require "sentry/transport"

module Sentry
  class Client
    attr_reader :transport, :configuration

    def initialize(configuration)
      @configuration = configuration

      if transport_class = configuration.transport.transport_class
        @transport = transport_class.new(configuration)
      else
        @transport =
          case configuration.dsn&.scheme
          when 'http', 'https'
            HTTPTransport.new(configuration)
          else
            DummyTransport.new(configuration)
          end
      end
    end

    def capture_event(event, scope, hint = {})
      return unless configuration.sending_allowed?

      scope.apply_to_event(event, hint)

      if async_block = configuration.async
        begin
          # We have to convert to a JSON-like hash, because background job
          # processors (esp ActiveJob) may not like weird types in the event hash
          event_hash = event.to_json_compatible

          if async_block.arity == 2
            hint = JSON.parse(JSON.generate(hint))
            async_block.call(event_hash, hint)
          else
            async_block.call(event_hash)
          end
        rescue => e
          configuration.logger.error(LOGGER_PROGNAME) { "async event sending failed: #{e.message}" }
          send_event(event, hint)
        end
      else
        if hint.fetch(:background, true)
          Sentry.background_worker.perform do
            send_event(event, hint)
          end
        else
          send_event(event, hint)
        end
      end

      event
    end

    def event_from_exception(exception, hint = {})
      integration_meta = Sentry.integrations[hint[:integration]]
      return unless @configuration.exception_class_allowed?(exception)

      Event.new(configuration: configuration, integration_meta: integration_meta).tap do |event|
        event.add_exception_interface(exception)
        event.add_threads_interface(crashed: true)
      end
    end

    def event_from_message(message, hint = {})
      integration_meta = Sentry.integrations[hint[:integration]]
      event = Event.new(configuration: configuration, integration_meta: integration_meta, message: message)
      event.add_threads_interface(backtrace: caller)
      event
    end

    def event_from_transaction(transaction)
      TransactionEvent.new(configuration: configuration).tap do |event|
        event.transaction = transaction.name
        event.contexts.merge!(trace: transaction.get_trace_context)
        event.timestamp = transaction.timestamp
        event.start_timestamp = transaction.start_timestamp

        finished_spans = transaction.span_recorder.spans.select { |span| span.timestamp && span != transaction }
        event.spans = finished_spans.map(&:to_hash)
      end
    end

    def send_event(event, hint = nil)
      event_type = event.is_a?(Event) ? event.type : event["type"]
      event = configuration.before_send.call(event, hint) if configuration.before_send && event_type == "event"

      if event.nil?
        configuration.logger.info(LOGGER_PROGNAME) { "Discarded event because before_send returned nil" }
        return
      end

      transport.send_event(event)

      event
    end
  end
end