/*
   Copyright The containerd Authors.

   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 container

import (
	"testing"

	"github.com/opencontainers/runtime-spec/specs-go"
	"gotest.tools/v3/assert"

	"github.com/containerd/nerdctl/v2/pkg/api/types"
	"github.com/containerd/nerdctl/v2/pkg/imgutil"
)

// TestCreateSnapshotOpts tests the createSnapshotOpts function.
func TestCreateSnapshotOpts(t *testing.T) {
	t.Parallel()
	tests := []struct {
		name        string
		id          string
		image       imgutil.EnsuredImage
		uidMaps     []specs.LinuxIDMapping
		gidMaps     []specs.LinuxIDMapping
		expectError bool
	}{
		{
			name:  "Single remapping",
			id:    "container1",
			image: imgutil.EnsuredImage{},
			uidMaps: []specs.LinuxIDMapping{
				{HostID: 1000, Size: 1},
			},
			gidMaps: []specs.LinuxIDMapping{
				{HostID: 1000, Size: 1},
			},
			expectError: false,
		},
		{
			name:  "Multi remapping with support",
			id:    "container2",
			image: imgutil.EnsuredImage{},
			uidMaps: []specs.LinuxIDMapping{
				{HostID: 1000, Size: 1},
				{HostID: 2000, Size: 1},
			},
			gidMaps: []specs.LinuxIDMapping{
				{HostID: 3000, Size: 1},
			},
			expectError: false,
		},
		{
			name:        "Empty UID/GID maps",
			id:          "container4",
			image:       imgutil.EnsuredImage{},
			uidMaps:     []specs.LinuxIDMapping{},
			gidMaps:     []specs.LinuxIDMapping{},
			expectError: true,
		},
	}

	for _, testCase := range tests {
		t.Run(testCase.name, func(t *testing.T) {
			t.Parallel()
			_, err := createSnapshotOpts(testCase.id, testCase.image, testCase.uidMaps, testCase.gidMaps)

			if testCase.expectError {
				assert.Assert(t, err != nil)
			} else {
				assert.NilError(t, err)
			}
		})
	}
}

// TestGetContainerNameFromNetworkSlice tests the getContainerNameFromNetworkSlice function.
func TestGetContainerNameFromNetworkSlice(t *testing.T) {
	t.Parallel()
	tests := []struct {
		name        string
		netOpts     types.NetworkOptions
		expected    string
		expectError bool
	}{
		{
			name: "Valid input with container name",
			netOpts: types.NetworkOptions{
				NetworkSlice: []string{"container:mycontainer"},
			},
			expected:    "mycontainer",
			expectError: false,
		},
		{
			name: "Invalid input with no colon separator",
			netOpts: types.NetworkOptions{
				NetworkSlice: []string{"container-mycontainer"},
			},
			expected:    "",
			expectError: true,
		},
		{
			name: "Empty NetworkSlice",
			netOpts: types.NetworkOptions{
				NetworkSlice: []string{""},
			},
			expected:    "",
			expectError: true,
		},
		{
			name: "Missing container name",
			netOpts: types.NetworkOptions{
				NetworkSlice: []string{"container:"},
			},
			expected:    "",
			expectError: true,
		},
	}

	for _, testCase := range tests {
		t.Run(testCase.name, func(t *testing.T) {
			t.Parallel()
			containerName, err := getContainerNameFromNetworkSlice(testCase.netOpts)
			if testCase.expectError {
				assert.Assert(t, err != nil)
			} else {
				assert.NilError(t, err)
				assert.Equal(t, testCase.expected, containerName)
			}
		})
	}
}