#!/usr/bin/env node
/**
 * Dark Patterns Detector - Enforces inst_079
 * Scans UI code for manipulative patterns
 */

const fs = require('fs');

function checkFile(filePath) {
  const content = fs.readFileSync(filePath, 'utf8');
  const violations = [];
  const lines = content.split('\n');
  
  const darkPatterns = [
    { pattern: /confirm\s*\?\s*:\s*cancel/i, msg: 'Confirm shaming (makes cancel feel negative)' },
    { pattern: /hidden|display:\s*none.*subscribe|newsletter/i, msg: 'Hidden subscription checkbox' },
    { pattern: /setTimeout.*modal|popup/i, msg: 'Timed popup (interrupts user)' },
    { pattern: /onbeforeunload.*subscribe|buy/i, msg: 'Exit popup manipulation' },
    { pattern: /disabled.*unsubscribe|cancel/i, msg: 'Disabled unsubscribe/cancel button' }
  ];
  
  lines.forEach((line, idx) => {
    darkPatterns.forEach(({ pattern, msg }) => {
      if (pattern.test(line)) {
        violations.push({
          file: filePath,
          line: idx + 1,
          text: line.trim(),
          message: msg
        });
      }
    });
  });
  
  return violations;
}

function main() {
  console.log('\n🎨 Dark Patterns Detection (inst_079)\n');
  
  const files = process.argv.slice(2);
  if (files.length === 0) {
    console.log('✅ No files to scan\n');
    process.exit(0);
  }
  
  const allViolations = [];
  files.forEach(file => {
    if (!fs.existsSync(file)) return;
    if (!file.match(/\.(html|js|ts)$/)) return;
    
    try {
      const violations = checkFile(file);
      allViolations.push(...violations);
    } catch (err) {}
  });
  
  if (allViolations.length === 0) {
    console.log('✅ No dark patterns detected\n');
    process.exit(0);
  }
  
  console.log(`❌ Found ${allViolations.length} dark pattern(s):\n`);
  allViolations.forEach(v => {
    console.log(`🔴 ${v.file}:${v.line}`);
    console.log(`   ${v.message}`);
    console.log(`   ${v.text.substring(0, 60)}\n`);
  });
  
  process.exit(1);
}

main();