package otel

import (
	"go.opentelemetry.io/otel/attribute"
	"go.opentelemetry.io/otel/sdk/resource"
	semconv "go.opentelemetry.io/otel/semconv/v1.18.0"
)

// newResource builds an OTel resource for the Gerbil service.
func newResource(serviceName, serviceVersion, deploymentEnv string) (*resource.Resource, error) {
	attrs := []attribute.KeyValue{
		semconv.ServiceName(serviceName),
	}
	if serviceVersion != "" {
		attrs = append(attrs, semconv.ServiceVersion(serviceVersion))
	}
	if deploymentEnv != "" {
		attrs = append(attrs, semconv.DeploymentEnvironment(deploymentEnv))
	}

	return resource.Merge(
		resource.Default(),
		resource.NewSchemaless(attrs...),
	)
}