text: 'use strict';
  'require view';
  'require dom';
  'require poll';
  'require rpc';
  'require uci';
  'require form';
  'require validation';
  
  var callHostHints, callDUIDHints, callDHCPLeases, CBILeaseStatus, CBILease6Status;
  
  callHostHints = rpc.declare({
  	object: 'luci-rpc',
  	method: 'getHostHints',
  	expect: { '': {} }
  });
  
  callDUIDHints = rpc.declare({
  	object: 'luci-rpc',
  	method: 'getDUIDHints',
  	expect: { '': {} }
  });
  
  callDHCPLeases = rpc.declare({
  	object: 'luci-rpc',
  	method: 'getDHCPLeases',
  	expect: { '': {} }
  });
  
  CBILeaseStatus = form.DummyValue.extend({
  	renderWidget: function(section_id, option_id, cfgvalue) {
  		return E([
  			E('h4', _('Active DHCP Leases')),
  			E('table', { 'id': 'lease_status_table', 'class': 'table' }, [
  				E('tr', { 'class': 'tr table-titles' }, [
  					E('th', { 'class': 'th' }, _('Hostname')),
  					E('th', { 'class': 'th' }, _('IPv4-Address')),
  					E('th', { 'class': 'th' }, _('MAC-Address')),
  					E('th', { 'class': 'th' }, _('Lease time remaining'))
  				]),
  				E('tr', { 'class': 'tr placeholder' }, [
  					E('td', { 'class': 'td' }, E('em', _('Collecting data...')))
  				])
  			])
  		]);
  	}
  });
  
  CBILease6Status = form.DummyValue.extend({
  	renderWidget: function(section_id, option_id, cfgvalue) {
  		return E([
  			E('h4', _('Active DHCPv6 Leases')),
  			E('table', { 'id': 'lease6_status_table', 'class': 'table' }, [
  				E('tr', { 'class': 'tr table-titles' }, [
  					E('th', { 'class': 'th' }, _('Host')),
  					E('th', { 'class': 'th' }, _('IPv6-Address')),
  					E('th', { 'class': 'th' }, _('DUID')),
  					E('th', { 'class': 'th' }, _('Lease time remaining'))
  				]),
  				E('tr', { 'class': 'tr placeholder' }, [
  					E('td', { 'class': 'td' }, E('em', _('Collecting data...')))
  				])
  			])
  		]);
  	}
  });
  
  function validateHostname(sid, s) {
  	if (s == null || s == '')
  		return true;
  
  	if (s.length > 256)
  		return _('Expecting: %s').format(_('valid hostname'));
  
  	var labels = s.replace(/^\.+|\.$/g, '').split(/\./);
  
  	for (var i = 0; i < labels.length; i++)
  		if (!labels[i].match(/^[a-z0-9_](?:[a-z0-9-]{0,61}[a-z0-9])?$/i))
  			return _('Expecting: %s').format(_('valid hostname'));
  
  	return true;
  }
  
  function validateAddressList(sid, s) {
  	if (s == null || s == '')
  		return true;
  
  	var m = s.match(/^\/(.+)\/$/),
  	    names = m ? m[1].split(/\//) : [ s ];
  
  	for (var i = 0; i < names.length; i++) {
  		var res = validateHostname(sid, names[i]);
  
  		if (res !== true)
  			return res;
  	}
  
  	return true;
  }
  
  function validateServerSpec(sid, s) {
  	if (s == null || s == '')
  		return true;
  
  	var m = s.match(/^(?:\/(.+)\/)?(.*)$/);
  	if (!m)
  		return _('Expecting: %s').format(_('valid hostname'));
  
  	var res = validateAddressList(sid, m[1]);
  	if (res !== true)
  		return res;
  
  	if (m[2] == '' || m[2] == '#')
  		return true;
  
