class OasRails::Builders::RequestBodyBuilder

def build
  return {} if @request_body.content == {}
  @request_body
end

def detect_request_body(oas_route)
  return unless (klass = Utils.find_model_from_route(oas_route.controller))
  from_model_class(klass:, required: true)
end

def from_model_class(klass:, **kwargs)
  @request_body.description = kwargs[:description] || klass.to_s
  @request_body.content = ContentBuilder.new(@specification, :incoming).from_model_class(klass).with_examples_from_tags(kwargs[:examples_tags] || {}).build
  @request_body.required = kwargs[:required]
  self
end

def from_oas_route(oas_route)
  tag_request_body = oas_route.docstring.tags(:request_body).first
  if tag_request_body.nil? && OasRails.config.autodiscover_request_body
    detect_request_body(oas_route) if %w[create update].include? oas_route.method
  elsif !tag_request_body.nil?
    from_tags(tag: tag_request_body, examples_tags: oas_route.docstring.tags(:request_body_example))
  end
  self
end

def from_tags(tag:, examples_tags: [])
  if tag.klass.ancestors.include? ActiveRecord::Base
    from_model_class(klass: tag.klass, description: tag.text, required: tag.required, examples_tags:)
  else
    @request_body.description = tag.text
    @request_body.content = ContentBuilder.new(@specification, :incoming).with_schema(tag.schema).with_examples_from_tags(examples_tags).build
    @request_body.required = tag.required
  end
  self
end

def initialize(specification)
  @specification = specification
  @request_body = Spec::RequestBody.new(specification)
end

def reference
  return {} if @request_body.content == {}
  @specification.components.add_request_body(@request_body)
end