jest.mock('uuid', () => ({ v4: jest.fn(() => 'mock-uuid') }));

jest.mock('@librechat/data-schemas', () => ({
  logger: { warn: jest.fn(), debug: jest.fn(), error: jest.fn() },
}));

jest.mock('@librechat/agents', () => ({}));

jest.mock('@librechat/api', () => ({
  sanitizeFilename: jest.fn((n) => n),
  parseText: jest.fn().mockResolvedValue({ text: '', bytes: 0 }),
  processAudioFile: jest.fn(),
  getStorageMetadata: jest.fn(() => ({})),
}));

jest.mock('librechat-data-provider', () => ({
  ...jest.requireActual('librechat-data-provider'),
  mergeFileConfig: jest.fn(),
}));

jest.mock('~/server/services/Files/images', () => ({
  convertImage: jest.fn(),
  resizeAndConvert: jest.fn(),
  resizeImageBuffer: jest.fn(),
}));

jest.mock('~/server/controllers/assistants/v2', () => ({
  addResourceFileId: jest.fn(),
  deleteResourceFileId: jest.fn(),
}));

jest.mock('~/server/controllers/assistants/helpers', () => ({
  getOpenAIClient: jest.fn(),
}));

jest.mock('~/server/services/Tools/credentials', () => ({
  loadAuthValues: jest.fn(),
}));

jest.mock('~/models', () => ({
  createFile: jest.fn().mockResolvedValue({ file_id: 'created-file-id' }),
  updateFileUsage: jest.fn(),
  deleteFiles: jest.fn(),
  addAgentResourceFile: jest.fn().mockResolvedValue({}),
  removeAgentResourceFiles: jest.fn(),
}));

jest.mock('~/server/utils/getFileStrategy', () => ({
  getFileStrategy: jest.fn().mockReturnValue('local'),
}));

jest.mock('~/server/services/Config', () => ({
  checkCapability: jest.fn().mockResolvedValue(true),
}));

jest.mock('~/server/utils/queue', () => ({
  LB_QueueAsyncCall: jest.fn(),
}));

jest.mock('~/server/services/Files/strategies', () => ({
  getStrategyFunctions: jest.fn(),
}));

jest.mock('~/server/utils', () => ({
  determineFileType: jest.fn(),
}));

jest.mock('~/server/services/Files/Audio/STTService', () => ({
  STTService: { getInstance: jest.fn() },
}));

const {
  EToolResources,
  FileSources,
  FileContext,
  AgentCapabilities,
} = require('librechat-data-provider');
const { mergeFileConfig } = require('librechat-data-provider');
const { checkCapability } = require('~/server/services/Config');
const { getStrategyFunctions } = require('~/server/services/Files/strategies');
const db = require('~/models');
const { processAgentFileUpload, processFileURL } = require('./process');

const PDF_MIME = 'application/pdf';
const DOCX_MIME = 'application/vnd.openxmlformats-officedocument.wordprocessingml.document';
const XLSX_MIME = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet';
const XLS_MIME = 'application/vnd.ms-excel';
const ODS_MIME = 'application/vnd.oasis.opendocument.spreadsheet';
const ODT_MIME = 'application/vnd.oasis.opendocument.text';
const ODP_MIME = 'application/vnd.oasis.opendocument.presentation';
const ODG_MIME = 'application/vnd.oasis.opendocument.graphics';

const makeReq = ({ mimetype = PDF_MIME, ocrConfig = null } = {}) => ({
  user: { id: 'user-123', tenantId: 'tenant-a' },
  file: {
    path: '/tmp/upload.bin',
    originalname: 'upload.bin',
    filename: 'upload-uuid.bin',
    mimetype,
  },
  body: { model: 'gpt-4o' },
  config: {
    fileConfig: {},
    fileStrategy: 'local',
    ocr: ocrConfig,
  },
});

const makeMetadata = () => ({
  agent_id: 'agent-abc',
  tool_resource: EToolResources.context,
  file_id: 'file-uuid-123',
});

const mockRes = {
  status: jest.fn().mockReturnThis(),
  json: jest.fn().mockReturnValue({}),
};

const makeFileConfig = ({ ocrSupportedMimeTypes = [] } = {}) => ({
  checkType: (mime, types) => (types ?? []).includes(mime),
  ocr: { supportedMimeTypes: ocrSupportedMimeTypes },
  stt: { supportedMimeTypes: [] },
  text: { supportedMimeTypes: [] },
});