  	// ipaddr%scopeid#srvport@source@interface#srcport
  
  	m = m[2].match(/^([0-9a-f:.]+)(?:%[^#@]+)?(?:#(\d+))?(?:@([0-9a-f:.]+)(?:@[^#]+)?(?:#(\d+))?)?$/);
  
  	if (!m)
  		return _('Expecting: %s').format(_('valid IP address'));
  
  	if (validation.parseIPv4(m[1])) {
  		if (m[3] != null && !validation.parseIPv4(m[3]))
  			return _('Expecting: %s').format(_('valid IPv4 address'));
  	}
  	else if (validation.parseIPv6(m[1])) {
  		if (m[3] != null && !validation.parseIPv6(m[3]))
  			return _('Expecting: %s').format(_('valid IPv6 address'));
  	}
  	else {
  		return _('Expecting: %s').format(_('valid IP address'));
  	}
  
  	if ((m[2] != null && +m[2] > 65535) || (m[4] != null && +m[4] > 65535))
  		return _('Expecting: %s').format(_('valid port value'));
  
  	return true;
  }
  
  return view.extend({
  	load: function() {
  		return Promise.all([
  			callHostHints(),
  			callDUIDHints()
  		]);
  	},
  
  	render: function(hosts_duids) {
  		var has_dhcpv6 = L.hasSystemFeature('dnsmasq', 'dhcpv6') || L.hasSystemFeature('odhcpd'),
  		    hosts = hosts_duids[0],
  		    duids = hosts_duids[1],
  		    m, s, o, ss, so;
  
  		m = new form.Map('dhcp', _('DHCP and DNS'), _('Dnsmasq is a combined <abbr title="Dynamic Host Configuration Protocol">DHCP</abbr>-Server and <abbr title="Domain Name System">DNS</abbr>-Forwarder for <abbr title="Network Address Translation">NAT</abbr> firewalls'));
  
  		s = m.section(form.TypedSection, 'dnsmasq', _('Server Settings'));
  		s.anonymous = true;
  		s.addremove = false;
  
  		s.tab('general', _('General Settings'));
  		s.tab('files', _('Resolv and Hosts Files'));
  		s.tab('tftp', _('TFTP Settings'));
  		s.tab('advanced', _('Advanced Settings'));
  		s.tab('leases', _('Static Leases'));
  
  		s.taboption('general', form.Flag, 'domainneeded',
  			_('Domain required'),
  			_('Don\'t forward <abbr title="Domain Name System">DNS</abbr>-Requests without <abbr title="Domain Name System">DNS</abbr>-Name'));
  
  		s.taboption('general', form.Flag, 'authoritative',
  			_('Authoritative'),
  			_('This is the only <abbr title="Dynamic Host Configuration Protocol">DHCP</abbr> in the local network'));
  
  
  		s.taboption('files', form.Flag, 'readethers',
  			_('Use <code>/etc/ethers</code>'),
  			_('Read <code>/etc/ethers</code> to configure the <abbr title="Dynamic Host Configuration Protocol">DHCP</abbr>-Server'));
  
  		s.taboption('files', form.Value, 'leasefile',
  			_('Leasefile'),
  			_('file where given <abbr title="Dynamic Host Configuration Protocol">DHCP</abbr>-leases will be stored'));
  
  		s.taboption('files', form.Flag, 'noresolv',
  			_('Ignore resolve file')).optional = true;
  
  		o = s.taboption('files', form.Value, 'resolvfile',
  			_('Resolve file'),
  			_('local <abbr title="Domain Name System">DNS</abbr> file'));
  
  		o.depends('noresolv', '0');
  		o.placeholder = '/tmp/resolv.conf.d/resolv.conf.auto';
  		o.optional = true;
  
  
  		s.taboption('files', form.Flag, 'nohosts',
  			_('Ignore <code>/etc/hosts</code>')).optional = true;
  
  		s.taboption('files', form.DynamicList, 'addnhosts',
  			_('Additional Hosts files')).optional = true;
  
