class MicrosoftGraph
  class Base

    def initialize(options = {})
      @cached_navigation_property_values = {}
      @cached_property_values            = {}
      if options[:attributes]
        initialize_serialized_properties(options[:attributes], options[:persisted])
      end
      @dirty = ! options[:persisted]
      @dirty_properties = if @dirty
        @cached_property_values.keys.inject({}) do |result, key|
          result[key] = true
          result
        end
      else
        {}
      end
    end

    def properties
      {}
    end

    def odata_type
      self.class.const_get("ODATA_TYPE").name
    end

    def as_json(options = {})
      (if options[:only]
        @cached_property_values.select { |key,v| options[:only].include? key }
      elsif options[:except]
        @cached_property_values.reject { |key,v| options[:except].include? key }
      else
        @cached_property_values
      end).inject({}) do |result, (k,v)|
        k = OData.convert_to_camel_case(k) if options[:convert_to_camel_case]
        result[k.to_s] = v.respond_to?(:as_json) ? v.as_json(options) : v
        result
      end
    end

    def to_json(options = {})
      as_json(options).to_json
    end

    def dirty?
      @dirty || @cached_property_values.any? { |key, value|
        value.respond_to?(:dirty?) && value.dirty?
      }
    end

    def mark_clean
      @dirty = false
      @dirty_properties = {}
      @cached_property_values.each { |key, value|
        value.respond_to?(:mark_clean) && value.mark_clean
      }
    end

    private

    def get(property_name)
      if properties[property_name].collection?
        @cached_property_values[property_name] ||= Collection.new(properties[property_name].type)
      else
        @cached_property_values[property_name]
      end
    end

    def set(property_name, value)
      property = properties[property_name]

      raise NonNullableError unless property.nullable_match?(value)
      if property.collection?
        raise TypeError unless value.all? { |v| property.collection_type_match?(v) }
        @cached_property_values[property_name] = Collection.new(property.type, value)
      else
        raise TypeError unless property.type_match?(value)
        @cached_property_values[property_name] = property.coerce_to_type(value)
      end
      @dirty = true
      @dirty_properties[property_name] = true
    end

    def initialize_serialized_properties(raw_attributes, from_server = false)
      unless raw_attributes.respond_to? :keys
        raise TypeError.new("Cannot initialize #{self.class} with attributes: #{raw_attributes.inspect}")
      end
      attributes = OData.convert_keys_to_snake_case(raw_attributes)
      properties.each do |property_key, property|
        if attributes.keys.include?(property_key.to_s)
          value = attributes[property_key.to_s]
          @cached_property_values[property_key] =
            if property.collection?
              Collection.new(property.type, value)
            elsif klass = MicrosoftGraph::ClassBuilder.get_namespaced_class(property.type.name)
              klass.new(attributes: value)
            else
              if from_server && ! property.type_match?(value) && OData::EnumType === property.type
                value.to_s
              else
                property.coerce_to_type(value)
              end
            end
        end
      end
    end
  end
end