#compdef borg borgfs -P -value-,BORG_*,-default-

# Zsh completion for Borg Backup 1.2.0a9 (2020-09-27).
#
# Recommended _borg specific settings:
#
#   zstyle -e ':completion:*:*:borg-*:argument-rest:*' tag-order \
#     '[[ $words[CURRENT] == -* ]] && reply=( "! archives archive-files" "-" )'
#   zstyle ':completion:*:*:(borg|-value-,BORG_)*' sort false
#   zstyle ':completion:*:*:borg-config:argument-2:keys' list-grouped false
#   zstyle ':completion:*:*:borg-*:*' gain-privileges true
#   zstyle ':completion:*' fake-parameters 'BORG_REPO:scalar'
#
# Custom styles:
#
# archive-description-format
#   Default: `{archive:<36} {time} [{id}]`.
# archive-sort
#   In which order archive names should be listed.
#   Possible values are: `inverse`, `timestamp`, `name`, `id`.
# file-description-format
#   Default: `{mode} {user:6} {group:6} {size:8d} {mtime} {path}{extra}`.
# path-style-selector
#   Style selector used to select a path (when Borg would use either `pp` or `pf`).
#   Default: `fm`.
# repository-suffix
#   This boolean style controls whether to add the `::` auto-removable suffix to a repository.
#   Default: `true`.

(( $+functions[_borg_commands] )) ||
_borg_commands() {
  local -a commands_=(
    'benchmark:benchmark command'
    'break-lock:break the repository lock'
    'check:check repository consistency'
    'compact:compact segment files in the repository'
    'config:get, set, and delete values in a repository or cache config file'
    'create:create new archive'
    'debug:debugging command (not intended for normal use)'
    'delete:delete an existing repository or archives'
    'diff:diff contents of two archives'
    'export-tar:export archive contents as a tarball'
    'extract:extract archive contents'
    'help:extra help'
    'info:show repository or archive information'
    'init:initialize an empty repository'
    'key:manage repository key'
    'list:list archive or repository contents'
    'mount:mount archive or an entire repository as a FUSE filesystem'
    'prune:prune repository archives according to specified rules'
    'recreate:re-create archives'
    'rename:rename an existing archive'
    'serve:start in server mode'
    'umount:un-mount the FUSE filesystem'
    'upgrade:upgrade a repository from a previous version'
    'with-lock:run a user specified command with the repository lock held'
  )
  _describe -t commands 'borg commands' commands_
}

(( $+functions[_borg-benchmark] )) ||
_borg-benchmark() {
  local -a common_options
  __borg_setup_common_options

  _arguments -s -w -S : \
    $common_options \
    ':type:(crud)' \
    ': :_borg_repository' \
    ':PATH:_files'
}

(( $+functions[_borg-break-lock] )) ||
_borg-break-lock() {
  local -a common_options
  __borg_setup_common_options

  _arguments -s -w -S : \
    $common_options \
    ':: :_borg_repository'
}

(( $+functions[_borg-check] )) ||
_borg-check() {
  local -a common_options common_archive_filters_options
  __borg_setup_common_options
  __borg_setup_common_archive_filters_options

  _arguments -s -w -S : \
    '--repository-only[only perform repository checks]' \
    '--archives-only[only perform archives checks]' \
    '(--repository-only)--verify-data[perform cryptographic archive data integrity verification]' \
    '--repair[attempt to repair any inconsistencies found]' \
    '--save-space[work slower, but using less space]' \
    '--max-duration=[partial repo check for max. SECONDS]: : _borg_guard_unsigned_number "SECONDS"' \
    $common_archive_filters_options \
    $common_options \
    '::REPOSITORY_OR_ARCHIVE: _borg_repository_or_archive'
}

(( $+functions[_borg-compact] )) ||
_borg-compact() {
  local -a common_options
  __borg_setup_common_options

  _arguments -s -w -S : \
    $common_options \
     '--cleanup-commits[cleanup commit-only 17-byte segment files]' \
     '--threshold=[set minimum threshold for saved space in PERCENT (default: 10)]: : _borg_guard_unsigned_number "PERCENT (default\: 10)"' \
    ':: :_borg_repository'
}

(( $+functions[_borg-config] )) ||
_borg-config() {
  local -a common_options
  __borg_setup_common_options

  _arguments -s -w -S : \
    '(-c --cache)'{-c,--cache}'[get and set values from the repo cache]' \
    '(-d --delete)'{-d,--delete}'[delete the key from the config]' \
    '(-l --list)'{-l,--list}'[list the configuration of the repo]' \
    $common_options \
    ': :_borg_repository' \
    ': : _borg_config $line[1]' \
    '::VALUE'
}

(( $+functions[_borg-create] )) ||
_borg-create() {
  local -a common_options common_create_options state line
  local curcontext="$curcontext" state_descr
  declare -A opt_args
  local -i ret=1
  __borg_setup_common_options
  __borg_setup_common_create_options

  local lastspec='*:PATH:_files'
  (( $words[(I)--content-from-command] )) &&
    lastspec='*:::PATH:->command'

  _arguments -C -s -w -S : \
    '*'{-e,--exclude}'=[exclude paths matching PATTERN]: : _borg_style_selector_or_archive_files -f -e "$line[1]" fm "${(@)line[2,-1]}"' \
    '*--pattern=[experimental: include/exclude paths matching PATTERN]: : _borg_style_selector_or_archive_files -p -f -e "$line[1]" sh "${(@)line[2,-1]}"' \
    $common_create_options \
    '(-s --stats)--json[Output stats as JSON. Implies --stats.]' \
    '--no-cache-sync[experimental: do not synchronize the cache. Implies not using the files cache.]' \
    '--stdin-name=[use NAME in archive for stdin data (default: "stdin")]:NAME' \
    '--content-from-command[interpret PATH as command and store its stdout]' \
    '--exclude-nodump[exclude files flagged NODUMP]' \
    '(-x --one-file-system)'{-x,--one-file-system}'[stay in the same file system]' \
    '--numeric-owner[only store numeric user and group identifiers]' \
    '--noatime[do not store atime into archive]' \
    '--atime[do store atime into archive]' \
    '--noctime[do not store ctime into archive]' \
    '--nobirthtime[do not store birthtime (creation date) into archive]' \
    '--nobsdflags[deprecated, use --noflags instead]' \
    '--noacls[do not read and store ACLs into archive]' \
    '--noxattrs[do not read and store xattrs into archive]' \
    '--noflags[do not read and store flags (e.g. NODUMP, IMMUTABLE) into archive]' \
    '--files-cache=[operate files cache in MODE. default: ctime,size,inode]:MODE:(ctime,size,inode mtime,size,inode ctime,size mtime,size rechunk,ctime rechunk,mtime size disabled)' \
    '--read-special[open and read block and char device files as well as FIFOs as if they were regular files]' \
    $common_options \
    ':ARCHIVE: _borg_repository_or_archive -a -p' \
    $lastspec && ret=0

  case $state in
  (command)
    if (( CURRENT <= 1 )); then
      _command_names -e && ret=0
    else
      _normal && ret=0
    fi
    ;;
  esac

  return ret
}

(( $+functions[_borg-debug] )) ||
_borg-debug() {
  local -a state line common_options
  local curcontext="$curcontext" state_descr
  declare -A opt_args
  local -i ret=1
  __borg_setup_common_options

