/*
Copyright 2023 The K8sGPT 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 analyzer

import (
	"context"
	"testing"

	"github.com/k8sgpt-ai/k8sgpt/pkg/common"
	"github.com/k8sgpt-ai/k8sgpt/pkg/kubernetes"
	"github.com/magiconair/properties/assert"
	v1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/client-go/kubernetes/fake"
)

func TestPodAnalyzer(t *testing.T) {

	clientset := fake.NewSimpleClientset(
		&v1.Pod{
			ObjectMeta: metav1.ObjectMeta{
				Name:        "example",
				Namespace:   "default",
				Annotations: map[string]string{},
			},
			Status: v1.PodStatus{
				Phase: v1.PodPending,
				Conditions: []v1.PodCondition{
					{
						Type:    v1.PodScheduled,
						Reason:  "Unschedulable",
						Message: "0/1 nodes are available: 1 node(s) had taint {node-role.kubernetes.io/master: }, that the pod didn't tolerate.",
					},
				},
			},
		},
		&v1.Pod{
			ObjectMeta: metav1.ObjectMeta{
				Name:      "example2",
				Namespace: "default",
			},
			Status: v1.PodStatus{
				Phase: v1.PodRunning,
				ContainerStatuses: []v1.ContainerStatus{
					{
						Name:  "example2",
						Ready: false,
					},
				},
				Conditions: []v1.PodCondition{
					{
						Type:    v1.ContainersReady,
						Reason:  "ContainersNotReady",
						Message: "containers with unready status: [example2]",
					},
				},
			},
		},
		// simulate event: 30s         Warning   Unhealthy              pod/my-nginx-7fb4dbcf47-4ch4w                         Readiness probe failed: bash: xxxx: command not found
		&v1.Event{
			ObjectMeta: metav1.ObjectMeta{
				Name:      "foo",
				Namespace: "default",
			},
			InvolvedObject: v1.ObjectReference{
				Kind:       "Pod",
				Name:       "example2",
				Namespace:  "default",
				UID:        "differentUid",
				APIVersion: "v1",
			},
			Reason:  "Unhealthy",
			Message: "readiness probe failed: the detail reason here ...",
			Source:  v1.EventSource{Component: "eventTest"},
			Count:   1,
			Type:    v1.EventTypeWarning,
		})

	config := common.Analyzer{
		Client: &kubernetes.Client{
			Client: clientset,
		},
		Context:   context.Background(),
		Namespace: "default",
	}
	podAnalyzer := PodAnalyzer{}
	var analysisResults []common.Result
	analysisResults, err := podAnalyzer.Analyze(config)
	if err != nil {
		t.Error(err)
	}
	assert.Equal(t, len(analysisResults), 2)
}

func TestPodAnalyzerNamespaceFiltering(t *testing.T) {

	clientset := fake.NewSimpleClientset(
		&v1.Pod{
			ObjectMeta: metav1.ObjectMeta{
				Name:        "example",
				Namespace:   "default",
				Annotations: map[string]string{},
			},
			Status: v1.PodStatus{
				Phase: v1.PodPending,
				Conditions: []v1.PodCondition{
					{
						Type:    v1.PodScheduled,
						Reason:  "Unschedulable",
						Message: "0/1 nodes are available: 1 node(s) had taint {node-role.kubernetes.io/master: }, that the pod didn't tolerate.",
					},
				},
			},
		},
		&v1.Pod{
			ObjectMeta: metav1.ObjectMeta{
				Name:        "example",
				Namespace:   "other-namespace",
				Annotations: map[string]string{},
			},
			Status: v1.PodStatus{
				Phase: v1.PodPending,
				Conditions: []v1.PodCondition{
					{
						Type:    v1.PodScheduled,
						Reason:  "Unschedulable",
						Message: "0/1 nodes are available: 1 node(s) had taint {node-role.kubernetes.io/master: }, that the pod didn't tolerate.",
					},
				},
			},
		})

	config := common.Analyzer{
		Client: &kubernetes.Client{
			Client: clientset,
		},
		Context:   context.Background(),
		Namespace: "default",
	}
	podAnalyzer := PodAnalyzer{}
	var analysisResults []common.Result
	analysisResults, err := podAnalyzer.Analyze(config)
	if err != nil {
		t.Error(err)
	}
	assert.Equal(t, len(analysisResults), 1)
}