/*
   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 server

import (
	"testing"

	imagespec "github.com/opencontainers/image-spec/specs-go/v1"
	runtimespec "github.com/opencontainers/runtime-spec/specs-go"
	"github.com/stretchr/testify/assert"
	runtime "k8s.io/cri-api/pkg/apis/runtime/v1"

	"github.com/containerd/containerd/pkg/cri/annotations"
	"github.com/containerd/containerd/pkg/cri/config"
)

func getCreateContainerTestData() (*runtime.ContainerConfig, *runtime.PodSandboxConfig,
	*imagespec.ImageConfig, func(*testing.T, string, string, uint32, *runtimespec.Spec)) {
	config := &runtime.ContainerConfig{
		Metadata: &runtime.ContainerMetadata{
			Name:    "test-name",
			Attempt: 1,
		},
		Image: &runtime.ImageSpec{
			Image: "sha256:c75bebcdd211f41b3a460c7bf82970ed6c75acaab9cd4c9a4e125b03ca113799",
		},
		Command:    []string{"test", "command"},
		Args:       []string{"test", "args"},
		WorkingDir: "test-cwd",
		Envs: []*runtime.KeyValue{
			{Key: "k1", Value: "v1"},
			{Key: "k2", Value: "v2"},
			{Key: "k3", Value: "v3=v3bis"},
			{Key: "k4", Value: "v4=v4bis=foop"},
		},
		Mounts: []*runtime.Mount{
			// everything default
			{
				ContainerPath: "container-path-1",
				HostPath:      "host-path-1",
			},
			// readOnly
			{
				ContainerPath: "container-path-2",
				HostPath:      "host-path-2",
				Readonly:      true,
			},
		},
		Labels:      map[string]string{"a": "b"},
		Annotations: map[string]string{"c": "d"},
		Windows: &runtime.WindowsContainerConfig{
			Resources: &runtime.WindowsContainerResources{
				CpuShares:          100,
				CpuCount:           200,
				CpuMaximum:         300,
				MemoryLimitInBytes: 400,
			},
			SecurityContext: &runtime.WindowsContainerSecurityContext{
				RunAsUsername:  "test-user",
				CredentialSpec: "{\"test\": \"spec\"}",
				HostProcess:    false,
			},
		},
	}
	sandboxConfig := &runtime.PodSandboxConfig{
		Metadata: &runtime.PodSandboxMetadata{
			Name:      "test-sandbox-name",
			Uid:       "test-sandbox-uid",
			Namespace: "test-sandbox-ns",
			Attempt:   2,
		},
		Windows:     &runtime.WindowsPodSandboxConfig{},
		Hostname:    "test-hostname",
		Annotations: map[string]string{"c": "d"},
	}
	imageConfig := &imagespec.ImageConfig{
		Env:        []string{"ik1=iv1", "ik2=iv2", "ik3=iv3=iv3bis", "ik4=iv4=iv4bis=boop"},
		Entrypoint: []string{"/entrypoint"},
		Cmd:        []string{"cmd"},
		WorkingDir: "/workspace",
		User:       "ContainerUser",
	}
	specCheck := func(t *testing.T, id string, sandboxID string, sandboxPid uint32, spec *runtimespec.Spec) {
		assert.Nil(t, spec.Root)
		assert.Equal(t, "test-hostname", spec.Hostname)
		assert.Equal(t, []string{"test", "command", "test", "args"}, spec.Process.Args)
		assert.Equal(t, "test-cwd", spec.Process.Cwd)
		assert.Contains(t, spec.Process.Env, "k1=v1", "k2=v2", "k3=v3=v3bis", "ik4=iv4=iv4bis=boop")
		assert.Contains(t, spec.Process.Env, "ik1=iv1", "ik2=iv2", "ik3=iv3=iv3bis", "k4=v4=v4bis=foop")

		t.Logf("Check bind mount")
		checkMount(t, spec.Mounts, "host-path-1", "container-path-1", "", []string{"rw"}, nil)
		checkMount(t, spec.Mounts, "host-path-2", "container-path-2", "", []string{"ro"}, nil)

		t.Logf("Check resource limits")
		assert.EqualValues(t, *spec.Windows.Resources.CPU.Shares, 100)
		assert.EqualValues(t, *spec.Windows.Resources.CPU.Count, 200)
		assert.EqualValues(t, *spec.Windows.Resources.CPU.Maximum, 300)
		assert.EqualValues(t, *spec.Windows.Resources.CPU.Maximum, 300)
		assert.EqualValues(t, *spec.Windows.Resources.Memory.Limit, 400)