  _arguments -s -w -C : \
    $common_options \
    ': :->command' \
    '*:: :->option-or-argument' && ret=0

  case $state in
  (command)
    local -a debug_commands=(
      'info:show system infos for debugging / bug reports'
      'dump-archive-items:dump archive items (metadata)'
      'dump-archive:dump decoded archive metadata'
      'dump-manifest:dump decoded repository metadata'
      'dump-repo-objs:dump repo objects'
      'search-repo-objs:search repo objects'
      'get-obj:get object from repository'
      'put-obj:put object to repository'
      'delete-obj:delete object from repository'
      'refcount-obj:show refcount for object from repository'
      'dump-hints:dump repository hints'
      'convert-profile:convert Borg profile to Python profile'
    )
    _describe -t commands 'command' debug_commands && ret=0
    ;;
  (option-or-argument)
    curcontext="${curcontext%:*}-$line[1]:"

    case $line[1] in
    (info)
      _arguments -s -w -S : \
        $common_options && ret=0
      ;;
    (dump-archive-items)
      _arguments -s -w -S : \
        $common_options \
        ':ARCHIVE: _borg_repository_or_archive -a' && ret=0
      ;;
    (dump-archive)
      _arguments -s -w -S : \
        $common_options \
        ':ARCHIVE: _borg_repository_or_archive -a' \
        ':PATH:_files' && ret=0
      ;;
    (dump-manifest)
      _arguments -s -w -S : \
        $common_options \
        ': :_borg_repository' \
        ':PATH:_files' && ret=0
      ;;
    (dump-repo-objs)
      _arguments -s -w -S : \
        $common_options \
        ': :_borg_repository' && ret=0
      ;;
    (search-repo-objs)
      _arguments -s -w -S : \
        $common_options \
        ': :_borg_repository' \
        ':WANTED (hex or string):' && ret=0
      ;;
    (get-obj)
      _arguments -s -w -S : \
        $common_options \
        ': :_borg_repository' \
        ':ID (hex object):' \
        ':PATH:_files' && ret=0
      ;;
    (put-obj)
      _arguments -s -w -S : \
        $common_options \
        ': :_borg_repository' \
        '*:PATH:_files' && ret=0
      ;;
    (delete-obj)
      _arguments -s -w -S : \
        $common_options \
        ': :_borg_repository' \
        '*:ID (hex object):'  && ret=0
      ;;
    (refcount-obj)
      _arguments -s -w -S : \
        $common_options \
        ': :_borg_repository' \
        '*:ID (hex object):'  && ret=0
      ;;
    (dump-hints)
      _arguments -s -w -S : \
        $common_options \
        ': :_borg_repository' \
        '*:PATH:_files' && ret=0
      ;;
    (convert-profile)
      _arguments -s -w -S : \
        $common_options \
        ':INPUT:_files' \
        ':OUTPUT:_files' && ret=0
      ;;
    (*)
      if ! _call_function ret _borg_debug_$line[1]; then
        _default && ret=0
      fi
      ;;
    esac
    ;;
  esac

  return ret
}

(( $+functions[_borg-delete] )) ||
_borg-delete() {
  local -a common_options common_archive_filters_options common_dry_run_stats_options
  __borg_setup_common_options
  __borg_setup_common_archive_filters_options
  __borg_setup_common_dry_run_stats_options

  _arguments -s -w -S : \
    $common_dry_run_stats_options \
    '--cache-only[delete only the local cache for the given repository]' \
    '*--force[force deletion of corrupted archives, use "--force --force" in case "--force" does not work]' \
    '--keep-security-info[keep the local security info when deleting a repository]' \
    '--save-space[work slower, but using less space]' \
    $common_archive_filters_options \
    $common_options \
    ':REPOSITORY_OR_ARCHIVE: _borg_repository_or_archive' \
    '*:ARCHIVE: _borg_archive "${line[1]%%::*}"'
}

(( $+functions[_borg-diff] )) ||
_borg-diff() {
  local -a common_options common_exclude_options
  __borg_setup_common_options
  __borg_setup_common_exclude_options

  _arguments -s -w -S : \
    '--numeric-owner[only obey numeric user and group identifiers]' \
    '--same-chunker-params[override check of chunker parameters]' \
    '--sort[sort the output lines by file path]' \
    '--json-lines[format output as JSON Lines]' \
    $common_exclude_options \
    $common_options \
    ':ARCHIVE1: _borg_repository_or_archive -a' \
    ':ARCHIVE2: _borg_archive "${line[1]%%::*}"' \
    '*: : _borg_style_selector_or_archive_files -e "$line[1]" pp'
}

(( $+functions[_borg-export-tar] )) ||
_borg-export-tar() {
  local -a common_options common_exclude_extract_options
  __borg_setup_common_options
  __borg_setup_common_exclude_extract_options

  _arguments -s -w -S : \
    '--tar-filter[filter program to pipe data through]: :_cmdstring' \
    '--list[output verbose list of items (files, dirs, ...)]' \
    $common_exclude_extract_options \
    $common_options \
    ':ARCHIVE: _borg_repository_or_archive -a' \
    ':FILE:_files' \
    '*: : _borg_style_selector_or_archive_files -e "$line[1]" pp'
}

(( $+functions[_borg-extract] )) ||
_borg-extract() {
  local -a common_options common_exclude_extract_options
  __borg_setup_common_options
  __borg_setup_common_exclude_extract_options

  _arguments -s -w -S : \
    '--list[output verbose list of items (files, dirs, ...)]' \
    '(-n --dry-run)'{-n,--dry-run}'[do not actually change any files]' \
    '--numeric-owner[only obey numeric user and group identifiers]' \
    '--nobsdflags[deprecated, use --noflags instead]' \
    '--noacls[do not extract/set ACLs]' \
    '--noxattrs[do not extract/set xattrs]' \
    '--noflags[do not extract/set flags (e.g. NODUMP, IMMUTABLE)]' \
    '--stdout[write all extracted data to stdout]' \
    '--sparse[create holes in output sparse file from all-zero chunks]' \
    $common_exclude_extract_options \
    $common_options \
    ':ARCHIVE: _borg_repository_or_archive -a' \
    '*: : _borg_style_selector_or_archive_files -e "$line[1]" pp'
}

(( $+functions[_borg-help] )) ||
_borg-help() {
  local -a common_options
  __borg_setup_common_options

  _arguments -s -w -S : \
    '--epilog-only' \
    '--usage-only' \
    $common_options \
    ':: : _alternative "topics:TOPIC:(patterns placeholders compression)" ": :_borg_commands"'
}

(( $+functions[_borg-info] )) ||
_borg-info() {
  local -a common_options common_archive_filters_options
  __borg_setup_common_options
  __borg_setup_common_archive_filters_options

  _arguments -s -w -S : \
    '--json[format output as JSON]' \
    $common_archive_filters_options \
    $common_options \
    '::REPOSITORY_OR_ARCHIVE: _borg_repository_or_archive'
}

(( $+functions[_borg-init] )) ||
_borg-init() {
  local -i ret=1
  local -a common_options common_init_options
  __borg_setup_common_options
  __borg_setup_common_init_options

  # special handling for the required optional argument
  if (( ! ${words[(I)(-e|--encryption)(|=*)]} )); then
    local desc='select encryption key mode'
    local -a long=( "--encryption:$desc" ) short=( "-e:$desc" ) remove_chars=( -r '= \t\n\-' )
    _describe -t required-options 'required option' long -S '=' $remove_chars -- short $remove_chars && ret=0
  fi

  _arguments -s -w -S : \
    '(-e --encryption)'{-e,--encryption}'=[select encryption key mode (required)]:MODE:(none keyfile keyfile-blake2 repokey repokey-blake2 authenticated authenticated-blake2)' \
    $common_init_options \
    '--make-parent-dirs[create parent directories]' \
    '::REPOSITORY:_directories' && ret=0

  return ret
}

(( $+functions[_borg-key] )) ||
_borg-key() {
  local -a state line common_options
  local curcontext="$curcontext" state_descr
  declare -A opt_args
  local -i ret=1
  __borg_setup_common_options

