/**
 * extract-deep.js — Deep extraction of specific config values, script parameters,
 * and operational details that the high-level extractors miss.
 * 
 * Targets the specific data points that Confluence reference docs contain
 * but our generated docs don't surface.
 */

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

const IGNORE_DIRS = new Set([
  'node_modules', '.git', 'venv', '.terraform', '__pycache__',
  '_bmad', '_bmad-output', '.codex', '.claude', '.cursor', '.gemini',
  '.kiro', '.agents', 'dist', 'build', 'coverage'
]);

function walk(dir, filter, results = []) {
  try {
    for (const entry of fs.readdirSync(dir, { withFileTypes: true })) {
      if (IGNORE_DIRS.has(entry.name)) continue;
      const full = path.join(dir, entry.name);
      if (entry.isDirectory()) {
        walk(full, filter, results);
      } else if (filter(entry.name)) {
        results.push(full);
      }
    }
  } catch {}
  return results;
}

/**
 * Extract EKS/GKE/AKS addon versions from values.yaml files.
 */
function extractAddonVersions(srcRoot) {
  const addons = [];
  const files = walk(srcRoot, f => f === 'values.yaml');
  
  for (const file of files) {
    try {
      const content = fs.readFileSync(file, 'utf8');
      const relPath = path.relative(srcRoot, file);
      
      // Match addon blocks with name + version
      const lines = content.split('\n');
      for (let i = 0; i < lines.length; i++) {
        const nameMatch = lines[i].match(/^\s*-?\s*name:\s*["']?([^\s"']+)/);
        if (nameMatch) {
          // Look for version on next few lines
          for (let j = i + 1; j < Math.min(i + 5, lines.length); j++) {
            const verMatch = lines[j].match(/version:\s*["']?([^\s"']+)/);
            if (verMatch) {
              addons.push({
                name: nameMatch[1],
                version: verMatch[1],
                file: relPath,
              });
              break;
            }
          }
        }
      }
    } catch {}
  }
  
  return addons;
}

/**
 * Extract Terraform resource configurations (RDS, VPC, etc.) with specific values.
 */
function extractTerraformConfigs(srcRoot) {
  const configs = [];
  const files = walk(srcRoot, f => f.endsWith('.tf'));
  
  for (const file of files) {
    try {
      const content = fs.readFileSync(file, 'utf8');
      const relPath = path.relative(srcRoot, file);
      
      // Extract key config values
      const patterns = [
        { key: 'backup_retention_period', regex: /backup_retention_period\s*=\s*(\d+)/ },
        { key: 'backup_window', regex: /backup_window\s*=\s*"([^"]+)"/ },
        { key: 'engine_version', regex: /engine_version\s*=\s*"([^"]+)"/ },
        { key: 'instance_class', regex: /instance_class\s*=\s*"([^"]+)"/ },
        { key: 'allocated_storage', regex: /allocated_storage\s*=\s*(\d+)/ },
        { key: 'multi_az', regex: /multi_az\s*=\s*(true|false)/ },
        { key: 'deletion_protection', regex: /deletion_protection\s*=\s*(true|false)/ },
        { key: 'node_count', regex: /(?:node_count|desired_size|min_size|max_size)\s*=\s*(\d+)/ },
        { key: 'machine_type', regex: /(?:machine_type|instance_type|vm_size)\s*=\s*"([^"]+)"/ },
      ];
      
      for (const p of patterns) {
        const match = content.match(p.regex);
        if (match) {
          configs.push({ key: p.key, value: match[1], file: relPath });
        }
      }
    } catch {}
  }
  
  return configs;
}

/**
 * Extract script parameters (timeouts, retries, poll intervals).
 */
function extractScriptParams(srcRoot) {
  const params = [];
  const files = walk(srcRoot, f => f.endsWith('.sh') || f.endsWith('.py'));
  
  for (const file of files) {
    try {
      const content = fs.readFileSync(file, 'utf8');
      const relPath = path.relative(srcRoot, file);
      
