require_relative '../../soaspec'
require_relative 'exchange_properties'
require_relative 'exchange_extractor'
require_relative 'request_builder'
require_relative 'exchange_repeater'
require_relative 'variable_storer'

# This represents a request / response pair
# Essentially, params in the exchange that are set are related to the request
# What is returned is related to the response
class Exchange
  extend Soaspec::ExchangeProperties
  include Soaspec::ExchangeExtractor
  include Soaspec::RequestBuilder
  include Soaspec::ExchangeRepeater
  include Soaspec::VariableStorer

  # Instance of ExchangeHandler for which this exchange is made
  attr_accessor :exchange_handler
  # How many times to retry for a success
  attr_accessor :retry_count
  # Name used for displaying class
  attr_accessor :test_name
  # Expect Factory to fail upon trying to create
  attr_writer :fail_factory
  # Parameters to override for default params
  attr_accessor :override_parameters

  # Set retry for success variable to true so that request will be retried
  # for retry_count until it's true
  def retry_for_success
    @retry_for_success = true
    self
  end

  # @return [Bool] Whether to keep making request until success code reached
  def retry_for_success?
    @retry_for_success
  end

  # @return [Boolean] Soaspec::ExchangeHandler used by this exchange
  def default_handler_used
    nil
  end

  # Create new Exchange according to parameters set. A response will be made if called
  # explicitly with 'response' method or through other methods that use it like 'status_code'
  # @param [Symbol, String] name Name shown in RSpec run
  # @param [Hash] override_parameters Parameters to override for default params
  def initialize(name = self.class.to_s, override_parameters = {})
    self.test_name ||= name.to_s
    # As a last resort this uses the global parameter. The handler should be set straight before an exchange is made to use this
    @exchange_handler ||= default_handler_used || Soaspec.api_handler
    raise '@exchange_handler not set. Set either with `Soaspec.api_handler = Handler.new` or within the exchange' unless @exchange_handler

    @fail_factory = nil
    @override_parameters = override_parameters
    @retry_for_success = false
    self.retry_count = 3
    @exchange_handler.elements.each { |element| methods_for_element(element) }
  end

  # Make request to handler with parameters defined
  # Will retry until success code reached if retry_for_success? is set
  # @return [Response] Response from Api handler
  def make_request
    Soaspec::SpecLogger.info 'Example ' + test_name
    request_params = @override_parameters
    (1..retry_count).each do |count|
      response = exchange_handler.make_request(request_params)
      return response unless retry_for_success?
      return response if (200..299).cover? exchange_handler.status_code_for(response)

      sleep 0.5
      break response if count == retry_count
    end
  end

  # Name describing this class when used with `RSpec.describe`
  # This will make the request and store the response
  # @return [String] Name given when initializing
  def to_s
    test_name
  end

  # Returns response object from Api. Will make the request if not made and then cache it for later on
  # @example For SOAP it will be a Savon response
  #   response.body (body of response as Hash)
  #   response.header (head of response as Hash)
  # @example For REST it will be a RestClient::Response
  def response
    Soaspec.last_exchange = self
    @response ||= make_request
    @response.define_singleton_method(:exchange) { Soaspec.last_exchange } unless @response.respond_to?(:exchange)
    @response
  end

  alias call response
end