#compdef ipset

local offset=0
local -a args from_to hash cmds listopts

_set_types () {
	_values -S \  "Set type" \
		'bitmap\:ip[uses a memory range to store IPv4 host (default) or IPv4 subnet addresses up to 65536 elements]'\
		'bitmap\:ip,mac[uses a memory range to store an IPv4 host/subnet and mac address pair up to 65536 elements]'\
		'bitmap\:port[uses a memory range to store port numbers independent of L4 protocol at up to 65536 elements]'\
		'hash\:ip[stores IPv4/IPv6 host/subnet addresses. 0.0.0.0 and :: cannot be stored]'\
		'hash\:net[stores varying sizes of IPv4/IPv6 addresses. 0.0.0.0 and :: cannot be stored]'\
		'hash\:ip,port[stores IPv4/IPv6 addresses and port numbers, including L4 proto - port 0 cannot be stored]'\
		'hash\:net,port[stores varying sizes of IPv4/IPv6 addresses and port numbers, including L4 proto]'\
		'hash\:ip,port,ip[stores IPv4/IPv6 addresses, a port with L4 proto and another IPv4/IPv6 address]'\
		'hash\:ip,port,net[stores an IPv4/IPv6 address, port with L4 proto and an arbitrary size IPv4/IPv6 subnet]'\
		'hash\:net,iface[stores an IPv4/IPv6 address and an interface name]'\
		'list\:set[a simple list which stores names of other sets]'
}

#if [[ $words[2] = (-q|--quiet) ]]; then
#	offset=1
#fi

_ipsets () {
	local -a vals
	vals=( ${${(M)${(f)"$(_call_program ipsets ipset -L)"}%Name: *}#Name: } )
	_describe -t ipsets "IP sets" vals
}
_sets () {
	_ipsets
	local -a vals
}

from_to=('(--network)--from[from IP or network (with --netmask)]:IP'
	'(--network)--to[to IP or network (with --netmask)]:IP'
	'(--from --to)--network[network]:IP/mask'
)

_addressfamily () {
	vals=(  inet
	 	inet6
	     )
	_describe -t addressfamily "Address Family" vals
}

hash=(	'--hashsize[the initial hash size aligned to a power of 2(default 1024)]:hashsize'
	'--maxelem[the maximum number of elements in the set (default 65536)]:maxelements'
	'--family[the protocol family of addresses to be stored in the set (default inet)]:addressfamily:_addressfamily'
	'--timeout[adds timeout support to the set with your specified value as default, (0 = forever)]:entrytimeout'
	'--probes[max number of tries to resolve clashing, altering this is discouraged (default 8)]:probes'
	'--resize[ratio of increasing hash size after unsuccessful <probes> of double-hashing, altering discouraged]:percent'
)

case $words[offset+2]; in
  -N|--create)
	case $words[offset+4]; in
	  bitmap\:ip)
	  	args=(  $from_to
			'--netmask[store network addresses instead of IP addresses]:CIDR'
		)
	  ;;
	  bitmap\:ip,mac)
	  	args=(  $from_to
			'--netmask[store network addresses instead of IP addresses]:CIDR'
		)
	  ;;
	  bitmap\:port)
	  	args=(	'--from[from port]:port:_ports'
			'--to[to port]:port:_ports'
		)
	  ;;
	  hash\:ip)
	  	args=(  $hash
			'--netmask[store network addresses instead of IP addresses]:CIDR'
		)
	  ;;
	  hash\:net)
	  	args=(	$hash  )
	  ;;
	  hash\:ip,port)
	  	args=(	$hash
			'--netmask[store network addresses instead of IP addresses]:CIDR'
		)
	  ;;
	  hash\:net,port)
	  	args=(	$hash  )
	  ;;
	  hash\:ip,port,ip)
	  	args=(	$hash
			'--netmask[store network addresses instead of IP addresses]:CIDR'
		)
	  ;;
	  hash\:ip,port,net)
	  	args=(	$hash
			'--netmask[store network addresses instead of IP addresses]:CIDR'
		)
	  ;;
	  hash\:net,iface)
	  	args=(	$hash  )
	  ;;
	  list\:set)
	  	args=(	'--size[size of the new setlist (default 8)]:size'  )
	  ;;
	esac
  ;;
esac

_ips () {
	if [[ $CURRENT -eq ((offset+4)) ]]; then
		local ips=1 default
		local -a vals vals1 vals2 bindings
		vals=( ${${${(f)"$(_call_program ipsets ipset -L $words[offset+3])"}[4,-1]}//\:/\\:} )
		for i in $vals; do
			if [[ $i = Default\ binding\\:* ]]; then default=${i#Default binding\\: }; continue; fi
			if [[ $i = (Header\\:*|Members\\:*|Size in memory\\:*|References\\:*) ]]; then continue; fi
			if [[ $i = 'Bindings\:' ]]; then ips=0; continue; fi
			if (( $ips )); then vals1+=$i; else bindings+=${i/ ->/:}; fi
		done
		_describe -t ips "IPs from $words[offset+3] set" vals1
		_describe -t special_values "special values" vals2
	fi
}

cmds=(-N -X -F -E -W -S -R -A -D -T -B -U -H --create --destroy --flush --rename --swap --save --restore --add --del --test --help)
listopts=(-n --name -s --sorted -t --terse -r --resolve -L --list)
addopts=(--timeout --timeout -! --exist -A --add)

_arguments \
	"($cmds $listopts $addopts)"{-N,--create}'[create a set]:set name::::_set_types' \
	"($cmds $listopts)"{-X,--destroy}'[destroy specified set (or all if none specified)]:set name:_sets' \
	"($cmds $listopts)"{-F,--flush}'[flush specified set (or all if none specified)]:set name:_sets' \
	"($cmds $listopts)"{-E,--rename}'[rename set]:current set name:_ipsets:new set name:' \
	"($cmds $listopts)"{-W,--swap}'[swap two sets]:::_ipsets:::_ipsets' \
	"($cmds -L --list -q --quiet )"{-L,--list}'[list the entries and bindings for the specified set (or all if none specified)]:::_sets' \
	"($cmds $listopts)"{-S,--save}'[save the given set (or all if none specified)]:::_sets' \
	"($cmds $listopts)"{-R,--restore}'[restore a saved session generated by --save from stdin]' \
	"($cmds $listopts)"{-A,--add}'[add an IP to a set]:::_ipsets:IP' \
	"($cmds $listopts)"{-D,--del}'[delete an IP from a set]:::_ipsets:::_ips' \
	"($cmds $listopts)"{-T,--test}'[test whether an IP is in a set]:::_ipsets:::_ips' \
	"($cmds $listopts)"{-H,--help}'[print help and settype specific help if settype specified]:::_set_types' \
	"(-q --quiet $listopts)"{-q,--quiet}'[suppress any output to stdout and stderr]' \
	"(-t --terse $listopts)"{-t,--terse}'[list set names and headers without entries]' \
	"(-r --resolve $listopts)"{-r,--resolve}'[enforce DNS name lookup of addresses, slow!]' \
	"(-! --exist $addopts)"{-!,--exist}'[ignore errors when creating an identical set, adding existing entry or deleting a non-existent one]'\
	"(--timeout --timeout $addopts)"{--timeout,--timeout}'[set the timeout for this entry. set must have been created with timeout support]:timeout'\
	"($cmds -s --sorted  -q --quiet)"{-s,--sorted}'[sorted output]' \
	"($cmds -n --name -q --quiet)"{-n,--name}"[name output only; suppresses showing of set information]" \
	"$args[@]"
