import { afterEach, describe, expect, it, vi } from 'vitest';
import axios from 'axios';
import MockAdapter from 'axios-mock-adapter';
// The DocmostClient source actually lives at packages/docmost-client/src/client.ts
// (NOT under .../lib/). The package barrel re-exports it, and vitest resolves the
// ".js" specifier to the TS source, so the real interceptors run.
import { DocmostClient } from '../packages/docmost-client/src/client.js';

/**
 * Integration tests for DocmostClient's REST surface using axios-mock-adapter.
 *
 * Two distinct axios instances are in play and must each be mocked separately:
 *
 *   1. this.client (a dedicated axios.create() instance reachable via the
 *      PRIVATE field (client as any).client). Every JSON REST call AND the
 *      401/403 response interceptor live here. Attaching MockAdapter to THIS
 *      instance is what makes the real interceptor run on mocked responses.
 *
 *   2. The global default `axios` import. performLogin() and getCollabToken()
 *      (in lib/auth-utils.ts) use BARE axios.post(...), so /auth/login and
 *      /auth/collab-token are NOT seen by this.client's interceptor and must be
 *      mocked on the shared default axios instance instead (same trick the
 *      existing auth-utils.test.ts relies on).
 *
 * Helper newClient() returns both the client and freshly-installed mocks; tests
 * close over them. afterEach resets every mock and restores spies.
 */

const BASE_URL = 'https://docmost.example/api';

// Track every mock created so afterEach can reset/restore them all even if a
// test forgets — keeps handler registrations from leaking across tests.
let activeMocks: MockAdapter[] = [];

function instanceMock(client: DocmostClient): MockAdapter {
  const m = new MockAdapter((client as any).client);
  activeMocks.push(m);
  return m;
}

function globalAxiosMock(): MockAdapter {
  const m = new MockAdapter(axios);
  activeMocks.push(m);
  return m;
}

/**
 * Register a /auth/login handler on the global-axios mock that always succeeds
 * with a valid authToken set-cookie (this is how performLogin extracts a token).
 * Returns a getter for how many times login was hit so re-login counts can be
 * asserted.
 */
function stubLoginSuccess(gmock: MockAdapter): { get count(): number } {
  let n = 0;
  gmock.onPost(`${BASE_URL}/auth/login`).reply(() => {
    n++;
    return [200, {}, { 'set-cookie': ['authToken=token-' + n + '; Path=/; HttpOnly'] }];
  });
  return {
    get count() {
      return n;
    },
  };
}

afterEach(() => {
  for (const m of activeMocks) m.restore();
  activeMocks = [];
  vi.restoreAllMocks();
});

// ---------------------------------------------------------------------------
// paginateAll
// ---------------------------------------------------------------------------
describe('paginateAll', () => {
  it('stops after a SHORT page (fewer items than the requested limit)', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    const gmock = globalAxiosMock();
    stubLoginSuccess(gmock);
    const imock = instanceMock(client);

    let calls = 0;
    imock.onPost('/items').reply((config) => {
      calls++;
      // Page 1 returns 3 items for a limit of 5 -> short page -> stop.
      const body = JSON.parse(config.data);
      expect(body.page).toBe(1);
      return [200, { data: { items: [{ id: 'a' }, { id: 'b' }, { id: 'c' }] } }];
    });

    const out = await (client as any).paginateAll('/items', {}, 5);
    expect(out.map((i: any) => i.id)).toEqual(['a', 'b', 'c']);
    expect(calls).toBe(1); // never asked for page 2
  });

  it('stops on an EMPTY page', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);

    let calls = 0;
    imock.onPost('/items').reply(() => {
      calls++;
      return [200, { data: { items: [] } }];
    });

    const out = await (client as any).paginateAll('/items', {}, 5);
    expect(out).toEqual([]);
    expect(calls).toBe(1);
  });

  it('follows meta.hasNextPage across multiple FULL pages', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);

