require 'fileutils'
require 'cucumber/rake/task'
 
module Henry
  
  class Task
    
    # The Henry Task implementation for Cucumber
    class CucumberTask < RakeTask

      attr_accessor :generated_reports, :report_recipients
      
      # The temporary output file path for the RspecTask execution.
      OUT_PATH = 'cucumber.out'

      # The reports path template.
      REPORTS_DIR = '.henry/reports/${FORMAT}'
      
      # Default time format to be used in the reports filepath.
      TIME_FORMAT = '%Y-%m-%dT%H%M%S'
        
      # The Cucumber Rake Application name.
      #
      # @return [String] the rake application name.
      APPLICATION_NAME = 'cucumber'

      def application_name
        APPLICATION_NAME
      end

      def out_path
        OUT_PATH
      end

      def after_execute
        if !(self.generated_reports || []).empty? && !(self.report_recipients || []).empty?
          tgz_path = ".henry/#{DateTime.now.strftime(TIME_FORMAT)}_#{self.name}.tgz"
         
          `tar czf "#{tgz_path}" "#{self.generated_reports.join('" "')}"`

          Henry::EmailClient.send_file(tgz_path, self.report_recipients.uniq, "[Henry Reports] #{self.name}")

          `rm "#{tgz_path}"`
        end

        super
      end

      # Configures the Task.
      #
      # @param [Hash] params the task params.
      # @param [Hash] extended_context task extended context.
      def configure(params, extended_context={})
        File.open(OUT_PATH, 'w') { |f| }

        # Makes available the cucumber rake task.
        Rake.application.clear
        Cucumber::Rake::Task.new do |t|
          if self.data.options
            t.cucumber_opts = "#{self.custom_options} #{extended_context['options']}"
          else
            t.cucumber_opts = "#{self.default_options} #{extended_context['options']}"
          end
        end
        
        super
      end
      
      # Returns the custom cucumber_opts that user may have passed.
      #
      # @return [String]
      def custom_options
        "#{self.format_options} #{self.tags_options} #{self.report_options} #{self.rerun_options} #{self.misc_options}" 
      end
      
      # Returns the miscellaneous cucumber_opts.
      #
      # @return [String]
      def misc_options
        "#{self.data.options['expand'] ? '--expand' : ''} #{self.data.options['pattern'] ? "--require features #{self.data.options['pattern']}" : ''}"
      end
      
      # Returns the default cucumber_opts.
      #
      # @return [String]
      def default_options
        "--format pretty --format pretty --out #{OUT_PATH}"
      end
      
      # Returns the cucumber_opts related with formatting.
      #
      # @return [String]
      def format_options
        "--format #{self.data.options['format'] || 'pretty'} --format #{self.data.options['format'] || 'pretty'} --out #{OUT_PATH}"
      end
      
      # Returns the cucumber_opts related with tags to be run.
      #
      # @return [String]
      def tags_options
        return '' if self.data.options['tags'].nil?

        self.data.options['tags'].collect do |tag|
          "--tags #{tag.gsub(/(,?~?)(\w+)/, '\1@\2')}"
        end.join(' ')
      end
      
      # Returns the cucumber_opts related with report paaths and formats.
      #
      # @return [String]
      def report_options
        self.generated_reports = []
        self.report_recipients = []

        return '' if self.data.reports.nil?

        self.data.reports.collect do |report_options|
          report_options['name'] ||= "${DATE}_${TASK_NAME}.#{report_options['format']}"

          self.generated_reports << self.report_file_path(report_options['format'], report_options['name'])
          self.report_recipients += (report_options['recipients'] || [])

          FileUtils.mkdir_p(self.reports_dir(report_options['format']))

          "--format #{report_options['format']} --out #{self.report_file_path(report_options['format'], report_options['name'])}"
        end.join(' ')
      end

      # Returns the cucumber_opts related with the rerun usage.
      #
      # @return [String]
      def rerun_options
        return ''

        return ''  if self.data.options['rerun'].nil?
        
        self.data.options['rerun'] -= 1

        "---format rerun --out tmp/rerun"
      end
      
      # Returns true whenever rerun is set and the reties counter is still positive.
      #
      # @return [True,False]
      def rerun?
        self.data.options['rerun'] && self.data.options['rerun'] >= 0
      end

      # Returns the report file path for the given format and file name.
      #
      # @param [String] format the rspec formatter name.
      # @param [String] file_name the report file name template.
      # @return [String] the report file path.
      def report_file_path(format, file_name)
        "#{self.reports_dir(format)}/#{self.report_file_name(file_name)}"
      end

      # Interpolates and returns the report file name.
      #
      # @param [String] file_name the report file name.
      # @returns [String] the report file name.
      def report_file_name(file_name)
        file_name.gsub(/\${[A-Z_]+}/, '${TASK_NAME}' => self.name, '${DATE}' => DateTime.now.strftime(TIME_FORMAT)).gsub(' ', '_')
      end

      # Interpolates and returns the reports directory for the given format.
      #
      # @param [String] format the formatter name.
      # @return [Stiring] the reports directory.
      def reports_dir(format)
        REPORTS_DIR.gsub(/\${[A-Z_]+}/, '${FORMAT}' => format).gsub(' ', '_')
      end

    end

  end

end