#compdef zpool
# Synced with the S11U1 man page

_zpool() {
	local context state line expl
	local -a subcmds fields ro_props rw_props versions create_properties_dataset

	subcmds=(
		create destroy add remove list iostat status online
		offline clear attach detach replace scrub import export
		upgrade history get set split help
	)

	versions=(
		${${${(M)"${(f)$(zpool upgrade -v)}":#[[:space:]]#<->*}##[[:space:]]}%%[[:space:]]*}
	)

	ro_props=(
		"all[All properties]"
		"allocated[Space allocated]"
		"capacity[Space used (percentage)]"
		"dedupratio[Deduplication ratio]"
		"free[Space unallocated]"
		"guid[Unique identifier]"
		"health[Health status]"
		"size[Total size]"
	)

	rw_props=(
		"altroot[Alternate root directory]:value:"
		"autoexpand[Automatic pool expansion]:value:(on off)"
		"autoreplace[Automatic device replacement]:value:(on off)"
		"bootfs[Default bootable dataset]:value:"
		"cachefile[Pool configuration cache file location]:value:"
		"dedupditto[Threshold for number of copies]:value:"
		"delegation[Delegated administration]:value:(on off)"
		"failmode[Failure-mode behavior]:value:(wait continue panic)"
		"listshares[Show shares in 'zfs list']:value:(on off)"
		"listsnaps[Show snapshots in 'zfs list']:value:(on off)"
		"readonly[Controls whether the pool can be modified]:value:(on off)"
		"version[Pool version]:version:($versions)"
	)

	fields=( ${ro_props%%:*} ${rw_props%%:*} )

	create_properties_dataset=(
		"aclinherit:value:(discard noallow restricted passthrough passthrough-x)"
		"aclmode:value:(discard mask passthrough)"
		"atime:value:(on off)"
		"canmount:value:(on off noauto)"
		"checksum:value:(on off fletcher2 fletcher4 sha256 sha256+mac)"
		"compression:value:(on off lzjb gzip gzip-{1..9} zle)"
		"copies:value:(1 2 3)"
		"dedup:value:(on off verify sha256 sha256,verify)"
		"devices:value:(on off)"
		"encryption:value:(off on aes128-ccm aes-192-ccm aes-256-ccm aes-128-gcm aes-192-gcm aes-256-gcm)"
		"exec:value:(on off)"
		"groupquota@:value:" # TODO: complete group=size|none
		"keysource:value:_zfs_keysource_props"
		"logbias:value:(latency throughput)"
		"mlslabel:value:(none)" # TODO: list sensitivity labels
		"mountpoint:path, 'legacy', or 'none':{if [[ -prefix /* ]]; then _path_files -/; else _wanted mountpoints expl 'mountpoint (type \"/\" to start completing paths)' compadd legacy none; fi}"
		"nbmand:value:(on off)"
		"primarycache:value:(all none metadata)"
		"quota:number or 'none':{if [[ -prefix [0-9]## ]]; then _message -e 'number'; elif [[ $PREFIX == quota= ]]; then _wanted none expl 'number or none' compadd none; else _wanted none expl 'quota' compadd none; fi}"
		"readonly:value:(on off)"
		"recordsize:value:(512 1K 2K 4K 8K 16K 32K 64K 128K 256K 512K 1M)"
		"refquota:number or 'none':{if [[ -prefix [0-9]## ]]; then _message -e 'number'; elif [[ $PREFIX == refquota= ]]; then _wanted none expl 'number or none' compadd none; else _wanted none expl 'refquota' compadd none; fi}"
		"refreservation:number or 'none':{if [[ -prefix [0-9]## ]]; then _message -e 'number'; elif [[ $PREFIX == refreservation= ]]; then _wanted none expl 'number or none' compadd none; else _wanted none expl 'refreservation' compadd none; fi}"
		"reservation:value:{if [[ -prefix [0-9]## ]]; then _message -e 'number'; elif [[ $PREFIX == reservation= ]]; then _wanted none expl 'number or none' compadd none; else _wanted none expl 'reservation' compadd none; fi}"
		"rstchown:value:(on off)"
		"secondarycache:value:(all none metadata)"
		"setuid:value:(on off)"
		"shadow:value:" # TODO: complete URI|none
		"share:share properties:"
		"sharenfs:value:(on off)"
		"sharesmb:value:(on off)"
		"snapdir:value:(hidden visible)"
		"sync:value:(standard always disabled)"
		"userquota@:value:" # TODO: complete user=size|none
		"version:value:(1 2 3 4 current)"
		"volsize:value:" # <size>
		"vscan:value:(on off)"
		"xattr:value:(on off)"
		"zoned:value:(on off)"
	)

	if [[ $service == "zpool" ]]; then
		_arguments -C -A "-*" \
			'-\?[Help]' \
			'*::command:->subcmd' && return 0

		if (( CURRENT == 1 )); then
			_wanted commands expl "zpool subcommand" compadd -a subcmds
			return
		fi
		service="$words[1]"
		curcontext="${curcontext%:*}=$service:"
	fi

	case $service in
	(help)
		_arguments -A "-*" \
			- set1 \
			':command/property:($subcmds ${fields%%\[*} properties)' \
			- set2 \
			'-l[Display property information]' \
			': :(properties)'
		;;

	(clear)
		_arguments -A "-*" \
			'-F[Discard transactions to allow pool opening]' \
			'-f[Ignore fmadm acquit and fmadm repair failures]' \
			'-n[With -F, check if discarding transactions would work]' \
			':pool name:_zfs_pool' \
			'*:virtual device:_files'
		;;

