#!/usr/bin/env node
// -*- mode: js -*-
// Copyright 2011 Mark Cavage.  All rights reserved.

var fs = require('fs');
var path = require('path');
var url = require('url');

var log4js = require('log4js');
var nopt = require('nopt');

var ldap = require('../lib/index');



///--- Globals

nopt.typeDefs.DN = {
  type: ldap.DN,
  validate: function(data, k, val) {
    data[k] = ldap.parseDN(val);
  }
};

var opts = {
  'attribute': String,
  'debug': Number,
  'binddn': ldap.DN,
  'file': String,
  'password': String,
  'type': String,
  'url': url,
  'value': Array,
};

var shortOpts = {
  'a': ['--attribute'],
  'd': ['--debug'],
  'D': ['--binddn'],
  'f': ['--file'],
  'w': ['--password'],
  't': ['--type'],
  'u': ['--url'],
  'v': ['--value']
};



///--- Helpers

function usage(code, message) {
  var _opts = '';
  Object.keys(shortOpts).forEach(function(k) {
    if (!Array.isArray(shortOpts[k]))
      return;
    var longOpt = shortOpts[k][0].replace('--', '');
    var type = opts[longOpt].name || 'string';
    if (type && type === 'boolean') type = '';
    type = type.toLowerCase();

    _opts += ' [--' + longOpt + ' ' + type + ']';
  });
  _opts += ' DN';

  var msg = (message ? message + '\n' : '') +
    'usage: ' + path.basename(process.argv[1]) + _opts;

  process.stderr.write(msg + '\n');
  process.exit(code);
}


function perror(err) {
  if (parsed.debug) {
    process.stderr.write(err.stack + '\n');
  } else {
    process.stderr.write(err.message + '\n');
  }
  process.exit(1);
}



///--- Mainline

log4js.setGlobalLogLevel('INFO');
var parsed;

try {
  parsed = nopt(opts, shortOpts, process.argv, 2);
} catch (e) {
  usage(1, e.toString());
}

if (parsed.help)
  usage(0);

if (parsed.argv.remain.length < 1)
  usage(1, 'DN required');
try {
  parsed.argv.remain.forEach(function(dn) {
    ldap.parseDN(dn);
  });
} catch (e) {
  usage(1, e.toString());
}

if (!parsed.type)
  parsed.type = 'replace';
if (!parsed.attribute || !Array.isArray(parsed.value))
  usage(1, 'attribute and value required');

if (parsed.debug)
  log4js.setGlobalLogLevel(parsed.debug > 1 ? 'TRACE' : 'DEBUG');
if (!parsed.url)
  parsed.url = 'ldap://127.0.0.1:389';
if (!parsed.binddn)
  parsed.binddn = '';
if (!parsed.password)
  parsed.password = '';

var client = ldap.createClient({
  url: parsed.url,
  log4js: log4js
});

client.on('error', function(err) {
  perror(err);
});

client.bind(parsed.binddn, parsed.password, function(err, res) {
  if (err)
    perror(err);

  var finished = 0;
  var mod = {};
  mod[parsed.attribute] = [];
  parsed.value.forEach(function(v) {
    mod[parsed.attribute].push(v);
  });
  var change = new ldap.Change({
    type: parsed.type,
    modification: mod
  });

  function callback() {
    if (err)
      perror(err);

    if (++finished === parsed.argv.remain.length) {
      client.unbind(function() {
        return;
      });
    }
  }

  parsed.argv.remain.forEach(function(dn) {
    client.modify(dn, change, callback);
  });
});