  _arguments -s -w -C : \
    $common_options \
    ': :->command' \
    '*:: :->option-or-argument' && ret=0

  case $state in
  (command)
    local -a key_commands=(
      'change-passphrase:Change repository key file passphrase'
      'export:Export the repository key for backup'
      'import:Import the repository key from backup'
      'migrate-to-repokey:Migrate passphrase -> repokey'
    )
    _describe -t commands 'command' key_commands && ret=0
    ;;
  (option-or-argument)
    curcontext="${curcontext%:*}-$line[1]:"

    case $line[1] in
    (change-passphrase)
      _arguments -s -w -S : \
        $common_options \
        ': :_borg_repository' && ret=0
      ;;
    (export)
      _arguments -s -w -S : \
        '--paper[create an export suitable for printing and later type-in]' \
        '--qr-html[create an html file suitable for printing and later type-in or qr scan]' \
        $common_options \
        ': :_borg_repository' \
        '::PATH:_files' && ret=0
      ;;
    (import)
      _arguments -s -w -S : \
        '--paper[interactively import from a backup done with --paper]' \
        $common_options \
        ': :_borg_repository' \
        '::PATH:_files' && ret=0
      ;;
    (migrate-to-repokey)
      _arguments -s -w -S : \
        $common_options \
        ':: :_borg_repository' && ret=0
      ;;
    (*)
      if ! _call_function ret _borg_key_$line[1]; then
        _default && ret=0
      fi
      ;;
    esac
    ;;
  esac

  return ret
}

(( $+functions[_borg-list] )) ||
_borg-list() {
  local -a common_options common_exclude_options common_archive_filters_options
  __borg_setup_common_options
  __borg_setup_common_exclude_options
  __borg_setup_common_archive_filters_options

  _arguments -s -w -S : \
    '--consider-checkpoints[show checkpoint archives in the repository contents list (default: hidden)]' \
    '--short[only print file/directory names, nothing else]' \
    {--format,--list-format}'=[specify format for file listing]:FORMAT: _borg_format_keys $line[1]' \
    '--json[Only valid for listing repository contents. Format output as JSON.]' \
    '--json-lines[Only valid for listing archive contents. Format output as JSON Lines.]' \
    $common_archive_filters_options \
    $common_exclude_options \
    $common_options \
    ':REPOSITORY_OR_ARCHIVE: _borg_repository_or_archive' \
    '*: : _borg_style_selector_or_archive_files -e "$line[1]" pp'
}

(( $+functions[_borg-mount] )) ||
_borg-mount() {
  local -a common_options common_exclude_extract_options common_archive_filters_options
  __borg_setup_common_options
  __borg_setup_common_exclude_extract_options
  __borg_setup_common_archive_filters_options

  _arguments -s -w -S : \
    $* \
    '--consider-checkpoints[show checkpoint archives in the repository contents list (default: hidden)]' \
    '(-f --foreground)'{-f,--foreground}'[stay in foreground, do not daemonize]' \
    '-o[mount options]: :_fuse_values "mount options"
          "versions[merged, versioned view of the files in the archives]"
          "allow_damaged_files[read damaged files]"
          "ignore_permissions[not enforce \"default_permissions\"]"' \
    $common_archive_filters_options \
    $common_exclude_extract_options \
    $common_options \
    ':REPOSITORY_OR_ARCHIVE: _borg_repository_or_archive' \
    ':MOUNTPOINT:_directories' \
    '*: : _borg_style_selector_or_archive_files "$line[1]" pp'
}

(( $+functions[_borg-prune] )) ||
_borg-prune() {
  local -a common_options common_prefix_and_glob_archives_filter_options common_dry_run_stats_options
  __borg_setup_common_options
  __borg_setup_common_prefix_and_glob_archives_filter_options
  __borg_setup_common_dry_run_stats_options

  _arguments -s -w -S : \
    $common_dry_run_stats_options \
    '*--force[force pruning of corrupted archives, use "--force --force" in case "--force" does not work]' \
    '--list[output verbose list of archives it keeps/prunes]' \
    '--keep-within[keep all archives within this time interval]: : _borg_guard_unsigned_number "INTERVAL"' \
    '(--keep-last --keep-secondly)'{--keep-last,--keep-secondly}'[number of secondly archives to keep]: : _borg_guard_unsigned_number "N"' \
    '--keep-minutely[number of minutely archives to keep]: : _borg_guard_unsigned_number "N"' \
    '(-H --keep-hourly)'{-H,--keep-hourly}'[number of hourly archives to keep]: : _borg_guard_unsigned_number "N"' \
    '(-d --keep-daily)'{-d,--keep-daily}'[number of daily archives to keep]: : _borg_guard_unsigned_number "N"' \
    '(-w --keep-weekly)'{-w,--keep-weekly}'[number of weekly archives to keep]: : _borg_guard_unsigned_number "N"' \
    '(-m --keep-monthly)'{-m,--keep-monthly}'[number of monthly archives to keep]: : _borg_guard_unsigned_number "N"' \
    '(-y --keep-yearly)'{-y,--keep-yearly}'[number of yearly archives to keep]: : _borg_guard_unsigned_number "N"' \
    '--save-space[work slower, but using less space]' \
    $common_prefix_and_glob_archives_filter_options \
    $common_options \
    ':: :_borg_repository'
}

(( $+functions[_borg-recreate] )) ||
_borg-recreate() {
  local -a common_options common_create_options
  __borg_setup_common_options
  __borg_setup_common_create_options

  local -a mods=(
    'if-different:recompress if current compression is with a different compression algorithm (the level is not considered)'
    'always:recompress even if current compression is with the same compression algorithm (use this to change the compression level)'
    'never:do not recompress (use this option explicitly to prevent recompression)'
  )
  mods=( ${(q)mods//\\/\\\\} )
  mods=( ${mods//:/\\:} )

  _arguments -s -w -S : \
    $common_create_options \
    '--target=[create a new archive with the name ARCHIVE]:ARCHIVE: _borg_placeholder_or_archive "${line[1]%%\:\:*}"' \
    '--recompress=[recompress data chunks according to "MODE" and "--compression"]:MODE:'"(($mods))" \
    $common_options \
    ':REPOSITORY_OR_ARCHIVE: _borg_repository_or_archive' \
    '*: : _borg_style_selector_or_archive_files -e "$line[1]" pp'
}

(( $+functions[_borg-rename] )) ||
_borg-rename() {
  local -a common_options
  __borg_setup_common_options

  _arguments -s -w -S : \
    $common_options \
    ':ARCHIVE: _borg_repository_or_archive -a' \
    ':NEWNAME'
}

(( $+functions[_borg-serve] )) ||
_borg-serve() {
  local -a common_options common_init_options
  __borg_setup_common_options
  __borg_setup_common_init_options

  _arguments -s -w -S : \
    $common_init_options \
    '*--restrict-to-path=[restrict repository access to PATH]:PATH:_files' \
    '*--restrict-to-repository=[restrict repository access]: :_borg_repository'
}

(( $+functions[_borg-umount] )) ||
_borg-umount() {
  local -a common_options
  __borg_setup_common_options

  _arguments -s -w -S : \
    $common_options \
    ':MOUNTPOINT:_umountable'
}

(( $+functions[_borg-upgrade] )) ||
_borg-upgrade() {
  local -a common_options
  __borg_setup_common_options

  _arguments -s -w -S : \
    '(-n --dry-run)'{-n,--dry-run}'[do not change repository]' \
    '--inplace[rewrite repository in place, with no chance of going back to older versions of the repository]' \
    '--force[force upgrade]' \
    '--tam[enable manifest authentication (in key and cache)]' \
    '--disable-tam[disable manifest authentication (in key and cache)]' \
    $common_options \
    ':: :_borg_repository'
}

(( $+functions[_borg-with-lock] )) ||
_borg-with-lock() {
  local -a state line common_options
  local curcontext="$curcontext" state_descr
  declare -A opt_args
  local -i ret=1
  __borg_setup_common_options

