#compdef cryptsetup

local curcontext="$curcontext" ign ret=1
local -a actions state line expl

(( $#words > 2 )) && ign='!'
_arguments -s \
  '(-v --verbose)'{-v,--verbose}'[enable verbose mode]' \
  '--debug[enable debug mode]' \
  '(-c --cipher)'{-c+,--cipher=}'[set cipher]:cipher specification' \
  '(-h --hash)'{-h+,--hash=}'[hash algorithm]:hash algorithm' \
  '(-y --verify-passphrase)'{-y,--verify-passphrase}'[query for password twice]' \
  '(-d --key-file)'{-d+,--key-file=}'[set keyfile]:key file:_files' \
  '--master-key-file=[set master key]:key file:_files' \
  '--dump-master-key[dump luks master key]' \
  '(-s --key-size)'{-s+,--key-size=}'[set key size]:size (bits)' \
  '(-l --keyfile-size)'{-l+,--keyfile-size=}'[set keyfile size]:size (bytes)' \
  '--keyfile-offset=[specify number of bytes to skip in keyfile]:offset (bytes)' \
  '--new-keyfile-size=[set new keyfile size (luksAddKey)]:size (bytes)' \
  '--new-keyfile-offset=[specify number of bytes to skip in newly added keyfile]:offset (bytes)' \
  '(-S --key-slot)'{-S+,--key-slot=}'[select key slot]:key slot' \
  '(-b --size)'{-b+,--size=}'[force device size]:sectors' \
  '(-o --offset)'{-o+,--offset=}'[set start offset]:sectors' \
  '(-p --skip)'{-p+,--skip=}'[data to skip at beginning]:sectors' \
  '(-r --readonly)'{-r,--readonly}'[create a read-only mapping]' \
  '(-i --iter-time)'{-i+,--iter-time=}'[set password processing duration]:duration (milliseconds)' \
  '(-q --batch-mode)'{-q,--batch-mode}"[don't ask for confirmation]" \
  '(-t --timeout)'{-t+,--timeout=}'[set password prompt timeout]:timeout (seconds)' \
  '--progress-frequency=[specify progress line update interval]:interval (seconds)' \
  '(-T --tries)'{-T+,--tries=}'[set maximum number of retries]:number of retries' \
  '--align-payload=[set payload alignment]:sectors' \
  '--header-backup-file=[specify file with LUKS header and keyslots backup]:file:_files' \
  '(--use-urandom)--use-random[use /dev/random to generate volume key]' \
  '(--use-random)--use-urandom[use /dev/urandom to generate volume key]' \
  '--shared[share device with another non-overlapping crypt segment]' \
  '--uuid=[set device UUID]:uuid' \
  '--allow-discards[allow discard (aka TRIM) requests for device]' \
  '--header=[device or file with separated LUKS header]:file:_files' \
  '--test-passphrase[do not activate device, just check passphrase]' \
  '--tcrypt-hidden[use hidden header (hidden TCRYPT device)]' \
  '--tcrypt-system[device is system TCRYPT drive (with bootloader)]' \
  '--tcrypt-backup[use backup (secondary) TCRYPT header]' \
  '--veracrypt[scan also for VeraCrypt compatible device]' \
  '--veracrypt-pim=[specify personal iteration multiplier for VeraCrypt compatible device]:multiplier' \
  '--veracrypt-query-pim[query personal iteration multiplier for VeraCrypt compatible device]' \
  '(-M --type)'{-M+,--type=}'[specify type of device metadata]:type:(luks plain loopaes tcrypt)' \
  '--force-password[disable password quality check (if enabled)]' \
  '--perf-same_cpu_crypt[use dm-crypt same_cpu_crypt performance compatibility option]' \
  '--perf-submit_from_crypt_cpus[use dm-crypt submit_from_crypt_cpus performance compatibility option]' \
  '--deferred[device removal is deferred until the last user closes it]' \
  '--pbkdf=[specify PBKDF algorithm for LUKS2]:algorithm:(argon2i argon2id pbkdf2)' \
  '--pbkdf-memory=[specify PBKDF memory cost limit]:limit (kilobytes)' \
  '--pbkdf-parallel=[specify PBKDF parallel cost]:threads' \
  '--pbkdf-force-iterations=[specify PBKDF iterations cost]:cost' \
  '--priority=[specify keyslot priority]:priority:(ignore normal prefer)' \
  '--disable-locks[disable locking of on-disk metadata]' \
  '--disable-keyring[disable loading volume keys via kernel keyring]' \
  '(-I --integrity)'{-I+,--integrity=}'[specify data integrity algorithm (LUKS2 only)]:algorithm' \
  '--integrity-no-journal[disable journal for integrity device]' \
  "--integrity-no-wipe[don't wipe device after format]" \
  "--token-only[don't ask for passphrase if activation by token fails]" \
  '--token-id=[specify token number]:number [any]' \
  '--key-description=[specify key description]:description' \
  '--sector-size=[specify encryption sector size]:size [512 bytes]' \
  '--persistent[set activation flags persistent for device]' \
  '--label=[set label for the LUKS2 device]:label' \
  '--subsystem=[set subsystem label for the LUKS2 device]:subsystem' \
  '--unbound[create unbound (no assigned data segment) LUKS2 keyslot]' \
  '--json-file=[read or write token to json file]:json file:_files -g "*.json(-.)"' \
  "${ign}(- : *)--version[show version information]" \
  "${ign}(- : *)"{-\?,--help}'[display help information]' \
  "${ign}(- : *)--usage[display brief usage]" \
  ':action:->actions' \
  '*::arguments:->action-arguments' && ret=0

