#!/usr/bin/env node
/**
 * Environment Variable Standards Checker - Enforces inst_026
 * Ensures correct environment variable naming (CLAUDE_API_KEY not ANTHROPIC_API_KEY)
 */

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

function checkFile(filePath) {
  const content = fs.readFileSync(filePath, 'utf8');
  const lines = content.split('\n');
  const violations = [];
  
  lines.forEach((line, idx) => {
    // Check for ANTHROPIC_API_KEY usage
    // Check for ANTHROPIC_API_KEY usage (skip comments and documentation)
    if (line.includes('ANTHROPIC_API_KEY') && // OK: SELF-CHECK
        !line.trim().startsWith('//') &&
        !line.trim().startsWith('*') &&
        !line.includes('// OK:') &&
        !line.includes('Wrong:') &&
        !line.includes('CLAUDE_API_KEY')) {
      violations.push({
        file: filePath,
        line: idx + 1,
        text: line.trim(),
        type: 'wrong_env_var',
        message: 'Should use CLAUDE_API_KEY instead of ANTHROPIC_API_KEY (inst_026)'
      });
    }
  });
  
  return violations;
}

function scanFiles(files) {
  const allViolations = [];
  
  files.forEach(file => {
    if (!fs.existsSync(file)) return;
    
    const ext = path.extname(file).toLowerCase();
    if (!['.js', '.ts', '.env'].includes(ext)) return;
    
    if (file.includes('node_modules')) return;
    
    try {
      const violations = checkFile(file);
      allViolations.push(...violations);
    } catch (err) {
      // Skip unreadable files
    }
  });
  
  return allViolations;
}

function main() {
  const args = process.argv.slice(2);
  
  let files = [];
  if (args.length === 0) {
    // Scan staged git files
    try {
      const staged = execSync('git diff --cached --name-only --diff-filter=ACM', {
        encoding: 'utf8'
      });
      files = staged.trim().split('\n').filter(f => f.length > 0);
    } catch (err) {
      console.log('⚠️  Not in git repository');
      process.exit(0);
    }
  } else {
    files = args;
  }
  
  if (files.length === 0) {
    console.log('✅ No files to scan');
    process.exit(0);
  }
  
  console.log(`\n🔍 Environment Variable Standards Check (inst_026)\n`);
  
  const violations = scanFiles(files);
  
  if (violations.length === 0) {
    console.log('✅ Environment variable standards correct\n');
    process.exit(0);
  }
  
  console.log(`❌ Found ${violations.length} violation(s):\n`);
  console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n');
  
  violations.forEach(v => {
    console.log(`🔴 ${v.file}:${v.line}`);
    console.log(`   ${v.message}`);
    console.log(`   Line: ${v.text.substring(0, 80)}`);
    console.log('');
  });
  
  console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n');
  console.log('Fix: Replace ANTHROPIC_API_KEY with CLAUDE_API_KEY\n');
  console.log('Correct: process.env.CLAUDE_API_KEY');
  console.log('Wrong:   process.env.ANTHROPIC_API_KEY\n'); // OK: EXAMPLE
  
  process.exit(1);
}

main();