module Schofield
  
  module Generators
    
    class Attribute
    
      ATTACHMENT_IMAGE_NAMES = %w( image thumbnail enlargement photo avatar )
  
      attr_reader :model_name, :name, :max_number, :max_length, :attachment_name, :type
  
  
      def initialize column
    
        if (match_data = column.name.match(/(.+)_file_name$/))
          @attachment_name = match_data[1]
          @attachment      = true
          @image           = @attachment_name =~ /#{ATTACHMENT_IMAGE_NAMES.join('|')}/
        end
    
        if (match_data = column.name.match(/^(.+)_id$/))
          @reference = true
          @model_name = match_data[1]
        end
    
        @name        = column.name
        @required    = !column.null
        @type        = column.type
        @max_length  = column.type == :string ? column.limit : nil
        @max_number  = column.type == :integer && !@reference ? 256**column.limit / 2 - 1 : nil
    
      end
  
      def reference?
        @reference == true
      end
  
      def attachment?
        @attachment == true
      end
      
      def image?
        @image == 0
      end
  
      def required?
        @required && !@attachment
      end
  
      def required_attachment?
        @attachment && @required
      end
      
      def text?
        type == :text
      end
      
      def boolean?
        type == :boolean
      end
      
      def actual_name
        @attachment_name || @model_name || @name
      end
        
      def to_column
        case
        when image?       then "'#{actual_name.humanize} ', lambda { |x| image_tag(x.#{@attachment_name}.url(:thumbnail), :alt => '', :class => 'thumbnail') }"
        when attachment?  then "link_to('#{actual_name.humanize}', x.#{@attachment_name}.url)"
        else                   "'#{actual_name.humanize}', lambda { |x| x.#{actual_name} }"
        end
      end
  
    end
    
  end
end