module Ecoportal
  module API
    class V2
      class Page
        class Component
          class SelectionField < Page::Component
            passthrough :multiple, :flat
            passthrough :other, :other_desc

            #class_resolver :selection_option_class, "Ecoportal::API::V2::Page::Component::SelectionOption"
            embeds_multiple :options, klass: "Ecoportal::API::V2::Page::Component::SelectionOption", order_key: :weight

            def select(value)
              opt = options.find {|opt| opt.value == value}
              sel = selected
              return true if !multiple && opt == sel
              sel.selected = false if !multiple && sel
              opt.selected = true unless !opt
            end

            def selected
              if multiple
                options.select {|opt| opt.selected}
              else
                options.find {|opt| opt.selected}
              end
            end

            def value
              if multiple
                selected.map {|opt| opt.value}
              else
                selected&.value
              end
            end

            def add_option(name:, value:, pos: NOT_USED, before: NOT_USED, after: NOT_USED)
              opt_doc = Ecoportal::API::V2::Page::Component::SelectionOption.new_doc
              options.upsert!(opt_doc, pos: pos, before: before, after: after) do |option|
                option.name  = name
                option.value = value
                if prev = previous_option(option)
                  option.weight = prev.weight
                end
                yield(option) if block_given?
                fix_option_weights!
              end
            end

            def ordered_options
              options.each_with_index.sort_by do |option, index|
                (option.weight >= 9999) ? [index, index] : [option.weight, index]
              end.map(&:first)
            end

            private

            def fix_option_weights!
              ordered_options.each_with_index do |option, index|
                option.weight = index
              end
            end

            def previous_option(value)
              opts = ordered_options
              pos  = opts.index(value) - 1
              return if pos < 0
              opts[pos]
            end


          end
        end
      end
    end
  end
end

require 'ecoportal/api/v2/page/component/selection_option'