/**
 * Document Security Service
 * Handles watermarking, encryption, and access control
 */

import { getDocumentById, updateDocument } from '@the-order/database';
import { createDocumentAuditLog } from '@the-order/database';

/**
 * Add watermark to document
 * Note: Actual watermarking would require PDF processing library
 */
export async function addWatermark(
  document_id: string,
  watermark_text: string,
  user_id: string
): Promise<void> {
  const document = await getDocumentById(document_id);
  if (!document) {
    throw new Error('Document not found');
  }

  // TODO: Implement actual PDF watermarking
  // This would typically use a library like pdf-lib or pdfkit
  // For now, we'll just log the action

  await createDocumentAuditLog({
    document_id,
    action: 'watermarked',
    performed_by: user_id,
    details: { watermark_text },
  });

  // In a real implementation, you would:
  // 1. Download the document file
  // 2. Apply watermark using PDF library
  // 3. Upload watermarked version
  // 4. Update document record with new file URL
}

/**
 * Redact sensitive information from document
 */
export interface Redaction {
  page: number;
  x: number;
  y: number;
  width: number;
  height: number;
  reason?: string;
}

export async function redactDocument(
  document_id: string,
  redactions: Redaction[],
  user_id: string
): Promise<void> {
  const document = await getDocumentById(document_id);
  if (!document) {
    throw new Error('Document not found');
  }

  // TODO: Implement actual PDF redaction
  // This would typically use a library like pdf-lib

  await createDocumentAuditLog({
    document_id,
    action: 'redacted',
    performed_by: user_id,
    details: { redaction_count: redactions.length, redactions },
  });

  // In a real implementation, you would:
  // 1. Download the document file
  // 2. Apply redactions using PDF library
  // 3. Upload redacted version
  // 4. Create new document version
}

/**
 * Encrypt document
 */
export async function encryptDocument(
  document_id: string,
  encryption_key: string,
  user_id: string
): Promise<void> {
  const document = await getDocumentById(document_id);
  if (!document) {
    throw new Error('Document not found');
  }

  // TODO: Implement actual encryption
  // This would typically encrypt the file content

  await createDocumentAuditLog({
    document_id,
    action: 'encrypted',
    performed_by: user_id,
  });

  await updateDocument(document_id, {
    // Store encryption metadata
    extracted_data: { encrypted: true, encrypted_at: new Date().toISOString() },
  });
}

/**
 * Decrypt document
 */
export async function decryptDocument(
  document_id: string,
  decryption_key: string,
  user_id: string
): Promise<void> {
  const document = await getDocumentById(document_id);
  if (!document) {
    throw new Error('Document not found');
  }

  // TODO: Implement actual decryption

  await createDocumentAuditLog({
    document_id,
    action: 'decrypted',
    performed_by: user_id,
  });
}

