package handlers

import (
	"net/http"
	"strconv"

	"ezops/internal/models"
	k8sclient "ezops/pkg/kubernetesclient"

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

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

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

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

	c.JSON(http.StatusOK, models.Response{Code: 200, Data: hpas.Items})
}

// CreateHPA 创建 HPA
func (h *KubernetesHandler) CreateHPA(c *gin.Context) {
	clusterID, _ := strconv.Atoi(c.Param("id"))

	var req k8sclient.CreateHPARequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, models.Response{Code: 400, Message: "参数错误: " + err.Error()})
		return
	}
	if req.Name == "" || req.Namespace == "" || req.TargetName == "" {
		c.JSON(http.StatusBadRequest, models.Response{Code: 400, Message: "name/namespace/targetName 必填"})
		return
	}

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

	hpa, err := client.CreateHPA(req)
	if err != nil {
		c.JSON(http.StatusInternalServerError, models.Response{Code: 500, Message: "创建 HPA 失败: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "HPA 创建成功", Data: hpa})
}

// DeleteHPA 删除 HPA
func (h *KubernetesHandler) DeleteHPA(c *gin.Context) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	namespace := c.Param("namespace")
	name := c.Param("name")

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

	if err := client.DeleteHPA(namespace, name); err != nil {
		c.JSON(http.StatusInternalServerError, models.Response{Code: 500, Message: "删除 HPA 失败: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "HPA 已删除"})
}

// ============================================================================
// CronJob 管理
// ============================================================================

// ListCronJobs 获取 CronJob 列表
func (h *KubernetesHandler) ListCronJobs(c *gin.Context) {
	clusterID, _ := strconv.Atoi(c.Param("id"))

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

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

	c.JSON(http.StatusOK, models.Response{Code: 200, Data: cronjobs.Items})
}

// CreateCronJob 创建 CronJob
func (h *KubernetesHandler) CreateCronJob(c *gin.Context) {
	clusterID, _ := strconv.Atoi(c.Param("id"))

	var req k8sclient.CreateCronJobRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, models.Response{Code: 400, Message: "参数错误: " + err.Error()})
		return
	}

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

	cj, err := client.CreateCronJob(req)
	if err != nil {
		c.JSON(http.StatusInternalServerError, models.Response{Code: 500, Message: "创建 CronJob 失败: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "CronJob 创建成功", Data: cj})
}

// SuspendCronJob 暂停/恢复 CronJob
func (h *KubernetesHandler) SuspendCronJob(c *gin.Context) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	namespace := c.Param("namespace")
	name := c.Param("name")

	var req struct {
		Suspend bool `json:"suspend"`
	}
	c.ShouldBindJSON(&req)

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

	if err := client.SuspendCronJob(namespace, name, req.Suspend); err != nil {
		c.JSON(http.StatusInternalServerError, models.Response{Code: 500, Message: "操作失败: " + err.Error()})
		return
	}

	action := "恢复"
	if req.Suspend {
		action = "暂停"
	}
	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "CronJob 已" + action})
}

// DeleteCronJob 删除 CronJob
func (h *KubernetesHandler) DeleteCronJob(c *gin.Context) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	namespace := c.Param("namespace")
	name := c.Param("name")

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

	if err := client.DeleteCronJob(namespace, name); err != nil {
		c.JSON(http.StatusInternalServerError, models.Response{Code: 500, Message: "删除 CronJob 失败: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "CronJob 已删除"})
}

// TriggerCronJob 手动触发 CronJob
func (h *KubernetesHandler) TriggerCronJob(c *gin.Context) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	namespace := c.Param("namespace")
	name := c.Param("name")

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

	if err := client.TriggerCronJob(namespace, name); err != nil {
		c.JSON(http.StatusInternalServerError, models.Response{Code: 500, Message: "触发失败: " + err.Error()})
		return
	}

	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "手动触发成功"})
}

// ============================================================================
// Deployment CI 集成 (Webhook 更新镜像)
// ============================================================================

