package handlers

import (
	"net/http"
	"strconv"

	"ezops/internal/models"

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

// K8sHandler K8s处理器
type K8sHandler struct {
	db *gorm.DB
}

// NewK8sHandler 创建K8s处理器
func NewK8sHandler(db *gorm.DB) *K8sHandler {
	return &K8sHandler{db: db}
}

// ListClusters 获取集群列表
// @Summary 获取集群列表
// @Description 获取所有K8s集群列表
// @Tags K8s集群
// @Produce json
// @Security Bearer
// @Param page query int false "页码"
// @Param page_size query int false "每页数量"
// @Success 200 {object} models.Response{data=models.ListResponse}
// @Router /k8s-clusters [get]
func (h *K8sHandler) ListClusters(c *gin.Context) {
	var query models.PageQuery
	c.ShouldBindQuery(&query)

	var total int64
	h.db.Model(&models.K8sCluster{}).Count(&total)

	var clusters []models.K8sCluster
	h.db.Offset(query.GetOffset()).Limit(query.GetLimit()).Find(&clusters)

	c.JSON(http.StatusOK, models.Response{
		Code:    200,
		Message: "success",
		Data: models.ListResponse{
			List:  clusters,
			Total: total,
		},
	})
}

// GetCluster 获取集群详情
// @Summary 获取集群详情
// @Description 获取指定K8s集群的详细信息
// @Tags K8s集群
// @Produce json
// @Security Bearer
// @Param id path int true "集群ID"
// @Success 200 {object} models.Response{data=models.K8sCluster}
// @Router /k8s-clusters/{id} [get]
func (h *K8sHandler) GetCluster(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

	var cluster models.K8sCluster
	if err := h.db.First(&cluster, id).Error; err != nil {
		c.JSON(http.StatusNotFound, models.Response{
			Code:    404,
			Message: "集群不存在",
		})
		return
	}

	c.JSON(http.StatusOK, models.Response{
		Code:    200,
		Message: "success",
		Data:    cluster,
	})
}

// CreateCluster 创建集群
// @Summary 创建集群
// @Description 创建新K8s集群
// @Tags K8s集群
// @Accept json
// @Produce json
// @Security Bearer
// @Param request body models.CreateK8sClusterRequest true "创建请求"
// @Success 200 {object} models.Response{data=models.K8sCluster}
// @Router /k8s-clusters [post]
func (h *K8sHandler) CreateCluster(c *gin.Context) {
	var req models.CreateK8sClusterRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, models.Response{
			Code:    400,
			Message: "请求参数错误: " + err.Error(),
		})
		return
	}

	cluster := models.K8sCluster{
		Name:        req.Name,
		Code:        req.Code,
		Version:     req.Version,
		APIEndpoint: req.APIEndpoint,
		KubeConfig:  req.KubeConfig,
		Description: req.Description,
		Status:      "healthy",
	}

	if err := h.db.Create(&cluster).Error; err != nil {
		c.JSON(http.StatusInternalServerError, models.Response{
			Code:    500,
			Message: "创建失败",
		})
		return
	}

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

// UpdateCluster 更新集群
// @Summary 更新集群
// @Description 更新指定K8s集群信息
// @Tags K8s集群
// @Accept json
// @Produce json
// @Security Bearer
// @Param id path int true "集群ID"
// @Param request body models.CreateK8sClusterRequest true "更新请求"
// @Success 200 {object} models.Response{data=models.K8sCluster}
// @Router /k8s-clusters/{id} [put]
func (h *K8sHandler) UpdateCluster(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

	var req models.CreateK8sClusterRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		c.JSON(http.StatusBadRequest, models.Response{
			Code:    400,
			Message: "请求参数错误: " + err.Error(),
		})
		return
	}

	var cluster models.K8sCluster
	if err := h.db.First(&cluster, id).Error; err != nil {
		c.JSON(http.StatusNotFound, models.Response{
			Code:    404,
			Message: "集群不存在",
		})
		return
	}

	updates := map[string]interface{}{
		"name":         req.Name,
		"version":      req.Version,
		"api_endpoint": req.APIEndpoint,
		"kube_config":  req.KubeConfig,
		"description":  req.Description,
	}

	if err := h.db.Model(&cluster).Updates(updates).Error; err != nil {
		c.JSON(http.StatusInternalServerError, models.Response{
			Code:    500,
			Message: "更新失败",
		})
		return
	}

	h.db.First(&cluster, id)

	c.JSON(http.StatusOK, models.Response{
		Code:    200,
		Message: "更新成功",
		Data:    cluster,
	})
}

