package routing

import (
	"net/netip"
	"sync"

	"github.com/qdm12/gluetun/internal/netlink"
)

type NetLinker interface {
	Addresser
	Router
	Ruler
	Linker
	IsWireguardSupported() (ok bool, err error)
}

type Addresser interface {
	AddrList(link netlink.Link, family int) (
		addresses []netlink.Addr, err error)
	AddrReplace(link netlink.Link, addr netlink.Addr) error
}

type Router interface {
	RouteList(family int) (routes []netlink.Route, err error)
	RouteAdd(route netlink.Route) error
	RouteDel(route netlink.Route) error
	RouteReplace(route netlink.Route) error
}

type Ruler interface {
	RuleList(family int) (rules []netlink.Rule, err error)
	RuleAdd(rule netlink.Rule) error
	RuleDel(rule netlink.Rule) error
}

type Linker interface {
	LinkList() (links []netlink.Link, err error)
	LinkByName(name string) (link netlink.Link, err error)
	LinkByIndex(index int) (link netlink.Link, err error)
	LinkAdd(link netlink.Link) (linkIndex int, err error)
	LinkDel(link netlink.Link) (err error)
	LinkSetUp(link netlink.Link) (linkIndex int, err error)
	LinkSetDown(link netlink.Link) (err error)
}

type Routing struct {
	netLinker       NetLinker
	logger          Logger
	outboundSubnets []netip.Prefix
	stateMutex      sync.RWMutex
}

// New creates a new routing instance.
func New(netLinker NetLinker, logger Logger) *Routing {
	return &Routing{
		netLinker: netLinker,
		logger:    logger,
	}
}