/*

 Copyright 2019 The KubeSphere Authors.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.

*/
package v1alpha2

import (
	"github.com/emicklei/go-restful"
	"github.com/emicklei/go-restful-openapi"
	"k8s.io/apimachinery/pkg/runtime/schema"
	"kubesphere.io/kubesphere/pkg/api/monitoring/v1alpha2"
	"kubesphere.io/kubesphere/pkg/apiserver/runtime"
	"kubesphere.io/kubesphere/pkg/constants"
	"kubesphere.io/kubesphere/pkg/simple/client/k8s"
	"kubesphere.io/kubesphere/pkg/simple/client/monitoring"
	"net/http"
)

const (
	GroupName = "monitoring.kubesphere.io"
	RespOK    = "ok"
)

var GroupVersion = schema.GroupVersion{Group: GroupName, Version: "v1alpha2"}

func AddToContainer(c *restful.Container, k8sClient k8s.Client, monitoringClient monitoring.Interface) error {
	ws := runtime.NewWebService(GroupVersion)

	h := newHandler(k8sClient, monitoringClient)

	ws.Route(ws.GET("/cluster").
		To(h.handleClusterMetricsQuery).
		Doc("Get cluster-level metric data.").
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both cluster CPU usage and disk usage: `cluster_cpu_usage|cluster_disk_size_usage`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.ClusterMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/nodes").
		To(h.handleNodeMetricsQuery).
		Doc("Get node-level metric data of all nodes.").
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both node CPU usage and disk usage: `node_cpu_usage|node_disk_size_usage`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("resources_filter", "The node filter consists of a regexp pattern. It specifies which node data to return. For example, the following filter matches both node i-caojnter and i-cmu82ogj: `i-caojnter|i-cmu82ogj`.").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_metric", "Sort nodes by the specified metric. Not applicable if **start** and **end** are provided.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_type", "Sort order. One of asc, desc.").DefaultValue("desc.").DataType("string").Required(false)).
		Param(ws.QueryParameter("page", "The page number. This field paginates result data of each metric, then returns a specific page. For example, setting **page** to 2 returns the second page. It only applies to sorted metric data.").DataType("integer").Required(false)).
		Param(ws.QueryParameter("limit", "Page size, the maximum number of results in a single page. Defaults to 5.").DataType("integer").Required(false).DefaultValue("5")).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.NodeMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/nodes/{node}").
		To(h.handleNodeMetricsQuery).
		Doc("Get node-level metric data of the specific node.").
		Param(ws.PathParameter("node", "Node name.").DataType("string").Required(true)).
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both node CPU usage and disk usage: `node_cpu_usage|node_disk_size_usage`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.NodeMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/workspaces").
		To(h.handleWorkspaceMetricsQuery).
		Doc("Get workspace-level metric data of all workspaces.").
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both workspace CPU usage and memory usage: `workspace_cpu_usage|workspace_memory_usage`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("resources_filter", "The workspace filter consists of a regexp pattern. It specifies which workspace data to return.").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_metric", "Sort workspaces by the specified metric. Not applicable if **start** and **end** are provided.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_type", "Sort order. One of asc, desc.").DefaultValue("desc.").DataType("string").Required(false)).
		Param(ws.QueryParameter("page", "The page number. This field paginates result data of each metric, then returns a specific page. For example, setting **page** to 2 returns the second page. It only applies to sorted metric data.").DataType("integer").Required(false)).
		Param(ws.QueryParameter("limit", "Page size, the maximum number of results in a single page. Defaults to 5.").DataType("integer").Required(false).DefaultValue("5")).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.WorkspaceMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/workspaces/{workspace}").
		To(h.handleWorkspaceMetricsQuery).
		Doc("Get workspace-level metric data of a specific workspace.").
		Param(ws.PathParameter("workspace", "Workspace name.").DataType("string").Required(true)).
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both workspace CPU usage and memory usage: `workspace_cpu_usage|workspace_memory_usage`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.WorkspaceMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/workspaces/{workspace}/namespaces").
		To(h.handleNamespaceMetricsQuery).
		Doc("Get namespace-level metric data of a specific workspace.").
		Param(ws.PathParameter("workspace", "Workspace name.").DataType("string").Required(true)).
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both namespace CPU usage and memory usage: `namespace_cpu_usage|namespace_memory_usage`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("resources_filter", "The namespace filter consists of a regexp pattern. It specifies which namespace data to return. For example, the following filter matches both namespace test and kube-system: `test|kube-system`.").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_metric", "Sort namespaces by the specified metric. Not applicable if **start** and **end** are provided.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_type", "Sort order. One of asc, desc.").DefaultValue("desc.").DataType("string").Required(false)).
		Param(ws.QueryParameter("page", "The page number. This field paginates result data of each metric, then returns a specific page. For example, setting **page** to 2 returns the second page. It only applies to sorted metric data.").DataType("integer").Required(false)).
