module Ruport
  class Renderer
    class Invoice < Ruport::Renderer

      include Renderer::Helpers
               
      required_option :customer_info
      required_option :company_info
      required_option :order_info
      required_option :comments

      option :title
      
      stage :invoice_headers
      stage :invoice_body
      stage :invoice_footer
      
      finalize :invoice

      module InvoiceHelpers
        def build_company_header
          @tod = pdf_writer.y
          rounded_text_box(options.company_info) { |o| 
              o.radius    = 3  
              o.width     = options.header_width || 200
              o.height    = options.header_height || 50
              o.font_size = options.header_font_size || 10
              o.y         = pdf_writer.y
              o.x         = pdf_writer.absolute_left_margin + 10
          }
        end

        def build_customer_header
          move_cursor -5
          rounded_text_box(options.customer_info) { |o| 
              o.radius    = 3
              o.width     = options.header_width || 200
              o.height    = options.header_height || 50
              o.font_size = options.header_font_size || 10
              o.y         = pdf_writer.y
              o.x         = pdf_writer.absolute_left_margin + 10
          }
        end

        def build_title
          add_title(options.title) if options.title
        end
        
        def add_title( title )  
          rounded_text_box("<b>#{title}</b>") do |o|
            o.fill_color = Color::RGB::Gray80
            o.radius    = 5  
            o.width     = options.header_width || 200
            o.height    = options.header_height || 20
            o.font_size = options.header_font_size || 11
            o.x         = pdf_writer.absolute_right_margin - o.width 
            o.y         = pdf_writer.absolute_top_margin
          end
        end      

        def build_order_header
          if options.order_info
            rounded_text_box("<b>#{options.order_info}</b>") do |o|
              o.radius    = 5  
              o.heading   = "Billing Information"
              o.width     = options.header_width || 200
              o.height    = options.header_height || 80
              o.font_size = options.header_font_size || 10
              o.x         = pdf_writer.absolute_right_margin - o.width 
              o.y         = pdf_writer.absolute_top_margin - 25
            end 
          end
        end

        def horizontal_line(x1,x2)
          pdf_writer.line(x1,pdf_writer.y,x2,pdf_writer.y)
          pdf_writer.stroke
        end

        def text_box(content,opts={})
            ::PDF::SimpleTable.new do |table| 
            table.data = content.to_a.inject([]) do |s,line|
              s << { "value" => line, }
            end

            table.column_order = "value"
            table.show_headings = false
            table.show_lines  = :outer
            table.shade_rows  = :none
            table.width       = opts[:width] || 200
            table.orientation = opts[:orientation] || :right
            table.position = opts[:position] || :left
            table.font_size = opts[:font_size] || 10
            table.render_on(pdf_writer)
          end    
        end
      end
       
      class PDF < Ruport::Format::PDF
        
        include InvoiceHelpers
        Invoice.add_format self, :pdf

        def build_invoice_headers
          build_company_header
          build_customer_header
          build_title
          build_order_header
        end
        
        def build_invoice_body
         
          pdf_writer.y = 600

          Ruport::Renderer::Table.render_pdf { |r|
            r.data = data
            r.plugin.pdf_writer = pdf_writer
            r.options.table_width = options.body_width || 450
          }

        end

        def build_invoice_footer
         # footer
          pdf_writer.open_object do |footer|
            pdf_writer.save_state
            pdf_writer.stroke_color! Color::RGB::Black
            pdf_writer.stroke_style! ::PDF::Writer::StrokeStyle::DEFAULT
            if options.comments  
              
              move_cursor_to 60

              horizontal_line pdf_writer.absolute_left_margin + 20, 
                              pdf_writer.absolute_right_margin-25

              move_cursor -10 

              add_text(options.comments,:justification => :center, 
                                        :left => 0, :right => 0 )
            end

            pdf_writer.restore_state
            pdf_writer.close_object
            pdf_writer.add_object(footer, :all_pages)
          end
        end

        def finalize_invoice
          output << pdf_writer.render
        end

      end 
    end 
  end  
end

module Ruport::Report::Invoice
  def render_invoice(*args,&block)
    Ruport::Renderer::Invoice.render_pdf(*args,&block)
  end
end