package trace

import (
	"context"

	"go.opentelemetry.io/otel"
	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
	"go.opentelemetry.io/otel/propagation"
	"go.opentelemetry.io/otel/sdk/resource"
	sdktrace "go.opentelemetry.io/otel/sdk/trace"
	semconv "go.opentelemetry.io/otel/semconv/v1.26.0"
)

func InitTrace() (*sdktrace.TracerProvider, error) {
	// Initialize OpenTelemetry tracing
	ctx := context.Background()
	// Configure OpenTelemetry with your desired settings
	exporter, err := otlptracehttp.New(ctx, otlptracehttp.WithEndpoint("localhost:4318"), otlptracehttp.WithInsecure())
	if err != nil {
		return nil, err
	}
	// Create a new TracerProvider with the exporter
	// and a sampler (e.g., AlwaysSample)
	tracerProvider := sdktrace.NewTracerProvider(
		sdktrace.WithSampler(sdktrace.AlwaysSample()),
		sdktrace.WithBatcher(exporter),
		// You may want to set resource attributes here, e.g. service name/version
		sdktrace.WithResource(resource.NewWithAttributes(
			semconv.SchemaURL,
			semconv.ServiceNameKey.String("go-telecom"),
		)),
	)
	// Set the global trace provider
	otel.SetTracerProvider(tracerProvider)
	// set the global propagator
	otel.SetTextMapPropagator(propagation.TraceContext{})

	return tracerProvider, nil
}