require_relative '../input'
require_relative 'text_input/fix'

module CCS::Components
  module GovUK
    class Field < Base
      class Input < Field
        # = GOV.UK Input
        #
        # This is used for generating the input component from the
        # {https://design-system.service.gov.uk/components/text-input GDS - Components - Text Input}
        #
        # @!attribute [r] field_type
        #   @return [Symbol,String] The input field type
        # @!attribute [r] value
        #   @return [String] The value of the text input
        # @!attribute [r] prefix
        #   @return [Fix] The initialised prefix
        # @!attribute [r] suffix
        #   @return [Fix] The initialised suffix

        class TextInput < Input
          private

          attr_reader :field_type, :value, :prefix, :suffix

          public

          # rubocop:disable Metrics/ParameterLists

          # @param (see CCS::Components::GovUK::Field::Input#initialize)
          # @param field_type [Symbol,String] (:text) the input field type
          # @param value [String] the value if the input
          # @param prefix [Hash] optional prefix for the input field,
          #                      see {CCS::Components::GovUK::Field::Input::TextInput::Fix#initialize Fix#initialize} for more details.
          # @param suffix [Hash] optional suffix for the input field,
          #                      see {CCS::Components::GovUK::Field::Input::TextInput::Fix#initialize Fix#initialize} for more details.
          #
          # @option (see CCS::Components::GovUK::Field::Input#initialize)

          def initialize(attribute:, field_type: :text, value: nil, prefix: nil, suffix: nil, **options)
            super(attribute: attribute, **options)

            @field_type = :"#{field_type}_field"
            @value = @options[:model] ? @options[:model].send(attribute) : value
            @prefix = Fix.new(fix: 'pre', context: @context, **prefix) if prefix
            @suffix = Fix.new(fix: 'suf', context: @context, **suffix) if suffix
          end

          # rubocop:enable Metrics/ParameterLists

          # Generates the HTML for the GOV.UK Text Input component
          #
          # @return [ActiveSupport::SafeBuffer]

          def render
            super() do
              text_input_wrapper do
                if options[:form]
                  options[:form].send(field_type, attribute, **options[:attributes])
                else
                  context.send("#{field_type}_tag", attribute, value, **options[:attributes])
                end
              end
            end
          end

          # The default attributes for the text input

          DEFAULT_ATTRIBUTES = { class: 'govuk-input' }.freeze

          private

          # Wrapper method used by {render} to wrap the text input with a prefix or suffix if they exist
          #
          # @yield the text input HTML
          #
          # @return [ActiveSupport::SafeBuffer]

          def text_input_wrapper
            if prefix || suffix
              tag.div(class: 'govuk-input__wrapper') do
                concat(prefix.render) if prefix
                concat(yield)
                concat(suffix.render) if suffix
              end
            else
              yield
            end
          end
        end
      end
    end
  end
end