  		o = s.taboption('advanced', form.Flag, 'quietdhcp',
  			_('Suppress logging'),
  			_('Suppress logging of the routine operation of these protocols'));
  		o.optional = true;
  
  		o = s.taboption('advanced', form.Flag, 'sequential_ip',
  			_('Allocate IP sequentially'),
  			_('Allocate IP addresses sequentially, starting from the lowest available address'));
  		o.optional = true;
  
  		o = s.taboption('advanced', form.Flag, 'boguspriv',
  			_('Filter private'),
  			_('Do not forward reverse lookups for local networks'));
  		o.default = o.enabled;
  
  		s.taboption('advanced', form.Flag, 'filterwin2k',
  			_('Filter useless'),
  			_('Do not forward requests that cannot be answered by public name servers'));
  
  
  		s.taboption('advanced', form.Flag, 'localise_queries',
  			_('Localise queries'),
  			_('Localise hostname depending on the requesting subnet if multiple IPs are available'));
  
  		if (L.hasSystemFeature('dnsmasq', 'dnssec')) {
  			o = s.taboption('advanced', form.Flag, 'dnssec',
  				_('DNSSEC'));
  			o.optional = true;
  
  			o = s.taboption('advanced', form.Flag, 'dnsseccheckunsigned',
  				_('DNSSEC check unsigned'),
  				_('Requires upstream supports DNSSEC; verify unsigned domain responses really come from unsigned domains'));
  			o.default = o.enabled;
  			o.optional = true;
  		}
  
  		s.taboption('general', form.Value, 'local',
  			_('Local server'),
  			_('Local domain specification. Names matching this domain are never forwarded and are resolved from DHCP or hosts files only'));
  
  		s.taboption('general', form.Value, 'domain',
  			_('Local domain'),
  			_('Local domain suffix appended to DHCP names and hosts file entries'));
  
  		s.taboption('advanced', form.Flag, 'expandhosts',
  			_('Expand hosts'),
  			_('Add local domain suffix to names served from hosts files'));
  
  		s.taboption('advanced', form.Flag, 'nonegcache',
  			_('No negative cache'),
  			_('Do not cache negative replies, e.g. for not existing domains'));
  
  		s.taboption('advanced', form.Value, 'serversfile',
  			_('Additional servers file'),
  			_('This file may contain lines like \'server=/domain/1.2.3.4\' or \'server=1.2.3.4\' for domain-specific or full upstream <abbr title="Domain Name System">DNS</abbr> servers.'));
  
  		s.taboption('advanced', form.Flag, 'strictorder',
  			_('Strict order'),
  			_('<abbr title="Domain Name System">DNS</abbr> servers will be queried in the order of the resolvfile')).optional = true;
  
  		s.taboption('advanced', form.Flag, 'allservers',
  			_('All Servers'),
  			_('Query all available upstream <abbr title="Domain Name System">DNS</abbr> servers')).optional = true;
  
  		o = s.taboption('advanced', form.DynamicList, 'bogusnxdomain', _('Bogus NX Domain Override'),
  			_('List of hosts that supply bogus NX domain results'));
  
  		o.optional = true;
  		o.placeholder = '67.215.65.132';
  
  
  		s.taboption('general', form.Flag, 'logqueries',
  			_('Log queries'),
  			_('Write received DNS requests to syslog')).optional = true;
  
  		o = s.taboption('general', form.DynamicList, 'server', _('DNS forwardings'),
  			_('List of <abbr title="Domain Name System">DNS</abbr> servers to forward requests to'));
  
  		o.optional = true;
  		o.placeholder = '/example.org/10.1.2.3';
  		o.validate = validateServerSpec;
  
  
  		o = s.taboption('general', form.DynamicList, 'address', _('Addresses'),
  			_('List of domains to force to an IP address.'));
  		
  		o.optional = true;
  		o.placeholder = '/router.local/192.168.0.1';
  
  
  		o = s.taboption('general', form.Flag, 'rebind_protection',
  			_('Rebind protection'),
  			_('Discard upstream RFC1918 responses'));
  