  _arguments -s -w -C -S : \
    $common_options \
    '(-): :_borg_repository' \
    '(-):COMMAND: _command_names -e' \
    '(-)*:ARGS:->normal' && ret=0

  case $state in
  (normal)
    shift 2 words
    (( CURRENT -= 2 ))
    _normal && ret=0
    ;;
  esac

  return ret
}

(( $+functions[__borg_setup_common_options] )) ||
__borg_setup_common_options() {
  typeset -ga common_options=(
    '(- :)'{-h,--help}'[show this help message and exit]'
    '--critical[work on log level CRITICAL]'
    '--error[work on log level ERROR]'
    '--warning[work on log level WARNING (default)]'
    '(--info -v --verbose)'{--info,-v,--verbose}'[work on log level INFO]'
    '--debug[work on log level DEBUG]'
    '--debug-topic=[enable TOPIC debugging (can be specified multiple times)]:TOPIC'
    '(-p --progress)'{-p,--progress}'[show progress information]'
    '--log-json[Output one JSON object per log line instead of formatted text.]'
    '--lock-wait=[wait at most SECONDS for acquiring a repository/cache lock (default: 1)]: : _borg_guard_unsigned_number "SECONDS"'
    '--bypass-lock[bypass locking mechanism]'
    '(- :)--show-version[show/log the borg version]'
    '--show-rc[show/log the return code (rc)]'
    '--umask=[set umask to M (local only, default: 0077)]:M'
    '--remote-path=[set remote path to executable (default: "borg")]: :_cmdstring'
    '--remote-ratelimit=[set remote network upload rate limit in kiByte/s (default: 0=unlimited)]: : _borg_guard_unsigned_number "RATE"'
    '--remote-buffer=[set upload buffer size in MiB. (default: 0=no buffer)]: : _borg_guard_unsigned_number "UPLOAD_BUFFER"'
    '--consider-part-files[treat part files like normal files (e.g. to list/extract them)]'
    '--debug-profile=[write execution profile in Borg format into FILE]:FILE:_files'
    '--rsh=[use COMMAND instead of ssh]: :_cmdstring'
  )
}

(( $+functions[__borg_setup_common_exclude_options] )) ||
__borg_setup_common_exclude_options() {
  typeset -ga common_exclude_options=(
    '*'{-e,--exclude}'=[exclude paths matching PATTERN]: : _borg_style_selector_or_archive_files "$line[1]" fm'
    '*--exclude-from=[read exclude patterns from EXCLUDEFILE, one per line]:EXCLUDEFILE:_files'
    '*--pattern=[experimental: include/exclude paths matching PATTERN]: : _borg_style_selector_or_archive_files -p "$line[1]" sh'
    '*--patterns-from=[experimental: read include/exclude patterns from PATTERNFILE, one per line]:PATTERNFILE:_files'
  )
}

(( $+functions[__borg_setup_common_exclude_extract_options] )) ||
__borg_setup_common_exclude_extract_options() {
  local -a common_exclude_options
  __borg_setup_common_exclude_options
  typeset -ga common_exclude_extract_options=(
    $common_exclude_options
    '--strip-components=[Remove the specified number of leading path elements. Paths with fewer elements will be silently skipped.]: : _borg_guard_unsigned_number "NUMBER"'
  )
}

(( $+functions[__borg_setup_common_prefix_and_glob_archives_filter_options] )) ||
__borg_setup_common_prefix_and_glob_archives_filter_options() {
  typeset -ga common_prefix_and_glob_archives_filter_options=(
    '(-P --prefix -a --glob-archives)'{-P,--prefix}'=[only consider archive names starting with this prefix]:PREFIX: _borg_archive -n "${line[1]%%\:\:*}"'
    '(-P --prefix)*'{-a,--glob-archives}'=[only consider archive names matching the glob]:GLOB: _borg_archive -n "${line[1]%%\:\:*}"'
  )
}

(( $+functions[__borg_setup_common_archive_filters_options] )) ||
__borg_setup_common_archive_filters_options() {
  local -a common_prefix_and_glob_archives_filter_options
  __borg_setup_common_prefix_and_glob_archives_filter_options
  typeset -ga common_archive_filters_options=(
    $common_prefix_and_glob_archives_filter_options
    '--sort-by=[Comma-separated list of sorting keys, default: timestamp]:KEYS:(timestamp name id)'
    '(--last)--first=[consider first N archives after other filters were applied]:N: _borg_archive -n "${line[1]%%\:\:*}"'
    '(--first)--last=[consider last N archives after other filters were applied]:N: _borg_archive -n "${line[1]%%\:\:*}"'
  )
}

(( $+functions[__borg_setup_common_dry_run_stats_options] )) ||
__borg_setup_common_dry_run_stats_options() {
  typeset -ga common_dry_run_stats_options=(
    '(-n --dry-run -s --stats)'{-n,--dry-run}'[do not change anything]'
    '(-n --dry-run -s --stats)'{-s,--stats}'[print statistics at end]'
    # NOTE: actual messages for subcommands differ in details
  )
}

(( $+functions[__borg_setup_common_create_options] )) ||
__borg_setup_common_create_options() {
  local -a common_dry_run_stats_options common_exclude_options
  __borg_setup_common_dry_run_stats_options
  __borg_setup_common_exclude_options
  typeset -ga common_create_options=(
    $common_dry_run_stats_options
    '--list[output verbose list of items (files, dirs, ...)]'
    '--filter=[only display items with the given status characters]: :_borg_statuschars'
    $common_exclude_options
    '--exclude-caches[exclude directories that contain a CACHEDIR.TAG file]'
    '*--exclude-if-present=[exclude directories that are tagged by containing a filesystem object with the given NAME]:NAME:_files'
    '--keep-exclude-tags[if tag objects are specified with --exclude-if-present, don'\''t omit the tag objects themselves]'
    '--comment=[add a comment text to the archive]:COMMENT:_borg_placeholders'
    '--timestamp=[manually specify the archive creation date/time]:TIMESTAMP:_borg_timestamp'
    '(-c --checkpoint-interval)'{-c,--checkpoint-interval}'=[write checkpoint every SECONDS seconds (default: 1800)]: : _borg_guard_unsigned_number "SECONDS"'
    '--chunker-params=[specify the chunker parameters]: :_borg_chunker_params_examples'
    '(-C --compression)'{-C,--compression}'=[select compression algorithm]: :_borg_compression'
  )
}

(( $+functions[__borg_setup_common_init_options] )) ||
__borg_setup_common_init_options() {
  local -a common_options
  __borg_setup_common_options
  typeset -ga common_init_options=(
    $common_options
    '--append-only[only allow appending to repository segment files]'
    '--storage-quota=[override storage quota of the repository]: :_borg_quota_suffixes'
  )
}

(( $+functions[_borgfs] )) ||
_borgfs() {
  _borg-mount '(- :)'{-V,--version}'[show version number and exit]'
}

(( $+functions[_borg_parameters] )) ||
_borg_parameters() {
  local name=$1
  shift
  local -i ret=1
  local -a expl

  case $name in
  (REPO)
    local BORG_REPO
    unset BORG_REPO
    _borg_repository && ret=0
    ;;
  ((|NEW_)PASSPHRASE)
    _message -e 'passphrase' && ret=0
    ;;
  (DISPLAY_PASSPHRASE)
    _message -e 'answer to the "display the passphrase for verification" question' && ret=0
    ;;
  (HOST_ID)
    _message -e 'unique ID' && ret=0
    ;;
  (FILES_CACHE_TTL)
    _borg_guard_unsigned_number 'time to live (default: 20)' && ret=0
    ;;
  (MOUNT_DATA_CACHE_ENTRIES)
    _borg_guard_unsigned_number 'number of cached data chunks' && ret=0
    ;;
  (PASSCOMMAND|RSH|REMOTE_PATH)
    _cmdstring && ret=0
    ;;
  (HOSTNAME_IS_UNIQUE|SHOW_SYSINFO|(UNKNOWN_UNENCRYPTED|RELOCATED)_REPO_ACCESS_IS_OK)
    _description values expl 'value'
    compadd "$expl[@]" yes no && ret=0
    ;;
  ((CHECK|DELETE)_I_KNOW_WHAT_I_AM_DOING)
    _description values expl 'value'
    compadd "$expl[@]" YES NO && ret=0
    ;;
  (SELFTEST)
    _description values expl 'value'
    compadd "$expl[@]" disabled && ret=0
    ;;
  (WORKAROUNDS)
    _wanted workarounds expl 'workaround' _sequence compadd - basesyncfile && ret=0
    ;;
  (KEYS_DIR)
    _directories && ret=0
    ;;
  (*)
    _default && ret=0
    ;;
  esac

  return ret
}

(( $+functions[_borg_repository] )) ||
_borg_repository() {
  local -a alts opts qopts
  zparseopts -E -a opts S:
  qopts=( ${(q)opts} )
  [[ -n $BORG_REPO ]] && alts+=( "default-repository: : __borg_default_repository $qopts" )
  alts+=( "cached-repositories:cached repositories:_borg_cached_repositories $qopts" )
  alts+=( 'directories: :_directories -r ":/ \t\n\-"' )
  alts+=( 'remote-repositories: : _borg_remote_repositories' )
  _alternative $alts
}

