# frozen_string_literal: true

require 'rspec/rails/api/entity_config'
require 'rspec/rails/api/validator'

module RSpec
  module Rails
    module Api
      # Represents an entity field configuration.
      # A field have some options and a method to serialize itself.
      class FieldConfig
        attr_accessor :required, :type, :attributes, :description

        def initialize(type:, description:, required: true, attributes: nil, of: nil) # rubocop:disable Metrics/CyclomaticComplexity
          @required    = required
          @description = description

          raise "Field type not allowed: '#{type}'" unless Validator.valid_type?(type)
          raise "Don't use 'of' on non-arrays" if of && type != :array
          raise "Don't use 'attributes' on non-objects" if attributes && type != :object

          define_attributes attributes if type == :object
          define_attributes of if type == :array

          @type = type
        end

        ##
        # @return [Hash] Field configuration
        def to_h
          out               = { required: @required, type: @type }
          out[:description] = @description unless @description.nil?

          if %i[object array].include?(@type) && @attributes
            out[:attributes] = if @attributes.is_a? EntityConfig
                                 @attributes.to_h
                               elsif attributes.is_a? Symbol
                                 @attributes
                               end
          end

          out
        end

        private

        ##
        # Sets @attributes of the field when it's an Array or Hash
        #
        # @param attributes [Hash, Symbol] The attributes definition or reference
        #
        # @return [void]
        def define_attributes(attributes)
          @attributes = case attributes
                        when Hash
                          EntityConfig.new attributes
                        when Symbol
                          attributes
                        end
        end
      end
    end
  end
end