# frozen_string_literal: true

require_relative "unary_function"

module Plurimath
  module Math
    module Function
      class Bar < UnaryFunction
        attr_accessor :attributes

        def initialize(parameter_one = nil, attributes = {})
          super(parameter_one)
          @attributes = attributes
        end

        def to_asciimath
          first_value = "(#{parameter_one.to_asciimath})" if parameter_one
          "bar#{first_value}"
        end

        def to_latex
          first_value = "{#{parameter_one.to_latex}}" if parameter_one
          "\\overline#{first_value}"
        end

        def to_mathml_without_math_tag
          mo_tag = Utility.ox_element("mo") << "&#xaf;"
          return mo_tag unless parameter_one

          mover_tag = Utility.ox_element("mover")
          mover_tag.attributes.merge!(attributes) if attributes && !attributes.empty?
          Utility.update_nodes(
            mover_tag,
            [
              parameter_one&.to_mathml_without_math_tag,
              mo_tag,
            ],
          )
        end

        def to_omml_without_math_tag(display_style)
          return r_element("&#xaf;", rpr_tag: false) unless parameter_one

          attributes && attributes[:accent] ? acc_tag(display_style) : bar_tag(display_style)
        end

        def swap_class
          Ul.new(parameter_one, attributes)
        end

        protected

        def acc_tag(display_style)
          acc = Utility.ox_element("acc", namespace: "m")
          chr = Utility.ox_element("chr", namespace: "m", attributes: { "m:val": "‾" } )
          acc_pr = (Utility.ox_element("accPr", namespace: "m") << chr)
          Utility.update_nodes(
            acc,
            [
              acc_pr,
              omml_parameter(parameter_one, display_style, tag_name: "e"),
            ],
          )
          [acc]
        end

        def bar_tag(display_style)
          bar = Utility.ox_element("bar", namespace: "m")
          Utility.update_nodes(
            bar,
            [
              bar_pr,
              omml_parameter(parameter_one, display_style, tag_name: "e", namespace: "m"),
            ],
          )
          [bar]
        end

        def bar_pr
          attrs = { "m:val": "top" }
          barpr = Utility.ox_element("barPr", namespace: "m")
          pos   = Utility.ox_element("pos", namespace: "m", attributes: attrs)
          ctrlp = Utility.pr_element("ctrl", true, namespace: "m")
          Utility.update_nodes(barpr, [pos, ctrlp])
        end
      end
    end
  end
end