// DeleteCluster 删除集群
// @Summary 删除集群
// @Description 删除指定K8s集群
// @Tags K8s集群
// @Produce json
// @Security Bearer
// @Param id path int true "集群ID"
// @Success 200 {object} models.Response
// @Router /k8s-clusters/{id} [delete]
func (h *K8sHandler) DeleteCluster(c *gin.Context) {
	id, _ := strconv.Atoi(c.Param("id"))

	if err := h.db.Delete(&models.K8sCluster{}, id).Error; err != nil {
		c.JSON(http.StatusInternalServerError, models.Response{
			Code:    500,
			Message: "删除失败",
		})
		return
	}

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

// ListNodes 获取节点列表
// @Summary 获取节点列表
// @Description 获取指定集群的节点列表
// @Tags K8s集群
// @Produce json
// @Security Bearer
// @Param id path int true "集群ID"
// @Success 200 {object} models.Response{data=[]models.K8sNode}
// @Router /k8s-clusters/{id}/nodes [get]
func (h *K8sHandler) ListNodes(c *gin.Context) {
	clusterID, _ := strconv.Atoi(c.Param("id"))

	var nodes []models.K8sNode
	h.db.Where("cluster_id = ?", clusterID).Find(&nodes)

	c.JSON(http.StatusOK, models.Response{
		Code:    200,
		Message: "success",
		Data:    nodes,
	})
}

// ListPods 获取Pod列表
// @Summary 获取Pod列表
// @Description 获取指定集群的Pod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} models.Response{data=[]models.K8sPod}
// @Router /k8s-clusters/{id}/pods [get]
func (h *K8sHandler) ListPods(c *gin.Context) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	namespace := c.Query("namespace")

	db := h.db.Where("cluster_id = ?", clusterID)
	if namespace != "" {
		db = db.Where("namespace = ?", namespace)
	}

	var pods []models.K8sPod
	db.Find(&pods)

	c.JSON(http.StatusOK, models.Response{
		Code:    200,
		Message: "success",
		Data:    pods,
	})
}

// ListDeployments 获取Deployment列表
// @Summary 获取Deployment列表
// @Description 获取指定集群的Deployment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} models.Response{data=[]models.K8sDeployment}
// @Router /k8s-clusters/{id}/deployments [get]
func (h *K8sHandler) ListDeployments(c *gin.Context) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	namespace := c.Query("namespace")

	db := h.db.Where("cluster_id = ?", clusterID)
	if namespace != "" {
		db = db.Where("namespace = ?", namespace)
	}

	var deployments []models.K8sDeployment
	db.Find(&deployments)

	c.JSON(http.StatusOK, models.Response{
		Code:    200,
		Message: "success",
		Data:    deployments,
	})
}

// ListServices 获取Service列表
// @Summary 获取Service列表
// @Description 获取指定集群的Service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} models.Response{data=[]models.K8sService}
// @Router /k8s-clusters/{id}/services [get]
func (h *K8sHandler) ListServices(c *gin.Context) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	namespace := c.Query("namespace")

	db := h.db.Where("cluster_id = ?", clusterID)
	if namespace != "" {
		db = db.Where("namespace = ?", namespace)
	}

	var services []models.K8sService
	db.Find(&services)

	c.JSON(http.StatusOK, models.Response{
		Code:    200,
		Message: "success",
		Data:    services,
	})
}

// 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} models.Response{data=[]models.K8sIngress}
// @Router /k8s-clusters/{id}/ingresses [get]
func (h *K8sHandler) ListIngresses(c *gin.Context) {
	clusterID, _ := strconv.Atoi(c.Param("id"))
	namespace := c.Query("namespace")

	db := h.db.Where("cluster_id = ?", clusterID)
	if namespace != "" {
		db = db.Where("namespace = ?", namespace)
	}

	var ingresses []models.K8sIngress
	db.Find(&ingresses)

	c.JSON(http.StatusOK, models.Response{
		Code:    200,
		Message: "success",
		Data:    ingresses,
	})
}