#!/usr/bin/env node

var Mdx = require('../index')
var Extractor = Mdx.Extractor

if (!process.parent) run()

/**
 * Runs.
 */

function run () {
  var read = require('read-input')
  var argv = yargs().argv
  var ex = new Extractor({
    excludeTags: argv.excludeTag || []
  })

  read(argv._).then(function (res) {
    // non-fatal errors
    if (res.error) console.warn(res.error.message)

    res.files.forEach(function (f) {
      ex.push(f.name, f.data)
    })

    var output = ex.toJson()

    if (argv.format === 'json') {
      console.log(JSON.stringify(output, null, 2))

    } else if (argv.format === 'markdown') {
      output = Mdx.renderTemplate(output)
      process.stdout.write(output)

    } else {
      console.error('unknown format: ' + argv.format)
    }

  }).catch(function (err) {
    console.error(err.stack)
    process.exit(1)
  })
}

function yargs () {
  return require('yargs')
    .version(require('../package.json').version)
    .alias('h', 'help')
    .help('help')
    .option('v', {
      alias: 'version',
      describe: 'Show version info'
    })

    .usage('Usage: $0 <files>')

    .option('format', {
      alias: 'f',
      type: 'string',
      describe: 'set output format {json,markdown}',
      default: 'json'
    })

    .option('exclude-tag', {
      type: 'array',
      alias: 'x',
      describe: 'tags to exclude'
    })

    .example('$0 lib/*.js')
    .showHelpOnFail(false, 'Specify --help for available options')
    .strict()
}