require "parallel_tests/test/runner"
require 'shellwords'

module ParallelTests
  module Gherkin
    class Runner < ParallelTests::Test::Runner

      class << self
        def run_tests(test_files, process_number, num_processes, options)
          combined_scenarios = test_files

          if options[:group_by] == :scenarios
            grouped = test_files.map { |t| t.split(':') }.group_by(&:first)
            combined_scenarios = grouped.map {|file,files_and_lines| "#{file}:#{files_and_lines.map(&:last).join(':')}" }
          end

          sanitized_test_files = combined_scenarios.map { |val| WINDOWS ? "\"#{val}\"" : Shellwords.escape(val) }

          options[:env] ||= {}
          options[:env] = options[:env].merge({'AUTOTEST' => '1'}) if $stdout.tty? # display color when we are in a terminal

          cmd = [
            executable,
            (runtime_logging if File.directory?(File.dirname(runtime_log))),
            cucumber_opts(options[:test_options]),
            *sanitized_test_files
          ].compact.reject(&:empty?).join(' ')
          execute_command(cmd, process_number, num_processes, options)
        end

        def test_file_name
          @test_file_name || 'feature'
        end

        def test_suffix
          /\.feature$/
        end

        def line_is_result?(line)
          line =~ /^\d+ (steps?|scenarios?)/
        end

        # cucumber has 2 result lines per test run, that cannot be added
        # 1 scenario (1 failed)
        # 1 step (1 failed)
        def summarize_results(results)
          sort_order = %w[scenario step failed undefined skipped pending passed]

          %w[scenario step].map do |group|
            group_results = results.grep(/^\d+ #{group}/)
            next if group_results.empty?

            sums = sum_up_results(group_results)
            sums = sums.sort_by { |word, _| sort_order.index(word) || 999 }
            sums.map! do |word, number|
              plural = "s" if word == group and number != 1
              "#{number} #{word}#{plural}"
            end
            "#{sums[0]} (#{sums[1..-1].join(", ")})"
          end.compact.join("\n")
        end

        def cucumber_opts(given)
          if given =~ /--profile/ or given =~ /(^|\s)-p /
            given
          else
            [given, profile_from_config].compact.join(" ")
          end
        end

        def profile_from_config
          # copied from https://github.com/cucumber/cucumber/blob/master/lib/cucumber/cli/profile_loader.rb#L85
          config = Dir.glob("{,.config/,config/}#{name}{.yml,.yaml}").first
          if config && File.read(config) =~ /^parallel:/
            "--profile parallel"
          end
        end

        def tests_in_groups(tests, num_groups, options={})
          if options[:group_by] == :scenarios
            @test_file_name = "scenario"
          end
          method = "by_#{options[:group_by]}"
          if Grouper.respond_to?(method)
            Grouper.send(method, find_tests(tests, options), num_groups, options)
          else
            super
          end
        end


        def runtime_logging
          "--format ParallelTests::Gherkin::RuntimeLogger --out #{runtime_log}"
        end

        def runtime_log
          "tmp/parallel_runtime_#{name}.log"
        end

        def determine_executable
          case
          when File.exist?("bin/#{name}")
            ParallelTests.with_ruby_binary("bin/#{name}")
          when ParallelTests.bundler_enabled?
            "bundle exec #{name}"
          when File.file?("script/#{name}")
            ParallelTests.with_ruby_binary("script/#{name}")
          else
            "#{name}"
          end
        end

      end
    end
  end
end