package mapper

import (
	"fmt"
	"net/netip"
	"testing"

	"github.com/google/go-cmp/cmp"
	"github.com/google/go-cmp/cmp/cmpopts"
	"github.com/juanfont/headscale/hscontrol/types"
	"tailscale.com/tailcfg"
	"tailscale.com/types/dnstype"
)

var iap = func(ipStr string) *netip.Addr {
	ip := netip.MustParseAddr(ipStr)
	return &ip
}

func TestDNSConfigMapResponse(t *testing.T) {
	tests := []struct {
		magicDNS bool
		want     *tailcfg.DNSConfig
	}{
		{
			magicDNS: true,
			want: &tailcfg.DNSConfig{
				Routes: map[string][]*dnstype.Resolver{},
				Domains: []string{
					"foobar.headscale.net",
				},
				Proxied: true,
			},
		},
		{
			magicDNS: false,
			want: &tailcfg.DNSConfig{
				Domains: []string{"foobar.headscale.net"},
				Proxied: false,
			},
		},
	}

	for _, tt := range tests {
		t.Run(fmt.Sprintf("with-magicdns-%v", tt.magicDNS), func(t *testing.T) {
			mach := func(hostname, username string, userid uint) *types.Node {
				return &types.Node{
					Hostname: hostname,
					UserID:   new(userid),
					User: &types.User{
						Name: username,
					},
				}
			}

			baseDomain := "foobar.headscale.net"

			dnsConfigOrig := tailcfg.DNSConfig{
				Routes:  make(map[string][]*dnstype.Resolver),
				Domains: []string{baseDomain},
				Proxied: tt.magicDNS,
			}

			nodeInShared1 := mach("test_get_shared_nodes_1", "shared1", 1)

			got := generateDNSConfig(
				&types.Config{
					TailcfgDNSConfig: &dnsConfigOrig,
				},
				nodeInShared1.View(),
			)

			if diff := cmp.Diff(tt.want, got, cmpopts.EquateEmpty()); diff != "" {
				t.Errorf("expandAlias() unexpected result (-want +got):\n%s", diff)
			}
		})
	}
}