module Compony
  module ModelFields
    class Anchormodel < Base
      # Takes an array of objects implementing the methods `label` and `key` and returns an array suitable for simple_form select fields.
      def self.collect(flat_array, label_method: :label, key_method: :key)
        return flat_array.map { |entry| [entry.send(label_method), entry.send(key_method)] }
      end

      def value_for(data, controller: nil, **_)
        return transform_and_join(data.send(@name), controller:, &:label)
      end

      def simpleform_input(form, _component, **input_opts)
        selected_cst = form.object.send(@name)
        anchormodel_attribute = @model_class.anchormodel_attributes[@name]
        anchormodel_class = anchormodel_attribute.anchormodel_class
        opts = {
          collection:    self.class.collect(anchormodel_class.all),
          label_method:  :first,
          value_method:  :second,
          selected:      selected_cst&.key || anchormodel_class.all.first,
          include_blank: anchormodel_attribute.optional
        }.merge(input_opts)
        return form.input @name, **opts
      end
    end
  end
end