    // Two full pages (limit 2) where the first declares hasNextPage:true and the
    // second declares false; the second page is full but its flag stops the loop.
    imock
      .onPost('/items')
      .replyOnce(200, {
        data: { items: [{ id: '1' }, { id: '2' }], meta: { hasNextPage: true } },
      })
      .onPost('/items')
      .replyOnce(200, {
        data: { items: [{ id: '3' }, { id: '4' }], meta: { hasNextPage: false } },
      });

    const out = await (client as any).paginateAll('/items', {}, 2);
    expect(out.map((i: any) => i.id)).toEqual(['1', '2', '3', '4']);
  });

  it('truncates at the MAX_PAGES cap and emits a console.warn', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);
    const warn = vi.spyOn(console, 'warn').mockImplementation(() => undefined);

    // A server that ALWAYS returns a full page (limit 1 -> 1 item) and always
    // claims hasNextPage:true. The only stop condition is the 50-page ceiling.
    let calls = 0;
    imock.onPost('/items').reply(() => {
      calls++;
      return [200, { data: { items: [{ id: 'x' + calls }], meta: { hasNextPage: true } } }];
    });

    const out = await (client as any).paginateAll('/items', {}, 1);
    // MAX_PAGES is 50: exactly 50 fetches, 50 accumulated items.
    expect(calls).toBe(50);
    expect(out).toHaveLength(50);
    expect(warn).toHaveBeenCalledTimes(1);
    expect(String(warn.mock.calls[0][0])).toContain('50-page cap');
  });

  it('clamps the limit into the 1..100 range before sending it', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);

    const seenLimits: number[] = [];
    imock.onPost('/big').reply((config) => {
      seenLimits.push(JSON.parse(config.data).limit);
      return [200, { data: { items: [] } }];
    });
    imock.onPost('/small').reply((config) => {
      seenLimits.push(JSON.parse(config.data).limit);
      return [200, { data: { items: [] } }];
    });

    await (client as any).paginateAll('/big', {}, 9999); // clamps down to 100
    await (client as any).paginateAll('/small', {}, 0); // clamps up to 1
    expect(seenLimits).toEqual([100, 1]);
  });

  it('reads items from BOTH the data.data.items and the data.items envelope', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);

    // data.data.items envelope (wrapped).
    imock.onPost('/wrapped').reply(200, { data: { items: [{ id: 'w' }] } });
    // bare data.items envelope (unwrapped).
    imock.onPost('/flat').reply(200, { items: [{ id: 'f' }] });

    const wrapped = await (client as any).paginateAll('/wrapped', {}, 100);
    const flat = await (client as any).paginateAll('/flat', {}, 100);
    expect(wrapped.map((i: any) => i.id)).toEqual(['w']);
    expect(flat.map((i: any) => i.id)).toEqual(['f']);
  });

  it('drives a real public method (getSpaces -> /spaces) through paginateAll + filterSpace', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);

    imock.onPost('/spaces').reply(200, {
      data: {
        items: [
          { id: 's1', name: 'Space One', slug: 'one', extraneous: 'dropped' },
        ],
      },
    });

    const spaces = await client.getSpaces();
    expect(spaces).toHaveLength(1);
    expect(spaces[0]).toMatchObject({ id: 's1', name: 'Space One', slug: 'one' });
    // filterSpace must drop fields it does not whitelist.
    expect(spaces[0]).not.toHaveProperty('extraneous');
  });
});

// ---------------------------------------------------------------------------
// search
// ---------------------------------------------------------------------------
describe('search', () => {
  it('clamps a too-large limit down to 100', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);

    let sentLimit: number | undefined;
    imock.onPost('/search').reply((config) => {
      sentLimit = JSON.parse(config.data).limit;
      return [200, { data: [], success: true }];
    });

    await client.search('q', undefined, 9999);
    expect(sentLimit).toBe(100);
  });

  it('clamps a too-small limit up to 1', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);

    let sentLimit: number | undefined;
    imock.onPost('/search').reply((config) => {
      sentLimit = JSON.parse(config.data).limit;
      return [200, { data: [], success: true }];
    });

    await client.search('q', undefined, 0);
    expect(sentLimit).toBe(1);
  });

  it('omits the limit field entirely when no limit is supplied', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);

    let body: any;
    imock.onPost('/search').reply((config) => {
      body = JSON.parse(config.data);
      return [200, { data: [], success: true }];
    });

