#!/usr/bin/env node

/**
 * Fix for misleading operator precedence in @octokit/request regex
 * Changes /^text\/|charset=utf-8$/ to /^(text\/|charset=utf-8)$/
 */

const fs = require('fs')

const filesToFix = [
  'node_modules/@actions/github/node_modules/@octokit/request/dist-src/fetch-wrapper.js',
  'node_modules/@actions/github/node_modules/@octokit/request/dist-node/index.js',
  'node_modules/@actions/github/node_modules/@octokit/request/dist-web/index.js',
]

/**
 * Apply regex fix to content
 * @param {string} content - The file content to fix
 * @returns {string} - The fixed content
 */
function applyRegexFix(content) {
  let fixedContent = content

  // Fix the problematic regex pattern - add proper grouping to fix operator precedence
  fixedContent = fixedContent.replace(/\/\^text\\?\/\|charset=utf-8\$?\//g, '/^(text\\/|charset=utf-8)$/')
  fixedContent = fixedContent.replace(/\/\^text\/\|charset=utf-8\$?\//g, '/^(text/|charset=utf-8)$/')

  return fixedContent
}

/**
 * Fix a single file
 * @param {string} filePath - Path to the file to fix
 * @returns {{fixed: boolean, error: string|null}} - Result of the fix operation
 */
function fixFile(filePath) {
  try {
    const content = fs.readFileSync(filePath, 'utf8')
    const originalContent = content
    const fixedContent = applyRegexFix(content)

    if (fixedContent !== originalContent) {
      fs.writeFileSync(filePath, fixedContent, 'utf8')
      return {fixed: true, error: null}
    } else {
      return {fixed: false, error: null}
    }
  } catch (error) {
    return {fixed: false, error: error.message}
  }
}

/**
 * Main function to fix all files
 * @param {string[]} files - Array of file paths to fix
 * @returns {{filesFixed: number, results: Array}} - Summary of fix operations
 */
function fixAllFiles(files = filesToFix) {
  const results = []
  let filesFixed = 0

  for (const filePath of files) {
    const result = fixFile(filePath)
    results.push({filePath, ...result})

    if (result.fixed) {
      filesFixed++
    }
  }

  return {filesFixed, results}
}

// Main execution when run as script
if (require.main === module) {
  process.stdout.write('🔧 Applying regex fix for @octokit/request...\n')

  const {filesFixed, results} = fixAllFiles()

  for (const result of results) {
    if (result.error) {
      if (result.error.includes('ENOENT') || result.error.includes('no such file')) {
        process.stdout.write(`⚠️  File not found: ${result.filePath}\n`)
      } else {
        process.stderr.write(`❌ Error fixing ${result.filePath}: ${result.error}\n`)
      }
    } else if (result.fixed) {
      process.stdout.write(`✅ Fixed: ${result.filePath}\n`)
    } else {
      process.stdout.write(`ℹ️  No changes needed: ${result.filePath}\n`)
    }
  }

  process.stdout.write(`\n🎉 Fix complete! ${filesFixed} files updated.\n`)
  if (filesFixed > 0) {
    process.stdout.write('Run "npm run build:package" to rebuild with the fix.\n')
  }
}

// Export functions for testing
module.exports = {
  applyRegexFix,
  fixFile,
  fixAllFiles,
}