G', url: 'https://ok.example/', embedMode: 'direct' })).json().data.id;
    const data = (await app.inject({ method: 'POST', url: `/api/webviews/${id}/open` })).json().data;
    expect(data.embedUrl).toBeUndefined();
    expect(data.webview.url).toBe('https://ok.example/');
  });

  it('reuses the capability across repeated opens instead of leaking one per click', async () => {
    const id = (await create({ name: 'G', url: 'http://127.0.0.1:4000/' })).json().data.id;
    const first = (await app.inject({ method: 'POST', url: `/api/webviews/${id}/open` })).json().data.embedUrl;
    const second = (await app.inject({ method: 'POST', url: `/api/webviews/${id}/open` })).json().data.embedUrl;
    expect(second).toBe(first);
  });

  it('records lastOpenedAt', async () => {
    const id = (await create({ name: 'G', url: 'http://127.0.0.1:4000/' })).json().data.id;
    await app.inject({ method: 'POST', url: `/api/webviews/${id}/open` });
    const list = (await app.inject({ method: 'GET', url: '/api/webviews' })).json().data.webviews;
    expect(typeof list[0].lastOpenedAt).toBe('number');
  });

  it('404s an unknown id', async () => {
    expect((await app.inject({ method: 'POST', url: '/api/webviews/nope/open' })).statusCode).toBe(404);
  });
});

describe('proxy route', () => {
  it('refuses an unknown or expired capability', async () => {
    const res = await app.inject({ method: 'GET', url: `/webview/${'Z'.repeat(32)}/` });
    expect(res.statusCode).toBe(403);
  });

  it('redirects the prefix without a trailing slash, so relative URLs resolve inside it', async () => {
    const cap = 'Y'.repeat(32);
    const res = await app.inject({ method: 'GET', url: `/webview/${cap}` });
    expect(res.statusCode).toBe(302);
    expect(res.headers.location).toBe(`/webview/${cap}/`);
  });
});

describe('POST /api/webviews/probe', () => {
  it('reports an unreachable target as a normal answer, not a 500', async () => {
    // Port 1 is reserved and refuses instantly.
    const res = await app.inject({
      method: 'POST',
      url: '/api/webviews/probe',
      payload: { url: 'http://127.0.0.1:1/' },
    });
    expect(res.statusCode).toBe(200);
    const probe = res.json().data;
    expect(probe.reachable).toBe(false);
    expect(probe.recommendedMode).toBe('proxy');
  });

  it('rejects an invalid URL up front', async () => {
    const res = await app.inject({ method: 'POST', url: '/api/webviews/probe', payload: { url: 'file:///etc' } });
    expect(res.statusCode).toBe(400);
  });
});