		Param(ws.QueryParameter("limit", "Page size, the maximum number of results in a single page. Defaults to 5.").DataType("integer").Required(false).DefaultValue("5")).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.NamespaceMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/namespaces").
		To(h.handleNamespaceMetricsQuery).
		Doc("Get namespace-level metric data of all namespaces.").
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both namespace CPU usage and memory usage: `namespace_cpu_usage|namespace_memory_usage`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("resources_filter", "The namespace filter consists of a regexp pattern. It specifies which namespace data to return. For example, the following filter matches both namespace test and kube-system: `test|kube-system`.").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_metric", "Sort namespaces by the specified metric. Not applicable if **start** and **end** are provided.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_type", "Sort order. One of asc, desc.").DefaultValue("desc.").DataType("string").Required(false)).
		Param(ws.QueryParameter("page", "The page number. This field paginates result data of each metric, then returns a specific page. For example, setting **page** to 2 returns the second page. It only applies to sorted metric data.").DataType("integer").Required(false)).
		Param(ws.QueryParameter("limit", "Page size, the maximum number of results in a single page. Defaults to 5.").DataType("integer").Required(false).DefaultValue("5")).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.NamespaceMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/namespaces/{namespace}").
		To(h.handleNamespaceMetricsQuery).
		Doc("Get namespace-level metric data of the specific namespace.").
		Param(ws.PathParameter("namespace", "The name of the namespace.").DataType("string").Required(true)).
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both namespace CPU usage and memory usage: `namespace_cpu_usage|namespace_memory_usage`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.NamespaceMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/namespaces/{namespace}/workloads").
		To(h.handleWorkloadMetricsQuery).
		Doc("Get workload-level metric data of a specific namespace's workloads.").
		Param(ws.PathParameter("namespace", "The name of the namespace.").DataType("string").Required(true)).
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both workload CPU usage and memory usage: `workload_cpu_usage|workload_memory_usage`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("resources_filter", "The workload filter consists of a regexp pattern. It specifies which workload data to return. For example, the following filter matches any workload whose name begins with prometheus: `prometheus.*`.").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_metric", "Sort workloads by the specified metric. Not applicable if **start** and **end** are provided.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_type", "Sort order. One of asc, desc.").DefaultValue("desc.").DataType("string").Required(false)).
		Param(ws.QueryParameter("page", "The page number. This field paginates result data of each metric, then returns a specific page. For example, setting **page** to 2 returns the second page. It only applies to sorted metric data.").DataType("integer").Required(false)).
		Param(ws.QueryParameter("limit", "Page size, the maximum number of results in a single page. Defaults to 5.").DataType("integer").Required(false).DefaultValue("5")).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.WorkloadMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/namespaces/{namespace}/workloads/{kind}").
		To(h.handleWorkloadMetricsQuery).
		Doc("Get workload-level metric data of all workloads which belongs to a specific kind.").
		Param(ws.PathParameter("namespace", "The name of the namespace.").DataType("string").Required(true)).
		Param(ws.PathParameter("kind", "Workload kind. One of deployment, daemonset, statefulset.").DataType("string").Required(true)).
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both workload CPU usage and memory usage: `workload_cpu_usage|workload_memory_usage`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("resources_filter", "The workload filter consists of a regexp pattern. It specifies which workload data to return. For example, the following filter matches any workload whose name begins with prometheus: `prometheus.*`.").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_metric", "Sort workloads by the specified metric. Not applicable if **start** and **end** are provided.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_type", "Sort order. One of asc, desc.").DefaultValue("desc.").DataType("string").Required(false)).
		Param(ws.QueryParameter("page", "The page number. This field paginates result data of each metric, then returns a specific page. For example, setting **page** to 2 returns the second page. It only applies to sorted metric data.").DataType("integer").Required(false)).
		Param(ws.QueryParameter("limit", "Page size, the maximum number of results in a single page. Defaults to 5.").DataType("integer").Required(false).DefaultValue("5")).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.WorkloadMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/namespaces/{namespace}/pods").
		To(h.handlePodMetricsQuery).
		Doc("Get pod-level metric data of the specific namespace's pods.").
		Param(ws.PathParameter("namespace", "The name of the namespace.").DataType("string").Required(true)).
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both pod CPU usage and memory usage: `pod_cpu_usage|pod_memory_usage`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("resources_filter", "The pod filter consists of a regexp pattern. It specifies which pod data to return. For example, the following filter matches any pod whose name begins with redis: `redis.*`.").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_metric", "Sort pods by the specified metric. Not applicable if **start** and **end** are provided.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_type", "Sort order. One of asc, desc.").DefaultValue("desc.").DataType("string").Required(false)).
