package observability

import (
	"context"
	"time"

	"go.opentelemetry.io/otel"
	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
	"go.opentelemetry.io/otel/propagation"
	"go.opentelemetry.io/otel/sdk/resource"

	semconv "go.opentelemetry.io/otel/semconv/v1.26.0"
	sdktrace "go.opentelemetry.io/otel/trace"
)

func InitTracing(ctx context.Context, serviceName, endpoint string) (func(context.Context) error, error) {
	exp, err := otlptracehttp.New(ctx, otlptracehttp.WithEndpoint(endpoint), otlptracehttp.WithInsecure())
	if err != nil {
		return nil, err
	}

	res, err := resource.New(ctx, resource.WithAttributes(semconv.ServiceName(serviceName)),)
	if err != nil {
		return nil, err
	}

	tp := sdktrace.NewTraceProvider(sdktrace.WithBatcher(exp, sdktrace.WithBatchTimeout(5*time.Second)), sdktrace.WithResource(res),)

	otel.SetTracerProvider(tp)
	otel.SetTextMapPropagator(propagation.TraceContext{})
	return tp.Shutdown, nil
}