package controller

import (
	"net/http"
	"strconv"

	"ezops/model"

	"github.com/gin-gonic/gin"
)

func (h *KubernetesHandler) ListServices(c *gin.Context) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	namespace := c.Query("namespace")

	client, _, err := h.getK8sClient(clusterID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{Code: 500, Message: err.Error()})
		return
	}
	svcs, err := client.ListServices()
	if err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{Code: 500, Message: "K8s API error: " + err.Error()})
		return
	}

	type SvcSummary struct {
		Namespace string `json:"namespace"`
		Name      string `json:"name"`
		Type      string `json:"type"`
		ClusterIP string `json:"cluster_ip"`
		Ports     int    `json:"port_count"`
	}
	result := []SvcSummary{}
	for _, s := range svcs.Items {
		if namespace != "" && s.Metadata.Namespace != namespace {
			continue
		}
		result = append(result, SvcSummary{
			Namespace: s.Metadata.Namespace,
			Name:      s.Metadata.Name,
			Type:      s.Spec.Type,
			ClusterIP: s.Spec.ClusterIP,
			Ports:     len(s.Spec.Ports),
		})
	}
	c.JSON(http.StatusOK, model.Response{Code: 200, Message: "success", Data: result})
}

// ListIngresses 获取Ingress列表
// @Summary 获取Ingress列表
// @Description 获取指定集群的Ingress列表
// @Tags K8s集群
// @Produce json
// @Security Bearer
// @Param id path int true "集群ID"
// @Param namespace query string false "命名空间"
// @Success 200 {object} model.Response{data=[]model.KubernetesIngress}
// @Router /kubernetes-clusters/{id}/ingresses [get]
func (h *KubernetesHandler) ListIngresses(c *gin.Context) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	namespace := c.Query("namespace")

	client, _, err := h.getK8sClient(clusterID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{Code: 500, Message: err.Error()})
		return
	}
	ings, err := client.ListIngresses()
	if err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{Code: 500, Message: "K8s API error: " + err.Error()})
		return
	}

	type IngSummary struct {
		Namespace string   `json:"namespace"`
		Name      string   `json:"name"`
		Hosts     []string `json:"hosts"`
		TLS       bool     `json:"tls"`
	}
	result := []IngSummary{}
	for _, ing := range ings.Items {
		if namespace != "" && ing.Metadata.Namespace != namespace {
			continue
		}
		hosts := []string{}
		for _, rule := range ing.Spec.Rules {
			if rule.Host != "" {
				hosts = append(hosts, rule.Host)
			}
		}
		result = append(result, IngSummary{
			Namespace: ing.Metadata.Namespace,
			Name:      ing.Metadata.Name,
			Hosts:     hosts,
			TLS:       len(ing.Spec.TLS) > 0,
		})
	}
	c.JSON(http.StatusOK, model.Response{Code: 200, Message: "success", Data: result})
}

// GetTopology 获取集群拓扑布局 // Logan.Li
func (h *KubernetesHandler) GetTopology(c *gin.Context) {
	clusterID := c.Param("id")
	var layout model.TopologyLayout
	result := h.db.Where("cluster_id = ?", clusterID).First(&layout)
	if result.Error != nil {
		c.JSON(http.StatusOK, model.Response{Code: 200, Data: &model.TopologyLayout{}})
		return
	}
	c.JSON(http.StatusOK, model.Response{Code: 200, Data: layout})
}

// SaveTopology 保存集群拓扑布局 // Logan.Li
func (h *KubernetesHandler) SaveTopology(c *gin.Context) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	var req struct {
		LayoutData string `json:"layout_data"`
	}
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, model.Response{Code: 400, Message: "参数错误"})
		return
	}

	var layout model.TopologyLayout
	h.db.Where("cluster_id = ?", clusterID).First(&layout)
	layout.ClusterID = uint(clusterID)
	layout.LayoutData = req.LayoutData
	if layout.ID == 0 {
		h.db.Create(&layout)
	} else {
		h.db.Save(&layout)
	}

	c.JSON(http.StatusOK, model.Response{Code: 200, Message: "保存成功"})
}


// SyncCluster 同步集群资源（连接真实K8s API拉取数据）
func (h *KubernetesHandler) ListConfigMaps(c *gin.Context) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	if clusterID == 0 {
		clusterID = h.resolveClusterCode(c.Param("clusterCode"))
	}
	namespace := c.Param("namespace")

	client, _, err := h.getK8sClient(clusterID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{Code: 500, Message: err.Error()})
		return
	}

	cms, err := client.ListConfigMaps(namespace)
	if err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{Code: 500, Message: "K8s API error: " + err.Error()})
		return
	}