case $state in
  actions)
    actions=(
      'open:open device with named mapping'
      'close:close device (remove mapping)'
      'status:report mapping status'
      'resize:resize an active mapping'
      'benchmark:benchmark cipher'
      'repair:try to repair on-disk metadata'
      'erase:erase all keyslots'
      'convert:convert LUKS from/to LUKS2 format'
      'config:set permanent configuration options for LUKS2'
      'luksFormat:initialize a LUKS partition'
      'luksAddKey:add a new key'
      'luksRemoveKey:remove a key'
      'luksChangeKey:change a key'
      'luksConvertKey:convert a key to new pbkdf parameters'
      'luksKillSlot:wipe key from slot'
      'luksUUID:print/change device UUID'
      'isLuks:check if device is a LUKS partition'
      'luksDump:dump header information'
      'tcryptDump:dump TCRYPT device information'
      'luksSuspend:suspend LUKS device and wipe key'
      'luksResume:resume suspended LUKS device'
      'luksHeaderBackup:store binary backup of headers'
      'luksHeaderRestore:restore header backup'
      'token:manipulate auto-activation token of the device'
    )
    _describe action actions && ret=0
  ;;
  action-arguments)
    local -a args
    local mapping=':mapping:_path_files -W /dev/mapper'
    local device=':device:_files'
    case ${words[1]} in
      create) args=( $mapping $device '--type=:type' );;
      open) args=( $device $mapping '--type=:type' );;
      (plain|luks|loopaes|tcrypt)Open) args=( $device $mapping '--type=:type' );;
      benchmark) args=( '--cipher=:cipher' );;
      luksKillSlot) args=( $device ':key slot number' );;
      remove|status|resize|*lose|luksSuspend|luksResume) args=( $mapping );;
      erase|convert|config|repair|(luks(AddKey|Erase|RemoveKey|DelKey|UUID|Dump)|isLuks))
	args=( $device )
      ;;
      luks(Format|AddKey|RemoveKey|ChangeKey|ConvertKey))
	args=( $device ':key file:_files' )
      ;;
      luksHeader*) args=( $device '--header-backup-file:file:_files' );;
      token)
	args=(
	  ':action:((
	    add\:create\ a\ new\ keyring
	    remove\:remove\ any\ token\ from\ slot
	    import\:store\ arbitrary\ valid\ token\ json\ in\ LUKS2\ header
	    export\:write\ requested\ token\ json\ to\ a\ file
	  ))'
	  $device
	)
      ;;
      *)
        _default && ret=0
      ;;
    esac
    _arguments $args && ret=0
  ;;
esac

return ret