(( $+functions[__borg_default_repository] )) ||
__borg_default_repository() {
  local -a opts suf
  zparseopts -E -a opts S:
  (( $opts[(I)-S] )) && suf=( -S '' )
  local -a default_repository=( "\:\::$BORG_REPO" )
  _describe -t default-repository 'default repository' default_repository "$suf[@]"
}

(( $+functions[_borg_cached_repositories] )) ||
_borg_cached_repositories() {
  local -a cached_repos
  local sed_script='/^previous_location = / {
    s///
    # no port was given
    /ssh:\/\/[^/:]+:[0-9]+/! {
      # lstrip the `ssh://` prefix and add a colon before the first slash
      s!ssh://([^:/]+)/(.*)!\1:/\2!
    }
    p
  }'
  local cachedir=${BORG_CACHE_DIR:-${XDG_CACHE_HOME:-${BORG_BASE_DIR:-$HOME}/.cache}/borg}
  cached_repos=( ${(f)"$(_call_program -p cached-repositories sed -n -E ${(q)sed_script} \
    "${(q)cachedir}/*/config(#qN.om)" 2>/dev/null)"} )

  if [[ $compstate[quote] != (\'|\") ]]; then
    # hide ~BORG_REPO and other scalars
    local BORG_REPO
    unset BORG_REPO sed_script cachedir
    cached_repos=( "${(@D)cached_repos}" )
  fi

  compadd -Q "$@" -r ': \t\n\-' -a cached_repos
}

(( $+functions[_borg_remote_repositories] )) ||
_borg_remote_repositories() {
  local -a match mbegin mend expl alts
  if compset -P '(#b)ssh://[^/]##@[^/]##:([0-9]##)/'; then
    _remote_files -/ -- ssh -p $match[1]
    return
  fi
  local -i have_scheme=0
  compset -P 'ssh://' && have_scheme=1
  if compset -P '*:'; then
    (( have_scheme )) && alts+=( 'ports: : _borg_guard_unsigned_number "port"' )
    alts+=( 'remote-files:remote file: _remote_files -/ -- ssh' )
    _alternative $alts
  elif compset -P 1 '(#b)(*)@'; then
    local user=$match[1]
    _wanted -C user-at hosts expl "host for $user" \
      _combination -s '[:@]' accounts users-hosts users="$user" hosts -S ':' -
  elif compset -S '@*'; then
    _wanted users expl "user" \
      _combination -s '[:@]' accounts users-hosts users -q -
  else
    alts=(
      'users:user:_users -S "@"'
      'hosts:host:_hosts -S ":"'
    )
    (( ! have_scheme )) && alts+=( 'prefixes:ssh:compadd -S "" ssh://' )
    _alternative $alts
  fi
}

# _borg_repository_or_archive [-a] [-p]
#
# -a archive is mandatory. The suffix `::` will be added to the repository if possible.
# -p complete placeholders
(( $+functions[_borg_repository_or_archive] )) ||
_borg_repository_or_archive() {
  local -A opts
  zparseopts -A opts -D -E a p

  if compset -P 1 '*::'; then
    local qrepo=$IPREFIX[1,-3]
    local -i def_repo=0
    [[ -z $qrepo && -n $BORG_REPO ]] && qrepo=${(q)BORG_REPO} && def_repo=1
    if [[ -n $qrepo ]]; then

      if (( ! def_repo )); then
        case $compstate[quote] in
          (\') qrepo=${(qq)qrepo} ;;
          (\") qrepo=${(qqq)${(e)qrepo}} ;;
          # NOTE: currently `(e)` don't have any effect, but maybe one day zsh will stop to change the quoting method
          #       of double quoted parameters
        esac
      fi

      if (( $+opts[-p] )); then
        _borg_placeholder_or_archive $qrepo
      else
        _borg_archive $qrepo
      fi
    else
      _message "not a borg repository: ${(Q)qrepo}"
      return 1
    fi
  else
    local -a suf
    if ! compset -S '::*'; then
      if (( $+opts[-a] )) || zstyle -T ":completion:${curcontext}:repositories" repository-suffix; then
        suf=( -S '::' )
      fi
      local oqrepo="$PREFIX$SUFFIX"
      local qrepo=$oqrepo
      [[ $compstate[quote] != (\'|\") ]] && qrepo=${(Q)qrepo}
      if __borg_is_borg_repo $qrepo; then
        qrepo=${oqrepo%%/}
        [[ -z $SUFFIX ]] && PREFIX=${PREFIX%%/} || SUFFIX=${SUFFIX%%/}
        compadd -S '::' -r ':/ \t\n\-' -Q -- $qrepo
        return
      fi
    fi
    _borg_repository "$suf[@]"
  fi
}

# _borg_archive [-F] [-n] [qrepo]
#
# -F don't apply archive filter options on the command line
# -n reverse order, disable matchers and don't do menu completion/selection
(( $+functions[_borg_archive] )) ||
_borg_archive() {
  local -A opts
  zparseopts -A opts -D -E F n

  local qrepo=$1

  if [[ -z $qrepo ]]; then
    if [[ -n $BORG_REPO ]]; then
      qrepo=${(q)BORG_REPO}
    else
      _message 'no repository specified'
      return 1
    fi
  fi

  local -i ret=1
  _tags archives
  while _tags; do

    if _requested archives; then

      local -a expl disp archive_filters
      local -i reversed_order=1

      if (( ! $+opts[-F] )); then
        local -a archive_filter_options=( -P --prefix -a --glob-archives --first --last --sort-by ) tmp
        local k
        for k in $archive_filter_options; do
          if [[ -n $opt_args[$k] ]]; then
            IFS=: read -A tmp <<<$opt_args[$k]
            archive_filters+=( $k=${^tmp:#} )
          fi
        done
      fi

      if (( $+opts[-n] )); then
        __borg_skip_pattern_matching || return 1

        disp+=( -U )

        compstate[insert]=''
        compstate[list]='list force'

        reversed_order=0
      fi

      local -a asort
      zstyle -a ":completion:${curcontext}:archives" archive-sort asort
      if (( $asort[(I)inverse] )); then
        (( reversed_order = ! reversed_order ))
      fi
      local -a sort_by=( --sort-by=${(M)^asort:#(timestamp|name|id)} )
      # NOTE: in case of option repetition, the later one takes precedence

      if (( ! $+__borg_archives_need_update )); then
        comppostfuncs+=( __borg_unset_archives_need_update )
        typeset -gHi __borg_archives_need_update=1
        if (( ! $#archive_filters && ! $+opts[-n] )); then
          local erepo
          [[ -n $1 ]] && __borg_expand_path ${(Q)qrepo} erepo
          local -a newest_file=( $erepo/(hints|index|integrity).<1->(#qN.om[1]) )
          if [[ -n $newest_file ]]; then
            if zmodload -F zsh/stat b:zstat 2>/dev/null; then
              local -a stats
              zstat -A stats +mtime $newest_file
              local -i mtime=$stats[1]
              if [[ $__borg_prev_repo    ==  $erepo
                 && __borg_prev_mtime    -ge mtime
                 && $__borg_prev_order   ==  $reversed_order
                 && $__borg_prev_sort_by ==  $sort_by ]]
              then
                __borg_archives_need_update=0
              else
                typeset -gH  __borg_prev_repo=$erepo
                typeset -gHi __borg_prev_mtime=mtime __borg_prev_order=reversed_order
                typeset -gHa __borg_prev_sort_by=( $sort_by )
              fi
            fi
          fi
        else
          unset __borg_prev_{repo,mtime,order,sort_by}
          comppostfuncs+=( __borg_unset_archives )
        fi
      fi

