/*
Copyright 2020 The Rook Authors. 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 controller

import (
	ctx "context"
	"os"
	"testing"
	"time"

	cephv1 "github.com/rook/rook/pkg/apis/ceph.rook.io/v1"
	"github.com/rook/rook/pkg/client/clientset/versioned/scheme"
	"github.com/rook/rook/pkg/util/exec"
	"github.com/stretchr/testify/assert"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/types"
	"sigs.k8s.io/controller-runtime/pkg/client/fake"
)

func CreateTestClusterFromStatusDetails(details map[string]cephv1.CephHealthMessage) cephv1.CephCluster {
	return cephv1.CephCluster{
		Status: cephv1.ClusterStatus{
			CephStatus: &cephv1.CephStatus{
				Details: details,
			},
		},
	}
}

func TestCanIgnoreHealthErrStatusInReconcile(t *testing.T) {
	cluster := CreateTestClusterFromStatusDetails(map[string]cephv1.CephHealthMessage{
		"MDS_ALL_DOWN": {
			Severity: "HEALTH_ERR",
			Message:  "mds all down error",
		},
		"MGR_MODULE_ERROR": {
			Severity: "HEALTH_ERR",
			Message:  "mgr module error",
		},
		"TEST_OTHER": {
			Severity: "HEALTH_WARN",
			Message:  "TEST_OTHER",
		},
		"TEST_ANOTHER": {
			Severity: "HEALTH_OK",
			Message:  "TEST_ANOTHER",
		},
	})
	assert.True(t, canIgnoreHealthErrStatusInReconcile(cluster, "controller"))

	cluster = CreateTestClusterFromStatusDetails(map[string]cephv1.CephHealthMessage{
		"MGR_MODULE_ERROR": {
			Severity: "HEALTH_ERR",
			Message:  "mgr module error",
		},
	})
	assert.True(t, canIgnoreHealthErrStatusInReconcile(cluster, "controller"))

	cluster = CreateTestClusterFromStatusDetails(map[string]cephv1.CephHealthMessage{
		"MGR_MODULE_ERROR_FALSE": {
			Severity: "HEALTH_ERR",
			Message:  "mgr module error",
		},
	})
	assert.False(t, canIgnoreHealthErrStatusInReconcile(cluster, "controller"))

	cluster = CreateTestClusterFromStatusDetails(map[string]cephv1.CephHealthMessage{
		"MDS_ALL_DOWN": {
			Severity: "HEALTH_ERR",
			Message:  "MDS_ALL_DOWN",
		},
		"TEST_UNIGNORABLE": {
			Severity: "HEALTH_ERR",
			Message:  "TEST_UNIGNORABLE",
		},
	})
	assert.False(t, canIgnoreHealthErrStatusInReconcile(cluster, "controller"))

	cluster = CreateTestClusterFromStatusDetails(map[string]cephv1.CephHealthMessage{
		"TEST_UNIGNORABLE": {
			Severity: "HEALTH_ERR",
			Message:  "TEST_UNIGNORABLE",
		},
	})
	assert.False(t, canIgnoreHealthErrStatusInReconcile(cluster, "controller"))

	// The empty status should return false
	cluster = CreateTestClusterFromStatusDetails(map[string]cephv1.CephHealthMessage{})
	assert.False(t, canIgnoreHealthErrStatusInReconcile(cluster, "controller"))
}

func TestSetCephCommandsTimeout(t *testing.T) {
	defer os.Unsetenv("ROOK_CEPH_COMMANDS_TIMEOUT_SECONDS")

	SetCephCommandsTimeout()
	assert.Equal(t, 15*time.Second, exec.CephCommandsTimeout)

	exec.CephCommandsTimeout = 0
	os.Setenv("ROOK_CEPH_COMMANDS_TIMEOUT_SECONDS", "0")
	SetCephCommandsTimeout()
	assert.Equal(t, 15*time.Second, exec.CephCommandsTimeout)

	exec.CephCommandsTimeout = 0
	os.Setenv("ROOK_CEPH_COMMANDS_TIMEOUT_SECONDS", "1")
	SetCephCommandsTimeout()
	assert.Equal(t, 1*time.Second, exec.CephCommandsTimeout)
}

func TestSetAllowLoopDevices(t *testing.T) {
	defer os.Unsetenv("ROOK_CEPH_ALLOW_LOOP_DEVICES")

	SetAllowLoopDevices()
	assert.False(t, LoopDevicesAllowed())

	os.Setenv("ROOK_CEPH_ALLOW_LOOP_DEVICES", "foo")
	SetAllowLoopDevices()
	assert.False(t, LoopDevicesAllowed())

	os.Setenv("ROOK_CEPH_ALLOW_LOOP_DEVICES", "false")
	SetAllowLoopDevices()
	assert.False(t, LoopDevicesAllowed())

	os.Setenv("ROOK_CEPH_ALLOW_LOOP_DEVICES", "true")
	SetAllowLoopDevices()
	assert.True(t, LoopDevicesAllowed())
}

func TestSetEnforceHostNetwork(t *testing.T) {
	defer os.Unsetenv(enforceHostNetworkSettingName)

	logger.Infof("testing default value for %v", enforceHostNetworkSettingName)
	SetEnforceHostNetwork()
	assert.False(t, EnforceHostNetwork())