    await client.search('hello', 'space-1');
    expect(body).not.toHaveProperty('limit');
    expect(body.query).toBe('hello');
    expect(body.spaceId).toBe('space-1');
  });

  it('normalizes a BARE-ARRAY data envelope', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);

    imock.onPost('/search').reply(200, {
      data: [{ id: 'p1', title: 'Result 1', extra: 'x' }],
      success: true,
    });

    const res = await client.search('q');
    expect(res.success).toBe(true);
    expect(res.items).toHaveLength(1);
    expect(res.items[0]).toMatchObject({ id: 'p1', title: 'Result 1' });
    // filterSearchResult whitelists fields; "extra" must be gone.
    expect(res.items[0]).not.toHaveProperty('extra');
  });

  it('normalizes a { items: [...] } data envelope', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);

    imock.onPost('/search').reply(200, {
      data: { items: [{ id: 'p2', title: 'Result 2' }] },
      success: true,
    });

    const res = await client.search('q');
    expect(res.items).toHaveLength(1);
    expect(res.items[0]).toMatchObject({ id: 'p2', title: 'Result 2' });
  });

  it('defaults success to false when the envelope omits it', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);

    imock.onPost('/search').reply(200, { data: { items: [] } });

    const res = await client.search('q');
    expect(res.success).toBe(false);
    expect(res.items).toEqual([]);
  });
});

// ---------------------------------------------------------------------------
// listComments (cursor loop)
// ---------------------------------------------------------------------------
describe('listComments', () => {
  it('loops on meta.nextCursor until it is null and concatenates every page', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);

    const seenCursors: (string | undefined)[] = [];
    imock.onPost('/comments').reply((config) => {
      const body = JSON.parse(config.data);
      seenCursors.push(body.cursor);
      if (!body.cursor) {
        // First page: a nextCursor pushes the loop to a second request.
        return [200, { data: { items: [{ id: 'c1' }], meta: { nextCursor: 'CUR2' } } }];
      }
      // Second page: nextCursor null -> loop terminates.
      return [200, { data: { items: [{ id: 'c2' }], meta: { nextCursor: null } } }];
    });

    const comments = await client.listComments('page-1');
    expect(comments.map((c: any) => c.id)).toEqual(['c1', 'c2']);
    // First call carries no cursor; the second carries the server's nextCursor.
    expect(seenCursors).toEqual([undefined, 'CUR2']);
  });

  it('parses stringified-JSON comment content into markdown per item', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);

    // createComment stores content as JSON.stringify(proseMirrorDoc); on read it
    // comes back as a STRING that parseCommentContent must JSON.parse before the
    // markdown converter can render it.
    const stringifiedDoc = JSON.stringify({
      type: 'doc',
      content: [{ type: 'paragraph', content: [{ type: 'text', text: 'Hello comment' }] }],
    });

    imock.onPost('/comments').reply(200, {
      data: {
        items: [
          { id: 'c1', pageId: 'page-1', content: stringifiedDoc },
          { id: 'c2', pageId: 'page-1', content: '' }, // empty -> "" markdown
        ],
        meta: { nextCursor: null },
      },
    });

    const comments = await client.listComments('page-1');
    expect(comments[0].content).toContain('Hello comment');
    expect(comments[1].content).toBe('');
  });

  it('handles the bare (unwrapped) response envelope too', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);

    // response.data.data is absent -> the code falls back to response.data.
    imock.onPost('/comments').reply(200, {
      items: [{ id: 'only', pageId: 'page-1', content: '' }],
      meta: { nextCursor: null },
    });

    const comments = await client.listComments('page-1');
    expect(comments.map((c: any) => c.id)).toEqual(['only']);
  });
});

// ---------------------------------------------------------------------------
// checkNewComments
// ---------------------------------------------------------------------------
describe('checkNewComments', () => {
  it('THROWS on an invalid "since" date rather than silently reporting nothing new', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    instanceMock(client);

    await expect(client.checkNewComments('space-1', 'not-a-date')).rejects.toThrow(
      /invalid "since" date/,
    );
  });

  it('keeps only comments with createdAt STRICTLY greater than since (boundary excluded)', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);

    const since = '2026-06-16T10:00:00.000Z';

