# frozen_string_literal: true

module Nanoc
  module Core
    module CoreExt
      module HashExtensions
        # Returns a new hash where all keys are recursively converted to symbols by
        # calling {Nanoc::ArrayExtensions#__nanoc_symbolize_keys_recursively} or
        # {Nanoc::HashExtensions#__nanoc_symbolize_keys_recursively}.
        #
        # @return [Hash] The converted hash
        def __nanoc_symbolize_keys_recursively
          hash = {}
          each_pair do |key, value|
            new_key   = key.respond_to?(:to_sym) ? key.to_sym : key
            new_value = value.respond_to?(:__nanoc_symbolize_keys_recursively) ? value.__nanoc_symbolize_keys_recursively : value
            hash[new_key] = new_value
          end
          hash
        end

        def __nanoc_stringify_keys_recursively
          hash = {}
          each_pair do |key, value|
            new_key   = key.is_a?(Symbol) ? key.to_s : key
            new_value = value.respond_to?(:__nanoc_stringify_keys_recursively) ? value.__nanoc_stringify_keys_recursively : value
            hash[new_key] = new_value
          end
          hash
        end

        # Freezes the contents of the hash, as well as all hash values. The hash
        # values will be frozen using {#__nanoc_freeze_recursively} if they respond to
        # that message, or #freeze if they do not.
        #
        # @see Array#__nanoc_freeze_recursively
        #
        # @return [void]
        def __nanoc_freeze_recursively
          return if frozen?

          freeze
          each_pair do |_key, value|
            if value.respond_to?(:__nanoc_freeze_recursively)
              value.__nanoc_freeze_recursively
            else
              value.freeze
            end
          end
        end
      end
    end
  end
end

class Hash
  include Nanoc::Core::CoreExt::HashExtensions
end
