class Aws::CloudWatchEvidently::Plugins::Endpoints::Handler

def apply_endpoint_headers(context, headers)
  headers.each do |key, values|
    value = values
      .compact
      .map { |s| Seahorse::Util.escape_header_list_string(s.to_s) }
      .join(',')
    context.http_request.headers[key] = value
  end
end

def call(context)
  unless context[:discovered_endpoint]
    params = Aws::CloudWatchEvidently::Endpoints.parameters_for_operation(context)
    endpoint = context.config.endpoint_provider.resolve_endpoint(params)
    context.http_request.endpoint = endpoint.url
    apply_endpoint_headers(context, endpoint.headers)
    context[:endpoint_params] = params
    context[:endpoint_properties] = endpoint.properties
  end
  context[:auth_scheme] =
    Aws::Endpoints.resolve_auth_scheme(context, endpoint)
  with_metrics(context) { @handler.call(context) }
end

def with_metrics(context, &block)
  metrics = []
  metrics << 'ENDPOINT_OVERRIDE' unless context.config.regional_endpoint
  if context[:auth_scheme] && context[:auth_scheme]['name'] == 'sigv4a'
    metrics << 'SIGV4A_SIGNING'
  end
  if context.config.credentials&.credentials&.account_id
    metrics << 'RESOLVED_ACCOUNT_ID'
  end
  Aws::Plugins::UserAgent.metric(*metrics, &block)
end