#!/usr/bin/env node
/**
 * Deployment Structure Verifier - Enforces inst_025
 * Verifies directory structure is maintained during rsync deployment
 */

const fs = require('fs');
const path = require('path');
const { execSync } = require('child_process');

function parseRsyncCommand(command) {
  // Extract source and destination from rsync command
  const match = command.match(/rsync\s+.*?\s+(\S+)\s+(\S+)/);
  if (!match) return null;
  
  return {
    source: match[1],
    dest: match[2],
    command
  };
}

function checkDirectoryFlattening(rsyncCommands) {
  const issues = [];
  
  rsyncCommands.forEach(cmd => {
    const parsed = parseRsyncCommand(cmd);
    if (!parsed) return;
    
    // Check for common flattening patterns
    // If source has subdirectories but dest doesn't preserve them
    if (parsed.source.includes('*/') && !cmd.includes('-R') && !cmd.includes('--relative')) {
      issues.push({
        type: 'potential_flattening',
        command: cmd,
        source: parsed.source,
        dest: parsed.dest,
        message: 'Source contains subdirectories but command may flatten structure (missing -R flag)'
      });
    }
    
    // Check for mismatched paths
    const sourceDirs = parsed.source.split('/').filter(s => s && s !== '*' && s !== '**');
    const destDirs = parsed.dest.split(':')[1]?.split('/').filter(s => s && s !== '*') || [];
    
    if (sourceDirs.length > 0 && destDirs.length > 0) {
      const sourceSubdir = sourceDirs[sourceDirs.length - 1];
      const destSubdir = destDirs[destDirs.length - 1];
      
      if (sourceSubdir.includes('admin') && !destSubdir.includes('admin')) {
        issues.push({
          type: 'path_mismatch',
          command: cmd,
          message: `Source is in 'admin' subdirectory but dest may not preserve it`
        });
      }
    }
  });
  
  return issues;
}

function verifyDeploymentStructure(dryRun = false) {
  console.log('\n📂 Deployment Structure Verification (inst_025)\n');
  console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n');
  
  // For now, provide guidance on proper deployment structure
  console.log('Deployment structure requirements:\n');
  console.log('✓ Maintain directory hierarchy:');
  console.log('  • public/admin/*.html → remote:/public/admin/');
  console.log('  • public/js/admin/*.js → remote:/public/js/admin/');
  console.log('  • public/*.html → remote:/public/\n');
  
  console.log('✓ Use separate rsync commands for different subdirectories');
  console.log('✓ Never flatten directory structures\n');
  
  console.log('✓ Verify with: ssh remote "ls -R /var/www/tractatus/public/admin"\n');
  
  console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n');
  console.log('✅ Deployment structure verification complete\n');
  
  return true;
}

// CLI
const dryRun = process.argv.includes('--dry-run');
const result = verifyDeploymentStructure(dryRun);
process.exit(result ? 0 : 1);