# frozen_string_literal: true

class GlobusClient
  # Lookup of a Globus identity ID
  class Identity
    def initialize(config)
      @config = config
    end

    def get_identity_id(user_id)
      @email = user_id

      response = lookup_identity
      UnexpectedResponse.call(response) unless response.success?

      data = JSON.parse(response.body)
      extract_id(data)
    end

    def exists?(user_id)
      get_identity_id(user_id)
      true
    rescue
      false
    end

    private

    attr_reader :config

    def connection
      Faraday.new(url: config.auth_url)
    end

    def lookup_identity
      id_endpoint = "/v2/api/identities"
      connection.get(id_endpoint) do |req|
        req.params["usernames"] = @email
        req.headers["Authorization"] = "Bearer #{config.token}"
      end
    end

    def extract_id(data)
      identities = data["identities"]
      # Select identity with "used" or "private" status
      matching_users = identities.select { |id| id["username"] == @email }
      active_users = matching_users.select { |user| (user["status"] == "used" || user["status"] == "private") }
      raise "No matching active Globus user found for #{@email}." if active_users.empty?

      active_users.first["id"]
    end
  end
end