import * as fs from 'fs'
import { Command } from 'commander'
import { loadConfig, migrateConfigIfNeeded } from '../lib/config'

// Simplified command to just list configured image names
export async function cmdList(options: {
  imageName?: string
}): Promise<number> {
  try {
    const configPath = migrateConfigIfNeeded()

    // Check if config file exists
    if (!fs.existsSync(configPath)) {
      console.log(`No configuration file found at ${configPath}`)
      console.log('Run "zzup init" to create a new configuration.')
      return 0
    }

    // Load config
    const config = loadConfig()

    // Get image names
    const imageNames = Object.keys(config)

    if (imageNames.length === 0) {
      console.log(`No images configured in ${configPath}`)
      return 0
    }

    // If specific image name is provided, only show that one
    if (options.imageName) {
      if (!config[options.imageName]) {
        console.error(`Image "${options.imageName}" not found in configuration`)
        return 1
      }

      process.stdout.write(`${options.imageName}\n`)
      return 0
    }

    // Simply list all configured image names
    for (const imageName of imageNames) {
      process.stdout.write(`${imageName}\n`)
    }

    return 0
  } catch (error) {
    console.error(`Error listing images: ${error}`)
    return 1
  }
}

// Function to configure the list command
export function configureListCommand(command: Command): Command {
  return command.option(
    '--image-name <name>',
    'Name of a specific image to list'
  )
}