// agent_cli_kubernetes.go - Agent CLI Kubernetes 模式 WebSocket 支持 // Logan.Li
package controller

import (
	"fmt"
	"strings"

	"github.com/gin-gonic/gin"
	"gorm.io/gorm"

	"ezops/model"
	k8sclient "ezops/pkg/kubernetesclient"
)

// kubernetesAgentContext Kubernetes 模式运行上下文 // Logan.Li
type kubernetesAgentContext struct {
	cluster   model.KubernetesCluster
	client    *k8sclient.Client
	namespace string
	podName   string
	container string
}

// parseKubernetesWSParams 从 WS 查询参数解析 Kubernetes 目标 // Logan.Li
func parseKubernetesWSParams(c *gin.Context) (clusterCode, namespace, podName, container string) {
	clusterCode = strings.TrimSpace(c.Query("cluster"))
	namespace = strings.TrimSpace(c.Query("namespace"))
	podName = strings.TrimSpace(c.Query("pod"))
	container = strings.TrimSpace(c.Query("container"))
	return
}

// loadKubernetesAgentContext 加载集群客户端并预检 // Logan.Li
func loadKubernetesAgentContext(db *gorm.DB, clusterCode, namespace, podName string) (*kubernetesAgentContext, error) {
	if clusterCode == "" {
		return nil, fmt.Errorf("缺少 cluster 参数")
	}
	if namespace == "" {
		return nil, fmt.Errorf("缺少 namespace 参数")
	}
	var cluster model.KubernetesCluster
	if err := db.Where("code = ?", clusterCode).First(&cluster).Error; err != nil {
		return nil, fmt.Errorf("集群不存在: %s", clusterCode)
	}
	client, err := buildK8sClient(&cluster)
	if err != nil {
		return nil, fmt.Errorf("集群连接失败: %w", err)
	}
	if _, err := client.ListNamespaces(); err != nil {
		return nil, fmt.Errorf("集群 API 不可达: %w", err)
	}
	if podName != "" {
		pods, err := client.ListPods()
		if err != nil {
			return nil, fmt.Errorf("获取 Pod 列表失败: %w", err)
		}
		found := false
		for _, p := range pods.Items {
			if p.Metadata.Namespace == namespace && p.Metadata.Name == podName {
				found = true
				break
			}
		}
		if !found {
			return nil, fmt.Errorf("Pod %s/%s 不存在", namespace, podName)
		}
	}
	return &kubernetesAgentContext{
		cluster: cluster, client: client,
		namespace: namespace, podName: podName,
	}, nil
}

// buildKubernetesTargetInfo 构建注入 Prompt 的集群上下文摘要 // Logan.Li
func buildKubernetesTargetInfo(ctx *kubernetesAgentContext) string {
	var sb strings.Builder
	sb.WriteString(fmt.Sprintf("集群: %s（code=%s）| Namespace: %s", ctx.cluster.Name, ctx.cluster.Code, ctx.namespace))
	if ctx.podName != "" {
		sb.WriteString(fmt.Sprintf(" | Pod: %s", ctx.podName))
		if pods, err := ctx.client.ListPods(); err == nil {
			for _, p := range pods.Items {
				if p.Metadata.Namespace == ctx.namespace && p.Metadata.Name == ctx.podName {
					image := ""
					if len(p.Spec.Containers) > 0 {
						image = p.Spec.Containers[0].Image
						if ctx.container == "" {
							ctx.container = p.Spec.Containers[0].Name
						}
					}
					sb.WriteString(fmt.Sprintf(" | 状态: %s | 节点: %s | 镜像: %s", p.Status.Phase, p.Spec.NodeName, image))
					break
				}
			}
		}
	} else {
		sb.WriteString(" | Pod: （未选定，集群/命名空间级任务）")
	}
	if ctx.container != "" {
		sb.WriteString(fmt.Sprintf(" | 容器: %s", ctx.container))
	}
	return sb.String()
}

// kubernetesEvolveHostKey Evolver 记忆分桶键 // Logan.Li
func kubernetesEvolveHostKey(ctx *kubernetesAgentContext) string {
	base := fmt.Sprintf("kubernetes://%s/%s", ctx.cluster.Code, ctx.namespace)
	if ctx.podName != "" {
		return base + "/" + ctx.podName
	}
	return base
}