#!/usr/bin/env node
var which = require('../');
if (process.argv.length < 3) usage();

function usage() {
  console.error('usage: which [-as] program ...');
  process.exit(1);
}

var all = false;
var silent = false;
var dashdash = false;
var args = process.argv.slice(2).filter(function (arg) {
  if (dashdash || !/^-/.test(arg)) return true;

  if (arg === '--') {
    dashdash = true;
    return false;
  }

  var flags = arg.substr(1).split('');
  for (var f = 0; f < flags.length; f++) {
    var flag = flags[f];
    switch (flag) {
      case 's':
        silent = true;
        break;
      case 'a':
        all = true;
        break;
      default:
        console.error('which: illegal option -- ' + flag);
        usage();
    }
  }
  return false;
});

process.exit(
  args.reduce(function (pv, current) {
    try {
      var f = which.sync(current, { all: all });
      if (all) f = f.join('\n');
      if (!silent) console.log(f);
      return pv;
    } catch (e) {
      return 1;
    }
  }, 0)
);