	// test invalid setting
	value := "foo"
	logger.Infof("testing invalid value'%v' for %v", value, enforceHostNetworkSettingName)
	os.Setenv(enforceHostNetworkSettingName, value)
	SetEnforceHostNetwork()
	assert.False(t, EnforceHostNetwork())

	// test valid settings
	value = "true"
	logger.Infof("testing valid value'%v' for %v", value, enforceHostNetworkSettingName)
	os.Setenv(enforceHostNetworkSettingName, value)
	SetEnforceHostNetwork()
	assert.True(t, EnforceHostNetwork())

	value = "false"
	logger.Infof("testing valid value'%v' for %v", value, enforceHostNetworkSettingName)
	os.Setenv(enforceHostNetworkSettingName, value)
	SetEnforceHostNetwork()
	assert.False(t, EnforceHostNetwork())
}

func TestSetRevisionHistoryLimit(t *testing.T) {
	defer os.Unsetenv(revisionHistoryLimitSettingName)

	t.Run("ROOK_REVISION_HISTORY_LIMIT: test default value", func(t *testing.T) {
		SetRevisionHistoryLimit()
		assert.Nil(t, RevisionHistoryLimit())
	})

	value := "foo"
	t.Run("ROOK_REVISION_HISTORY_LIMIT: test invalid value 'foo'", func(t *testing.T) {
		os.Setenv(revisionHistoryLimitSettingName, value)
		SetRevisionHistoryLimit()
		assert.Nil(t, RevisionHistoryLimit())
	})

	t.Run("ROOK_REVISION_HISTORY_LIMIT: test empty string value", func(t *testing.T) {
		value = ""
		os.Setenv(revisionHistoryLimitSettingName, value)
		SetRevisionHistoryLimit()
		assert.Nil(t, RevisionHistoryLimit())
	})
	t.Run("ROOK_REVISION_HISTORY_LIMIT:  test valig value '10'", func(t *testing.T) {
		value = "10"
		os.Setenv(revisionHistoryLimitSettingName, value)
		SetRevisionHistoryLimit()
		assert.Equal(t, int32(10), *RevisionHistoryLimit())
	})
}

func TestIsReadyToReconcile(t *testing.T) {
	scheme := scheme.Scheme
	scheme.AddKnownTypes(cephv1.SchemeGroupVersion, &cephv1.CephCluster{}, &cephv1.CephClusterList{})

	controllerName := "testing"
	clusterName := types.NamespacedName{Name: "mycluster", Namespace: "myns"}

	t.Run("non-existent cephcluster", func(t *testing.T) {
		client := fake.NewClientBuilder().WithScheme(scheme).WithRuntimeObjects().Build()
		c, ready, clusterExists, reconcileResult := IsReadyToReconcile(ctx.TODO(), client, clusterName, controllerName)
		assert.NotNil(t, c)
		assert.False(t, ready)
		assert.False(t, clusterExists)
		assert.Equal(t, WaitForRequeueIfCephClusterNotReady, reconcileResult)
	})

	t.Run("valid cephcluster", func(t *testing.T) {
		cephCluster := &cephv1.CephCluster{}
		objects := []runtime.Object{cephCluster}
		client := fake.NewClientBuilder().WithScheme(scheme).WithRuntimeObjects(objects...).Build()
		c, ready, clusterExists, reconcileResult := IsReadyToReconcile(ctx.TODO(), client, clusterName, controllerName)
		assert.NotNil(t, c)
		assert.False(t, ready)
		assert.False(t, clusterExists)
		assert.Equal(t, WaitForRequeueIfCephClusterNotReady, reconcileResult)
	})

	t.Run("deleted cephcluster with no cleanup policy", func(t *testing.T) {
		cephCluster := &cephv1.CephCluster{
			ObjectMeta: metav1.ObjectMeta{
				Name:              clusterName.Name,
				Namespace:         clusterName.Namespace,
				DeletionTimestamp: &metav1.Time{Time: time.Now()},
				Finalizers:        []string{"test"},
			},
		}

		objects := []runtime.Object{cephCluster}
		client := fake.NewClientBuilder().WithScheme(scheme).WithRuntimeObjects(objects...).Build()
		c, ready, clusterExists, reconcileResult := IsReadyToReconcile(ctx.TODO(), client, clusterName, controllerName)
		assert.NotNil(t, c)
		assert.False(t, ready)
		assert.True(t, clusterExists)
		assert.Equal(t, WaitForRequeueIfCephClusterNotReady, reconcileResult)
	})

