package pkg

import (
	"fmt"
	"net"
	"syscall"
	"testing"

	"golang.org/x/net/route"
)

// netstat -anr | grep 10.61
//10.61/16 utun4 USc utun4
//10.61.10.251 10.176.32.40 UGHWIig utun2
//10.61.64/18 10.61.64.1 UCS utun3
//10.61.64.1 10.61.64.0 UH utun3
func TestConflict(t *testing.T) {
	var mm = make(map[string][]*net.IPNet)
	_, ipNet, err := net.ParseCIDR("10.61.0.0/16")
	if err != nil {
		panic(err)
	}
	_, ipNet2, err := net.ParseCIDR("10.61.64.0/18")
	if err != nil {
		panic(err)
	}
	_, ipNet3, err := net.ParseCIDR("10.61.64.1/24")
	if err != nil {
		panic(err)
	}

	mm["utun4"] = []*net.IPNet{ipNet}
	mm["utun3"] = []*net.IPNet{ipNet2, ipNet3}

	var origin = "utun4"
	conflict := detectConflictDevice(origin, mm)
	fmt.Println(conflict)
}

func TestGetConflictDevice(t *testing.T) {
	err := DetectAndDisableConflictDevice("utun2")
	if err != nil {
		panic(err)
	}
}

func TestParse(t *testing.T) {
	rib, err := route.FetchRIB(syscall.AF_INET, syscall.NET_RT_DUMP, 0)
	if err != nil {
		panic(err)
	}
	msgs, err := route.ParseRIB(syscall.NET_RT_DUMP, rib)
	if err != nil {
		panic(err)
	}
	nameToIndex := make(map[int]string)
	addrs, err := net.Interfaces()
	for _, addr := range addrs {
		nameToIndex[addr.Index] = addr.Name
	}

	m := make(map[string][]route.Addr)
	for _, msg := range msgs {
		message := msg.(*route.RouteMessage)
		if name, found := nameToIndex[message.Index]; found {
			if v, ok := m[name]; ok {
				temp := removeEmptyElement(message)
				m[name] = append(v, temp...)
			} else {
				m[name] = removeEmptyElement(message)
			}
		}
	}
	fmt.Println(m)
}

func removeEmptyElement(message *route.RouteMessage) []route.Addr {
	var temp []route.Addr
	for _, addr := range message.Addrs {
		if addr != nil {
			temp = append(temp, addr)
		}
	}
	return temp
}

func TestGetRouteTableByNetstat(t *testing.T) {
	ip := net.ParseIP("192.168.1.1")
	for i := range ip.To4() {
		fmt.Println(i)
	}
}

func TestInteract(t *testing.T) {
	type data struct {
		ipNet1 *net.IPNet
		ipNet2 *net.IPNet
		result bool
	}
	var list = []data{{
		ipNet1: &net.IPNet{
			IP:   net.ParseIP("192.168.1.1"),
			Mask: net.CIDRMask(24, 32),
		},
		ipNet2: &net.IPNet{
			IP:   net.ParseIP("192.168.100.100"),
			Mask: net.CIDRMask(16, 32),
		},
		result: true,
	}, {
		ipNet1: &net.IPNet{
			IP:   net.ParseIP("192.168.0.0"),
			Mask: net.CIDRMask(17, 32),
		},
		ipNet2: &net.IPNet{
			IP:   net.ParseIP("192.168.0.0"),
			Mask: net.CIDRMask(16, 32),
		},
		result: true,
	}, {
		ipNet1: &net.IPNet{
			IP:   net.ParseIP("191.168.0.0"),
			Mask: net.CIDRMask(17, 32),
		},
		ipNet2: &net.IPNet{
			IP:   net.ParseIP("192.168.0.0"),
			Mask: net.CIDRMask(16, 32),
		},
		result: false,
	}, {
		ipNet1: &net.IPNet{
			IP:   net.ParseIP("255.255.255.0"),
			Mask: net.CIDRMask(24, 32),
		},
		ipNet2: &net.IPNet{
			IP:   net.ParseIP("255.255.0.0"),
			Mask: net.CIDRMask(16, 32),
		},
		result: true,
	}, {
		ipNet1: &net.IPNet{
			IP:   net.ParseIP("255.255.255.255"),
			Mask: net.CIDRMask(32, 32),
		},
		ipNet2: &net.IPNet{
			IP:   net.ParseIP("255.255.0.0"),
			Mask: net.CIDRMask(16, 32),
		},
		result: false,
	}}
	for _, d := range list {
		if b := d.ipNet1.Contains(d.ipNet2.IP) || d.ipNet2.Contains(d.ipNet1.IP); d.result != b {
			t.FailNow()
		}
	}
}