    // One root page (no children) returned by sidebar-pages enumeration.
    imock.onPost('/pages/sidebar-pages').reply(200, {
      data: { items: [{ id: 'p1', title: 'Page 1', hasChildren: false }] },
    });

    // Comments on p1: one before, one exactly AT the boundary, one after.
    imock.onPost('/comments').reply(200, {
      data: {
        items: [
          { id: 'before', pageId: 'p1', content: '', createdAt: '2026-06-16T09:59:59.000Z' },
          { id: 'equal', pageId: 'p1', content: '', createdAt: since }, // boundary -> excluded (> is strict)
          { id: 'after', pageId: 'p1', content: '', createdAt: '2026-06-16T10:00:01.000Z' },
        ],
        meta: { nextCursor: null },
      },
    });

    const res = await client.checkNewComments('space-1', since);
    expect(res.totalNewComments).toBe(1);
    expect(res.pagesWithNewComments).toBe(1);
    expect(res.comments[0].comments.map((c: any) => c.id)).toEqual(['after']);
    // The boundary-equal comment is NOT included.
    expect(res.comments[0].comments.map((c: any) => c.id)).not.toContain('equal');
  });

  it('reports truncated=false for a small page set', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);

    imock.onPost('/pages/sidebar-pages').reply(200, {
      data: { items: [{ id: 'p1', title: 'Page 1', hasChildren: false }] },
    });
    imock.onPost('/comments').reply(200, {
      data: { items: [], meta: { nextCursor: null } },
    });

    const res = await client.checkNewComments('space-1', '2026-06-16T10:00:00.000Z');
    expect(res.truncated).toBe(false);
    expect(res.checkedPages).toBe(1);
    expect(res.totalNewComments).toBe(0);
  });
});

// ---------------------------------------------------------------------------
// AUTH: 401 interceptor + re-login dedup + getCollabTokenWithReauth
// ---------------------------------------------------------------------------
describe('auth: 401 interceptor and re-login', () => {
  it('re-authenticates ONCE and replays the request ONCE on a 401-then-200 sequence', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    // Silence performLogin's own console.error noise (not under test here).
    vi.spyOn(console, 'error').mockImplementation(() => undefined);
    const gmock = globalAxiosMock();
    const login = stubLoginSuccess(gmock);
    const imock = instanceMock(client);

    // Pre-authenticate so the very first ensureAuthenticated() login is already
    // done; this isolates the count of EXTRA re-logins caused by the 401.
    await client.login();
    expect(login.count).toBe(1);

    let getCalls = 0;
    imock.onPost('/workspace/info').reply(() => {
      getCalls++;
      if (getCalls === 1) return [401, {}]; // expired token
      return [200, { data: { id: 'ws-9', name: 'WS' }, success: true }];
    });

    const res = await client.getWorkspace();
    expect(res.data.id).toBe('ws-9');
    expect(getCalls).toBe(2); // original + exactly one replay
    expect(login.count).toBe(2); // pre-auth + exactly one re-login
  });

  it('does NOT loop forever: a 401 on BOTH original and replay surfaces the error (config._retry guard)', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    vi.spyOn(console, 'error').mockImplementation(() => undefined);
    const login = stubLoginSuccess(globalAxiosMock());
    const imock = instanceMock(client);

    await client.login();

    let getCalls = 0;
    imock.onPost('/workspace/info').reply(() => {
      getCalls++;
      return [401, {}]; // always 401, even after re-login
    });

    await expect(client.getWorkspace()).rejects.toBeDefined();
    // The replay sets config._retry, so the SECOND 401 is not retried again.
    expect(getCalls).toBe(2);
    // Only one re-login happened (the first 401); the replay's 401 did not
    // trigger another because _retry was already set.
    expect(login.count).toBe(2);
  });

  it('never retries the /auth/login request itself through the interceptor', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    const imock = instanceMock(client);