	// 扁平化字段，与前端表格列 name/namespace/key_count 对齐 // Logan.Li
	type CMSummary struct {
		Namespace string `json:"namespace"`
		Name      string `json:"name"`
		KeyCount  int    `json:"key_count"`
	}
	result := make([]CMSummary, 0, len(cms.Items))
	for _, cm := range cms.Items {
		result = append(result, CMSummary{
			Namespace: cm.Metadata.Namespace,
			Name:      cm.Metadata.Name,
			KeyCount:  len(cm.Data),
		})
	}
	c.JSON(http.StatusOK, model.Response{Code: 200, Data: result})
}

// ListSecrets 获取命名空间下的 Secret 列表（仅名称+类型，不含值）
func (h *KubernetesHandler) ListSecrets(c *gin.Context) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	if clusterID == 0 {
		clusterID = h.resolveClusterCode(c.Param("clusterCode"))
	}
	namespace := c.Param("namespace")

	client, _, err := h.getK8sClient(clusterID)
	if err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{Code: 500, Message: err.Error()})
		return
	}

	secrets, err := client.ListSecrets(namespace)
	if err != nil {
		c.JSON(http.StatusInternalServerError, model.Response{Code: 500, Message: "K8s API error: " + err.Error()})
		return
	}

	// 扁平化字段，与前端表格列 name/namespace/type 对齐 // Logan.Li
	type SecretSummary struct {
		Namespace string `json:"namespace"`
		Name      string `json:"name"`
		Type      string `json:"type"`
		KeyCount  int    `json:"key_count"`
	}
	result := make([]SecretSummary, 0, len(secrets.Items))
	for _, s := range secrets.Items {
		result = append(result, SecretSummary{
			Namespace: s.Metadata.Namespace,
			Name:      s.Metadata.Name,
			Type:      s.Type,
			KeyCount:  len(s.DataKeys),
		})
	}
	c.JSON(http.StatusOK, model.Response{Code: 200, Data: result})
}

// ============================================================================
// Helpers
// ============================================================================

