import { GluegunCommand } from 'gluegun'

/**
 * Examples of filesystem operations with Gluegun
 */
const command: GluegunCommand = {
  name: 'filesystem',
  description: 'Filesystem operation examples',

  run: async (toolbox) => {
    const { filesystem, print } = toolbox

    print.info('=== Filesystem Examples ===\n')

    // 1. Read file
    print.info('1. Read file')
    const packageJson = await filesystem.read('package.json', 'json')
    if (packageJson) {
      print.success(`Project: ${packageJson.name}`)
    }

    // 2. Write file
    print.info('\n2. Write file')
    await filesystem.write('temp-output.txt', 'Hello from Gluegun!', {
      atomic: true // Ensures file is written completely or not at all
    })
    print.success('File written: temp-output.txt')

    // 3. Check if file exists
    print.info('\n3. Check existence')
    const exists = filesystem.exists('temp-output.txt')
    print.info(`temp-output.txt exists: ${exists}`)

    // 4. Create directory
    print.info('\n4. Create directory')
    await filesystem.dir('temp-dir/nested/deep')
    print.success('Created nested directories')

    // 5. List files
    print.info('\n5. List files')
    const files = filesystem.list('.')
    print.info(`Files in current directory: ${files?.length || 0}`)

    // 6. Find files with pattern
    print.info('\n6. Find files')
    const tsFiles = filesystem.find('.', { matching: '*.ts', recursive: false })
    print.info(`TypeScript files found: ${tsFiles?.length || 0}`)
    tsFiles?.slice(0, 5).forEach(file => print.info(`  - ${file}`))

    // 7. Copy file/directory
    print.info('\n7. Copy operations')
    await filesystem.copy('temp-output.txt', 'temp-dir/copy.txt')
    print.success('File copied to temp-dir/copy.txt')

    // 8. Move/rename
    print.info('\n8. Move/rename')
    await filesystem.move('temp-output.txt', 'temp-dir/moved.txt')
    print.success('File moved to temp-dir/moved.txt')

    // 9. Read directory tree
    print.info('\n9. Directory tree')
    const tree = filesystem.inspectTree('temp-dir')
    print.info(`Temp directory structure:`)
    print.info(JSON.stringify(tree, null, 2))

    // 10. File info
    print.info('\n10. File info')
    const info = filesystem.inspect('temp-dir/moved.txt')
    if (info) {
      print.info(`File type: ${info.type}`)
      print.info(`File size: ${info.size} bytes`)
    }

    // 11. Append to file
    print.info('\n11. Append to file')
    await filesystem.append('temp-dir/moved.txt', '\nAppended line')
    print.success('Content appended')

    // 12. Read file with encoding
    print.info('\n12. Read with encoding')
    const content = await filesystem.read('temp-dir/moved.txt', 'utf8')
    print.info(`Content: ${content}`)

    // 13. Path utilities
    print.info('\n13. Path utilities')
    const fullPath = filesystem.path('temp-dir', 'moved.txt')
    print.info(`Full path: ${fullPath}`)
    print.info(`Current directory: ${filesystem.cwd()}`)
    print.info(`Path separator: ${filesystem.separator}`)

    // 14. Find by extension
    print.info('\n14. Find by extension')
    const jsonFiles = filesystem.find('.', {
      matching: '*.json',
      recursive: false
    })
    print.info(`JSON files: ${jsonFiles?.join(', ')}`)

    // 15. Remove files (cleanup)
    print.info('\n15. Cleanup')
    await filesystem.remove('temp-dir')
    print.success('Removed temp directory')

    // Summary
    print.info('\n=== Summary ===')
    print.success('Filesystem operations completed!')
    print.info('Common operations:')
    print.info('  - read/write: Handle file content')
    print.info('  - exists: Check file/directory existence')
    print.info('  - dir: Create directories')
    print.info('  - find: Search for files')
    print.info('  - copy/move: Manipulate files')
    print.info('  - remove: Delete files/directories')
  }
}

module.exports = command