type Option struct {
	// log level (default: debug)
	Level slog.Leveler

	// datadog endpoint
	Client  *datadog.APIClient
	Context context.Context
	Timeout time.Duration	// default: 10s

	// source parameters
	Service    string
	Hostname   string
	GlobalTags map[string]string

	// optional: customize Datadog message builder
	Converter Converter
	// optional: custom marshaler
	Marshaler func(v any) ([]byte, error)

	// optional: see slog.HandlerOptions
	AddSource   bool
	ReplaceAttr func(groups []string, a slog.Attr) slog.Attr
}

slogdatadog.SourceKey = "source"
slogdatadog.ErrorKeys = []string{"error", "err"}

import (
	"github.com/DataDog/datadog-api-client-go/v2/api/datadog"
	slogdatadog "github.com/samber/slog-datadog/v2"
	"log/slog"
)

func newDatadogClient(endpoint string, apiKey string) (*datadog.APIClient, context.Context) {
	ctx := datadog.NewDefaultContext(context.Background())
	ctx = context.WithValue(
		ctx,
		datadog.ContextAPIKeys,
		map[string]datadog.APIKey{"apiKeyAuth": {Key: apiKey}},
	)
	ctx = context.WithValue(
		ctx,
		datadog.ContextServerVariables,
		map[string]string{"site": endpoint},
	)
	configuration := datadog.NewConfiguration()
	apiClient := datadog.NewAPIClient(configuration)

	return apiClient, ctx
}

func main() {
	host := "1.2.3.4"
	service := "api"
	endpoint := slogdatadog.DatadogHostEU
	apiKey := "xxx"
	apiClient, ctx := newDatadogClient(endpoint, apiKey)

	logger := slog.New(slogdatadog.Option{Level: slog.LevelDebug, Client: apiClient, Context: ctx, Timeout: 5*time.Second, Hostname: host, Service: service}.NewDatadogHandler())
	logger = logger.
		With("environment", "dev").
		With("release", "v1.0.0")

	// log error
	logger.
		With("category", "sql").
		With("query.statement", "SELECT COUNT(*) FROM users;").
		With("query.duration", 1*time.Second).
		With("error", fmt.Errorf("could not count users")).
		Error("caramba!")

	// log user signup
	logger.
		With(
			slog.Group("user",
				slog.String("id", "user-123"),
				slog.Time("created_at", time.Now()),
			),
		).
		Info("user registration")
}