#!/usr/bin/env node

const path = require('path');
const { Command } = require('commander');
const program = new Command();

const errorColor = (str) => {
  // Add ANSI escape codes to display text in red.
  return `\x1b[31m${str}\x1b[0m`;
}

program
  .name(path.parse(process.argv[1]).base)
  .version('0.0.1')
  .description('Install package with fake package manager')
  .usage("-n 3 32 -l x y z -- op")
  .configureOutput({
    // Visibly override write routines as example!
    //writeOut: (str) => process.stdout.write(`[OUT] ${str}`),
    writeErr: (str) => process.stdout.write(`[ERR] ${str}`),
    // Highlight errors in color.
    outputError: (str, write) => write(errorColor(str))
  });

program
  .option('-n, --number <numbers...>', 'specify numbers')
  .option('-l, --letter [letters...]', 'specify letters')
  .parse();

// console.log('options array');
// console.log(program.options.map(o => o.flags));

// console.log('visible options');
// const helper = program.createHelp();
// console.log(helper.visibleOptions(program).map(o => o.flags));

if (Object.keys(program.opts()).length || program.args.length) {
  console.log('Options: ', program.opts());
  console.log('Remaining arguments: ', program.args);
} else {
  program.outputHelp();
}