// K8s 集群列表统计增强 — 实时拉取资源数量，修复 Ingress 等与详情页不一致 // Logan.Li
package controller

import (
	"log"

	"ezops/model"
)

// enrichClustersForList 列表返回前刷新资源计数与节点均值使用率 // Logan.Li
func (h *KubernetesHandler) enrichClustersForList(clusters []model.KubernetesCluster) {
	for i := range clusters {
		c := &clusters[i]
		h.fillClusterCountsFromDB(c)
		h.refreshClusterCountsLive(c)
		h.fillClusterUsageFromNodes(c)
		// 异步落库，避免列表阻塞过久
		snap := *c
		go func(cluster model.KubernetesCluster) {
			if err := h.db.Model(&model.KubernetesCluster{}).Where("id = ?", cluster.ID).Updates(map[string]interface{}{
				"node_count":       cluster.NodeCount,
				"pod_count":        cluster.PodCount,
				"service_count":    cluster.ServiceCount,
				"deployment_count": cluster.DeploymentCount,
				"ingress_count":    cluster.IngressCount,
				"cpu_usage":        cluster.CPUUsage,
				"memory_usage":     cluster.MemoryUsage,
			}).Error; err != nil {
				log.Printf("[K8s] enrich cluster %d stats persist error: %v", cluster.ID, err)
			}
		}(snap)
	}
}

func (h *KubernetesHandler) fillClusterCountsFromDB(c *model.KubernetesCluster) {
	var nodes, pods, svcs, deps, ings int64
	h.db.Model(&model.KubernetesNode{}).Where("cluster_id = ?", c.ID).Count(&nodes)
	h.db.Model(&model.KubernetesPod{}).Where("cluster_id = ?", c.ID).Count(&pods)
	h.db.Model(&model.KubernetesService{}).Where("cluster_id = ?", c.ID).Count(&svcs)
	h.db.Model(&model.KubernetesDeployment{}).Where("cluster_id = ?", c.ID).Count(&deps)
	h.db.Model(&model.KubernetesIngress{}).Where("cluster_id = ?", c.ID).Count(&ings)
	if nodes > 0 {
		c.NodeCount = int(nodes)
	}
	if pods > 0 {
		c.PodCount = int(pods)
	}
	if svcs > 0 {
		c.ServiceCount = int(svcs)
	}
	if deps > 0 {
		c.DeploymentCount = int(deps)
	}
	if ings > 0 {
		c.IngressCount = int(ings)
	}
}

func (h *KubernetesHandler) refreshClusterCountsLive(c *model.KubernetesCluster) {
	client, err := buildK8sClient(c)
	if err != nil {
		return
	}
	if nodes, err := client.ListNodes(); err == nil {
		c.NodeCount = len(nodes.Items)
	}
	if pods, err := client.ListPods(); err == nil {
		c.PodCount = len(pods.Items)
	}
	if deps, err := client.ListDeployments(); err == nil {
		c.DeploymentCount = len(deps.Items)
	}
	if svcs, err := client.ListServices(); err == nil {
		c.ServiceCount = len(svcs.Items)
	}
	if ings, err := client.ListIngresses(); err == nil {
		c.IngressCount = len(ings.Items)
	} else {
		log.Printf("[K8s] list ingresses for cluster %s error: %v", c.Code, err)
	}
}

func (h *KubernetesHandler) fillClusterUsageFromNodes(c *model.KubernetesCluster) {
	var avgCPU, avgMem float64
	row := h.db.Model(&model.KubernetesNode{}).Where("cluster_id = ?", c.ID).
		Select("COALESCE(AVG(cpu_usage), 0), COALESCE(AVG(memory_usage), 0)").Row()
	if row != nil {
		_ = row.Scan(&avgCPU, &avgMem)
	}
	if avgCPU > 0 {
		c.CPUUsage = avgCPU
	}
	if avgMem > 0 {
		c.MemoryUsage = avgMem
	}
}

// updateClusterUsageAfterSync 同步后根据节点指标写回集群 CPU/内存均值 // Logan.Li
func (h *KubernetesHandler) updateClusterUsageAfterSync(clusterID uint) {
	var cluster model.KubernetesCluster
	cluster.ID = clusterID
	h.fillClusterUsageFromNodes(&cluster)
	if cluster.CPUUsage > 0 || cluster.MemoryUsage > 0 {
		h.db.Model(&model.KubernetesCluster{}).Where("id = ?", clusterID).Updates(map[string]interface{}{
			"cpu_usage":    cluster.CPUUsage,
			"memory_usage": cluster.MemoryUsage,
		})
	}
}