describe('processAgentFileUpload', () => {
  beforeEach(() => {
    jest.clearAllMocks();
    mockRes.status.mockReturnThis();
    mockRes.json.mockReturnValue({});
    checkCapability.mockResolvedValue(true);
    getStrategyFunctions.mockReturnValue({
      handleFileUpload: jest
        .fn()
        .mockResolvedValue({ text: 'extracted text', bytes: 42, filepath: 'doc://result' }),
    });
    mergeFileConfig.mockReturnValue(makeFileConfig());
  });

  describe('OCR strategy selection', () => {
    test.each([
      ['PDF', PDF_MIME],
      ['DOCX', DOCX_MIME],
      ['XLSX', XLSX_MIME],
      ['XLS', XLS_MIME],
      ['ODS', ODS_MIME],
      ['Excel variant (msexcel)', 'application/msexcel'],
      ['Excel variant (x-msexcel)', 'application/x-msexcel'],
    ])('uses document_parser automatically for %s when no OCR is configured', async (_, mime) => {
      mergeFileConfig.mockReturnValue(makeFileConfig());
      const req = makeReq({ mimetype: mime, ocrConfig: null });

      await processAgentFileUpload({ req, res: mockRes, metadata: makeMetadata() });

      expect(getStrategyFunctions).toHaveBeenCalledWith(FileSources.document_parser);
    });

    test('does not check OCR capability when using automatic document_parser fallback', async () => {
      const req = makeReq({ mimetype: PDF_MIME, ocrConfig: null });

      await processAgentFileUpload({ req, res: mockRes, metadata: makeMetadata() });

      expect(checkCapability).not.toHaveBeenCalledWith(expect.anything(), AgentCapabilities.ocr);
      expect(getStrategyFunctions).toHaveBeenCalledWith(FileSources.document_parser);
    });

    test('uses the configured OCR strategy when OCR is set up for the file type', async () => {
      mergeFileConfig.mockReturnValue(makeFileConfig({ ocrSupportedMimeTypes: [PDF_MIME] }));
      const req = makeReq({
        mimetype: PDF_MIME,
        ocrConfig: { strategy: FileSources.mistral_ocr },
      });

      await processAgentFileUpload({ req, res: mockRes, metadata: makeMetadata() });

      expect(checkCapability).toHaveBeenCalledWith(expect.anything(), AgentCapabilities.ocr);
      expect(getStrategyFunctions).toHaveBeenCalledWith(FileSources.mistral_ocr);
    });

    test('uses document_parser as default when OCR is configured but no strategy is specified', async () => {
      mergeFileConfig.mockReturnValue(makeFileConfig({ ocrSupportedMimeTypes: [PDF_MIME] }));
      const req = makeReq({
        mimetype: PDF_MIME,
        ocrConfig: { supportedMimeTypes: [PDF_MIME] },
      });

      await processAgentFileUpload({ req, res: mockRes, metadata: makeMetadata() });

      expect(checkCapability).toHaveBeenCalledWith(expect.anything(), AgentCapabilities.ocr);
      expect(getStrategyFunctions).toHaveBeenCalledWith(FileSources.document_parser);
    });

    test('throws when configured OCR capability is not enabled for the agent', async () => {
      mergeFileConfig.mockReturnValue(makeFileConfig({ ocrSupportedMimeTypes: [PDF_MIME] }));
      checkCapability.mockResolvedValue(false);
      const req = makeReq({
        mimetype: PDF_MIME,
        ocrConfig: { strategy: FileSources.mistral_ocr },
      });

      await expect(
        processAgentFileUpload({ req, res: mockRes, metadata: makeMetadata() }),
      ).rejects.toThrow('OCR capability is not enabled for Agents');
    });

    test('uses document_parser (no capability check) when OCR capability returns false but no OCR config', async () => {
      checkCapability.mockResolvedValue(false);
      const req = makeReq({ mimetype: PDF_MIME, ocrConfig: null });

      await processAgentFileUpload({ req, res: mockRes, metadata: makeMetadata() });

      expect(checkCapability).not.toHaveBeenCalledWith(expect.anything(), AgentCapabilities.ocr);
      expect(getStrategyFunctions).toHaveBeenCalledWith(FileSources.document_parser);
    });

    test('uses document_parser when OCR is configured but the file type is not in OCR supported types', async () => {
      mergeFileConfig.mockReturnValue(makeFileConfig({ ocrSupportedMimeTypes: [PDF_MIME] }));
      const req = makeReq({
        mimetype: DOCX_MIME,
        ocrConfig: { strategy: FileSources.mistral_ocr },
      });

      await processAgentFileUpload({ req, res: mockRes, metadata: makeMetadata() });