// resolveClusterCode resolves a cluster code to its numeric ID
func (h *KubernetesHandler) ListServicesNS(c *gin.Context) {
	h.listServicesWithNS(c, c.Param("namespace"))
}
func (h *KubernetesHandler) ListIngressesNS(c *gin.Context) {
	h.listIngressesWithNS(c, c.Param("namespace"))
}
func (h *KubernetesHandler) listServicesWithNS(c *gin.Context, ns string) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	if clusterID == 0 { clusterID = h.resolveClusterCode(c.Param("clusterCode")) }
	client, _, err := h.getK8sClient(clusterID)
	if err != nil { c.JSON(500, model.Response{Code: 500, Message: err.Error()}); return }
	svcs, err := client.ListServices()
	if err != nil { c.JSON(500, model.Response{Code: 500, Message: "K8s API error: " + err.Error()}); return }
	type SvcPortDetail struct {
		Name       string      `json:"name,omitempty"`
		Port       int         `json:"port"`
		TargetPort interface{} `json:"targetPort"`
		NodePort   int         `json:"nodePort,omitempty"`
		Protocol   string      `json:"protocol,omitempty"`
	}
	type SvcSummary struct {
		Namespace  string            `json:"namespace"`
		Name       string            `json:"name"`
		Type       string            `json:"type"`
		ClusterIP  string            `json:"cluster_ip"`
		Ports      int               `json:"ports"`
		PortList   []SvcPortDetail   `json:"portList,omitempty"`
		Selector   map[string]string `json:"selector,omitempty"`
	}
	result := []SvcSummary{}
	for _, s := range svcs.Items {
		if s.Metadata.Namespace != ns { continue }
		ports := []SvcPortDetail{}
		for _, p := range s.Spec.Ports {
			ports = append(ports, SvcPortDetail{
				Name: p.Name, Port: p.Port, TargetPort: p.TargetPort,
				NodePort: p.NodePort, Protocol: p.Protocol,
			})
		}
		result = append(result, SvcSummary{
			Namespace:  s.Metadata.Namespace,
			Name:       s.Metadata.Name,
			Type:       s.Spec.Type,
			ClusterIP:  s.Spec.ClusterIP,
			Ports:      len(s.Spec.Ports),
			PortList:   ports,
			Selector:   s.Spec.Selector,
		})
	}
	c.JSON(200, model.Response{Code: 200, Data: result})
}
func (h *KubernetesHandler) listIngressesWithNS(c *gin.Context, ns string) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	if clusterID == 0 { clusterID = h.resolveClusterCode(c.Param("clusterCode")) }
	client, _, err := h.getK8sClient(clusterID)
	if err != nil { c.JSON(500, model.Response{Code: 500, Message: err.Error()}); return }
	ings, err := client.ListIngresses()
	if err != nil { c.JSON(500, model.Response{Code: 500, Message: "K8s API error: " + err.Error()}); return }
	type PathDetail struct {
		Path       string `json:"path"`
		PathType   string `json:"pathType,omitempty"`
		BackendSvc string `json:"backendService,omitempty"`
		BackendPort string `json:"backendPort,omitempty"`
	}
	type RuleDetail struct {
		Host  string       `json:"host"`
		Paths []PathDetail `json:"paths"`
	}
	type IngSummary struct {
		Namespace      string      `json:"namespace"`
		Name           string      `json:"name"`
		Hosts          []string    `json:"hosts"`
		TLS            bool        `json:"tls"`
		IngressClass   string      `json:"ingressClass,omitempty"`
		Rules          []RuleDetail `json:"rules,omitempty"`
	}
	result := []IngSummary{}
	for _, ing := range ings.Items {
		if ing.Metadata.Namespace != ns { continue }
		hosts := []string{}
		rules := []RuleDetail{}
		for _, rule := range ing.Spec.Rules {
			if rule.Host != "" { hosts = append(hosts, rule.Host) }
			rd := RuleDetail{Host: rule.Host, Paths: []PathDetail{}}
			if rule.HTTP != nil {
				for _, p := range rule.HTTP.Paths {
					pd := PathDetail{Path: p.Path, PathType: p.PathType, BackendSvc: p.Backend.Service.Name}
					if p.Backend.Service.Port.Number > 0 {
						pd.BackendPort = strconv.Itoa(p.Backend.Service.Port.Number)
					} else if p.Backend.Service.Port.Name != "" {
						pd.BackendPort = p.Backend.Service.Port.Name
					}
					rd.Paths = append(rd.Paths, pd)
				}
			}
			rules = append(rules, rd)
		}
		// ingressClassName from annotations
		ingClass := ""
		if ing.Metadata.Annotations != nil {
			ingClass = ing.Metadata.Annotations["kubernetes.io/ingress.class"]
		}
		result = append(result, IngSummary{
			Namespace:    ing.Metadata.Namespace,
			Name:         ing.Metadata.Name,
			Hosts:        hosts,
			TLS:          len(ing.Spec.TLS) > 0,
			IngressClass: ingClass,
			Rules:        rules,
		})
	}
	c.JSON(200, model.Response{Code: 200, Data: result})
}
func (h *KubernetesHandler) ListPVCsNS(c *gin.Context) {
	clusterID := h.resolveClusterCode(c.Param("clusterCode"))
	if clusterID == 0 { c.JSON(500, model.Response{Code: 500, Message: "cluster not found"}); return }
	client, _, err := h.getK8sClient(clusterID)
	if err != nil { c.JSON(500, model.Response{Code: 500, Message: err.Error()}); return }
	ns := c.Param("namespace")
	pvcs, err := client.ListPVCs(ns)
	if err != nil { c.JSON(500, model.Response{Code: 500, Message: "K8s API error: " + err.Error()}); return }
	type PVCSummary struct {
		Namespace    string `json:"namespace"`
		Name         string `json:"name"`
		Phase        string `json:"phase"`
		Size         string `json:"size"`
		StorageClass string `json:"storage_class"`
	}
	result := []PVCSummary{}
	for _, p := range pvcs.Items {
		size := ""
		if p.Status.Capacity != nil {
			if s, ok := p.Status.Capacity["storage"]; ok { size = s }
		}
		result = append(result, PVCSummary{
			Namespace:     p.Metadata.Namespace,
			Name:          p.Metadata.Name,
			Phase:         p.Status.Phase,
			Size:          size,
			StorageClass:  p.Spec.StorageClassName,
		})
	}
	c.JSON(200, model.Response{Code: 200, Data: result})
}

// DeletePVCNS deletes a PVC (code-based)
func (h *KubernetesHandler) DeletePVCNS(c *gin.Context) {
	clusterID := h.resolveClusterCode(c.Param("clusterCode"))
	if clusterID == 0 { c.JSON(500, model.Response{Code: 500, Message: "cluster not found"}); return }
	client, _, err := h.getK8sClient(clusterID)
	if err != nil { c.JSON(500, model.Response{Code: 500, Message: err.Error()}); return }
	if err := client.DeletePVC(c.Param("namespace"), c.Param("name")); err != nil {
		c.JSON(500, model.Response{Code: 500, Message: "删除失败: " + err.Error()}); return
	}
	c.JSON(200, model.Response{Code: 200, Message: "已删除"})
}

// ============================================================================
// StatefulSet / DaemonSet handlers (code-based)
// ============================================================================

// ListStatefulSetsNS lists StatefulSets in a namespace