// Standalone script: seed K8s Pods/Deployments/Services/Ingresses for existing clusters.
// Usage: go run scripts/seed_k8s_resources.go
//go:build ignore

package main

import (
	"fmt"
	"math/rand"
	"time"

	"ezops/internal/config"
	"ezops/internal/models"
	"ezops/pkg/database"
)

func main() {
	cfg := config.Load()
	db, err := database.New(cfg.Database)
	if err != nil {
		fmt.Printf("DB connection failed: %v\n", err)
		return
	}
	rand.Seed(time.Now().UnixNano())

	var clusters []models.K8sCluster
	db.Find(&clusters)
	if len(clusters) == 0 {
		fmt.Println("No clusters found — run mock.go first")
		return
	}

	depImages := []string{
		"nginx:1.25.3", "redis:7.2-alpine", "mysql:8.0.35",
		"kafka:3.6.0", "elasticsearch:8.11.0", "grafana/grafana:10.2.0",
		"prom/prometheus:v2.48.0", "busybox:1.36", "easzlab/kubeasz:3.6.1",
	}
	depNames := []string{
		"nginx-deploy", "redis-cluster", "mysql-master", "mysql-slave",
		"kafka-broker", "es-cluster", "grafana", "prometheus",
		"filebeat", "logstash", "jaeger", "zipkin",
		"frontend", "backend-api", "gateway",
	}
	namespaces := []string{"default", "kube-system", "monitoring", "ingress-nginx", "production"}
	svcTypes := []string{"ClusterIP", "NodePort", "LoadBalancer"}
	svcNames := []string{
		"nginx-svc", "redis-svc", "mysql-svc", "kafka-svc",
		"es-svc", "grafana-svc", "prometheus-svc",
		"frontend-svc", "backend-svc", "gateway-svc",
	}
	ingNames := []string{"main-ingress", "api-ingress", "grafana-ingress", "canary-ingress"}
	podStatuses := []string{"Running", "Running", "Running", "Running", "Pending", "CrashLoopBackOff"}

	for _, cluster := range clusters {
		// Skip if pods already exist for this cluster
		var podCount int64
		db.Model(&models.K8sPod{}).Where("cluster_id = ?", cluster.ID).Count(&podCount)
		if podCount > 0 {
			fmt.Printf("Cluster %s already has %d pods, skipping\n", cluster.Name, podCount)
			continue
		}

		numNodes := cluster.NodeCount
		if numNodes == 0 {
			numNodes = 3
		}

		// Deployments
		numDeps := 5 + rand.Intn(10)
		if numDeps > len(depNames) {
			numDeps = len(depNames)
		}
		for d := 0; d < numDeps; d++ {
			replicas := []int{1, 2, 3, 5}[rand.Intn(4)]
			available := replicas
			if rand.Intn(4) == 0 {
				available = replicas - 1
			}
			if available < 0 {
				available = 0
			}
			db.Create(&models.K8sDeployment{
				ClusterID:         cluster.ID,
				Namespace:         namespaces[rand.Intn(len(namespaces))],
				Name:              depNames[d],
				Replicas:          replicas,
				AvailableReplicas: available,
				ReadyReplicas:     available,
				Image:             depImages[rand.Intn(len(depImages))],
				Strategy:          "RollingUpdate",
			})
		}

		// Pods
		numPods := 12 + rand.Intn(18)
		for p := 0; p < numPods; p++ {
			db.Create(&models.K8sPod{
				ClusterID:    cluster.ID,
				Namespace:    namespaces[rand.Intn(len(namespaces))],
				Name:         fmt.Sprintf("%s-pod-%d", cluster.Code, p+1),
				Status:       podStatuses[rand.Intn(len(podStatuses))],
				NodeName:     fmt.Sprintf("%s-node-%d", cluster.Code, rand.Intn(numNodes)+1),
				IP:           fmt.Sprintf("10.%d.%d.%d", rand.Intn(256), rand.Intn(256), rand.Intn(256)),
				RestartCount: rand.Intn(10),
				Image:        depImages[rand.Intn(len(depImages))],
				CPUUsage:     rand.Float64() * 500,
				MemoryUsage:  rand.Float64() * 2048,
			})
		}

		// Services
		numSvcs := 5 + rand.Intn(5)
		if numSvcs > len(svcNames) {
			numSvcs = len(svcNames)
		}
		for s := 0; s < numSvcs; s++ {
			svcType := svcTypes[rand.Intn(len(svcTypes))]
			ports := "[]"
			switch rand.Intn(4) {
			case 0:
				ports = `[{"port":80,"protocol":"TCP","targetPort":80}]`
			case 1:
				ports = `[{"port":443,"protocol":"TCP","targetPort":8443}]`
			case 2:
				ports = `[{"port":8080,"protocol":"TCP","targetPort":8080},{"port":9090,"protocol":"TCP","targetPort":9090}]`
			default:
				ports = `[{"port":3306,"protocol":"TCP","targetPort":3306}]`
			}
			svc := models.K8sService{
				ClusterID:  cluster.ID,
				Namespace:  namespaces[rand.Intn(len(namespaces))],
				Name:       svcNames[s],
				Type:       svcType,
				ClusterIP:  fmt.Sprintf("10.96.%d.%d", rand.Intn(256), rand.Intn(256)),
				Ports:      ports,
				Selector:   fmt.Sprintf(`{"app":"%s"}`, svcNames[s]),
			}
			if svcType == "LoadBalancer" {
				svc.ExternalIP = fmt.Sprintf("203.0.113.%d", rand.Intn(256))
			}
			if svcType == "NodePort" {
				svc.ExternalIP = fmt.Sprintf("%d-%d", 30000+rand.Intn(1000), 32767)
			}
			db.Create(&svc)
		}

		// Ingresses
		numIngs := 2 + rand.Intn(3)
		if numIngs > len(ingNames) {
			numIngs = len(ingNames)
		}
		for ig := 0; ig < numIngs; ig++ {
			db.Create(&models.K8sIngress{
				ClusterID: cluster.ID,
				Namespace: namespaces[rand.Intn(len(namespaces))],
				Name:      ingNames[ig],
				Hosts:     fmt.Sprintf(`["%s.ezops.local"]`, ingNames[ig]),
				Backend:   fmt.Sprintf("%s-svc:80", ingNames[ig]),
				TLS:       rand.Intn(2) == 0,
			})
		}

		// Update cluster counts to match actual data
		var depCnt, podCnt, svcCnt int64
		db.Model(&models.K8sDeployment{}).Where("cluster_id = ?", cluster.ID).Count(&depCnt)
		db.Model(&models.K8sPod{}).Where("cluster_id = ?", cluster.ID).Count(&podCnt)
		db.Model(&models.K8sService{}).Where("cluster_id = ?", cluster.ID).Count(&svcCnt)
		db.Model(&cluster).Updates(map[string]interface{}{
			"deployment_count": depCnt,
		})

		fmt.Printf("Cluster %s: +%d deployments, +%d pods, +%d services, +%d ingresses\n",
			cluster.Name, numDeps, numPods, numSvcs, numIngs)
	}
	fmt.Println("K8s resources seeded successfully!")
}