      expect(checkCapability).not.toHaveBeenCalledWith(expect.anything(), AgentCapabilities.ocr);
      expect(getStrategyFunctions).toHaveBeenCalledWith(FileSources.document_parser);
      expect(getStrategyFunctions).not.toHaveBeenCalledWith(FileSources.mistral_ocr);
    });

    test('does not invoke any OCR strategy for unsupported MIME types without OCR config', async () => {
      const req = makeReq({ mimetype: 'text/plain', ocrConfig: null });

      await expect(
        processAgentFileUpload({ req, res: mockRes, metadata: makeMetadata() }),
      ).rejects.toThrow('File type text/plain is not supported for text parsing.');

      expect(getStrategyFunctions).not.toHaveBeenCalled();
    });

    test.each([
      ['ODT', ODT_MIME],
      ['ODP', ODP_MIME],
      ['ODG', ODG_MIME],
    ])('routes %s through configured OCR when OCR supports the type', async (_, mime) => {
      mergeFileConfig.mockReturnValue(makeFileConfig({ ocrSupportedMimeTypes: [mime] }));
      const req = makeReq({
        mimetype: mime,
        ocrConfig: { strategy: FileSources.mistral_ocr },
      });

      await processAgentFileUpload({ req, res: mockRes, metadata: makeMetadata() });

      expect(checkCapability).toHaveBeenCalledWith(expect.anything(), AgentCapabilities.ocr);
      expect(getStrategyFunctions).toHaveBeenCalledWith(FileSources.mistral_ocr);
    });

    test('throws instead of falling back to parseText when document_parser fails for a document MIME type', async () => {
      getStrategyFunctions.mockReturnValue({
        handleFileUpload: jest.fn().mockRejectedValue(new Error('No text found in document')),
      });
      const req = makeReq({ mimetype: PDF_MIME, ocrConfig: null });
      const { parseText } = require('@librechat/api');

      await expect(
        processAgentFileUpload({ req, res: mockRes, metadata: makeMetadata() }),
      ).rejects.toThrow(/image-based and requires an OCR service/);

      expect(parseText).not.toHaveBeenCalled();
    });

    test('falls back to document_parser when configured OCR fails for a document MIME type', async () => {
      mergeFileConfig.mockReturnValue(makeFileConfig({ ocrSupportedMimeTypes: [PDF_MIME] }));
      const failingUpload = jest.fn().mockRejectedValue(new Error('OCR API returned 500'));
      const fallbackUpload = jest
        .fn()
        .mockResolvedValue({ text: 'parsed text', bytes: 11, filepath: 'doc://result' });
      getStrategyFunctions
        .mockReturnValueOnce({ handleFileUpload: failingUpload })
        .mockReturnValueOnce({ handleFileUpload: fallbackUpload });
      const req = makeReq({
        mimetype: PDF_MIME,
        ocrConfig: { strategy: FileSources.mistral_ocr },
      });

      await expect(
        processAgentFileUpload({ req, res: mockRes, metadata: makeMetadata() }),
      ).resolves.not.toThrow();

      expect(getStrategyFunctions).toHaveBeenCalledWith(FileSources.mistral_ocr);
      expect(getStrategyFunctions).toHaveBeenCalledWith(FileSources.document_parser);
    });

    test('throws when both configured OCR and document_parser fallback fail', async () => {
      mergeFileConfig.mockReturnValue(makeFileConfig({ ocrSupportedMimeTypes: [PDF_MIME] }));
      getStrategyFunctions.mockReturnValue({
        handleFileUpload: jest.fn().mockRejectedValue(new Error('failure')),
      });
      const req = makeReq({
        mimetype: PDF_MIME,
        ocrConfig: { strategy: FileSources.mistral_ocr },
      });
      const { parseText } = require('@librechat/api');

      await expect(
        processAgentFileUpload({ req, res: mockRes, metadata: makeMetadata() }),
      ).rejects.toThrow(/image-based and requires an OCR service/);

      expect(parseText).not.toHaveBeenCalled();
    });
  });

  describe('text size guard', () => {
    test('throws before writing to MongoDB when extracted text exceeds 15MB', async () => {
      const oversizedText = 'x'.repeat(15 * 1024 * 1024 + 1);
      getStrategyFunctions.mockReturnValue({
        handleFileUpload: jest.fn().mockResolvedValue({
          text: oversizedText,
          bytes: Buffer.byteLength(oversizedText, 'utf8'),
          filepath: 'doc://result',
        }),
      });
      const req = makeReq({ mimetype: PDF_MIME, ocrConfig: null });
      const { createFile } = require('~/models');