		// Also checks if override of the image configs user is behaving.
		t.Logf("Check username")
		assert.Contains(t, spec.Process.User.Username, "test-user")

		t.Logf("Check credential spec")
		assert.Contains(t, spec.Windows.CredentialSpec, "{\"test\": \"spec\"}")

		t.Logf("Check PodSandbox annotations")
		assert.Contains(t, spec.Annotations, annotations.SandboxID)
		assert.EqualValues(t, spec.Annotations[annotations.SandboxID], sandboxID)

		assert.Contains(t, spec.Annotations, annotations.ContainerType)
		assert.EqualValues(t, spec.Annotations[annotations.ContainerType], annotations.ContainerTypeContainer)

		assert.Contains(t, spec.Annotations, annotations.SandboxNamespace)
		assert.EqualValues(t, spec.Annotations[annotations.SandboxNamespace], "test-sandbox-ns")

		assert.Contains(t, spec.Annotations, annotations.SandboxName)
		assert.EqualValues(t, spec.Annotations[annotations.SandboxName], "test-sandbox-name")

		assert.Contains(t, spec.Annotations, annotations.WindowsHostProcess)
		assert.EqualValues(t, spec.Annotations[annotations.WindowsHostProcess], "false")
	}
	return config, sandboxConfig, imageConfig, specCheck
}

func TestContainerWindowsNetworkNamespace(t *testing.T) {
	testID := "test-id"
	testSandboxID := "sandbox-id"
	testContainerName := "container-name"
	testPid := uint32(1234)
	nsPath := "test-cni"
	c := newTestCRIService()

	containerConfig, sandboxConfig, imageConfig, specCheck := getCreateContainerTestData()
	spec, err := c.containerSpec(testID, testSandboxID, testPid, nsPath, testContainerName, testImageName, containerConfig, sandboxConfig, imageConfig, nil, config.Runtime{})
	assert.NoError(t, err)
	assert.NotNil(t, spec)
	specCheck(t, testID, testSandboxID, testPid, spec)
	assert.NotNil(t, spec.Windows)
	assert.NotNil(t, spec.Windows.Network)
	assert.Equal(t, nsPath, spec.Windows.Network.NetworkNamespace)
}

func TestMountCleanPath(t *testing.T) {
	testID := "test-id"
	testSandboxID := "sandbox-id"
	testContainerName := "container-name"
	testPid := uint32(1234)
	nsPath := "test-cni"
	c := newTestCRIService()

	containerConfig, sandboxConfig, imageConfig, specCheck := getCreateContainerTestData()
	containerConfig.Mounts = append(containerConfig.Mounts, &runtime.Mount{
		ContainerPath: "c:/test/container-path",
		HostPath:      "c:/test/host-path",
	})
	spec, err := c.containerSpec(testID, testSandboxID, testPid, nsPath, testContainerName, testImageName, containerConfig, sandboxConfig, imageConfig, nil, config.Runtime{})
	assert.NoError(t, err)
	assert.NotNil(t, spec)
	specCheck(t, testID, testSandboxID, testPid, spec)
	checkMount(t, spec.Mounts, "c:\\test\\host-path", "c:\\test\\container-path", "", []string{"rw"}, nil)
}

func TestMountNamedPipe(t *testing.T) {
	testID := "test-id"
	testSandboxID := "sandbox-id"
	testContainerName := "container-name"
	testPid := uint32(1234)
	nsPath := "test-cni"
	c := newTestCRIService()

	containerConfig, sandboxConfig, imageConfig, specCheck := getCreateContainerTestData()
	containerConfig.Mounts = append(containerConfig.Mounts, &runtime.Mount{
		ContainerPath: `\\.\pipe\foo`,
		HostPath:      `\\.\pipe\foo`,
	})
	spec, err := c.containerSpec(testID, testSandboxID, testPid, nsPath, testContainerName, testImageName, containerConfig, sandboxConfig, imageConfig, nil, config.Runtime{})
	assert.NoError(t, err)
	assert.NotNil(t, spec)
	specCheck(t, testID, testSandboxID, testPid, spec)
	checkMount(t, spec.Mounts, `\\.\pipe\foo`, `\\.\pipe\foo`, "", []string{"rw"}, nil)
}

func TestHostProcessRequirements(t *testing.T) {
	testID := "test-id"
	testSandboxID := "sandbox-id"
	testContainerName := "container-name"
	testPid := uint32(1234)
	containerConfig, sandboxConfig, imageConfig, _ := getCreateContainerTestData()
	ociRuntime := config.Runtime{}
	c := newTestCRIService()
	for desc, test := range map[string]struct {
		containerHostProcess bool
		sandboxHostProcess   bool
		expectError          bool
	}{
		"hostprocess container in non-hostprocess sandbox should fail": {
			containerHostProcess: true,
			sandboxHostProcess:   false,
			expectError:          true,
		},
		"hostprocess container in hostprocess sandbox should be fine": {
			containerHostProcess: true,
			sandboxHostProcess:   true,
			expectError:          false,
		},
		"non-hostprocess container in hostprocess sandbox should fail": {
			containerHostProcess: false,
			sandboxHostProcess:   true,
			expectError:          true,
		},
		"non-hostprocess container in non-hostprocess sandbox should be fine": {
			containerHostProcess: false,
			sandboxHostProcess:   false,
			expectError:          false,
		},
	} {
		t.Run(desc, func(t *testing.T) {
			containerConfig.Windows.SecurityContext.HostProcess = test.containerHostProcess
			sandboxConfig.Windows.SecurityContext = &runtime.WindowsSandboxSecurityContext{
				HostProcess: test.sandboxHostProcess,
			}
			_, err := c.containerSpec(testID, testSandboxID, testPid, "", testContainerName, testImageName, containerConfig, sandboxConfig, imageConfig, nil, ociRuntime)
			if test.expectError {
				assert.Error(t, err)
			} else {
				assert.NoError(t, err)
			}
		})
	}
}
