// Copyright 2019 Yunion
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package iproute2

import (
	"net"
	"testing"

	"github.com/vishvananda/netlink"
)

func TestRoute(t *testing.T) {
	t.Run("ensure non-nil route.dst", func(t *testing.T) {
		dstStr := "114.114.114.114"
		routes, err := RouteGetByDst(dstStr)
		if err != nil {
			t.Skipf("route get: %v", err)
		}
		if len(routes) == 0 {
			t.Skipf("no route to %s", dstStr)
		}
		for _, r := range routes {
			if r.LinkIndex <= 0 {
				continue
			}
			nllink, err := netlink.LinkByIndex(r.LinkIndex)
			if err != nil {
				t.Errorf("link by index: %v", err)
				continue
			}
			routes2, err := NewRoute(nllink.Attrs().Name).List4()
			for _, r2 := range routes2 {
				if r2.Dst.String() == "0.0.0.0/0" {
					t.Logf("yeah, dst of default route is not nil: %s", r2)
				}
			}
		}

	})

	t.Run("route del", func(t *testing.T) {
		ifname := genDummyName(t)
		dum := addDummy(t, ifname)
		defer delDummy(t, dum)

		r := NewRoute(ifname)
		r.DelByCidr("10.1.1.30/32")
		if err := r.Err(); !IsErrSrch(err) {
			t.Errorf("expecting ESRCH, got %v", err)
		}
	})

	t.Run("route add", func(t *testing.T) {
		ifname1 := genDummyName(t)
		dum := addDummy(t, ifname1)
		defer delDummy(t, dum)

		ifname := "lo"

		for _, cidr := range [][]string{
			[]string{
				"127.1.0.1/24",
				"127.0.0.2",
			},
			[]string{
				"192.168.120.243/24",
				"127.0.0.2",
			},
		} {
			_, ipnet, err := net.ParseCIDR(cidr[0])
			if err != nil {
				t.Errorf("ParseCIDR error %s", err)
				continue
			}
			gw := net.ParseIP(cidr[1])

			r := NewRoute(ifname)
			r.AddByIPNet(ipnet, gw)
			if err := r.Err(); err != nil {
				t.Errorf("got error %v", err)
			}

			r.DelByIPNet(ipnet)

			if err := r.Err(); err != nil {
				t.Errorf("del error %v", err)
			}
		}
	})
}