module.exports = function pathinfo(path, options) {
  //  discuss at: https://locutus.io/php/pathinfo/
  // original by: Nate
  //  revised by: Kevin van Zonneveld (https://kvz.io)
  // improved by: Brett Zamir (https://brett-zamir.me)
  // improved by: Dmitry Gorelenkov
  //    input by: Timo
  //      note 1: Inspired by actual PHP source: php5-5.2.6/ext/standard/string.c line #1559
  //      note 1: The way the bitwise arguments are handled allows for greater flexibility
  //      note 1: & compatability. We might even standardize this
  //      note 1: code and use a similar approach for
  //      note 1: other bitwise PHP functions
  //      note 1: Locutus tries very hard to stay away from a core.js
  //      note 1: file with global dependencies, because we like
  //      note 1: that you can just take a couple of functions and be on your way.
  //      note 1: But by way we implemented this function,
  //      note 1: if you want you can still declare the PATHINFO_*
  //      note 1: yourself, and then you can use:
  //      note 1: pathinfo('/www/index.html', PATHINFO_BASENAME | PATHINFO_EXTENSION);
  //      note 1: which makes it fully compliant with PHP syntax.
  //   example 1: pathinfo('/www/htdocs/index.html', 1)
  //   returns 1: '/www/htdocs'
  //   example 2: pathinfo('/www/htdocs/index.html', 'PATHINFO_BASENAME')
  //   returns 2: 'index.html'
  //   example 3: pathinfo('/www/htdocs/index.html', 'PATHINFO_EXTENSION')
  //   returns 3: 'html'
  //   example 4: pathinfo('/www/htdocs/index.html', 'PATHINFO_FILENAME')
  //   returns 4: 'index'
  //   example 5: pathinfo('/www/htdocs/index.html', 2 | 4)
  //   returns 5: {basename: 'index.html', extension: 'html'}
  //   example 6: pathinfo('/www/htdocs/index.html', 'PATHINFO_ALL')
  //   returns 6: {dirname: '/www/htdocs', basename: 'index.html', extension: 'html', filename: 'index'}
  //   example 7: pathinfo('/www/htdocs/index.html')
  //   returns 7: {dirname: '/www/htdocs', basename: 'index.html', extension: 'html', filename: 'index'}

  const basename = require('../filesystem/basename')
  let opt = ''
  let realOpt = ''
  let optName = ''
  let optTemp = 0
  const tmpArr = {}
  let cnt = 0
  let i = 0
  let haveBasename = false
  let haveExtension = false
  let haveFilename = false

  // Input defaulting & sanitation
  if (!path) {
    return false
  }
  if (!options) {
    options = 'PATHINFO_ALL'
  }

  // Initialize binary arguments. Both the string & integer (constant) input is
  // allowed
  const OPTS = {
    PATHINFO_DIRNAME: 1,
    PATHINFO_BASENAME: 2,
    PATHINFO_EXTENSION: 4,
    PATHINFO_FILENAME: 8,
    PATHINFO_ALL: 0,
  }
  // PATHINFO_ALL sums up all previously defined PATHINFOs (could just pre-calculate)
  for (optName in OPTS) {
    if (OPTS.hasOwnProperty(optName)) {
      OPTS.PATHINFO_ALL = OPTS.PATHINFO_ALL | OPTS[optName]
    }
  }
  if (typeof options !== 'number') {
    // Allow for a single string or an array of string flags
    options = [].concat(options)
    for (i = 0; i < options.length; i++) {
      // Resolve string input to bitwise e.g. 'PATHINFO_EXTENSION' becomes 4
      if (OPTS[options[i]]) {
        optTemp = optTemp | OPTS[options[i]]
      }
    }
    options = optTemp
  }

  // Internal Functions
  const _getExt = function (path) {
    const str = path + ''
    const dotP = str.lastIndexOf('.') + 1
    return !dotP ? false : dotP !== str.length ? str.substr(dotP) : ''
  }

  // Gather path infos
  if (options & OPTS.PATHINFO_DIRNAME) {
    const dirName = path.replace(/\\/g, '/').replace(/\/[^/]*\/?$/, '') // dirname
    tmpArr.dirname = dirName === path ? '.' : dirName
  }

  if (options & OPTS.PATHINFO_BASENAME) {
    if (haveBasename === false) {
      haveBasename = basename(path)
    }
    tmpArr.basename = haveBasename
  }

  if (options & OPTS.PATHINFO_EXTENSION) {
    if (haveBasename === false) {
      haveBasename = basename(path)
    }
    if (haveExtension === false) {
      haveExtension = _getExt(haveBasename)
    }
    if (haveExtension !== false) {
      tmpArr.extension = haveExtension
    }
  }

  if (options & OPTS.PATHINFO_FILENAME) {
    if (haveBasename === false) {
      haveBasename = basename(path)
    }
    if (haveExtension === false) {
      haveExtension = _getExt(haveBasename)
    }
    if (haveFilename === false) {
      haveFilename = haveBasename.slice(
        0,
        haveBasename.length - (haveExtension ? haveExtension.length + 1 : haveExtension === false ? 0 : 1),
      )
    }

    tmpArr.filename = haveFilename
  }

  // If array contains only 1 element: return string
  cnt = 0
  for (opt in tmpArr) {
    if (tmpArr.hasOwnProperty(opt)) {
      cnt++
      realOpt = opt
    }
  }
  if (cnt === 1) {
    return tmpArr[realOpt]
  }

  // Return full-blown array
  return tmpArr
}