		Param(ws.QueryParameter("page", "The page number. This field paginates result data of each metric, then returns a specific page. For example, setting **page** to 2 returns the second page. It only applies to sorted metric data.").DataType("integer").Required(false)).
		Param(ws.QueryParameter("limit", "Page size, the maximum number of results in a single page. Defaults to 5.").DataType("integer").Required(false).DefaultValue("5")).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.PodMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/namespaces/{namespace}/pods/{pod}").
		To(h.handlePodMetricsQuery).
		Doc("Get pod-level metric data of a specific pod. Navigate to the pod by the pod's namespace.").
		Param(ws.PathParameter("namespace", "The name of the namespace.").DataType("string").Required(true)).
		Param(ws.PathParameter("pod", "Pod name.").DataType("string").Required(true)).
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both pod CPU usage and memory usage: `pod_cpu_usage|pod_memory_usage`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.PodMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/namespaces/{namespace}/workloads/{kind}/{workload}/pods").
		To(h.handlePodMetricsQuery).
		Doc("Get pod-level metric data of a specific workload's pods. Navigate to the workload by the namespace.").
		Param(ws.PathParameter("namespace", "The name of the namespace.").DataType("string").Required(true)).
		Param(ws.PathParameter("kind", "Workload kind. One of deployment, daemonset, statefulset.").DataType("string").Required(true)).
		Param(ws.PathParameter("workload", "Workload name.").DataType("string").Required(true)).
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both pod CPU usage and memory usage: `pod_cpu_usage|pod_memory_usage`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("resources_filter", "The pod filter consists of a regexp pattern. It specifies which pod data to return. For example, the following filter matches any pod whose name begins with redis: `redis.*`.").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_metric", "Sort pods by the specified metric. Not applicable if **start** and **end** are provided.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_type", "Sort order. One of asc, desc.").DefaultValue("desc.").DataType("string").Required(false)).
		Param(ws.QueryParameter("page", "The page number. This field paginates result data of each metric, then returns a specific page. For example, setting **page** to 2 returns the second page. It only applies to sorted metric data.").DataType("integer").Required(false)).
		Param(ws.QueryParameter("limit", "Page size, the maximum number of results in a single page. Defaults to 5.").DataType("integer").Required(false).DefaultValue("5")).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.PodMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/nodes/{node}/pods").
		To(h.handlePodMetricsQuery).
		Doc("Get pod-level metric data of all pods on a specific node.").
		Param(ws.PathParameter("node", "Node name.").DataType("string").Required(true)).
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both pod CPU usage and memory usage: `pod_cpu_usage|pod_memory_usage`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("resources_filter", "The pod filter consists of a regexp pattern. It specifies which pod data to return. For example, the following filter matches any pod whose name begins with redis: `redis.*`.").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_metric", "Sort pods by the specified metric. Not applicable if **start** and **end** are provided.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_type", "Sort order. One of asc, desc.").DefaultValue("desc.").DataType("string").Required(false)).
		Param(ws.QueryParameter("page", "The page number. This field paginates result data of each metric, then returns a specific page. For example, setting **page** to 2 returns the second page. It only applies to sorted metric data.").DataType("integer").Required(false)).
		Param(ws.QueryParameter("limit", "Page size, the maximum number of results in a single page. Defaults to 5.").DataType("integer").Required(false).DefaultValue("5")).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.PodMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/nodes/{node}/pods/{pod}").
		To(h.handlePodMetricsQuery).
		Doc("Get pod-level metric data of a specific pod. Navigate to the pod by the node where it is scheduled.").
		Param(ws.PathParameter("node", "Node name.").DataType("string").Required(true)).
		Param(ws.PathParameter("pod", "Pod name.").DataType("string").Required(true)).
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both pod CPU usage and memory usage: `pod_cpu_usage|pod_memory_usage`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.PodMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/namespaces/{namespace}/pods/{pod}/containers").
		To(h.handleContainerMetricsQuery).
		Doc("Get container-level metric data of a specific pod's containers. Navigate to the pod by the pod's namespace.").
		Param(ws.PathParameter("namespace", "The name of the namespace.").DataType("string").Required(true)).
		Param(ws.PathParameter("pod", "Pod name.").DataType("string").Required(true)).
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both container CPU usage and memory usage: `container_cpu_usage|container_memory_usage`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("resources_filter", "The container filter consists of a regexp pattern. It specifies which container data to return. For example, the following filter matches container prometheus and prometheus-config-reloader: `prometheus|prometheus-config-reloader`.").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_metric", "Sort containers by the specified metric. Not applicable if **start** and **end** are provided.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_type", "Sort order. One of asc, desc.").DefaultValue("desc.").DataType("string").Required(false)).
