# frozen_string_literal: true

module DrawioDsl
  # The layout engine is responsible for laying out the elements on the page.
  #
  # The layout engine can automatically place elements on the page.
  #
  # It will keep track of layout boundaries, current position and flow direction.
  # Elements will be placed on the page in the order they are added.
  # Row/column flow objects will hold information about horizontal and vertical element padding
  class LayoutEngine
    attr_reader :page

    attr_reader :current_page
    attr_reader :current_layout

    # attr_reader :page_margin_top
    # attr_reader :page_margin_left
    # attr_reader :x
    # attr_reader :y

    def initialize(page)
      @page = page
      # @x = 0
      # @y = 0
    end

    def call
      page.position_x = page.margin_left
      page.position_y = page.margin_top

      page.nodes.each do |node|
        case node.classification
        when :layout_rule
          @current_layout = node
        when :shape
          current_layout&.position_shape(node)
        end
        # node.debug(format: :row)
      end
    end
  end
end