var fs = require('fs');
var core;
if (process.platform === 'win32' || global.TESTING_WINDOWS) {
  core = require('./windows.js');
} else {
  core = require('./mode.js');
}

module.exports = isexe;
isexe.sync = sync;

function isexe(path, options, cb) {
  if (typeof options === 'function') {
    cb = options;
    options = {};
  }

  if (!cb) {
    if (typeof Promise !== 'function') {
      throw new TypeError('callback not provided');
    }

    return new Promise(function (resolve, reject) {
      isexe(path, options || {}, function (er, is) {
        if (er) {
          reject(er);
        } else {
          resolve(is);
        }
      });
    });
  }

  core(path, options || {}, function (er, is) {
    // ignore EACCES because that just means we aren't allowed to run it
    if (er) {
      if (er.code === 'EACCES' || (options && options.ignoreErrors)) {
        er = null;
        is = false;
      }
    }
    cb(er, is);
  });
}

function sync(path, options) {
  // my kingdom for a filtered catch
  try {
    return core.sync(path, options || {});
  } catch (er) {
    if ((options && options.ignoreErrors) || er.code === 'EACCES') {
      return false;
    } else {
      throw er;
    }
  }
}