      await expect(
        processAgentFileUpload({ req, res: mockRes, metadata: makeMetadata() }),
      ).rejects.toThrow(/exceeds the 15MB storage limit/);

      expect(createFile).not.toHaveBeenCalled();
    });

    test('succeeds when extracted text is within the 15MB limit', async () => {
      const okText = 'x'.repeat(1024);
      getStrategyFunctions.mockReturnValue({
        handleFileUpload: jest.fn().mockResolvedValue({
          text: okText,
          bytes: Buffer.byteLength(okText, 'utf8'),
          filepath: 'doc://result',
        }),
      });
      const req = makeReq({ mimetype: PDF_MIME, ocrConfig: null });

      await expect(
        processAgentFileUpload({ req, res: mockRes, metadata: makeMetadata() }),
      ).resolves.not.toThrow();
    });
  });

  /* Phase C / option α regression: the upload must persist its sandbox
   * pointer under `metadata.codeEnvRef` (the post-cutover schema). The
   * legacy `metadata.fileIdentifier` key is silently stripped by mongoose
   * strict mode and downstream readers (`primeFiles`, `getCodeFilesByIds`,
   * `categorizeFileForToolResources`, controller filtering) only check
   * `codeEnvRef`. Storing under the legacy key would orphan the file —
   * priming would skip it on subsequent code-execution turns and the
   * sandbox copy would never re-mount. */
  describe('execute_code uploads persist codeEnvRef metadata', () => {
    const fs = require('fs');
    const { Readable } = require('stream');
    let createReadStreamSpy;

    beforeEach(() => {
      /* `processAgentFileUpload` opens the multer-staged temp file via
       * `fs.createReadStream`. The test fixture path doesn't exist, so
       * stub it to a tiny in-memory stream. */
      createReadStreamSpy = jest
        .spyOn(fs, 'createReadStream')
        .mockImplementation(() => Readable.from(Buffer.from('')));
    });

    afterEach(() => {
      createReadStreamSpy.mockRestore();
    });

    const setupCodeEnvUpload = (uploaded) => {
      /* `processAgentFileUpload` calls `getStrategyFunctions` twice:
       * once with `execute_code` for the codeapi upload, then again with
       * the on-disk strategy (`local`) for the standard storage step that
       * runs in the same flow. Both must return a working
       * `handleFileUpload`. */
      const codeEnvUpload = jest.fn().mockResolvedValue(uploaded);
      const localUpload = jest.fn().mockResolvedValue({
        bytes: 0,
        filename: 'upload.bin',
        filepath: '/uploads/upload.bin',
      });
      getStrategyFunctions.mockImplementation((src) =>
        src === FileSources.execute_code
          ? { handleFileUpload: codeEnvUpload }
          : { handleFileUpload: localUpload, saveBuffer: jest.fn() },
      );
      return codeEnvUpload;
    };

    it('persists kind:user codeEnvRef for chat attachments (messageAttachment=true)', async () => {
      setupCodeEnvUpload({ storage_session_id: 'sess-1', file_id: 'fid-1' });
      const req = makeReq();
      await processAgentFileUpload({
        req,
        res: mockRes,
        metadata: {
          agent_id: 'agent-abc',
          tool_resource: EToolResources.execute_code,
          file_id: 'file-uuid',
          message_file: true,
        },
      });

      expect(db.createFile).toHaveBeenCalledWith(
        expect.objectContaining({
          metadata: {
            codeEnvRef: {
              kind: 'user',
              id: 'user-123',
              storage_session_id: 'sess-1',
              file_id: 'fid-1',
            },
          },
        }),
        true,
      );
    });

    it('persists kind:agent codeEnvRef for agent setup files (messageAttachment=false)', async () => {
      setupCodeEnvUpload({ storage_session_id: 'sess-2', file_id: 'fid-2' });
      const req = makeReq();
      await processAgentFileUpload({
        req,
        res: mockRes,
        metadata: {
          agent_id: 'agent-abc',
          tool_resource: EToolResources.execute_code,
          file_id: 'file-uuid',
        },
      });

      expect(db.createFile).toHaveBeenCalledWith(
        expect.objectContaining({
          metadata: {
            codeEnvRef: {
              kind: 'agent',
              id: 'agent-abc',
              storage_session_id: 'sess-2',
              file_id: 'fid-2',
            },
          },
        }),
        true,
      );
    });

    it('does not persist legacy fileIdentifier key (mongoose strict drops it)', async () => {
      setupCodeEnvUpload({ storage_session_id: 'sess-3', file_id: 'fid-3' });
      const req = makeReq();
      await processAgentFileUpload({
        req,
        res: mockRes,
        metadata: {
          agent_id: 'agent-abc',
          tool_resource: EToolResources.execute_code,
          file_id: 'file-uuid',
          message_file: true,
        },
      });