  		o.rmempty = false;
  
  
  		o = s.taboption('general', form.Flag, 'rebind_localhost',
  			_('Allow localhost'),
  			_('Allow upstream responses in the 127.0.0.0/8 range, e.g. for RBL services'));
  
  		o.depends('rebind_protection', '1');
  
  
  		o = s.taboption('general', form.DynamicList, 'rebind_domain',
  			_('Domain whitelist'),
  			_('List of domains to allow RFC1918 responses for'));
  		o.optional = true;
  
  		o.depends('rebind_protection', '1');
  		o.placeholder = 'ihost.netflix.com';
  		o.validate = validateAddressList;
  
  
  		o = s.taboption('advanced', form.Value, 'port',
  			_('<abbr title="Domain Name System">DNS</abbr> server port'),
  			_('Listening port for inbound DNS queries'));
  
  		o.optional = true;
  		o.datatype = 'port';
  		o.placeholder = 53;
  
  
  		o = s.taboption('advanced', form.Value, 'queryport',
  			_('<abbr title="Domain Name System">DNS</abbr> query port'),
  			_('Fixed source port for outbound DNS queries'));
  
  		o.optional = true;
  		o.datatype = 'port';
  		o.placeholder = _('any');
  
  
  		o = s.taboption('advanced', form.Value, 'dhcpleasemax',
  			_('<abbr title="maximal">Max.</abbr> <abbr title="Dynamic Host Configuration Protocol">DHCP</abbr> leases'),
  			_('Maximum allowed number of active DHCP leases'));
  
  		o.optional = true;
  		o.datatype = 'uinteger';
  		o.placeholder = _('unlimited');
  
  
  		o = s.taboption('advanced', form.Value, 'ednspacket_max',
  			_('<abbr title="maximal">Max.</abbr> <abbr title="Extension Mechanisms for Domain Name System">EDNS0</abbr> packet size'),
  			_('Maximum allowed size of EDNS.0 UDP packets'));
  
  		o.optional = true;
  		o.datatype = 'uinteger';
  		o.placeholder = 1280;
  
  
  		o = s.taboption('advanced', form.Value, 'dnsforwardmax',
  			_('<abbr title="maximal">Max.</abbr> concurrent queries'),
  			_('Maximum allowed number of concurrent DNS queries'));
  
  		o.optional = true;
  		o.datatype = 'uinteger';
  		o.placeholder = 150;
  
  		o = s.taboption('advanced', form.Value, 'cachesize',
  			_('Size of DNS query cache'),
  			_('Number of cached DNS entries (max is 10000, 0 is no caching)'));
  		o.optional = true;
  		o.datatype = 'range(0,10000)';
  		o.placeholder = 150;
  
  		s.taboption('tftp', form.Flag, 'enable_tftp',
  			_('Enable TFTP server')).optional = true;
  
  		o = s.taboption('tftp', form.Value, 'tftp_root',
  			_('TFTP server root'),
  			_('Root directory for files served via TFTP'));
  
  		o.optional = true;
  		o.depends('enable_tftp', '1');
  		o.placeholder = '/';
  
  
  		o = s.taboption('tftp', form.Value, 'dhcp_boot',
  			_('Network boot image'),
  			_('Filename of the boot image advertised to clients'));
  
  		o.optional = true;
  		o.depends('enable_tftp', '1');
  		o.placeholder = 'pxelinux.0';
  
  		o = s.taboption('general', form.Flag, 'localservice',
  			_('Local Service Only'),
  			_('Limit DNS service to subnets interfaces on which we are serving DNS.'));
  		o.optional = false;
  		o.rmempty = false;
  
  		o = s.taboption('general', form.Flag, 'nonwildcard',
  			_('Non-wildcard'),
  			_('Bind dynamically to interfaces rather than wildcard address (recommended as linux default)'));
  		o.default = o.enabled;
  		o.optional = false;
  		o.rmempty = true;
  
