package kubernetes

import (
	"github.com/up9inc/mizu/shared"
	core "k8s.io/api/core/v1"
	"regexp"
)

func GetNodeHostToTappedPodIpsMap(tappedPods []core.Pod) map[string][]string {
	nodeToTappedPodIPMap := make(map[string][]string, 0)
	for _, pod := range tappedPods {
		existingList := nodeToTappedPodIPMap[pod.Spec.NodeName]
		if existingList == nil {
			nodeToTappedPodIPMap[pod.Spec.NodeName] = []string{pod.Status.PodIP}
		} else {
			nodeToTappedPodIPMap[pod.Spec.NodeName] = append(nodeToTappedPodIPMap[pod.Spec.NodeName], pod.Status.PodIP)
		}
	}
	return nodeToTappedPodIPMap
}

func excludeMizuPods(pods []core.Pod) []core.Pod {
	mizuPrefixRegex := regexp.MustCompile("^" + MizuResourcesPrefix)

	nonMizuPods := make([]core.Pod, 0)
	for _, pod := range pods {
		if !mizuPrefixRegex.MatchString(pod.Name) {
			nonMizuPods = append(nonMizuPods, pod)
		}
	}

	return nonMizuPods
}

func getPodArrayDiff(oldPods []core.Pod, newPods []core.Pod) (added []core.Pod, removed []core.Pod) {
	added = getMissingPods(newPods, oldPods)
	removed = getMissingPods(oldPods, newPods)

	return added, removed
}

//returns pods present in pods1 array and missing in pods2 array
func getMissingPods(pods1 []core.Pod, pods2 []core.Pod) []core.Pod {
	missingPods := make([]core.Pod, 0)
	for _, pod1 := range pods1 {
		var found = false
		for _, pod2 := range pods2 {
			if pod1.UID == pod2.UID {
				found = true
				break
			}
		}
		if !found {
			missingPods = append(missingPods, pod1)
		}
	}
	return missingPods
}

func GetPodInfosForPods(pods []core.Pod) []shared.PodInfo {
	podInfos := make([]shared.PodInfo, 0)
	for _, pod := range pods {
		podInfos = append(podInfos, shared.PodInfo{Name: pod.Name, Namespace: pod.Namespace, NodeName: pod.Spec.NodeName})
	}
	return podInfos
}