// Security-guard tests for DocmostClient.uploadImage and DocmostClient.createPage.
//
// Both methods send multipart bodies via BARE default axios (`axios.post`)
// rather than the per-instance client, because a FormData stream is single-use
// and cannot be replayed by this.client's 401 response interceptor. They each
// implement their own one-shot 401/403 re-auth that rebuilds the FormData.
//
// We therefore mock BOTH adapters:
//   - the default `axios` (via `new MockAdapter(axios)`) for `/auth/login`,
//     `/files/upload` and `/pages/import` (the bare multipart POSTs), and
//   - the per-instance client (via `new MockAdapter((client as any).client)`)
//     for the JSON endpoints `/pages/info`, `/pages/sidebar-pages`,
//     `/pages/update`.
//
// For the filesystem we use REAL temp files written under os.tmpdir() so the
// real statSync/readFileSync path is exercised (and cleaned up afterEach).

import { describe, it, expect, beforeEach, afterEach } from 'vitest';
import MockAdapter from 'axios-mock-adapter';
import axios from 'axios';
import { writeFileSync, mkdtempSync, rmSync, mkdirSync } from 'node:fs';
import { join } from 'node:path';
import { tmpdir } from 'node:os';
import { DocmostClient } from '../packages/docmost-client/src/client.js';

const API_URL = 'http://docmost.test/api';
const SPACE_ID = 'space-1';
const PAGE_ID = 'page-1';

// A 1x1 transparent PNG (valid-ish bytes; content is irrelevant to the guards).
const PNG_BYTES = Buffer.from(
  '89504e470d0a1a0a0000000d49484452000000010000000108060000001f15c4890000000a49444154789c63000100000500010d0a2db40000000049454e44ae426082',
  'hex',
);

// A login mock that satisfies performLogin(): it reads the authToken cookie
// from the Set-Cookie header. Returns it as an array, as a real server would.
function mockLogin(mockAxios: MockAdapter): void {
  mockAxios.onPost(`${API_URL}/auth/login`).reply(200, {}, {
    'set-cookie': ['authToken=test-jwt-token; HttpOnly; Path=/'],
  });
}

describe('DocmostClient multipart security guards', () => {
  let tmpDir: string;
  let mockAxios: MockAdapter; // default axios -> bare multipart + login
  let mockClient: MockAdapter; // per-instance client -> JSON endpoints
  let client: DocmostClient;

  beforeEach(() => {
    tmpDir = mkdtempSync(join(tmpdir(), 'docmost-upload-test-'));
    client = new DocmostClient(API_URL, 'user@test', 'pw');
    mockAxios = new MockAdapter(axios);
    mockClient = new MockAdapter((client as any).client);
    mockLogin(mockAxios);
  });

  afterEach(() => {
    mockAxios.restore();
    mockClient.restore();
    delete process.env.DEBUG;
    rmSync(tmpDir, { recursive: true, force: true });
  });

  // Helper: write a real image fixture and return its absolute path.
  function writeImage(name: string, bytes: Buffer = PNG_BYTES): string {
    const p = join(tmpDir, name);
    writeFileSync(p, bytes);
    return p;
  }

  describe('uploadImage — host-fs trust boundary', () => {
    it('rejects an unsupported extension BEFORE any stat/read', async () => {
      // Point at a path that does NOT exist on disk. If the extension guard
      // runs first (as it must), we get the "unsupported image type" error and
      // never reach statSync — which would otherwise throw a "Cannot stat"
      // error. The error message proves the guard order.
      const badPath = join(tmpDir, 'does-not-exist.txt');
      await expect(client.uploadImage(PAGE_ID, badPath)).rejects.toThrow(
        /unsupported image type \.txt; supported: png, jpg, jpeg, gif, webp, svg/,
      );
    });

    it('reports "(none)" for a path with no extension (still before stat)', async () => {
      const noExt = join(tmpDir, 'noextension');
      await expect(client.uploadImage(PAGE_ID, noExt)).rejects.toThrow(
        /unsupported image type \(none\)/,
      );
    });

    it('rejects a directory (non-regular file) after the extension passes', async () => {
      // A directory whose name ends in .png passes the extension allowlist but
      // must fail the stat.isFile() guard.
      const dirPath = join(tmpDir, 'a-directory.png');
      mkdirSync(dirPath);
      await expect(client.uploadImage(PAGE_ID, dirPath)).rejects.toThrow(
        new RegExp(`Not a regular file: "${dirPath.replace(/[.*+?^${}()|[\]\\]/g, '\\$&')}"`),
      );
    });