      const persisted = db.createFile.mock.calls[0][0];
      expect(persisted.metadata).not.toHaveProperty('fileIdentifier');
    });
  });
});

describe('processFileURL', () => {
  beforeEach(() => {
    jest.clearAllMocks();
  });

  it('throws and skips DB persistence when saveURL returns null', async () => {
    const saveURL = jest.fn().mockResolvedValue(null);
    const getFileURL = jest.fn();
    getStrategyFunctions.mockReturnValue({ saveURL, getFileURL });

    await expect(
      processFileURL({
        fileStrategy: FileSources.local,
        userId: 'user-123',
        URL: 'https://example.com/image.png',
        fileName: 'image.png',
        basePath: 'images',
        context: FileContext.image_generation,
        tenantId: 'tenant-a',
      }),
    ).rejects.toThrow('Strategy "local" did not save "image.png"');

    expect(getFileURL).not.toHaveBeenCalled();
    expect(db.createFile).not.toHaveBeenCalled();
  });

  it('persists tenantId and strategy-returned filepath metadata', async () => {
    const saveURL = jest.fn().mockResolvedValue({
      filepath: 'https://cdn.example.com/t/tenant-a/images/user-123/image.png',
      bytes: 512,
      type: 'image/png',
      dimensions: { width: 32, height: 64 },
    });
    const getFileURL = jest.fn();
    getStrategyFunctions.mockReturnValue({ saveURL, getFileURL });

    await processFileURL({
      fileStrategy: FileSources.cloudfront,
      userId: 'user-123',
      URL: 'https://example.com/image.png',
      fileName: 'image.png',
      basePath: 'images',
      context: FileContext.image_generation,
      tenantId: 'tenant-a',
    });

    expect(getFileURL).not.toHaveBeenCalled();
    expect(db.createFile).toHaveBeenCalledWith(
      expect.objectContaining({
        user: 'user-123',
        filepath: 'https://cdn.example.com/t/tenant-a/images/user-123/image.png',
        bytes: 512,
        filename: 'image.png',
        source: FileSources.cloudfront,
        type: 'image/png',
        context: FileContext.image_generation,
        tenantId: 'tenant-a',
        width: 32,
        height: 64,
      }),
      true,
    );
  });

  it('falls back to getFileURL with user and tenant context when metadata lacks filepath', async () => {
    const saveURL = jest.fn().mockResolvedValue({
      bytes: 256,
      type: 'image/png',
    });
    const getFileURL = jest
      .fn()
      .mockResolvedValue('https://cdn.example.com/t/tenant-a/images/user-123/image.png');
    getStrategyFunctions.mockReturnValue({ saveURL, getFileURL });

    await processFileURL({
      fileStrategy: FileSources.cloudfront,
      userId: 'user-123',
      URL: 'https://example.com/image.png',
      fileName: 'image.png',
      basePath: 'images',
      context: FileContext.image_generation,
      tenantId: 'tenant-a',
    });

    expect(getFileURL).toHaveBeenCalledWith({
      userId: 'user-123',
      fileName: 'image.png',
      basePath: 'images',
      tenantId: 'tenant-a',
    });
    expect(db.createFile).toHaveBeenCalledWith(
      expect.objectContaining({
        filepath: 'https://cdn.example.com/t/tenant-a/images/user-123/image.png',
        tenantId: 'tenant-a',
      }),
      true,
    );
  });

  it('preserves the user path segment for local fallback URLs', async () => {
    const saveURL = jest.fn().mockResolvedValue({
      bytes: 256,
      type: 'image/png',
    });
    const getFileURL = jest.fn().mockResolvedValue('/images/user-123/image.png');
    getStrategyFunctions.mockReturnValue({ saveURL, getFileURL });

    await processFileURL({
      fileStrategy: FileSources.local,
      userId: 'user-123',
      URL: 'https://example.com/image.png',
      fileName: 'image.png',
      basePath: 'images',
      context: FileContext.image_generation,
      tenantId: 'tenant-a',
    });

    expect(getFileURL).toHaveBeenCalledWith({
      userId: 'user-123',
      fileName: 'user-123/image.png',
      basePath: 'images',
      tenantId: 'tenant-a',
    });
    expect(db.createFile).toHaveBeenCalledWith(
      expect.objectContaining({
        filepath: '/images/user-123/image.png',
        tenantId: 'tenant-a',
      }),
      true,
    );
  });
});