      if zstyle -t ":completion:${curcontext}:archives" verbose; then
        if (( __borg_archives_need_update || ! $+__borg_archive_names || ! $+__borg_archive_descriptions )); then
          __borg_archives_need_update=0
          typeset -gHa __borg_archive_names=() __borg_archive_descriptions=()
          local fmt descfmt name desc
          zstyle -s ":completion:${curcontext}:archives" archive-description-format descfmt ||
            descfmt='{archive:<36} {time} [{id}]'
          fmt="{barchive}{NUL}$descfmt{NUL}"
          _call_program -p archive-descriptions \
            ${(q)__borg_command:-borg} list --format=${(q)fmt} ${(q)sort_by} $archive_filters $qrepo 2>/dev/null |
          while IFS= read -r -d $'\0' name && IFS= read -r -d $'\0' descr; do
            __borg_archive_names[1,0]=( $name )
            __borg_archive_descriptions[1,0]=( "$descr" )
          done
          (( $pipestatus[1] )) && {
            _message "couldn't list repository: ${(Q)qrepo}"
            unset __borg_prev_{repo,mtime,order,sort_by}
            return 1
          }
          (( ! reversed_order )) &&
            __borg_archive_names=( "${(@aO)__borg_archive_names}" ) &&
            __borg_archive_descriptions=( "${(@aO)__borg_archive_descriptions}" )
        fi
        disp+=( -ld __borg_archive_descriptions )
      elif (( __borg_archives_need_update || ! $+__borg_archive_names )); then
        __borg_archives_need_update=0
        typeset -gHa __borg_archive_names=()
        local fmt='{barchive}{NUL}'
        __borg_archive_names=( ${(@0aO)"$(_call_program -p archives \
          ${(q)__borg_command:-borg} list --format=${(q)fmt} ${(q)sort_by} $archive_filters $qrepo 2>/dev/null)"} )
        (( $pipestatus[1] )) && {
          _message "couldn't list repository: ${(Q)qrepo}"
          unset __borg_prev_{repo,mtime,order,sort_by}
          return 1
        }
        (( ! reversed_order )) &&
          __borg_archive_names=( "${(@aO)__borg_archive_names}" )
      fi

      _all_labels archives expl 'ARCHIVE' compadd "$disp[@]" -a __borg_archive_names && ret=0

    fi

    (( ret )) || return 0

  done

  return 1
}

(( $+functions[__borg_unset_archives] )) ||
__borg_unset_archives() {
  unset __borg_archive_names __borg_archive_descriptions
}

(( $+functions[__borg_unset_archives_need_update] )) ||
__borg_unset_archives_need_update() {
  unset __borg_archives_need_update
}

(( $+functions[__borg_is_borg_repo] )) ||
__borg_is_borg_repo() {
  local repo=$1
  __borg_expand_path $repo repo
  if [[ -d $repo && -d $repo/data ]]; then
    local -a files=( $repo/(hints|index|integrity).<1->(#qN.) )
    (( $#files >= 3 )) && return 0
  fi
  return 1
}

(( $+functions[__borg_expand_path] )) ||
__borg_expand_path() {
  local _path=$1
  local -a match mbegin mend
  if [[ $_path == (#b)(\~[^/]#)(|/*) ]]; then
    local etilde
    etilde=$~match[1] 2>/dev/null
    _path="$etilde$match[2]"
  fi
  _path=${(e)_path//\\\\/\\\\\\\\}
  eval typeset -g ${2:-REPLY}=\$_path
}

(( $+functions[_borg_placeholder_or_archive] )) ||
_borg_placeholder_or_archive() {
  local qrepo=$1
  shift
  _alternative \
    'placeholders: :_borg_placeholders' \
    "archives: : _borg_archive ${(q)qrepo}"
}

(( $+functions[_borg_placeholders] )) ||
_borg_placeholders() {
  local -a placeholders=(
    'hostname:The (short) hostname of the machine.'
    'fqdn:The full name of the machine.'
    'reverse-fqdn:The full name of the machine in reverse domain name notation.'
    'now:The current local date and time, by default in ISO-8601 format.  You can also supply your own format string, e.g. {now:%Y-%m-%d_%H:%M:%S}'
    'utcnow:The current UTC date and time, by default in ISO-8601 format.  You can also supply your own format string, e.g. {utcnow:%Y-%m-%d_%H:%M:%S}'
    'user:The user name (or UID, if no name is available) of the user running borg.'
    'pid:The current process ID.'
    'borgversion:The version of borg, e.g.: 1.0.8rc1'
    'borgmajor:The version of borg, only the major version, e.g.: 1'
    'borgminor:The version of borg, only major and minor version, e.g.: 1.0'
    'borgpatch:The version of borg, only major, minor and patch version, e.g.: 1.0.8'
  )
  __borg_complete_keys _describe -t placeholders 'placeholder' placeholders '"$copts[@]"'
}

(( $+functions[_borg_format_keys] )) ||
_borg_format_keys() {
  local repo_or_arch=${(Q)1}

  local -a keys=( NEWLINE NL NUL SPACE TAB CR LF )
  local -a repository_keys=( archive name barchive comment bcomment id start time end command_line hostname username )
  local -a archive_keys=( type mode uid gid user group path bpath source linktarget flags size csize dsize dcsize
    num_chunks unique_chunks mtime ctime atime isomtime isoctime isoatime blake2b blake2s md5 sha1 sha224 sha256 sha384
    sha3_224 sha3_256 sha3_384 sha3_512 sha512 shake_128 shake_256 archiveid archivename extra health )

  local akeys rkeys
  akeys='archive-keys:archive keys:compadd -a archive_keys'
  rkeys='repository-keys:repository keys:compadd -a repository_keys'
  local -a alts=( 'keys:keys:compadd -a keys' )
  if [[ $repo_or_arch == *::?* ]]; then
    alts+=( $akeys )
  elif [[ -n $repo_or_arch ]]; then
    alts+=( $rkeys )
  else
    alts+=( $rkeys $akeys )
  fi

  __borg_complete_keys _alternative -O copts ${(q)alts}
}

(( $+functions[__borg_complete_keys] )) ||
__borg_complete_keys() {
  compset -P '*[^A-Za-z]##'
  compset -S '[^A-Za-z]##*'

  [[ -n $ISUFFIX ]] && compstate[to_end]=''
  # NOTE: `[[ -n $ISUFFIX ]]` is a workaround for a bug that causes cursor movement to the right further than it should
  # NOTE: the _oldlist completer doesn't respect compstate[to_end]=''

  local ipref suf
  if [[ $IPREFIX[-1] != '{' ]]; then
    ipref='{'
    [[ $compstate[quote] != (\'|\") ]] && ipref='\{'
  fi
  if [[ $ISUFFIX[1] != (|\\)\} ]]; then
    suf='}'
    [[ $compstate[quote] != (\'|\") ]] && suf='\}'
  fi

  local -a copts=( -i "$ipref" -S "$suf" )
  eval "$@"
}

# _borg_style_selector_or_archive_files [-e] [-p] archive default_style_selector
#
# -e apply exclusion options on the command line
# -p complete `--pattern`
# -f complete files rather than borg paths
(( $+functions[_borg_style_selector_or_archive_files] )) ||
_borg_style_selector_or_archive_files() {
  local -A opts
  zparseopts -A opts -D -E e p f

  local arch=$1 default_style_selector=$2
  shift 2

  local -a match mbegin mend expl tags=( style-selectors archive-files ) ss_suf=( -S ':' -r ':' )
  (( $+opts[-f] )) && tags=( style-selectors files )
  local -i ret=1

  if (( $+opts[-p] )); then
    if ! compset -P '(#b)([RP\+\-\!])'; then
      local -a pattern_rules=(
        'P:pattern style'
        'R:root path'
        '+:include'
        '-:exclude'
        '!:exclude non-recurse'
      )
      _describe -t pattern-rules 'pattern rule' pattern_rules -S ''
      return
    else
      if [[ $compstate[quote] == (\'|\") ]]; then
        compset -P ' #'
      else
        compset -P '(\\ )#'
      fi
      if [[ $match[1] == 'R' ]]; then
        default_style_selector='pp'
      elif [[ $match[1] == 'P' ]]; then
        tags=( style-selectors )
        ss_suf=()
      fi
    fi
  fi

