module PdfDocuments
  class Base
    def initialize(prawn_document, **params)
      @prawn_document = prawn_document
      @prawn_document.markup_options = markup_options
      @prawn_document.font_families.update('Lexend' => {
                                             normal: 'vendor/assets/fonts/Lexend-Light.ttf',
                                             bold: 'vendor/assets/fonts/Lexend-Bold.ttf',
                                             italic: 'vendor/assets/fonts/Lexend-Regular.ttf'
                                           })
      @prawn_document.font 'Lexend'
      @params = OpenStruct.new(params)
    end

    def create
      generate
      @prawn_document
    end

    private

    def generate
      raise NotImplementedError
    end

    def heading1(text)
      @prawn_document.markup "<h1><u>#{text}</u></h1>"
    end

    def heading2(text)
      @prawn_document.markup "<h2>#{text}</h2>"
    end

    def heading2(text)
      @prawn_document.markup "<h3>#{text}</h3>"
    end

    def text(text)
      @prawn_document.text text, markup_options[:text]
    end

    def rich_text(text)
      @prawn_document.markup prepare_rich_text(text)
    end

    def markup_options
      {
        text: { size: 10, margin_bottom: 10 },
        heading1: { style: :bold, size: 24, margin_bottom: 10, margin_top: 20 },
        heading2: { style: :bold, size: 18, margin_bottom: 10, margin_top: 15 },
        heading3: { style: :bold, size: 16, margin_bottom: 10, margin_top: 10 },
        heading4: { style: :bold, size: 14, margin_bottom: 10, margin_top: 5 },
        heading5: { style: :bold, size: 14, margin_bottom: 10, margin_top: 5 },
        heading6: { style: :thin, size: 14, margin_bottom: 10, margin_top: 5 }
      }
    end

    def prepare_rich_text(rich_text)
      { h1: 'h4' }.each do |tag, replacement|
        rich_text = rich_text.to_s.gsub("<#{tag}", "<#{replacement}")
        rich_text = rich_text.to_s.gsub("</#{tag}>", "</#{replacement}>")
      end

      rich_text
    end
  end
end