    it('surfaces a stat failure for a missing supported-extension file', async () => {
      // Extension is valid, but the file does not exist -> statSync throws and
      // is wrapped in "Cannot stat image file ...".
      const missing = join(tmpDir, 'missing.png');
      await expect(client.uploadImage(PAGE_ID, missing)).rejects.toThrow(
        /Cannot stat image file at ".*missing\.png": /,
      );
    });

    it('rejects a file larger than the 20 MiB cap', async () => {
      // Write a real file just over 20 MiB so the real statSync size path is
      // exercised. 20 MiB == 20 * 1024 * 1024; one extra byte trips the cap.
      const MAX = 20 * 1024 * 1024;
      const bigPath = join(tmpDir, 'big.png');
      writeFileSync(bigPath, Buffer.alloc(MAX + 1));
      await expect(client.uploadImage(PAGE_ID, bigPath)).rejects.toThrow(
        new RegExp(`Image too large: ${MAX + 1} bytes exceeds the ${MAX}-byte cap`),
      );
      // No multipart POST should have been attempted for an oversized file.
      const uploadPosts = mockAxios.history.post.filter((r) =>
        String(r.url).includes('/files/upload'),
      );
      expect(uploadPosts.length).toBe(0);
    });

    it('uploads a valid image and returns attachment metadata + image node', async () => {
      const imgPath = writeImage('ok.png');
      mockAxios.onPost(`${API_URL}/files/upload`).reply(200, {
        data: { id: 'att-1', fileName: 'ok.png', fileSize: 1234 },
      });

      const res = await client.uploadImage(PAGE_ID, imgPath);
      expect(res.attachmentId).toBe('att-1');
      expect(res.fileName).toBe('ok.png');
      expect(res.fileSize).toBe(1234);
      expect(res.src).toBe('/api/files/att-1/ok.png');
      expect(res.imageNode.type).toBe('image');
      expect(res.imageNode.attrs.attachmentId).toBe('att-1');
      expect(res.imageNode.attrs.size).toBe(1234);
    });

    it('falls back to the local stat size when the response omits fileSize', async () => {
      const imgPath = writeImage('nosize.png'); // PNG_BYTES length
      const expectedSize = PNG_BYTES.length;
      mockAxios.onPost(`${API_URL}/files/upload`).reply(200, {
        // No fileSize in the attachment payload.
        data: { id: 'att-2', fileName: 'nosize.png' },
      });

      const res = await client.uploadImage(PAGE_ID, imgPath);
      expect(res.fileSize).toBe(expectedSize);
      // The image node's size attr also uses the resolved (local) size.
      expect(res.imageNode.attrs.size).toBe(expectedSize);
    });

    it('rebuilds a FRESH FormData and retries exactly once on a 401', async () => {
      const imgPath = writeImage('retry.png');
      // First multipart POST -> 401; second -> 200. login() is also issued
      // between the two by the re-auth branch (already mocked by mockLogin).
      mockAxios
        .onPost(`${API_URL}/files/upload`)
        .replyOnce(401)
        .onPost(`${API_URL}/files/upload`)
        .replyOnce(200, { data: { id: 'att-3', fileName: 'retry.png', fileSize: 7 } });

      const res = await client.uploadImage(PAGE_ID, imgPath);
      expect(res.attachmentId).toBe('att-3');

      // Exactly two upload POSTs (the original + one retry), and a fresh login
      // was triggered in between.
      const uploadPosts = mockAxios.history.post.filter((r) =>
        String(r.url).includes('/files/upload'),
      );
      expect(uploadPosts.length).toBe(2);
      const loginPosts = mockAxios.history.post.filter((r) =>
        String(r.url).includes('/auth/login'),
      );
      // One initial ensureAuthenticated() login + one re-auth login.
      expect(loginPosts.length).toBeGreaterThanOrEqual(1);
    });

    it('does NOT retry more than once on repeated 401s', async () => {
      const imgPath = writeImage('always401.png');
      // Every upload POST returns 401. After the single retry also 401s, the
      // error must propagate (no infinite loop). The second 401 is a raw
      // AxiosError thrown out of the retry branch (not re-caught).
      mockAxios.onPost(`${API_URL}/files/upload`).reply(401);

      await expect(client.uploadImage(PAGE_ID, imgPath)).rejects.toBeTruthy();
      const uploadPosts = mockAxios.history.post.filter((r) =>
        String(r.url).includes('/files/upload'),
      );
      // Exactly two attempts: original + one retry.
      expect(uploadPosts.length).toBe(2);
    });

    it('sanitizes a non-auth AxiosError and does NOT leak the response body', async () => {
      const imgPath = writeImage('leak.png');
      const SECRET = 'SUPER_SECRET_TOKEN_abc123';
      mockAxios.onPost(`${API_URL}/files/upload`).reply(500, {
        message: SECRET,
        internal: { stack: SECRET },
      });

