#compdef svm
# ------------------------------------------------------------------------------
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# ------------------------------------------------------------------------------
# Description
# -----------
#
#  Completion script for svm (https://github.com/yuroyoro/svm)
#
# ------------------------------------------------------------------------------
# Authors
# -------
#
#  * Hideaki Miyake (https://github.com/mollifier)
#
# ------------------------------------------------------------------------------

local context curcontext="$curcontext" state line ret=1
typeset -A opt_args


local -a _1st_arguments
_1st_arguments=(
  'help:show this usage information'
  'current:show the currently use scala version'
  "list:show the scala version installed in svm_path(default is ${HOME}/.svm)"
  "versions:show the available scala version not installed"
  'install:install specific scala version'
  'remove:uninstall specific scala version and remove their sources'
  'switch:setup to use a specific scala version'
  'update-latest:install or update nightly build scala version'
  'latest:setup to use nightly build scala version'
  'stable:setup to use stable(x.x.x.final) scala version'
  'self-update:update svm itself'
)

_arguments -C \
  '(-)-h[show this usage information]' \
  '-c[show the currently use scala version]' \
  "-l[show the scala version installed in svm_path(default is ${HOME}/.svm)]" \
  '-v[show the available scala version not installed]' \
  '-i[install specific scala version]: :_svm_completion_not_installed_scala_versions' \
  '-r[uninstall specific scala version and remove their sources]: :_svm_completion_installed_scala_versions' \
  '(-s -u)'{-s,-u}'[setup to use a specific scala version]: :_svm_completion_not_selected_scala_versions' \
  '1: :->cmds' \
  '*:: :->args' && ret=0


# installed scala versions
(( $+functions[_svm_completion_installed_scala_versions] )) ||
_svm_completion_installed_scala_versions() {
  local -a _installed_versions
  _current_version="${$(_call_program installed svm current)#currently version is[[:space:]]*}"

  # collect lines starts with digit
  _installed_versions=( ${(M)${(@f)"$(_call_program installed svm list)"}:#[[:digit:]]*} )

  _describe -t installed "installed versions" _installed_versions
}

# installed and not selected scala versions
(( $+functions[_svm_completion_not_selected_scala_versions] )) ||
_svm_completion_not_selected_scala_versions() {
  local _current_version
  local -a _not_selected_versions

  _current_version="${$(_call_program installed svm current)#currently version is[[:space:]]*}"

  # collect lines starts with digit
  _not_selected_versions=( ${(M)${(@f)"$(_call_program installed svm list)"}:#[[:digit:]]*} )

  # remove current version
  _not_selected_versions=( ${_not_selected_versions:#$_current_version})
  _describe -t installed "not selected versions" _not_selected_versions
}

# not installed scala versions
(( $+functions[_svm_completion_not_installed_scala_versions] )) ||
_svm_completion_not_installed_scala_versions() {
  local -a _not_installed_versions
  # collect lines starts with digit
  _not_installed_versions=( ${(M)${(@f)"$(_call_program installed svm versions)"}:#[[:digit:]]*} )

  _describe -t notinstalled "not installed versions" _not_installed_versions
}


case $state in
  cmds)
    # action
    case $PREFIX in
      u*)
        # complete command synonyms
        local -a _synonym_arguments
        _synonym_arguments=(
          'uninstall:uninstall specific scala version and remove their sources'
          'use:setup to use a specific scala version'
          'update-latest:install or update nightly build scala version'
        )
        _describe -t actions 'svm actions' _synonym_arguments && ret=0
        ;;

      *)
        _describe -t actions 'svm actions' _1st_arguments
        _svm_completion_not_selected_scala_versions && ret=0
        ;;
    esac
    ;;  # end action

  args)
    # scala version number
    case $words[1] in
      (install)
        # install not installed version
        _arguments \
          '1: :_svm_completion_not_installed_scala_versions' \
          '--docs[download scala-devel-docs]' \
          '--sources[download scala-sources]' && ret=0
        ;;
      (update-latest)
        # update nightly build scala version
        _arguments \
          '--docs[download scala-devel-docs]' \
          '--sources[download scala-sources]' && ret=0
        ;;
      (remove|uninstall)
        # remove installed version
        _arguments \
          '1: :_svm_completion_installed_scala_versions' && ret=0
        ;;
      (switch|use)
        # use installed version
        _arguments \
          '1: :_svm_completion_not_selected_scala_versions' && ret=0
        ;;
    esac

    ;;  # end args
esac

return ret

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