#!/usr/bin/env node

const mri = require('mri')
const chalk = require('chalk')
const list = require('./list.js')
const why = require('npm-why/cli-main.js')

const help = `
  ${chalk.bold('nls')} - Missing inspector for npm packages.

  Usage

    $ nls [<target-dir>]      ${chalk.dim('List available npm scripts.')}
    $ nls why <package-name>  ${chalk.dim('Identifies why a package has been installed.')}

  Options

    -h, --help      ${chalk.dim('Output usage information')}
    -v, --version   ${chalk.dim('Output the version number')}

  Examples

    # List npm scripts in current dir
    $ ${chalk.green('nls')}

    # List npm scripts in "node_modules/chalk"
    $ ${chalk.green('nls node_modules/chalk')}

    # Find who depend upon package 'chalk'.
    $ ${chalk.green('nls why chalk')}
`

const args = mri(process.argv.slice(2), {
  boolean: ['help', 'version', 'why'],
  alias: {
    h: 'help',
    v: 'version',
    w: 'why'
  }
})

if (args.help) {
  console.info(help)
} else if (args.version) {
  console.info(require('../package.json').version)
} else if (args._[0] === 'why' && args._.length === 2) {
  why(process.cwd(), args._[1])
} else {
  list()
}