	(create)
		# TODO: investigate better vdev handling
		_arguments -A "-*" \
			'-B[Create EFI boot partition on whole disks]' \
			'-o[Set pool property at creation time]:property:_values -s , "property" $rw_props' \
			'-O[Set dataset property at creation time]:property:_values -s , "property" $create_properties_dataset' \
			'-f[Force use of in-use devices]' \
			'-l[Display configuration in /dev/chassis location form]' \
			'-n[Display configuration without creating pool]' \
			'-R[Use alternate root]:alternate root:_files -/' \
			'-m[Set mountpoint for root dataset]:mountpoint:' \
			':pool name:' \
			'*:virtual device:_files'
		;;

	(destroy)
		_arguments -A "-*" \
			'-f[Force active datasets to be unmounted]' \
			':pool name:_zfs_pool'
		;;

	(add)
		_arguments -A "-*" \
			'-f[Force use of in-use devices]' \
			'-l[Display configuration in /dev/chassis location form]' \
			'-n[Display configuration without modifying pool]' \
			':pool name:_zfs_pool' \
			'*:virtual device:_files'
		;;

	(list)
		_arguments \
			'-H[Scripted mode]' \
			'-T[timestamp]:value:(u d)' \
			'-o[Fields to list]:field:_values -s , "field" $fields' \
			'::pool name:_zfs_pool'
		;;

	(iostat)
		_arguments -A "-*" \
			'-l[Display configuration in /dev/chassis location form]' \
			'-T[timestamp]:value:(u d)' \
			'-v[Verbose statistics]' \
			'*::pool name:_zfs_pool' \
			'::interval:' \
			'::count:'
		;;

	(status)
		_arguments -A "-*" \
			'-l[Display configuration in /dev/chassis location form]' \
			'-v[Verbose information]' \
			'-x[Show only unhealthy pools]' \
			'-T[timestamp]:value:(u d)' \
			'*::pool name:_zfs_pool'
		;;

	(offline)
		_arguments -A "-*" \
			'-t[Offline until next reboot]' \
			':pool name:_zfs_pool' \
			'*:virtual device:_files'
		;;

	(online)
		_arguments \
			'-e[Expand device to use all available space]' \
			':pool name:_zfs_pool' \
			'*:virtual device:_files'
		;;

	(attach)
		# TODO: first device should choose first from existing.
		_arguments \
			'-f[Force attach, even if in use]' \
			':pool name:_zfs_pool' \
			':virtual device:_files' \
			':virtual device:_files'
		;;

	(detach)
		_arguments \
			':pool name:_zfs_pool' \
			':virtual device:_files'
		;;

	(replace)
		_arguments -A "-*" \
			'-f[Force attach, even if in use]' \
			':pool name:_zfs_pool' \
			':virtual device:_files' \
			'::virtual device:_files'
		;;

	(scrub)
		_arguments -A "-*" \
			'-s[Stop scrubbing]' \
			'*:pool name:_zfs_pool'
		;;

	(export)
		_arguments -A "-*" \
			'-f[Forcefully unmount all datasets]' \
			'*:pool name:_zfs_pool'
		;;

	(import)
		# TODO: -o should complete mount options, too
		_arguments -A "-*" \
			'-D[Destroyed pools]' \
			'(-d)*-c[Use cache file]:cache file:_files' \
			'(-c,-D)*-d[Search for devices or files in directory]:directory:_files -/' \
			'-F[Recovery mode: discard transactions if required]' \
			'-f[Force import]' \
			'-l[Display configuration in /dev/chassis location form]' \
			'-m[Ignore missing log devices]' \
			'-N[Import pool without mounting any filesystems]' \
			'-n[With -F; do not perform input]' \
			'-R[Alternate root]:alternate root:_files -/' \
			'-o[Set pool or dataset property]:property:_values -s , "property" $create_properties_dataset $rw_props' \
			- set1 \
			'*:pool name or id:_zfs_pool' \
			'::new pool name:' \
			- set2 \
			'-N[Do not mount any filesystems]' \
			'-a[All pools]'
		;;

	(get)
		_arguments -A "-*" \
			':property:_values -s , "property" $fields' \
			'*:pool name:_zfs_pool'
		;;

	(set)
		_arguments -A "-*" \
			':property:_values -s , "property" $rw_props' \
			'*:pool name:_zfs_pool'
		;;

	(split)
		_arguments -A "-*" \
			'-R[Alternate root]:alternate root:_files -/' \
			'-l[Display configuration in /dev/chassis location form]' \
			'-n[Display configuration without splitting]' \
			'-o[Set pool or dataset property]:property:_values -s , "property" $create_properties_dataset $rw_props' \
			':pool name or id:_zfs_pool' \
			':new pool name:' \
			'*::virtual device:_files -/'
		;;

	(upgrade)
		_arguments -A "-*" \
			- set1 \
			'-v[Display ZFS versions and descriptions]' \
			- set2 \
			"-V[Upgrade to given version]:version:($versions)" \
			'-a[Upgrade all pools]' \
			'*:pool name:_zfs_pool'
		;;

	(history)
		_arguments -A "-*" \
			'-i[Display internal events]' \
			'-l[Long format]' \
			'*:pool name:_zfs_pool'
		;;

	(*)
		_message "unknown zpool subcommand: $service"
		;;
	esac
}

_zpool "$@"