// UpdateDeploymentImage 更新 Deployment 容器镜像 (CI webhook)
func (h *KubernetesHandler) ListHPAsNS(c *gin.Context) {
	h.listHPAsWithNS(c, c.Param("namespace"))
}
func (h *KubernetesHandler) CreateHPANS(c *gin.Context) {
	h.createHPAWithNS(c, c.Param("namespace"))
}
func (h *KubernetesHandler) DeleteHPANS(c *gin.Context) {
	h.deleteHPAWithNS(c, c.Param("namespace"))
}
func (h *KubernetesHandler) ListCronJobsNS(c *gin.Context) {
	h.listCronJobsWithNS(c, c.Param("namespace"))
}
func (h *KubernetesHandler) CreateCronJobNS(c *gin.Context) {
	h.createCronJobWithNS(c, c.Param("namespace"))
}
func (h *KubernetesHandler) SuspendCronJobNS(c *gin.Context) {
	h.suspendCronJobWithNS(c, c.Param("namespace"))
}
func (h *KubernetesHandler) TriggerCronJobNS(c *gin.Context) {
	h.triggerCronJobWithNS(c, c.Param("namespace"))
}
func (h *KubernetesHandler) DeleteCronJobNS(c *gin.Context) {
	h.deleteCronJobWithNS(c, c.Param("namespace"))
}
func (h *KubernetesHandler) listHPAsWithNS(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, models.Response{Code: 500, Message: err.Error()}); return }
	hpas, err := client.ListHPAs()
	if err != nil { c.JSON(500, models.Response{Code: 500, Message: "K8s API error: " + err.Error()}); return }
	type HPASummary struct {
		Namespace    string `json:"namespace"`
		Name         string `json:"name"`
		TargetKind   string `json:"target_kind"`
		TargetName   string `json:"target_name"`
		MinReplicas  int    `json:"min_replicas"`
		MaxReplicas  int    `json:"max_replicas"`
		CPUPercent   int    `json:"cpu_percent"`
		MemPercent   int    `json:"mem_percent"`
		CurrentReplicas int    `json:"current_replicas"`
	}
	result := []HPASummary{}
	for _, h := range hpas.Items {
		if h.Metadata.Namespace != ns { continue }
		cpu := 0; mem := 0
		for _, m := range h.Spec.Metrics {
			if m.Resource != nil {
				if m.Resource.Name == "cpu" { cpu = m.Resource.Target.AverageUtilization }
				if m.Resource.Name == "memory" { mem = m.Resource.Target.AverageUtilization }
			}
		}
		result = append(result, HPASummary{
			Namespace:       h.Metadata.Namespace,
			Name:            h.Metadata.Name,
			TargetKind:      h.Spec.ScaleTargetRef.Kind,
			TargetName:      h.Spec.ScaleTargetRef.Name,
			MinReplicas:     h.Spec.MinReplicas,
			MaxReplicas:     h.Spec.MaxReplicas,
			CPUPercent:      cpu,
			MemPercent:      mem,
			CurrentReplicas: h.Status.CurrentReplicas,
		})
	}
	c.JSON(200, models.Response{Code: 200, Data: result})
}
func (h *KubernetesHandler) createHPAWithNS(c *gin.Context, ns string) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	if clusterID == 0 { clusterID = h.resolveClusterCode(c.Param("clusterCode")) }
	var req k8sclient.CreateHPARequest
	if err := c.ShouldBindJSON(&req); err != nil { c.JSON(400, models.Response{Code: 400, Message: "参数错误"}); return }
	if req.Namespace == "" { req.Namespace = ns }
	client, _, err := h.getK8sClient(clusterID)
	if err != nil { c.JSON(500, models.Response{Code: 500, Message: err.Error()}); return }
	hpa, err := client.CreateHPA(req)
	if err != nil { c.JSON(500, models.Response{Code: 500, Message: "创建失败: " + err.Error()}); return }
	c.JSON(200, models.Response{Code: 200, Data: hpa})
}
func (h *KubernetesHandler) deleteHPAWithNS(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, models.Response{Code: 500, Message: err.Error()}); return }
	if err := client.DeleteHPA(ns, c.Param("name")); err != nil { c.JSON(500, models.Response{Code: 500, Message: "删除失败: " + err.Error()}); return }
	c.JSON(200, models.Response{Code: 200, Message: "已删除"})
}
func (h *KubernetesHandler) listCronJobsWithNS(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, models.Response{Code: 500, Message: err.Error()}); return }
	cjs, err := client.ListCronJobs()
	if err != nil { c.JSON(500, models.Response{Code: 500, Message: "K8s API error: " + err.Error()}); return }
	filtered := []k8sclient.CronJobItem{}
	for _, cj := range cjs.Items { if cj.Metadata.Namespace == ns { filtered = append(filtered, cj) } }
	c.JSON(200, models.Response{Code: 200, Data: filtered})
}