      const lines = content.split('\n');
      for (const line of lines) {
        // Match variable assignments with numeric values and comments
        const match = line.match(/^([A-Z_]+)\s*=\s*(\d+)\s*(?:#\s*(.+))?/);
        if (match) {
          params.push({
            name: match[1],
            value: match[2],
            comment: match[3] || '',
            file: relPath,
          });
        }
      }
    } catch {}
  }
  
  return params;
}

/**
 * Extract Helm template specific values (product IDs, OU IDs, etc.).
 */
function extractHelmTemplateValues(srcRoot) {
  const values = [];
  const files = walk(srcRoot, f => f.endsWith('.yaml') || f.endsWith('.yml'));
  
  for (const file of files) {
    try {
      const content = fs.readFileSync(file, 'utf8');
      const relPath = path.relative(srcRoot, file);
      
      // Extract specific identifiers
      const patterns = [
        { key: 'product_id', regex: /(?:product[_-]?id|productId)\s*[:=]\s*"?([a-z]+-[a-z0-9]+)"?/i },
        { key: 'ou_id', regex: /(?:ou[_-]?id|organizationalUnit)\s*[:=]\s*"?(ou-[a-z0-9-]+)"?/i },
        { key: 'account_id', regex: /(?:account[_-]?id|accountId)\s*[:=]\s*"?(\d{12})"?/ },
        { key: 'host_project', regex: /(?:hostProject|host_project)\s*[:=]\s*"?([a-z][-a-z0-9]+)"?/ },
        { key: 'shared_vpc', regex: /sharedVpc[\s\S]*?enabled:\s*(true|false)/m },
      ];
      
      for (const p of patterns) {
        const match = content.match(p.regex);
        if (match) {
          values.push({ key: p.key, value: match[1], file: relPath });
        }
      }
    } catch {}
  }
  
  // Deduplicate
  const seen = new Set();
  return values.filter(v => {
    const k = `${v.key}:${v.value}`;
    if (seen.has(k)) return false;
    seen.add(k);
    return true;
  });
}

/**
 * Extract state management services from Helm chart names.
 */
function extractStateServices(srcRoot) {
  const stateCharts = ['elasticsearch', 'hazelcast', 'redis', 'milvus', 'cassandra', 'kafka', 'rabbitmq', 'postgresql', 'mysql', 'mongodb'];
  const found = [];
  
  const files = walk(srcRoot, f => f === 'Chart.yaml');
  for (const file of files) {
    try {
      const content = fs.readFileSync(file, 'utf8');
      const nameMatch = content.match(/name:\s*(.+)/);
      if (nameMatch) {
        const name = nameMatch[1].trim();
        if (stateCharts.some(s => name.toLowerCase().includes(s))) {
          const relPath = path.relative(srcRoot, file);
          const versionMatch = content.match(/(?:appVersion|version):\s*(.+)/);
          found.push({
            name,
            version: versionMatch ? versionMatch[1].trim() : null,
            path: path.dirname(relPath),
          });
        }
      }
    } catch {}
  }
  
  return found;
}

/**
 * Run all deep extractors.
 */
function extractDeep(srcRoot) {
  console.log('Running deep extraction...');
  const addons = extractAddonVersions(srcRoot);
  console.log(`  Addon versions: ${addons.length}`);
  const tfConfigs = extractTerraformConfigs(srcRoot);
  console.log(`  TF configs: ${tfConfigs.length}`);
  const scriptParams = extractScriptParams(srcRoot);
  console.log(`  Script params: ${scriptParams.length}`);
  const helmValues = extractHelmTemplateValues(srcRoot);
  console.log(`  Helm template values: ${helmValues.length}`);
  const stateServices = extractStateServices(srcRoot);
  console.log(`  State services: ${stateServices.length}`);
  
  return { addons, tfConfigs, scriptParams, helmValues, stateServices };
}

module.exports = { extractDeep, extractAddonVersions, extractTerraformConfigs, extractScriptParams, extractHelmTemplateValues, extractStateServices };