class CSSLite

# File lib/csslite.rb, line 11
def initialize(s, debug: false, override: false)
  
  @debug, @override = debug, override

  # parse the CSS
  
  @a = s.strip.split(/}/).map do |entry|

    raw_selector,raw_styles = entry.split(/{/,2)

    h = raw_styles.strip.split(/;/).inject({}) do |r, x| 
      k, v = x.split(/:/,2).map(&:strip)
      r.merge(k.to_sym => v)
    end

    [raw_selector.split(/,\s*/).map(&:strip), h]
  end
  
  puts '@a: ' + @a.inspect if @debug    
  
end

# File lib/csslite.rb, line 33
def propagate(root_element)
  
  puts 'inside csslist#propagate'.info if @debug
  
  # add each CSS style attribute to the element
  # e.g. @a = [[['line'],{stroke: 'green'}]]

  @a.each do |x|

    selectors, style = x

    selectors.each do |selector|

      puts 'root_element: ' + root_element.inspect if @debug
      root_element.css(selector).each do |element|
        puts 'element: ' + element.inspect if @debug
        apply_style element, style
        
        # apply the CSS to all its children
        element.each_recursive {|x| apply_style x, style}
      end

    end
  end

end

# File lib/csslite.rb, line 62
def apply_style(e, new_h)
  
  h = e.style.to_h
  puts 'h: '  + h.inspect if @debug

  puts 'new_h: '  + new_h.inspect if @debug
  h2 = @override ? h.merge(new_h) :  new_h.merge(h)
  
  puts 'after h: '  + h.inspect if @debug
  e.attributes[:style] = h2.map{|x| x.join(':') }.join(';')
  
  a = (h2 .to_a - e.style.to_h.to_a )
  puts 'a: ' + a.inspect if @debug
  
  a.each do |key, value|
    name = (key.to_s + '=').to_sym      
    puts 'name: ' + name.inspect if @debug
    puts 'value: ' + value.inspect if @debug
    e.method(name).call(value) if e.respond_to? name
  end
  
end