require 'graphlient'
module Ecoportal
  module API
    module Common
      module GraphQL
        module AuthService
          DEFAULT_SERVER = "live.ecoportal.com"

          module InstanceMethods
            def session_token(host: server, version: nil)
              http_client(host: host, version: version).post("/oauth/token", data: {
                "grant_type" => "password",
                "email"      => user_email,
                "password"   => user_pass
              }).yield_self do |response|
                if response.success?
                  response.body["access_token"]
                end
              end
            end

            private

            def http_client(host: server, version: nil)
              @http_client ||= Ecoportal::API::Common::GraphQL::HttpClient.new(host: host, version: version)
            end

            def user_email
              fetch_env_required("USER_EMAIL")
            end

            def user_pass
              fetch_env_required("USER_PASS")
            end

            def server(default = DEFAULT_SERVER)
              ENV['SERVER'] || default
            end

            def fetch_env_required(name)
              abort("Missing ENV '#{name}'") unless ENV.key?(name)
              ENV[name]
            end

            def abort(msg)
              puts msg
              exit(1)
            end
          end

          module ClassMethods
          end

          class << self
            include InstanceMethods

            def included(base)
              base.send(:include, InstanceMethods)
              base.extend(ClassMethods)
            end
          end
        end
      end
    end
  end
end