    // Route a /auth/login call THROUGH this.client (so the interceptor sees it)
    // and have it 401: the isLoginRequest guard must prevent any replay loop.
    let hits = 0;
    imock.onPost('/auth/login').reply(() => {
      hits++;
      return [401, {}];
    });

    await expect((client as any).client.post('/auth/login', {})).rejects.toBeDefined();
    expect(hits).toBe(1); // exactly one hit, no interceptor-driven retry
  });

  it('surfaces the ORIGINAL error when the re-login attempt itself fails', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    vi.spyOn(console, 'error').mockImplementation(() => undefined);
    const gmock = globalAxiosMock();
    // First login (pre-auth) succeeds; afterwards we flip login to fail.
    let loginCalls = 0;
    gmock.onPost(`${BASE_URL}/auth/login`).reply(() => {
      loginCalls++;
      if (loginCalls === 1) {
        return [200, {}, { 'set-cookie': ['authToken=tok; Path=/'] }];
      }
      return [500, { msg: 'login down' }]; // re-login fails
    });
    const imock = instanceMock(client);

    await client.login(); // pre-auth ok

    imock.onPost('/workspace/info').reply(403, { msg: 'original-forbidden' });

    let captured: any;
    try {
      await client.getWorkspace();
    } catch (e) {
      captured = e;
    }
    // The interceptor's catch returns Promise.reject(error) — the ORIGINAL 403,
    // not the re-login's 500.
    expect(captured?.response?.status).toBe(403);
    expect(captured?.response?.data).toMatchObject({ msg: 'original-forbidden' });
  });

  it('dedups concurrent login() callers into ONE in-flight /auth/login request', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    const login = stubLoginSuccess(globalAxiosMock());

    // Three simultaneous login() calls must collapse into a single request.
    await Promise.all([client.login(), client.login(), client.login()]);
    expect(login.count).toBe(1);
    // loginPromise resets to null after the in-flight login settles.
    expect((client as any).loginPromise).toBeNull();
  });

  it('resets loginPromise after a FAILED login so a later login can retry', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    vi.spyOn(console, 'error').mockImplementation(() => undefined);
    const gmock = globalAxiosMock();

    let loginCalls = 0;
    gmock.onPost(`${BASE_URL}/auth/login`).reply(() => {
      loginCalls++;
      if (loginCalls === 1) return [500, {}]; // first attempt fails
      return [200, {}, { 'set-cookie': ['authToken=ok; Path=/'] }]; // second succeeds
    });

    await expect(client.login()).rejects.toBeDefined();
    // .finally() cleared the memoized promise even on failure.
    expect((client as any).loginPromise).toBeNull();

    // A fresh login() therefore issues a brand-new request instead of returning
    // the previously-rejected promise.
    await client.login();
    expect(loginCalls).toBe(2);
    expect((client as any).loginPromise).toBeNull();
  });
});

describe('auth: getCollabTokenWithReauth', () => {
  it('re-authenticates once on a 401 from collab-token, then retries and returns the token', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    vi.spyOn(console, 'error').mockImplementation(() => undefined);
    const gmock = globalAxiosMock();
    const login = stubLoginSuccess(gmock);
    instanceMock(client);

    let collabCalls = 0;
    gmock.onPost(`${BASE_URL}/auth/collab-token`).reply(() => {
      collabCalls++;
      if (collabCalls === 1) return [401, {}]; // expired token
      return [200, { data: { token: 'collab-good' } }];
    });

    const token = await (client as any).getCollabTokenWithReauth();
    expect(token).toBe('collab-good');
    expect(collabCalls).toBe(2); // original + retry
    // ensureAuthenticated login (1) + re-login after the 401 (2).
    expect(login.count).toBe(2);
  });

  it('rethrows a NON-auth collab-token error without retrying', async () => {
    const client = new DocmostClient(BASE_URL, 'a@b.c', 'pw');
    vi.spyOn(console, 'error').mockImplementation(() => undefined);
    const gmock = globalAxiosMock();
    const login = stubLoginSuccess(gmock);
    instanceMock(client);

    let collabCalls = 0;
    gmock.onPost(`${BASE_URL}/auth/collab-token`).reply(() => {
      collabCalls++;
      return [500, { msg: 'server down' }]; // non-auth error
    });

    await expect((client as any).getCollabTokenWithReauth()).rejects.toBeDefined();
    expect(collabCalls).toBe(1); // no retry on a non-auth error
    expect(login.count).toBe(1); // only the initial ensureAuthenticated login
  });
});