package notify

import (
	"strconv"
	"strings"
)

const (
	defaultFileScope           = "default"
	clientFileDomain           = "client"
	serverFileDomain           = "server"
	serverTransportScopeSuffix = "#tg:"
)

func normalizeFileScope(scope string) string {
	cleaned := strings.TrimSpace(scope)
	if cleaned == "" {
		return defaultFileScope
	}
	return cleaned
}

func clientFileScope() string {
	return clientFileDomain
}

func serverFileScope(peer any) string {
	logical := logicalConnFromPeer(peer)
	if logical == nil {
		return serverFileDomain + ":unknown"
	}
	id := strings.TrimSpace(logical.ID())
	if id == "" {
		return serverFileDomain + ":unknown"
	}
	return serverFileDomain + ":" + id
}

func serverTransportScope(peer any) string {
	logical := logicalConnFromPeer(peer)
	if logical == nil {
		return serverFileDomain + ":unknown"
	}
	return serverTransportScopeByGeneration(logical, logical.transportGenerationSnapshot())
}

func serverTransportScopeForTransport(transport *TransportConn) string {
	if transport == nil {
		return serverFileDomain + ":unknown"
	}
	return transport.transportScope()
}

func serverTransportScopeByGeneration(peer any, generation uint64) string {
	base := serverFileScope(peer)
	if generation == 0 {
		return base
	}
	return base + serverTransportScopeSuffix + strconv.FormatUint(generation, 10)
}

func serverTransportDeliveryScopes(peer any) []string {
	logical := logicalConnFromPeer(peer)
	if logical == nil {
		return []string{serverFileDomain + ":unknown"}
	}
	base := serverFileScope(logical)
	transport := serverTransportScope(logical)
	if transport == base {
		return []string{base}
	}
	return []string{transport, base}
}

func serverTransportDeliveryScopesForTransport(transport *TransportConn) []string {
	if transport == nil {
		return []string{serverFileDomain + ":unknown"}
	}
	return transport.deliveryScopes()
}

func scopeBelongsToServerFileScope(scope string, base string) bool {
	scope = normalizeFileScope(scope)
	base = normalizeFileScope(base)
	return scope == base || strings.HasPrefix(scope, base+serverTransportScopeSuffix)
}