  _tags $tags
  while _tags; do
    if _requested style-selectors; then
      _all_labels style-selectors expl 'style selector' \
        __borg_style_selectors $default_style_selector "$ss_suf[@]" - && ret=0
    fi
    if _requested archive-files; then
      _all_labels archive-files expl 'PATTERN' \
        __borg_archive_files ${(k)opts} "$arch" $default_style_selector - && ret=0
    fi
    if _requested files; then
      local -a borg_paths=( ${(Q)${(e)${~@}}} )
      _all_labels files expl 'PATH' \
        __borg_pattern_files ${(k)opts} borg_paths - && ret=0
    fi
    (( ret )) || return 0
  done

  return 1
}

(( $+functions[__borg_style_selectors] )) ||
__borg_style_selectors() {
  local default_style_selector=$1 path_style_selector
  shift
  zstyle -s ":completion:${curcontext}:archive-files" path-style-selector path_style_selector ||
    path_style_selector='fm'
  local -a disp
  local -A style_selectors
  __borg_setup_style_selectors
  if zstyle -T ":completion:${curcontext}:style-selectors" verbose; then
    local -a style_selector_descriptions extra
    local k v sep
    for k v in ${(kv)style_selectors}; do
      extra=()
      [[ $k == $default_style_selector ]] && extra+=( 'default' )
      [[ $k == $path_style_selector ]] && __borg_choose_path_or_pattern "" "$default_style_selector" &&
        extra+=( 'path' )
      (( $#extra )) && v+=" (${(j:, :)extra})"
      style_selector_descriptions+=( "${${k//\\/\\\\}//:/\\:}:$v" )
    done
    zstyle -s ":completion:${curcontext}:style-selectors" list-separator sep || sep=--
    zformat -a style_selector_descriptions " $sep " $style_selector_descriptions
    disp=( -ld style_selector_descriptions )
  fi
  compadd "$disp[@]" "$@" -k style_selectors
}

(( $+functions[__borg_archive_files] )) ||
__borg_archive_files() {
  local -A opts
  zparseopts -A opts -D e p

  local arch=$1 default_style_selector=$2
  shift 2

  if [[ -z $arch || $arch != *::?* ]]; then
    _message 'no archive specified'
    return 1
  fi

  local -a qargs tmp disp pref match mbegin mend archive_files descs
  local -A style_selectors
  local k cword fmt descfmt style_selector path_style_selector name descr

  # take into account exclude options on the command line
  if (( $+opts[-e] )); then
    local -a exclude_options=( -e --exclude --exclude-from --pattern --pattern-from )
    local -a excludes
    for k in $exclude_options; do
      if [[ -n $opt_args[$k] ]]; then
        IFS=: read -A tmp <<<$opt_args[$k]
        excludes+=( $k="${^tmp[@]}" )
      fi
    done
    [[ -n $excludes ]] && qargs+=( "$excludes[@]" )
  fi

  (( $_matcher_num > 1 )) && return 1
  __borg_skip_pattern_matching || return 1

  cword="$PREFIX$SUFFIX"
  [[ $compstate[quote] != (\'|\") ]] && cword=${(Q)cword}

  [[ -z $cword ]] && return 1

  if zstyle -t ":completion:${curcontext}:archive-files" verbose; then
    zstyle -s ":completion:${curcontext}:archive-files" file-description-format descfmt ||
      descfmt='{mode} {user:6} {group:6} {size:8d} {mtime} {path}{extra}'
    fmt="{bpath}{NUL}$descfmt{NUL}"
  else
    fmt='{bpath}{NUL}'
  fi
  qargs+=( --format=${(q)fmt} )

  qargs+=( $arch )

  __borg_setup_style_selectors
  [[ $cword == (#b)(${~${(j:|:)${(kb)style_selectors}}}):* ]] && style_selector=$match[1]

  local -i path_expected=0
  __borg_choose_path_or_pattern "$style_selector" $default_style_selector $cword && path_expected=1

  if [[ -n $cword ]]; then
    if (( path_expected )); then
      [[ -n $style_selector ]] && compset -P "$style_selector:" && pref=( -P "$style_selector:" )
      cword="$PREFIX$SUFFIX"
      [[ $compstate[quote] != (\'|\") ]] && cword=${(Q)cword}
      zstyle -s ":completion:${curcontext}:archive-files" path-style-selector path_style_selector ||
        path_style_selector='fm'
      cword="$path_style_selector:$cword"
    else
      [[ -z $style_selector ]] && cword="$default_style_selector:$cword"
    fi
    qargs+=( ${(q)cword} )
  fi

  if zstyle -t ":completion:${curcontext}:archive-files" verbose; then
    _call_program -p archive-file-descriptions ${(q)__borg_command:-borg} list $qargs 2>/dev/null |
    while IFS= read -r -d $'\0' name && IFS= read -r -d $'\0' descr; do
      archive_files+=( $name )
      descs+=( $descr )
    done
    (( $pipestatus[1] )) && { _message "couldn't list archive: ${(Q)arch}"; return 1 }
    disp=( -ld descs )
  else
    archive_files=( ${(0)"$(_call_program -p archive-files ${(q)__borg_command:-borg} list $qargs 2>/dev/null)"} )
    (( $pipestatus[1] )) && { _message "couldn't list archive: ${(Q)arch}"; return 1 }
  fi

  if (( $#archive_files )); then
    if (( path_expected )); then
      compstate[insert]='automenu'
    else
      compstate[insert]=''
      compstate[list]='list force'
    fi
  fi

  compadd "$pref[@]" -U "$disp[@]" "$@" -a archive_files
}

(( $+functions[__borg_choose_path_or_pattern] )) ||
__borg_choose_path_or_pattern() {
  local ss=$1 defss=$2 cword=$3
  shift 2
  [[ $ss == (pp|pf) || ( -z $ss && $defss == (pp|pf) ) ]]
}

# transform borg exclude patterns into zsh ignore patterns and then complete files
(( $+functions[__borg_pattern_files] )) ||
__borg_pattern_files() {
  local -A opts
  zparseopts -A opts -D -E e p f

  local paths_varname=$1
  shift

  local -a args
  local -A style_selectors
  __borg_setup_style_selectors
  local pr_pat='[RP\+\-\!]' ss_pat="(${(j:|:)${(@kb)style_selectors}}):"
  local prs_pat="$pr_pat #"

  if (( $+opts[-e] )); then
    local -a borg_excludes exclude_options=( -e --exclude --pattern ) tmp
    local k cword
    local -i i
    for k in $exclude_options; do
      if [[ -n $opt_args[$k] ]]; then
        IFS=: read -A tmp <<<$opt_args[$k]
        tmp=( ${(Q)tmp} )
        # lstrip style selectors and pattern rules
        [[ $+opts[-p] -gt 0 || $k == --pattern ]] && tmp=( ${tmp#$~prs_pat} )
        tmp=( ${tmp#$~ss_pat} )

        # don't take into account the word under the cursor
        cword="$PREFIX$SUFFIX"
        [[ $compstate[quote] != (\'|\") ]] && cword=${(Q)cword}
        [[ $+opts[-p] -gt 0 || $k == --pattern ]] && cword=${cword#$~prs_pat}
        cword=${cword#$~ss_pat}
        i=$tmp[(I)$cword]
        (( i )) && tmp=( "${(@)tmp[1,i-1]}" "${(@)tmp[i+1,-1]}" )

        borg_excludes+=( "$tmp[@]" )
      fi
    done
    [[ -n $borg_excludes ]] && args+=( -F borg_excludes )
  fi

