require 'quarry/markup/step'
require 'quarry/markup/header'
require 'quarry/markup/comment'
require 'quarry/markup/macro'
require 'quarry/markup/before'
require 'quarry/markup/after'
require 'quarry/markup/table'

module Quarry

  # = Specification Markup
  #
  class Markup

    attr :file
    attr :steps

    #
    def initialize(file)
      @file  = file
      @steps = []
      parse
    end

    #
    def parse
      lineno = 0
      text   = ''
      File.open(file, 'r') do |f|
        f.readlines.each_with_index do |line, lineno|
          case line
          when /^\s*$/
            parse_section(text, lineno)
            text = ''
          else
            text << line
          end
        end
      end
    end

    #
    def parse_section(text, lineno)
      return if text.strip == ''
      case text
      when /\A[-=].*?$/, /[-=]\s*\Z/
        #text << line
        steps << Header.new(self, text, lineno)
      when /^\s+/
        case last = steps.last
        when Step, Macro
          last.code << "\n\n#{text.rstrip}"
        when Comment
          if last.text =~ /\A([A-Z]{1,9})[:]/
          #if macro = Macro.types.find{ |m| m.match?(last.text) }
            type = Markup.const_get($1.capitalize)
            step = type.new(self, text, lineno, :comment=>last.text, :before=>@before, :after=>@after)
            case step
            when Before
              @before = step
            when After
              @after  = step
            end
            steps << step
          else
            steps << Step.new(self, text, lineno, :before=>@before, :after=>@after)
          end
        else
          raise "never here"
          steps << Step.new(self, text, lineno, :before=>@before, :after=>@after)
        end
      else
        steps << Comment.new(self, text, lineno)
      end
    end

    #
    def description
      File.basename(file)
    end

    #
    def to_script
      script = []
      Dir.chdir(File.dirname(file)) do
        steps.each do |step|
          script << step.to_script
        end
      end
      script.join("\n\n")
    end

  end #class Markup

end#module Quarry