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#!fish

function dvm
    if not test -f "$DVM_DIR/dvm-helper/dvm-helper"
        echo "Installation corrupt: dvm-helper is missing. Please reinstall dvm."
        return 1
    end

    set DVM_OUTPUT $DVM_DIR/.tmp/dvm-output.sh
    set DVM_OUTPUT_FISH $DVM_DIR/.tmp/dvm-output.fish

    rm -f "$DVM_OUTPUT"
    rm -f "$DVM_OUTPUT_FISH"

    env DVM_DIR=$DVM_DIR $DVM_DIR/dvm-helper/dvm-helper --shell sh $argv

    if test -e "$DVM_OUTPUT"
        # convert sh to fish
        sed -r -e  "s%export (\w+)=\"%set -gx \1 %g" -e "s%:% %g" -e "s%\"\$%%g" "$DVM_OUTPUT" > "$DVM_OUTPUT_FISH"
        source "$DVM_OUTPUT_FISH"
    end
end

#!fish

## Support functions
function __fish_dvm_using_command
  set cmd (commandline -opc)
  set subcommands $argv
  if [ (count $subcommands) -eq 0 ]
    if [ (count $cmd) -eq 1 ]
      return 0
    else
      return 1
    end
  end
  if [ (count $cmd) = (math (count $subcommands) + 1) ]
    for i in (seq (count $subcommands))
      if not test $subcommands[$i] = $cmd[(math $i + 1)]
        return 1
      end
    end
    return 0
  end
  return 1
end

## dvm
complete -f -c dvm -n '__fish_dvm_using_command' -a "install uninstall use current ls ls-remote deactivate which"

## dvm use
complete -f -c dvm -n '__fish_dvm_using_command use' -a '(command ls $DVM_DIR/bin/docker)'