func (h *KubernetesHandler) createCronJobWithNS(c *gin.Context, ns string) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	if clusterID == 0 { clusterID = h.resolveClusterCode(c.Param("clusterCode")) }
	var req k8sclient.CreateCronJobRequest
	if err := c.ShouldBindJSON(&req); err != nil { c.JSON(400, models.Response{Code: 400, Message: "参数错误"}); return }
	if req.Namespace == "" { req.Namespace = ns }
	client, _, err := h.getK8sClient(clusterID)
	if err != nil { c.JSON(500, models.Response{Code: 500, Message: err.Error()}); return }
	cj, err := client.CreateCronJob(req)
	if err != nil { c.JSON(500, models.Response{Code: 500, Message: "创建失败: " + err.Error()}); return }
	c.JSON(200, models.Response{Code: 200, Data: cj})
}
func (h *KubernetesHandler) suspendCronJobWithNS(c *gin.Context, ns string) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	if clusterID == 0 { clusterID = h.resolveClusterCode(c.Param("clusterCode")) }
	var req struct { Suspend bool `json:"suspend"` }; c.ShouldBindJSON(&req)
	client, _, err := h.getK8sClient(clusterID)
	if err != nil { c.JSON(500, models.Response{Code: 500, Message: err.Error()}); return }
	if err := client.SuspendCronJob(ns, c.Param("name"), req.Suspend); err != nil { c.JSON(500, models.Response{Code: 500, Message: "操作失败: " + err.Error()}); return }
	action := "恢复"; if req.Suspend { action = "暂停" }
	c.JSON(200, models.Response{Code: 200, Message: "CronJob 已" + action})
}
func (h *KubernetesHandler) triggerCronJobWithNS(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, models.Response{Code: 500, Message: err.Error()}); return }
	if err := client.TriggerCronJob(ns, c.Param("name")); err != nil { c.JSON(500, models.Response{Code: 500, Message: "触发失败: " + err.Error()}); return }
	c.JSON(200, models.Response{Code: 200, Message: "手动触发成功"})
}
func (h *KubernetesHandler) deleteCronJobWithNS(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, models.Response{Code: 500, Message: err.Error()}); return }
	if err := client.DeleteCronJob(ns, c.Param("name")); err != nil { c.JSON(500, models.Response{Code: 500, Message: "删除失败: " + err.Error()}); return }
	c.JSON(200, models.Response{Code: 200, Message: "已删除"})
}
func (h *KubernetesHandler) ListHPAsAllNS(c *gin.Context) {
	clusterID := h.resolveClusterCode(c.Param("clusterCode"))
	if clusterID == 0 { c.JSON(500, models.Response{Code: 500, Message: "cluster not found"}); return }
	client, _, err := h.getK8sClient(clusterID)
	if err != nil { c.JSON(500, models.Response{Code: 500, Message: err.Error()}); return }
	hpas, err := client.ListHPAs()
	if err != nil { c.JSON(500, models.Response{Code: 500, Message: "K8s API error: " + err.Error()}); return }
	type HPASummary struct {
		Namespace       string `json:"namespace"`
		Name            string `json:"name"`
		TargetKind      string `json:"target_kind"`
		TargetName      string `json:"target_name"`
		MinReplicas     int    `json:"min_replicas"`
		MaxReplicas     int    `json:"max_replicas"`
		CPUPercent      int    `json:"cpu_percent"`
		MemPercent      int    `json:"mem_percent"`
		CurrentReplicas int    `json:"current_replicas"`
	}
	result := []HPASummary{}
	for _, h := range hpas.Items {
		cpu := 0; mem := 0
		for _, m := range h.Spec.Metrics {
			if m.Resource != nil {
				if m.Resource.Name == "cpu" { cpu = m.Resource.Target.AverageUtilization }
				if m.Resource.Name == "memory" { mem = m.Resource.Target.AverageUtilization }
			}
		}
		result = append(result, HPASummary{
			Namespace:       h.Metadata.Namespace,
			Name:            h.Metadata.Name,
			TargetKind:      h.Spec.ScaleTargetRef.Kind,
			TargetName:      h.Spec.ScaleTargetRef.Name,
			MinReplicas:     h.Spec.MinReplicas,
			MaxReplicas:     h.Spec.MaxReplicas,
			CPUPercent:      cpu,
			MemPercent:      mem,
			CurrentReplicas: h.Status.CurrentReplicas,
		})
	}
	c.JSON(200, models.Response{Code: 200, Data: result})
}

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

// buildPodMetricsMap fetches pod metrics and returns a map keyed by "namespace/podname" → aggregated CPU/Memory strings.
// Best-effort: returns empty map if metrics-server is unavailable. // Logan.Li M2