/*
Copyright 2021 Alibaba Group Holding Limited.

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 helper

import (
	corev1 "k8s.io/api/core/v1"
	"time"
)

func IsPodRunning(pod *corev1.Pod) bool {
	return pod != nil && pod.Status.Phase == corev1.PodRunning
}

func IsPodReady(pod *corev1.Pod) bool {
	if pod == nil {
		return false
	}

	if pod.Status.Phase != corev1.PodRunning {
		return false
	}

	if pod.Status.ContainerStatuses == nil {
		return false
	}

	for _, containerStatus := range pod.Status.ContainerStatuses {
		if !containerStatus.Ready {
			return false
		}
	}

	return true
}

func IsAllPodsReady(pods []corev1.Pod) bool {
	for _, pod := range pods {
		if !IsPodReady(&pod) {
			return false
		}
	}
	return true
}

func GetContainerFromPodSpec(podSpec *corev1.PodSpec, name string) *corev1.Container {
	if podSpec == nil || podSpec.Containers == nil {
		return nil
	}
	for i := range podSpec.Containers {
		c := &podSpec.Containers[i]
		if c.Name == name {
			return c
		}
	}
	return nil
}

func GetContainerFromPod(pod *corev1.Pod, name string) *corev1.Container {
	if pod == nil {
		return nil
	}
	return GetContainerFromPodSpec(&pod.Spec, name)
}

func MustGetContainerFromPod(pod *corev1.Pod, name string) *corev1.Container {
	container := GetContainerFromPod(pod, name)
	if container == nil {
		panic("container not found: " + name)
	}
	return container
}

func IsPodDeletedOrFailed(po *corev1.Pod) bool {
	return IsPodDeleted(po, 32*time.Second) || IsPodFailed(po)
}

func IsPodDeleted(po *corev1.Pod, delaySeconds time.Duration) bool {
	now := time.Now()
	now = now.Add(-delaySeconds)
	return po != nil && !po.DeletionTimestamp.IsZero() && po.DeletionTimestamp.UTC().Before(now)
}

func IsPodFailed(po *corev1.Pod) bool {
	return po != nil && po.Status.Phase == corev1.PodFailed
}

func IsPodScheduled(po *corev1.Pod) bool {
	if po == nil {
		return false
	}
	for _, cond := range po.Status.Conditions {
		if cond.Type == corev1.PodScheduled &&
			cond.Status == corev1.ConditionTrue {
			return true
		}
	}
	return false
}

func FilterPodsBy(pods []corev1.Pod, filter func(pod *corev1.Pod) bool) []corev1.Pod {
	result := make([]corev1.Pod, 0)
	for _, pod := range pods {
		if filter(&pod) {
			result = append(result, pod)
		}
	}
	return result
}

func ArePodsAllReady(pods []corev1.Pod) bool {
	for _, pod := range pods {
		if !IsPodReady(&pod) {
			return false
		}
	}
	return true
}

func ArePodsAllScheduled(pods []corev1.Pod) bool {
	for _, pod := range pods {
		if !IsPodScheduled(&pod) {
			return false
		}
	}
	return true
}

func BuildPodMap(pods []corev1.Pod, keyFunc func(pod *corev1.Pod) string) map[string]*corev1.Pod {
	r := make(map[string]*corev1.Pod)
	for _, pod := range pods {
		r[keyFunc(&pod)] = &pod
	}
	return r
}