RSpec::Support.require_rspec_core "formatters/base_text_formatter"
RSpec::Support.require_rspec_core "formatters/console_codes"

module RSpec
  module Core
    module Formatters
      # @private
      class DocumentationFormatter < BaseTextFormatter
        Formatters.register self, :example_started, :example_group_started, :example_group_finished,
                            :example_passed, :example_pending, :example_failed

        def initialize(output)
          super
          @group_level = 0

          @example_running = false
          @messages = []
        end

        def example_started(_notification)
          @example_running = true
        end

        def example_group_started(notification)
          output.puts if @group_level == 0
          output.puts "#{current_indentation}#{notification.group.description.strip}"

          @group_level += 1
        end

        def example_group_finished(_notification)
          @group_level -= 1 if @group_level > 0
        end

        def example_passed(passed)
          output.puts passed_output(passed.example)

          flush_messages
          @example_running = false
        end

        def example_pending(pending)
          output.puts pending_output(pending.example,
                                     pending.example.execution_result.pending_message)

          flush_messages
          @example_running = false
        end

        def example_failed(failure)
          output.puts failure_output(failure.example)

          flush_messages
          @example_running = false
        end

        def message(notification)
          if @example_running
            @messages << notification.message
          else
            output.puts "#{current_indentation}#{notification.message}"
          end
        end

      private

        def flush_messages
          @messages.each do |message|
            output.puts "#{current_indentation(1)}#{message}"
          end

          @messages.clear
        end

        def passed_output(example)
          ConsoleCodes.wrap("#{current_indentation}#{example.description.strip}", :success)
        end

        def pending_output(example, message)
          ConsoleCodes.wrap("#{current_indentation}#{example.description.strip} " \
                            "(PENDING: #{message})",
                            :pending)
        end

        def failure_output(example)
          ConsoleCodes.wrap("#{current_indentation}#{example.description.strip} " \
                            "(FAILED - #{next_failure_index})",
                            :failure)
        end

        def next_failure_index
          @next_failure_index ||= 0
          @next_failure_index += 1
        end

        def current_indentation(offset=0)
          '  ' * (@group_level + offset)
        end
      end
    end
  end
end