#!/usr/bin/env node

/**
 * NKJV Encoding Fix Utility
 * Converts NKJV markdown files from problematic encoding to clean UTF-8
 */

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

const NKJV_DIR = './NKJV';

function walkDirectory(dir, callback) {
  const entries = fs.readdirSync(dir, { withFileTypes: true });

  for (const entry of entries) {
    const fullPath = path.join(dir, entry.name);

    if (entry.isDirectory()) {
      walkDirectory(fullPath, callback);
    } else if (entry.isFile() && entry.name.endsWith('.md')) {
      callback(fullPath);
    }
  }
}

function fixFileEncoding(filePath) {
  console.log(`Processing: ${filePath}`);

  try {
    // Try to read with UTF-8 first
    let content = fs.readFileSync(filePath, 'utf-8');

    // Check for encoding issues
    const hasReplacementChars = content.includes('\ufffd'); //  character
    const hasCorruptedText = /\w\w/.test(content); // Interspersed replacement chars

    if (hasReplacementChars || hasCorruptedText) {
      console.log(`  ✓ Found encoding issues, fixing...`);

      // Try alternative encodings
      try {
        // Attempt Latin-1 reading
        content = fs.readFileSync(filePath, 'latin1').normalize('NFC');
        console.log(`  ✓ Successfully converted to Latin-1 encoding`);
      } catch (latinError) {
        console.log(`  ✗ Latin-1 conversion failed`);
      }

      // Clean up any remaining encoding artifacts
      content = content
        .replace(/\ufffd/g, '') // Remove replacement characters
        .replace(/^\uFEFF/, '') // Remove UTF-8 BOM if present
        .replace(/\r\n/g, '\n') // Normalize Windows line endings
        .replace(/\r/g, '\n')   // Handle stray carriage returns
        .trim();

      // Write back cleaned content
      fs.writeFileSync(filePath, content, 'utf-8');
      console.log(`  ✓ Fixed and saved: ${filePath}`);
    } else {
      console.log(`  ✓ File appears clean`);
    }

  } catch (error) {
    console.error(`  ✗ Failed to process ${filePath}:`, error.message);
  }
}

console.log('🚀 Starting NKJV encoding fix...');
console.log(`Scanning directory: ${NKJV_DIR}`);
console.log('');

let processedCount = 0;
let fixedCount = 0;

walkDirectory(NKJV_DIR, (filePath) => {
  processedCount++;
  const originalContent = fs.readFileSync(filePath, 'utf-8');
  const originalLength = originalContent.length;

  fixFileEncoding(filePath);

  // Check if file was modified
  try {
    const newContent = fs.readFileSync(filePath, 'utf-8');
    if (!originalContent.includes('\ufffd') && newContent.includes('\ufffd')) {
      console.log(`  ⚠️  No encoding issues found`);
    }
  } catch (checkError) {
    // File exists, just continue
  }
});

console.log('');
console.log('✅ Encoding fix complete!');
console.log(`Processed ${processedCount} files`);
console.log('');
console.log('🔄 Now rebuild your containers:');
console.log('docker-compose build --no-cache');
console.log('docker-compose up -d');