      let caught: Error | undefined;
      try {
        await client.uploadImage(PAGE_ID, imgPath);
      } catch (e) {
        caught = e as Error;
      }
      expect(caught).toBeDefined();
      // Surfaces only status/statusText, never the body.
      expect(caught!.message).toMatch(/Image upload failed: 500/);
      expect(caught!.message).not.toContain(SECRET);
    });

    it('throws on a response missing att.id', async () => {
      const imgPath = writeImage('noid.png');
      mockAxios.onPost(`${API_URL}/files/upload`).reply(200, {
        data: { fileName: 'noid.png' }, // missing id
      });
      await expect(client.uploadImage(PAGE_ID, imgPath)).rejects.toThrow(
        /Unexpected \/files\/upload response:/,
      );
    });

    it('throws on a response missing att.fileName', async () => {
      const imgPath = writeImage('noname.png');
      mockAxios.onPost(`${API_URL}/files/upload`).reply(200, {
        data: { id: 'att-x' }, // missing fileName
      });
      await expect(client.uploadImage(PAGE_ID, imgPath)).rejects.toThrow(
        /Unexpected \/files\/upload response:/,
      );
    });
  });

  describe('createPage — multipart import guards', () => {
    it('rejects when the parent page is not found', async () => {
      // getPage(parentPageId) -> getPageRaw -> POST /pages/info. Make it 404 so
      // getPage throws and createPage maps it to the parent-not-found error.
      mockClient.onPost('/pages/info').reply(404, { message: 'nope' });

      await expect(
        client.createPage('Title', '# body', SPACE_ID, 'missing-parent'),
      ).rejects.toThrow('Parent page with ID missing-parent not found.');

      // No import POST should have happened — the parent check runs first.
      const importPosts = mockAxios.history.post.filter((r) =>
        String(r.url).includes('/pages/import'),
      );
      expect(importPosts.length).toBe(0);
    });

    it('creates a page (no parent) and re-sets the title after import', async () => {
      // Import succeeds via bare axios.
      mockAxios
        .onPost(`${API_URL}/pages/import`)
        .reply(200, { data: { id: 'new-page-1' } });
      // Title restore goes through the per-instance client.
      mockClient.onPost('/pages/update').reply(200, { data: { ok: true } });
      // Final getPage(newPageId): /pages/info + /pages/sidebar-pages.
      mockClient
        .onPost('/pages/info')
        .reply(200, {
          data: { id: 'new-page-1', spaceId: SPACE_ID, title: 'My Title', content: null },
        });
      mockClient
        .onPost('/pages/sidebar-pages')
        .reply(200, { data: { items: [], meta: { hasNextPage: false } } });

      const res = await client.createPage('My Title', '# body', SPACE_ID);
      expect((res as any).success).toBe(true);

      // The title was re-set via /pages/update with the exact (un-mangled) title.
      const updatePosts = mockClient.history.post.filter((r) =>
        String(r.url).includes('/pages/update'),
      );
      expect(updatePosts.length).toBe(1);
      const body = JSON.parse(String(updatePosts[0].data));
      expect(body).toMatchObject({ pageId: 'new-page-1', title: 'My Title' });
    });

    it('rebuilds FormData and retries the import exactly once on a 401', async () => {
      mockAxios
        .onPost(`${API_URL}/pages/import`)
        .replyOnce(401)
        .onPost(`${API_URL}/pages/import`)
        .replyOnce(200, { data: { id: 'new-page-2' } });
      mockClient.onPost('/pages/update').reply(200, { data: { ok: true } });
      mockClient
        .onPost('/pages/info')
        .reply(200, {
          data: { id: 'new-page-2', spaceId: SPACE_ID, title: 'T', content: null },
        });
      mockClient
        .onPost('/pages/sidebar-pages')
        .reply(200, { data: { items: [], meta: { hasNextPage: false } } });

      const res = await client.createPage('T', '# body', SPACE_ID);
      expect((res as any).success).toBe(true);

      const importPosts = mockAxios.history.post.filter((r) =>
        String(r.url).includes('/pages/import'),
      );
      expect(importPosts.length).toBe(2);
    });

    it('rethrows a non-auth import error without retrying', async () => {
      mockAxios.onPost(`${API_URL}/pages/import`).reply(500, { message: 'boom' });

      await expect(
        client.createPage('T', '# body', SPACE_ID),
      ).rejects.toBeTruthy();

      const importPosts = mockAxios.history.post.filter((r) =>
        String(r.url).includes('/pages/import'),
      );
      // Exactly one attempt: a non-401/403 error is rethrown, never retried.
      expect(importPosts.length).toBe(1);
    });
  });
});