  [[ -n ${(P)paths_varname} ]] && args+=( -W $paths_varname )

  args+=( "$@" )

  # lstrip style selectors and pattern rules
  if (( $+opts[-p] )); then
    if [[ $compstate[quote] != (\'|\") ]]; then
      compset -P $pr_pat
      compset -P '(\\ )#'
    else
      compset -P $prs_pat
    fi
  fi
  compset -P $ss_pat

  compstate[insert]=''
  compstate[list]='list force'

  _path_files "$args[@]"
}

(( $+functions[__borg_setup_style_selectors] )) ||
__borg_setup_style_selectors() {
  typeset -gA style_selectors=(
    fm 'Fnmatch'
    sh 'Shell-style patterns'
    re 'Regular expressions'
    pp 'Path prefix'
    pf 'Path full-match'
  )
}

(( $+functions[__borg_skip_pattern_matching] )) ||
__borg_skip_pattern_matching() {
  # unset glob_complete
  [[ $compstate[pattern_match] == '*' ]] && compstate[pattern_match]=''
  # skip the _match completer
  [[ -n $compstate[pattern_match] ]] && return 1
  return 0
}

(( $+functions[_borg_config] )) ||
_borg_config() {
  local qrepo=$1
  shift

  if (( ! $+__borg_config_sect )); then
    comppostfuncs+=( __borg_unset_config )
    typeset -gH __borg_config_sect=
    typeset -gHa __borg_config_keys=()
    local sect line
    local -a match mbegin mend
    _call_program -p keys ${(q)__borg_command:-borg} config --list $qrepo 2>/dev/null | {
      IFS= read -r sect
      sect=${${sect#\[}%\]}
      __borg_config_sect=$sect
      while IFS= read -r line && [[ $line == (#b)(*)\ =\ (*) ]]; do
        __borg_config_keys+=( "${${match[1]//\\/\\\\}//:/\\:}:(current: $match[2])" )
      done
    }
  fi

  local -a alts=( 'keys:key: _describe -t keys "key" __borg_config_keys' )
  compset -P "${__borg_config_sect}." || alts+=( 'sections:section:compadd -S "." $__borg_config_sect' )
  _alternative $alts
}

(( $+functions[__borg_unset_config] )) ||
__borg_unset_config() {
  unset __borg_config_sect __borg_config_keys
}

# A simple prefix-oriented completion function for compressors. Can be improved by supporting the suffix.
(( $+functions[_borg_compression] )) ||
_borg_compression() {
  local -a nolvl=(
    'none:do not compress'
    'lz4:very high speed, very low compression'
  )
  local -a havelvl=(
    'zstd:("zstandard")'
    'zlib:("gz") medium speed, medium compression'
    'lzma:("xz") low speed, high compression'
  )
  local -a auto=(
    'auto:compress compressible, otherwise "none"'
  )
  local -a match mbegin mend
  # NOTE: Zsh's `-prefix` condition is confused by the leading parenthesis in the pattern.
  #       Fortunately, we simply need to show a message.
  if compset -P '(#b)(|auto,)(zstd|zlib|lzma),'; then
    local -i from to def
    case $match[2] in
      (zstd)      from=1 to=22 def=3 ;;
      (zlib|lzma) from=0 to=9  def=6 ;;
    esac
    _message -e "compression level (from $from to $to, default: $def)"
  elif compset -P 'auto,'; then
    _describe -t compression 'compression' nolvl -- havelvl -qS,
  else
    _describe -t compression 'compression' nolvl -- havelvl -qS, -- auto -S,
  fi
}

(( $+functions[_borg_chunker_params] )) ||
_borg_chunker_params() {
  if compset -P 'buzhash,'; then
    if compset -P '*,*,*,'; then
      _message -e 'HASH_WINDOW_SIZE'
    elif compset -P '*,*,'; then
      _message -e 'HASH_MASK_BITS (statistical medium chunk size ~= 2^HASH_MASK_BITS B)'
    elif compset -P '*,'; then
      _message -e 'CHUNK_MAX_EXP (maximum chunk size = 2^CHUNK_MAX_EXP B)'
    else
      _message -e 'CHUNK_MIN_EXP (minimum chunk size = 2^CHUNK_MIN_EXP B)'
    fi
  elif compset -P 'fixed,'; then
    if compset -P '*,'; then
      _message -e 'HEADER_SIZE (B)'
    else
      _message -e 'BLOCK_SIZE (B)'
    fi
  else
    local -a algorithms=(
      'fixed:a simple, low cpu overhead, fixed blocksize chunker, optionally supporting a header block of different size'
      'buzhash:variable, content-defined blocksize, uses a rolling hash computed by the Buzhash algorithm'
    )
    _describe -t algorithm 'ALGO' algorithms -S ,
  fi
}

(( $+functions[_borg_chunker_params_examples] )) ||
_borg_chunker_params_examples() {
  local -a params=(
    'default:buzhash,19,23,21,4095'
    'buzhash,19,23,21,4095:small amount of chunks (default)'
    'buzhash,10,23,16,4095:big amount of chunks'
  )
  params=( ${(q)params} )
  _alternative \
    'chunker-params: :_borg_chunker_params' \
    "chunker-params-examples:chunker params examples:(($params))"
}

(( $+functions[_borg_statuschars] )) ||
_borg_statuschars() {
  _values -s '' 'STATUSCHARS' \
    'A[regular file, added]' \
    'M[regular file, modified]' \
    'U[regular file, unchanged]' \
    'C[regular file, it changed while we backed it up]' \
    'E[regular file, an error happened while accessing/reading this file]' \
    'd[directory]' \
    'b[block device]' \
    'c[char device]' \
    'h[regular file, hardlink (to already seen inodes)]' \
    's[symlink]' \
    'f[fifo]' \
    'i[backup data was read from standard input (stdin)]' \
    '-[dry run, item was not backed up]' \
    'x[excluded, item was not backed up]' \
    '?[missing status code]'
}

(( $+functions[_borg_quota_suffixes] )) ||
_borg_quota_suffixes() {
  if compset -P '[0-9]##'; then
    local -a suffixes=(
      'K:10 ** 3 bytes'
      'M:10 ** 6 bytes'
      'G:10 ** 9 bytes'
      'T:10 ** 12 bytes'
      'P:10 ** 15 bytes'
    )
    # NOTE: tag `suffixes` is already in use (file extensions)
    _describe -t multiplier 'suffix' suffixes
  else
    _message -e 'QUOTA'
  fi
}

(( $+functions[_borg_timestamp] )) ||
_borg_timestamp() {
  _alternative \
    "dates:TIMESTAMP: _dates -f '%FT%T'" \
    'files:reference:_files'
}

(( $+functions[_borg_guard_unsigned_number] )) ||
_borg_guard_unsigned_number() {
  local -A opts
  zparseopts -K -D -A opts M+: J+: V+: 1 2 o+: n F: x+: X+:
  _guard '[0-9]#' ${1:-number}
}

_borg() {
  local -a match mbegin mend line state
  local curcontext="$curcontext" state_descr
  typeset -A opt_args
  local -i ret=1

  if [[ $service == 'borg' ]]; then
    local __borg_command=$words[1]

    local -a common_options
    __borg_setup_common_options

    _arguments -s -w -C : \
      '(- :)'{-V,--version}'[show version number and exit]' \
      $common_options \
      '(-): :->command' \
      '(-)*:: :->option-or-argument' && return

    case $state in
    (command)
      _borg_commands && ret=0
      ;;
    (option-or-argument)
      curcontext="${curcontext%:*:*}:borg-$words[1]:"

      if ! _call_function ret _borg-$words[1]; then
        _default && ret=0
      fi
      ;;
    esac
  elif [[ $service == (#b)-value-,BORG_(*),-default- ]]; then
    _borg_parameters $match[1] && ret=0
  elif ! _call_function ret _$service; then
    _default && ret=0
  fi

  return ret
}

_borg "$@"