package server

import (
	"log/slog"
	"net/http"

	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
)

// ListenAndServeH2C starts an HTTP server with HTTP/1.1 and unencrypted HTTP/2 support (h2c),
// wrapped with OpenTelemetry HTTP handler for tracing and metrics.
func ListenAndServeH2C(addr string, handler http.Handler, telemetryName string) error {
	instrumentedHandler := otelhttp.NewHandler(handler, telemetryName)

	p := new(http.Protocols)
	p.SetHTTP1(true)
	// Use h2c so we can serve HTTP/2 without TLS.
	p.SetUnencryptedHTTP2(true)
	s := http.Server{
		Addr:      addr,
		Handler:   instrumentedHandler,
		Protocols: p,
	}

	slog.Info("Starting server on " + addr)
	return s.ListenAndServe()
}