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#compdef zmodload

local suf comp state line expl curcontext="$curcontext" ret=1 NORMARG
typeset -A opt_args
suf=()

_arguments -n -C -S -s \
  '(-R -P -i -u -d -a -b -c -I -p -f -e -F -m)-A[create module aliases]' \
  '(-)-R[remove module aliases]' \
  '(-A -R -F -L -m -P -l -e)-u[unload module]' \
  '(-d -e -l)-a[autoload module]' \
  '(-c -d -I -p -f -F -P -l -m -A -R)-b[autoload module for builtins]' \
  '(-b -d -I -p -f -F -P -l -m -A -R)-c[autoload module for condition codes]' \
  '(-A -R -F -I -P -a -b -c -e -f -i -l -m -p)-d[list or specify module dependencies]' \
  '(-i -u -d -a -b -c -p -f -L -R)-e[test if modules are loaded]' \
  '(-b -c -d -I -p -F -P -l -m -A -R)-f[autoload module for math functions]' \
  '(-u -b -c -d -p -f -A -R -I)-F[handle features]' \
  '(-u -b -c -d -p -f -A -R -I)-m[treat feature arguments as patterns]' \
  '(-d -e)-i[suppress error if command would do nothing]' \
  '(-d -e -L)-s[suppress error if module is not available]' \
  '(-b -c -d -p -f -F -P -m)-I[define infix condition names]' \
  '(-u -b -c -d -p -f -A -R)-l[list features]' \
  '(-e -u)-L[output in the form of calls to zmodload]' \
  '(-b -c -d -I -f -F -P -l -m -A -R)-p[autoload module for parameters]' \
  '(-u -b -c -d -p -f -A -R)-P[array param for features]:array name:_parameters' \
  '(-)*:params:->params' && ret=0

[[ $state = params ]] || return ret

if (( $+opt_args[-A] )); then
  compset -S '=*' || compset -P '*=' || suf=( -S '=' )
fi

if (( $+opt_args[-F] && CURRENT > NORMARG )); then
  local module=$words[NORMARG]
  local -a features

  if [[ $modules[$module] != loaded ]]; then
    _message -e features "feature for unloaded module"
  else
    zmodload -lFP features $module
    if compset -P -; then
      # only enabled features needed
      features=(${${features:#-*}##?})
    elif compset -P +; then
      # only disabled features needed
      features=(${${features:#+*}##?})
    else
      # complete opposite of current feature state, + is default
      features=(${${features#-}/(#s)+/-})
    fi
    _wanted features expl feature compadd -a features
  fi
else
  comp=( files aliases )
  if (( $+opt_args[-u] )); then
    if (( $+opt_args[-b] || $+opt_args[-a] )); then
      comp=( builtins )
    else
      comp=( loadedmodules aliases )
    fi
  fi
  (( $+opt_args[-a] && CURRENT > 3 )) && comp=( builtins )

  _tags "$comp[@]"
  while _tags; do
    _requested builtins expl 'builtin command' \
      compadd "$@" -k builtins && ret=0
    _requested loadedmodules expl 'loaded modules' \
      compadd -k 'modules[(R)loaded]' && ret=0
    _requested files expl 'module file' \
      _files -W module_path -g '*.(dll|s[ol]|bundle)(:r)' && ret=0
    _requested aliases expl 'module alias' \
      compadd "$suf[@]" -k 'modules[(R)alias*]' && ret=0
    (( ret )) || return 0
  done
  return ret
fi