require 'http/rest_client'
require 'ostruct'

module Fluxx
  # Base endpoint resources class
  class Resource < OpenStruct
    extend HTTP::RestClient::DSL
    extend HTTP::RestClient::CRUD

    PAGINATION_FIELDS = [
      'total_pages',
      'total_entries',
      'current_page',
      'per_page'
    ]

    endpoint ENV['FLUXX_INSTANCE_URL']
    content_type 'application/json'

    # Defines the client endpoint. Thread-safe.
    #
    # @param value [String] the endpoint URI.
    # @return [String]
    def endpoint(value = nil)
      return super(value) unless value.nil?

      Thread.current.thread_variable_get(:FLUXX_INSTANCE_URL) || super
    end

    # Updated request handler with the auto-refreshing token authentication
    #
    # @param payload [Hash] request payload.
    # @return [HTTP::Response] instance.
    def self.request(*args)
      auth("Bearer #{Token.fresh.access_token}") unless self == Token
      super(*args)
    end

    # Resource constructor wrapper
    #
    # @param payload [Hash] response payload to build a resource.
    # @return [Object] instance or a list of instances.
    def self.objectify(payload)
      filtered = payload.reject { |key, _| PAGINATION_FIELDS.include?(key) }
      data = filtered.values.first if filtered.is_a?(Hash) && filtered.size == 1
      data = data.values.first if data.is_a?(Hash) && data.size == 1

      super(data || payload)
    end
  end
end