module ActiveScaffoldSignaturepad
  module ViewHelpers
    ATTRIBUTES = [:line_colour, :line_width, :line_margin, :line_top, :bg_colour, :pen_colour, :pen_width, :pen_cap, :display_only, :error_message_draw]
    def signaturepad_attributes(column)
      attributes = ATTRIBUTES.map{ |attr| [attr, column.options[attr]] if column.options[attr] }
      attributes = Hash[attributes].reverse_merge(:error_message_draw => :sign_document)
      attributes[:type] = column.options[:type] if column.options[:type]
      attributes[:error_message_draw] = as_(attributes[:error_message_draw]) if attributes[:error_message_draw].is_a? Symbol
      attributes
    end

    def active_scaffold_input_signaturepad(column, html_options)
      content_tag(:div, :class => "sigPad #{html_options[:class]}", :data => signaturepad_attributes(column)) do
        content_tag(:ul, :class => 'sigNav') do
          if column.options[:type]
            content_tag(:li, link_to(as_(:type_it), '#type-it'), :class => 'typeIt') <<
            content_tag(:li, link_to(as_(:draw_it), '#draw-it'), :class => 'drawIt')
          else
            ''.html_safe
          end <<
          content_tag(:li, link_to(as_(:clear), '#clear'), :class => 'clearButton')
        end <<
        content_tag(:div, :class => 'sig sigWrapper') do
          (column.options[:type] ? content_tag(:div, '', :class => 'typed') : ''.html_safe) <<
          content_tag(:canvas, '', :width => column.options[:width] || 250, :height => column.options[:height] || 100) <<
          hidden_field(:record, column.name, html_options.merge(:class => 'output'))
        end
      end
    end

    def active_scaffold_column_signaturepad(record, column)
      content_tag :div, :class => 'sigPad', :data => signaturepad_attributes(column).merge(:display_only => true, :signature => record.send(column.name)) do
        content_tag :div, :class => 'sigWrapper' do
          content_tag :canvas, '', :width => column.options[:width] || 250, :height => column.options[:height] || 100
        end
      end
    end
    alias_method :active_scaffold_show_signaturepad, :active_scaffold_column_signaturepad

    def self.json_attributes
      ATTRIBUTES.map { |attr| attr.to_s.camelize(:lower) }.to_json.html_safe
    end
  end
end