package config

import "strings"

// DetectProtocol infers protocol from a share/proxy URI.
func DetectProtocol(raw string) Protocol {
	lower := strings.ToLower(strings.TrimSpace(raw))
	switch {
	case strings.HasPrefix(lower, "hysteria2://"), strings.HasPrefix(lower, "hy2://"):
		return ProtocolHysteria2
	case strings.HasPrefix(lower, "naive+"), strings.HasPrefix(lower, "naive://"),
		strings.HasPrefix(lower, "https://"), strings.HasPrefix(lower, "quic://"),
		strings.HasPrefix(lower, "http://"):
		return ProtocolNaive
	default:
		return ""
	}
}