# typed: true
# frozen_string_literal: true

require "forwardable"

module RuboCop
  module Cop
    module Cask
      # This cop checks that a cask's stanzas are ordered correctly.
      # @see https://docs.brew.sh/Cask-Cookbook#stanza-order
      class StanzaOrder < Base
        extend Forwardable
        extend AutoCorrector
        include CaskHelp

        MESSAGE = "`%<stanza>s` stanza out of order"

        def on_cask(cask_block)
          @cask_block = cask_block
          add_offenses
        end

        private

        attr_reader :cask_block

        def_delegators :cask_block, :cask_node, :toplevel_stanzas,
                       :sorted_toplevel_stanzas

        def add_offenses
          offending_stanzas.each do |stanza|
            message = format(MESSAGE, stanza: stanza.stanza_name)
            add_offense(stanza.source_range_with_comments, message: message) do |corrector|
              correct_stanza_index = toplevel_stanzas.index(stanza)
              correct_stanza = sorted_toplevel_stanzas[correct_stanza_index]
              corrector.replace(stanza.source_range_with_comments,
                                correct_stanza.source_with_comments)
            end
          end
        end

        def offending_stanzas
          stanza_pairs = toplevel_stanzas.zip(sorted_toplevel_stanzas)
          stanza_pairs.each_with_object([]) do |stanza_pair, offending_stanzas|
            stanza, sorted_stanza = *stanza_pair
            offending_stanzas << stanza unless stanza == sorted_stanza
          end
        end
      end
    end
  end
end