	t.Run("cephcluster with cleanup policy when not deleted", func(t *testing.T) {
		cephCluster := &cephv1.CephCluster{
			ObjectMeta: metav1.ObjectMeta{
				Name:      clusterName.Name,
				Namespace: clusterName.Namespace,
			},
			Spec: cephv1.ClusterSpec{
				CleanupPolicy: cephv1.CleanupPolicySpec{
					Confirmation: cephv1.DeleteDataDirOnHostsConfirmation,
				},
			},
		}
		objects := []runtime.Object{cephCluster}
		client := fake.NewClientBuilder().WithScheme(scheme).WithRuntimeObjects(objects...).Build()
		c, ready, clusterExists, _ := IsReadyToReconcile(ctx.TODO(), client, clusterName, controllerName)
		assert.NotNil(t, c)
		assert.False(t, ready)
		assert.True(t, clusterExists)
	})

	t.Run("cephcluster with cleanup policy when deleted", func(t *testing.T) {
		cephCluster := &cephv1.CephCluster{
			ObjectMeta: metav1.ObjectMeta{
				Name:              clusterName.Name,
				Namespace:         clusterName.Namespace,
				DeletionTimestamp: &metav1.Time{Time: time.Now()},
				Finalizers:        []string{"test"},
			},
			Spec: cephv1.ClusterSpec{
				CleanupPolicy: cephv1.CleanupPolicySpec{
					Confirmation: cephv1.DeleteDataDirOnHostsConfirmation,
				},
			},
		}
		objects := []runtime.Object{cephCluster}
		client := fake.NewClientBuilder().WithScheme(scheme).WithRuntimeObjects(objects...).Build()
		c, ready, clusterExists, _ := IsReadyToReconcile(ctx.TODO(), client, clusterName, controllerName)
		assert.NotNil(t, c)
		assert.False(t, ready)
		assert.False(t, clusterExists)
	})
}

func TestObcAllowAdditionalConfigFields(t *testing.T) {
	tests := []struct {
		name             string
		additionalConfig string
		shouldAllow      []string
		shouldDisallow   []string
	}{
		{
			"not set", "<notset>",
			[]string{"maxObjects", "maxSize"}, // default allowlist is unlikely to need changing EVER
			[]string{"bucketMaxObjects", "bucketMaxSize", "bucketPolicy", "bucketLifecycle", "bucketOwner", "random"},
		},
		{
			"set to empty", "",
			[]string{}, // admin can allow no quota options if desired
			[]string{"maxObjects", "maxSize", "bucketMaxObjects", "bucketMaxSize", "bucketPolicy", "bucketLifecycle", "bucketOwner", "random"},
		},
		{
			"set to default", "maxObjects,maxSize",
			[]string{"maxObjects", "maxSize"},
			[]string{"bucketMaxObjects", "bucketMaxSize", "bucketPolicy", "bucketLifecycle", "bucketOwner", "random"},
		},
		{
			"all quota fields", "maxObjects,maxSize,bucketMaxObjects,bucketMaxSize",
			[]string{"maxObjects", "maxSize", "bucketMaxObjects", "bucketMaxSize"},
			[]string{"bucketPolicy", "bucketLifecycle", "bucketOwner", "random"},
		},
		{
			"all fields", "maxObjects,maxSize,bucketMaxObjects,bucketMaxSize,bucketPolicy,bucketLifecycle,bucketOwner",
			[]string{"maxObjects", "maxSize", "bucketMaxObjects", "bucketMaxSize", "bucketPolicy", "bucketLifecycle", "bucketOwner"},
			[]string{"random"},
		},
		// this mechanism doesn't do any field checking - that isn't it's job - it merely handles
		// allow-listing essentially arbitrary config keys
		{
			"all fields including unknown", "maxObjects,maxSize,bucketMaxObjects,bucketMaxSize,bucketPolicy,bucketLifecycle,bucketOwner,random",
			[]string{"maxObjects", "maxSize", "bucketMaxObjects", "bucketMaxSize", "bucketPolicy", "bucketLifecycle", "bucketOwner", "random"},
			[]string{"otherRandom"},
		},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			if tt.additionalConfig != "<notset>" {
				os.Setenv("ROOK_OBC_ALLOW_ADDITIONAL_CONFIG_FIELDS", tt.additionalConfig)
				defer os.Unsetenv("ROOK_OBC_ALLOW_ADDITIONAL_CONFIG_FIELDS")
			}
			SetObcAllowAdditionalConfigFields()
			for _, toAllow := range tt.shouldAllow {
				assert.True(t, ObcAdditionalConfigKeyIsAllowed(toAllow))
			}
			for _, toDisallow := range tt.shouldDisallow {
				assert.False(t, ObcAdditionalConfigKeyIsAllowed(toDisallow))
			}
		})
	}
}