  		o = s.taboption('general', form.DynamicList, 'interface',
  			_('Listen Interfaces'),
  			_('Limit listening to these interfaces, and loopback.'));
  		o.optional = true;
  
  		o = s.taboption('general', form.DynamicList, 'notinterface',
  			_('Exclude interfaces'),
  			_('Prevent listening on these interfaces.'));
  		o.optional = true;
  
  		o = s.taboption('leases', form.SectionValue, '__leases__', form.GridSection, 'host', null,
  			_('Static leases are used to assign fixed IP addresses and symbolic hostnames to DHCP clients. They are also required for non-dynamic interface configurations where only hosts with a corresponding lease are served.') + '<br />' +
  			_('Use the <em>Add</em> Button to add a new lease entry. The <em>MAC-Address</em> identifies the host, the <em>IPv4-Address</em> specifies the fixed address to use, and the <em>Hostname</em> is assigned as a symbolic name to the requesting host. The optional <em>Lease time</em> can be used to set non-standard host-specific lease time, e.g. 12h, 3d or infinite.'));
  
  		ss = o.subsection;
  
  		ss.addremove = true;
  		ss.anonymous = true;
  
  		so = ss.option(form.Value, 'name', _('Hostname'));
  		so.validate = validateHostname;
  		so.rmempty  = true;
  		so.write = function(section, value) {
  			uci.set('dhcp', section, 'name', value);
  			uci.set('dhcp', section, 'dns', '1');
  		};
  		so.remove = function(section) {
  			uci.unset('dhcp', section, 'name');
  			uci.unset('dhcp', section, 'dns');
  		};
  
  		so = ss.option(form.Value, 'mac', _('<abbr title="Media Access Control">MAC</abbr>-Address'));
  		so.datatype = 'list(unique(macaddr))';
  		so.rmempty  = true;
  		so.cfgvalue = function(section) {
  			var macs = L.toArray(uci.get('dhcp', section, 'mac')),
  			    result = [];
  
  			for (var i = 0, mac; (mac = macs[i]) != null; i++)
  				if (/^([0-9a-fA-F]{1,2}):([0-9a-fA-F]{1,2}):([0-9a-fA-F]{1,2}):([0-9a-fA-F]{1,2}):([0-9a-fA-F]{1,2}):([0-9a-fA-F]{1,2})$/.test(mac))
  					result.push('%02X:%02X:%02X:%02X:%02X:%02X'.format(
  						parseInt(RegExp.$1, 16), parseInt(RegExp.$2, 16),
  						parseInt(RegExp.$3, 16), parseInt(RegExp.$4, 16),
  						parseInt(RegExp.$5, 16), parseInt(RegExp.$6, 16)));
  
  			return result.length ? result.join(' ') : null;
  		};
  		so.renderWidget = function(section_id, option_index, cfgvalue) {
  			var node = form.Value.prototype.renderWidget.apply(this, [section_id, option_index, cfgvalue]),
  			    ipopt = this.section.children.filter(function(o) { return o.option == 'ip' })[0];
  
  			node.addEventListener('cbi-dropdown-change', L.bind(function(ipopt, section_id, ev) {
  				var mac = ev.detail.value.value;
  				if (mac == null || mac == '' || !hosts[mac] || !hosts[mac].ipv4)
  					return;
  
  				var ip = ipopt.formvalue(section_id);
  				if (ip != null && ip != '')
  					return;
  
  				var node = ipopt.map.findElement('id', ipopt.cbid(section_id));
  				if (node)
  					dom.callClassMethod(node, 'setValue', hosts[mac].ipv4);
  			}, this, ipopt, section_id));
  
  			return node;
  		};
  		Object.keys(hosts).forEach(function(mac) {
  			var hint = hosts[mac].name || hosts[mac].ipv4;
  			so.value(mac, hint ? '%s (%s)'.format(mac, hint) : mac);
  		});
  
