// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

package network_test

import (
	_ "embed"
	"net/netip"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"github.com/siderolabs/talos/pkg/machinery/config/configloader"
	"github.com/siderolabs/talos/pkg/machinery/config/encoder"
	"github.com/siderolabs/talos/pkg/machinery/config/types/meta"
	"github.com/siderolabs/talos/pkg/machinery/config/types/network"
	"github.com/siderolabs/talos/pkg/machinery/config/types/v1alpha1"
)

//go:embed testdata/resolverconfig.yaml
var expectedResolverConfigDocument []byte

func TestResolverConfigMarshalStability(t *testing.T) {
	t.Parallel()

	cfg := network.NewResolverConfigV1Alpha1()
	cfg.ResolverNameservers = []network.NameserverConfig{
		{
			Address: network.Addr{Addr: netip.MustParseAddr("10.0.0.1")},
		},
		{
			Address: network.Addr{Addr: netip.MustParseAddr("2001:4860:4860::8888")},
		},
	}
	cfg.ResolverSearchDomains = network.SearchDomainsConfig{
		SearchDomains:        []string{"example.org", "example.com"},
		SearchDisableDefault: new(false),
	}

	marshaled, err := encoder.NewEncoder(cfg, encoder.WithComments(encoder.CommentsDisabled)).Encode()
	require.NoError(t, err)

	t.Log(string(marshaled))

	assert.Equal(t, expectedResolverConfigDocument, marshaled)
}

func TestResolverConfigUnmarshal(t *testing.T) {
	t.Parallel()

	provider, err := configloader.NewFromBytes(expectedResolverConfigDocument)
	require.NoError(t, err)

	docs := provider.Documents()
	require.Len(t, docs, 1)

	assert.Equal(t, &network.ResolverConfigV1Alpha1{
		Meta: meta.Meta{
			MetaAPIVersion: "v1alpha1",
			MetaKind:       network.ResolverKind,
		},
		ResolverNameservers: []network.NameserverConfig{
			{
				Address: network.Addr{Addr: netip.MustParseAddr("10.0.0.1")},
			},
			{
				Address: network.Addr{Addr: netip.MustParseAddr("2001:4860:4860::8888")},
			},
		},
		ResolverSearchDomains: network.SearchDomainsConfig{
			SearchDomains:        []string{"example.org", "example.com"},
			SearchDisableDefault: new(false),
		},
	}, docs[0])
}

func TestResolverV1Alpha1Validate(t *testing.T) {
	t.Parallel()

	for _, test := range []struct {
		name        string
		v1alpha1Cfg *v1alpha1.Config
		cfg         func() *network.ResolverConfigV1Alpha1

		expectedError string
	}{
		{
			name:        "empty",
			v1alpha1Cfg: &v1alpha1.Config{},
			cfg:         network.NewResolverConfigV1Alpha1,
		},
		{
			name: "v1alpha1 nameservers set",
			v1alpha1Cfg: &v1alpha1.Config{
				MachineConfig: &v1alpha1.MachineConfig{
					MachineNetwork: &v1alpha1.NetworkConfig{ //nolint:staticcheck // legacy config
						NameServers: []string{"1.1.1.1"},
					},
				},
			},
			cfg: network.NewResolverConfigV1Alpha1,

			expectedError: ".machine.network.nameservers is already set in v1alpha1 config",
		},
		{
			name: "v1alpha1 search domains set",
			v1alpha1Cfg: &v1alpha1.Config{
				MachineConfig: &v1alpha1.MachineConfig{
					MachineNetwork: &v1alpha1.NetworkConfig{ //nolint:staticcheck // legacy config
						Searches: []string{"cluster.org"},
					},
				},
			},
			cfg: network.NewResolverConfigV1Alpha1,

			expectedError: ".machine.network.searchDomains is already set in v1alpha1 config",
		},
		{
			name: "v1alpha1 disable search domains set",
			v1alpha1Cfg: &v1alpha1.Config{
				MachineConfig: &v1alpha1.MachineConfig{
					MachineNetwork: &v1alpha1.NetworkConfig{ //nolint:staticcheck // legacy config
						NetworkDisableSearchDomain: new(true),
					},
				},
			},
			cfg: network.NewResolverConfigV1Alpha1,

			expectedError: ".machine.network.disableSearchDomain is already set in v1alpha1 config",
		},
	} {
		t.Run(test.name, func(t *testing.T) {
			t.Parallel()

			err := test.cfg().V1Alpha1ConflictValidate(test.v1alpha1Cfg)
			if test.expectedError != "" {
				assert.EqualError(t, err, test.expectedError)
			} else {
				assert.NoError(t, err)
			}
		})
	}
}
