#!/usr/bin/env node
/**
 * Confidential Document Scanner - Enforces inst_012, inst_015
 * Prevents deployment of internal/confidential documents
 */

const fs = require('fs');
const path = require('path');

// File patterns that indicate confidential/internal documents
const CONFIDENTIAL_PATTERNS = [
  /session[-_]?handoff/i,
  /phase[-_]?planning/i,
  /cost[-_]?estimate/i,
  /infrastructure[-_]?plan/i,
  /progress[-_]?report/i,
  /cover[-_]?letter/i,
  /testing[-_]?checklist/i,
  /internal/i,
  /confidential/i,
  /private/i,
  /draft/i,
  /wip[-_]/i, // work in progress
  /todo/i
];

// Content markers that indicate confidential information
const CONFIDENTIAL_CONTENT_MARKERS = [
  /\[INTERNAL\]/i,
  /\[CONFIDENTIAL\]/i,
  /\[DRAFT\]/i,
  /\[DO NOT PUBLISH\]/i,
  /\[WIP\]/i,
  /CONFIDENTIAL:/i,
  /INTERNAL ONLY:/i
];

function checkFilePath(filePath) {
  const basename = path.basename(filePath);
  
  for (const pattern of CONFIDENTIAL_PATTERNS) {
    if (pattern.test(basename) || pattern.test(filePath)) {
      return {
        confidential: true,
        reason: `Filename matches confidential pattern: ${pattern.source}`
      };
    }
  }
  
  return { confidential: false };
}

function checkFileContent(filePath) {
  try {
    const content = fs.readFileSync(filePath, 'utf8');
    const lines = content.split('\n');
    
    for (let i = 0; i < Math.min(20, lines.length); i++) {
      for (const marker of CONFIDENTIAL_CONTENT_MARKERS) {
        if (marker.test(lines[i])) {
          return {
            confidential: true,
            reason: `Content contains confidential marker at line ${i+1}: ${marker.source}`,
            line: i + 1,
            text: lines[i].trim()
          };
        }
      }
    }
    
    return { confidential: false };
  } catch (err) {
    // Can't read file (binary, etc.) - check by path only
    return { confidential: false };
  }
}

function scanFile(filePath) {
  // Skip non-document files
  const ext = path.extname(filePath).toLowerCase();
  if (!['.md', '.txt', '.pdf', '.doc', '.docx', '.html'].includes(ext)) {
    return null;
  }
  
  // Check filename
  const pathCheck = checkFilePath(filePath);
  if (pathCheck.confidential) {
    return { file: filePath, ...pathCheck };
  }
  
  // Check content
  const contentCheck = checkFileContent(filePath);
  if (contentCheck.confidential) {
    return { file: filePath, ...contentCheck };
  }
  
  return null;
}

function main() {
  const args = process.argv.slice(2);
  
  if (args.length === 0) {
    console.log('Usage: check-confidential-docs.js <file1> [file2] ...');
    console.log('');
    console.log('Scans files to prevent deployment of internal/confidential documents');
    process.exit(0);
  }
  
  console.log(`\n🔍 Scanning ${args.length} file(s) for confidential markers...\n`);
  
  const findings = [];
  
  args.forEach(file => {
    if (!fs.existsSync(file)) return;
    
    const result = scanFile(file);
    if (result) {
      findings.push(result);
    }
  });
  
  if (findings.length === 0) {
    console.log('✅ No confidential documents detected\n');
    process.exit(0);
  }
  
  // Report findings
  console.log(`❌ Found ${findings.length} confidential document(s):\n`);
  console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n');
  
  findings.forEach(f => {
    console.log(`🔴 ${f.file}`);
    console.log(`   Reason: ${f.reason}`);
    if (f.text) {
      console.log(`   Line ${f.line}: ${f.text.substring(0, 60)}...`);
    }
    console.log('');
  });
  
  console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n');
  console.log('⚠️  DEPLOYMENT BLOCKED (inst_012/inst_015)\n');
  console.log('These documents are marked confidential/internal.');
  console.log('');
  console.log('Actions:');
  console.log('  1. Remove confidential markers if approved for public release');
  console.log('  2. Move to a non-public directory');
  console.log('  3. Get explicit human approval before deploying\n');
  
  process.exit(1);
}

main();