/**
# Copyright (c) 2021-2022, NVIDIA CORPORATION.  All rights reserved.
#
# 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 docker

import (
	"encoding/json"
	"fmt"
	"testing"

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

func TestUpdateConfigDefaultRuntime(t *testing.T) {
	testCases := []struct {
		config                     map[string]interface{}
		defaultRuntime             string
		runtimeName                string
		expectedDefaultRuntimeName interface{}
	}{
		{
			defaultRuntime:             "",
			expectedDefaultRuntimeName: nil,
		},
		{
			defaultRuntime:             "NAME",
			expectedDefaultRuntimeName: "NAME",
		},
		{
			config: map[string]interface{}{
				"default-runtime": "ALREADY_SET",
			},
			defaultRuntime:             "",
			expectedDefaultRuntimeName: "ALREADY_SET",
		},
		{
			config: map[string]interface{}{
				"default-runtime": "ALREADY_SET",
			},
			defaultRuntime:             "NAME",
			expectedDefaultRuntimeName: "NAME",
		},
	}

	for i, tc := range testCases {
		t.Run(fmt.Sprintf("test case %d", i), func(t *testing.T) {
			if tc.config == nil {
				tc.config = make(map[string]interface{})
			}
			err := UpdateConfig(tc.config, tc.defaultRuntime, nil)
			require.NoError(t, err)

			defaultRuntimeName := tc.config["default-runtime"]
			require.EqualValues(t, tc.expectedDefaultRuntimeName, defaultRuntimeName)
		})
	}
}

func TestUpdateConfigRuntimes(t *testing.T) {
	testCases := []struct {
		config         map[string]interface{}
		runtimes       map[string]interface{}
		expectedConfig map[string]interface{}
	}{
		{
			config: map[string]interface{}{},
			runtimes: map[string]interface{}{
				"runtime1": map[string]interface{}{
					"path": "/test/runtime/dir/runtime1",
					"args": []string{},
				},
				"runtime2": map[string]interface{}{
					"path": "/test/runtime/dir/runtime2",
					"args": []string{},
				},
			},
			expectedConfig: map[string]interface{}{
				"runtimes": map[string]interface{}{
					"runtime1": map[string]interface{}{
						"path": "/test/runtime/dir/runtime1",
						"args": []string{},
					},
					"runtime2": map[string]interface{}{
						"path": "/test/runtime/dir/runtime2",
						"args": []string{},
					},
				},
			},
		},
		{
			config: map[string]interface{}{
				"runtimes": map[string]interface{}{
					"runtime1": map[string]interface{}{
						"path": "runtime1",
						"args": []string{},
					},
				},
			},
			runtimes: map[string]interface{}{
				"runtime1": map[string]interface{}{
					"path": "/test/runtime/dir/runtime1",
					"args": []string{},
				},
				"runtime2": map[string]interface{}{
					"path": "/test/runtime/dir/runtime2",
					"args": []string{},
				},
			},
			expectedConfig: map[string]interface{}{
				"runtimes": map[string]interface{}{
					"runtime1": map[string]interface{}{
						"path": "/test/runtime/dir/runtime1",
						"args": []string{},
					},
					"runtime2": map[string]interface{}{
						"path": "/test/runtime/dir/runtime2",
						"args": []string{},
					},
				},
			},
		},
		{
			config: map[string]interface{}{
				"runtimes": map[string]interface{}{
					"not-nvidia": map[string]interface{}{
						"path": "some-other-path",
						"args": []string{},
					},
				},
			},
			runtimes: map[string]interface{}{
				"runtime1": map[string]interface{}{
					"path": "/test/runtime/dir/runtime1",
					"args": []string{},
				},
			},
			expectedConfig: map[string]interface{}{
				"runtimes": map[string]interface{}{
					"not-nvidia": map[string]interface{}{
						"path": "some-other-path",
						"args": []string{},
					},
					"runtime1": map[string]interface{}{
						"path": "/test/runtime/dir/runtime1",
						"args": []string{},
					},
				},
			},
		},
		{
			config: map[string]interface{}{
				"exec-opts":  []string{"native.cgroupdriver=systemd"},
				"log-driver": "json-file",
				"log-opts": map[string]string{
					"max-size": "100m",
				},
				"storage-driver": "overlay2",
			},
			runtimes: map[string]interface{}{
				"runtime1": map[string]interface{}{
					"path": "/test/runtime/dir/runtime1",
					"args": []string{},
				},
			},
			expectedConfig: map[string]interface{}{
				"exec-opts":  []string{"native.cgroupdriver=systemd"},
				"log-driver": "json-file",
				"log-opts": map[string]string{
					"max-size": "100m",
				},
				"storage-driver": "overlay2",
				"runtimes": map[string]interface{}{
					"runtime1": map[string]interface{}{
						"path": "/test/runtime/dir/runtime1",
						"args": []string{},
					},
				},
			},
		},
		{
			config: map[string]interface{}{
				"exec-opts":  []string{"native.cgroupdriver=systemd"},
				"log-driver": "json-file",
				"log-opts": map[string]string{
					"max-size": "100m",
				},
				"storage-driver": "overlay2",
			},
			expectedConfig: map[string]interface{}{
				"exec-opts":  []string{"native.cgroupdriver=systemd"},
				"log-driver": "json-file",
				"log-opts": map[string]string{
					"max-size": "100m",
				},
				"storage-driver": "overlay2",
			},
		},
	}

	for i, tc := range testCases {
		t.Run(fmt.Sprintf("test case %d", i), func(t *testing.T) {
			err := UpdateConfig(tc.config, "", tc.runtimes)
			require.NoError(t, err)

			configContent, err := json.MarshalIndent(tc.config, "", "    ")
			require.NoError(t, err)

			expectedContent, err := json.MarshalIndent(tc.expectedConfig, "", "    ")
			require.NoError(t, err)

			require.EqualValues(t, string(expectedContent), string(configContent))
		})

	}
}