  		so = ss.option(form.Value, 'ip', _('<abbr title="Internet Protocol Version 4">IPv4</abbr>-Address'));
  		so.datatype = 'or(ip4addr,"ignore")';
  		so.validate = function(section, value) {
  			var mac = this.map.lookupOption('mac', section),
  			    name = this.map.lookupOption('name', section),
  			    m = mac ? mac[0].formvalue(section) : null,
  			    n = name ? name[0].formvalue(section) : null;
  
  			if ((m == null || m == '') && (n == null || n == ''))
  				return _('One of hostname or mac address must be specified!');
  
  			return true;
  		};
  		Object.keys(hosts).forEach(function(mac) {
  			if (hosts[mac].ipv4) {
  				var hint = hosts[mac].name;
  				so.value(hosts[mac].ipv4, hint ? '%s (%s)'.format(hosts[mac].ipv4, hint) : hosts[mac].ipv4);
  			}
  		});
  
  		so = ss.option(form.Value, 'leasetime', _('Lease time'));
  		so.rmempty = true;
  
  		so = ss.option(form.Value, 'duid', _('<abbr title="The DHCP Unique Identifier">DUID</abbr>'));
  		so.datatype = 'and(rangelength(20,36),hexstring)';
  		Object.keys(duids).forEach(function(duid) {
  			so.value(duid.split(':').join(''), '%s (%s)'.format(duid, duids[duid].hostname || duids[duid].macaddr || duids[duid].ip6addr || '?'));
  		});
  
  		so = ss.option(form.Value, 'hostid', _('<abbr title="Internet Protocol Version 6">IPv6</abbr>-Suffix (hex)'));
  
  		o = s.taboption('leases', CBILeaseStatus, '__status__');
  
  		if (has_dhcpv6)
  			o = s.taboption('leases', CBILease6Status, '__status6__');
  
  		return m.render().then(function(mapEl) {
  			poll.add(function() {
  				return callDHCPLeases().then(function(leaseinfo) {
  					var leases = Array.isArray(leaseinfo.dhcp_leases) ? leaseinfo.dhcp_leases : [],
  					    leases6 = Array.isArray(leaseinfo.dhcp6_leases) ? leaseinfo.dhcp6_leases : [];
  
  					cbi_update_table(mapEl.querySelector('#lease_status_table'),
  						leases.map(function(lease) {
  							var exp;
  
  							if (lease.expires === false)
  								exp = E('em', _('unlimited'));
  							else if (lease.expires <= 0)
  								exp = E('em', _('expired'));
  							else
  								exp = '%t'.format(lease.expires);
  
  							return [
  								lease.hostname || '?',
  								lease.ipaddr,
  								lease.macaddr,
  								exp
  							];
  						}),
  						E('em', _('There are no active leases')));
  
  					if (has_dhcpv6) {
  						cbi_update_table(mapEl.querySelector('#lease6_status_table'),
  							leases6.map(function(lease) {
  								var exp;
  
  								if (lease.expires === false)
  									exp = E('em', _('unlimited'));
  								else if (lease.expires <= 0)
  									exp = E('em', _('expired'));
  								else
  									exp = '%t'.format(lease.expires);
  
  								var hint = lease.macaddr ? hosts[lease.macaddr] : null,
  								    name = hint ? (hint.name || hint.ipv4 || hint.ipv6) : null,
  								    host = null;
  
  								if (name && lease.hostname && lease.hostname != name && lease.ip6addr != name)
  									host = '%s (%s)'.format(lease.hostname, name);
  								else if (lease.hostname)
  									host = lease.hostname;
  								else if (name)
  									host = name;
  
  								return [
  									host || '-',
  									lease.ip6addrs ? lease.ip6addrs.join(' ') : lease.ip6addr,
  									lease.duid,
  									exp
  								];
  							}),
  							E('em', _('There are no active leases')));
  					}
  				});
  			});
  
  			return mapEl;
  		});
  	}
  });
  