class SpecMe

# File lib/spec_me.rb, line 15
def initialize
  self.config = SpecMe::Config
end

# File lib/spec_me.rb, line 19
def ast_to_spec
  Renderer.new( config ).render ast, count: 1, file_name: @base_file_name 
end

# File lib/spec_me.rb, line 23
def generate_spec
  return if ast.empty?
  @base_file_name = File
    .basename( file )
    .sub( %r{\..*\z}, "" )
  @output_file = File.join config.spec_me_root, "#{@base_file_name}_spec.rb"

  File.open( @output_file, "w" ) do | f | 
    f.puts ast_to_spec
  end 
end

# File lib/spec_me.rb, line 35
def parse lines
  self.ast = []
  @state = :outside
  lines.each do | line |
    state_machine line.chomp
  end
  # post_parse
end

# File lib/spec_me.rb, line 44
def parse_line line
  case line
  when config.code_comment
    [:comment, Regexp.last_match[1]]
  when config.equality_xp
    [:equality_xp] + Regexp.last_match[1..2].map(&:strip)
  else
    [:ruby, line.strip]
  end
end

# File lib/spec_me.rb, line 55
def post_parse
  # No need to create specs if there are no expectations
end

# File lib/spec_me.rb, line 7
def run args
  file = args.shift or raise ArgumentError, "Missing file name"
  raise ArgumentError, "Input file `#{file}' missing or not readable" unless File.readable? file
  self.file = file
  parse File.readlines( file )
  generate_spec
end

# File lib/spec_me.rb, line 60
def add_block_to_ast
  self.ast << []
end

# File lib/spec_me.rb, line 64
def clean_last_node
  ast.pop unless ast.last.any?{ |node| %r{_xp\z} === node.first }
end

# File lib/spec_me.rb, line 68
def state_machine line
  case @state
  when :outside
    # update_config_from line if config.instruction_line === line
    return unless config.start_code_block === line
    @state = :inside
    add_block_to_ast
  when :inside
    if config.end_code_block === line
      @state = :outside
      clean_last_node
    else
      ast.last << parse_line( line )
    end
  end
end