'use strict'

var fs = require('fs')
var highlight = require('./highlight')

function isFunction(obj) {
  return toString.call(obj) === '[object Function]'
}

module.exports = function highlightFile(fullPath, opts, cb) {
  if (isFunction(opts)) {
    cb = opts
    opts = { }
  }
  opts = opts || { }

  fs.readFile(fullPath, 'utf-8', function(err, code) {
    if (err) return cb(err)
    try {
      cb(null, highlight(code, opts))
    } catch (e) {
      cb(e)
    }
  })
}