# frozen_string_literal: true

require 'i18n/tasks/command/collection'

module I18n::Tasks
  module Command
    module Commands
      module Missing
        include Command::Collection

        missing_types = I18n::Tasks::MissingKeys.missing_keys_types
        arg :missing_types,
            '-t',
            "--types #{missing_types * ','}",
            Array,
            t('i18n_tasks.cmd.args.desc.missing_types', valid: missing_types * ', '),
            parser: OptionParsers::Enum::ListParser.new(
              missing_types,
              proc do |invalid, valid|
                I18n.t('i18n_tasks.cmd.errors.invalid_missing_type',
                       invalid: invalid * ', ', valid: valid * ', ', count: invalid.length)
              end
            )

        cmd :missing,
            pos: '[locale ...]',
            desc: t('i18n_tasks.cmd.desc.missing'),
            args: %i[locales out_format missing_types]

        def missing(opt = {})
          forest = i18n.missing_keys(**opt.slice(:locales, :base_locale, :types))
          print_forest forest, opt, :missing_keys
          :exit1 unless forest.empty?
        end

        cmd :translate_missing,
            pos: '[locale ...]',
            desc: t('i18n_tasks.cmd.desc.translate_missing'),
            args: [:locales, :locale_to_translate_from, arg(:out_format).from(1), :translation_backend]

        def translate_missing(opt = {})
          missing    = i18n.missing_diff_forest opt[:locales], opt[:from]
          translated = i18n.translate_forest missing, from: opt[:from], backend: opt[:backend].to_sym
          i18n.data.merge! translated
          log_stderr t('i18n_tasks.translate_missing.translated', count: translated.leaves.count)
          print_forest translated, opt
        end

        cmd :add_missing,
            pos: '[locale ...]',
            desc: t('i18n_tasks.cmd.desc.add_missing'),
            args: [:locales, :out_format, arg(:value) + [{ default: '%{value_or_default_or_human_key}' }],
                   ['--nil-value', 'Set value to nil. Takes precedence over the value argument.']]

        # Merge base locale first, as this may affect the value for the other locales
        def add_missing(opt = {})
          [
            [i18n.base_locale] & opt[:locales],
            opt[:locales] - [i18n.base_locale]
          ].reject(&:empty?).each_with_object(i18n.empty_forest) do |locales, added|
            forest = i18n.missing_keys(locales: locales, **opt.slice(:types, :base_locale))
                         .set_each_value!(opt[:'nil-value'] ? nil : opt[:value])
            i18n.data.merge! forest
            added.merge! forest
          end.tap do |added|
            log_stderr t('i18n_tasks.add_missing.added', count: added.leaves.count)
            print_forest added, opt
          end
        end
      end
    end
  end
end