		Param(ws.QueryParameter("page", "The page number. This field paginates result data of each metric, then returns a specific page. For example, setting **page** to 2 returns the second page. It only applies to sorted metric data.").DataType("integer").Required(false)).
		Param(ws.QueryParameter("limit", "Page size, the maximum number of results in a single page. Defaults to 5.").DataType("integer").Required(false).DefaultValue("5")).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.ContainerMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/namespaces/{namespace}/pods/{pod}/containers/{container}").
		To(h.handleContainerMetricsQuery).
		Doc("Get container-level metric data of a specific container. Navigate to the container by the pod name and the namespace.").
		Param(ws.PathParameter("namespace", "The name of the namespace.").DataType("string").Required(true)).
		Param(ws.PathParameter("pod", "Pod name.").DataType("string").Required(true)).
		Param(ws.PathParameter("container", "Container name.").DataType("string").Required(true)).
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both container CPU usage and memory usage: `container_cpu_usage|container_memory_usage`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.ContainerMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/storageclasses/{storageclass}/persistentvolumeclaims").
		To(h.handlePVCMetricsQuery).
		Doc("Get PVC-level metric data of the specific storageclass's PVCs.").
		Param(ws.PathParameter("storageclass", "The name of the storageclass.").DataType("string").Required(true)).
		Param(ws.PathParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both PVC available and used inodes: `pvc_inodes_available|pvc_inodes_used`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("resources_filter", "The PVC filter consists of a regexp pattern. It specifies which PVC data to return. For example, the following filter matches any pod whose name begins with redis: `redis.*`.").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_metric", "Sort PVCs by the specified metric. Not applicable if **start** and **end** are provided.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_type", "Sort order. One of asc, desc.").DefaultValue("desc.").DataType("string").Required(false)).
		Param(ws.QueryParameter("page", "The page number. This field paginates result data of each metric, then returns a specific page. For example, setting **page** to 2 returns the second page. It only applies to sorted metric data.").DataType("integer").Required(false)).
		Param(ws.QueryParameter("limit", "Page size, the maximum number of results in a single page. Defaults to 5.").DataType("integer").Required(false).DefaultValue("5")).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.PVCMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/namespaces/{namespace}/persistentvolumeclaims").
		To(h.handlePVCMetricsQuery).
		Doc("Get PVC-level metric data of the specific namespace's PVCs.").
		Param(ws.PathParameter("namespace", "The name of the namespace.").DataType("string").Required(true)).
		Param(ws.PathParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both PVC available and used inodes: `pvc_inodes_available|pvc_inodes_used`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("resources_filter", "The PVC filter consists of a regexp pattern. It specifies which PVC data to return. For example, the following filter matches any pod whose name begins with redis: `redis.*`.").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_metric", "Sort PVCs by the specified metric. Not applicable if **start** and **end** are provided.").DataType("string").Required(false)).
		Param(ws.QueryParameter("sort_type", "Sort order. One of asc, desc.").DefaultValue("desc.").DataType("string").Required(false)).
		Param(ws.QueryParameter("page", "The page number. This field paginates result data of each metric, then returns a specific page. For example, setting **page** to 2 returns the second page. It only applies to sorted metric data.").DataType("integer").Required(false)).
		Param(ws.QueryParameter("limit", "Page size, the maximum number of results in a single page. Defaults to 5.").DataType("integer").Required(false).DefaultValue("5")).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.PVCMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/namespaces/{namespace}/persistentvolumeclaims/{pvc}").
		To(h.handlePVCMetricsQuery).
		Doc("Get PVC-level metric data of a specific PVC. Navigate to the PVC by the PVC's namespace.").
		Param(ws.PathParameter("namespace", "The name of the namespace.").DataType("string").Required(true)).
		Param(ws.PathParameter("pvc", "PVC name.").DataType("string").Required(true)).
		Param(ws.PathParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both PVC available and used inodes: `pvc_inodes_available|pvc_inodes_used`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.PVCMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	ws.Route(ws.GET("/components/{component}").
		To(h.handleComponentMetricsQuery).
		Doc("Get component-level metric data of the specific system component.").
		Param(ws.PathParameter("component", "system component to monitor. One of etcd, apiserver, scheduler, controller_manager, coredns, prometheus.").DataType("string").Required(true)).
		Param(ws.QueryParameter("metrics_filter", "The metric name filter consists of a regexp pattern. It specifies which metric data to return. For example, the following filter matches both etcd server list and total size of the underlying database: `etcd_server_list|etcd_mvcc_db_size`. View available metrics at [kubesphere.io](https://docs.kubesphere.io/advanced-v2.0/zh-CN/api-reference/monitoring-metrics/).").DataType("string").Required(false)).
		Param(ws.QueryParameter("start", "Start time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1559347200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("end", "End time of query. Use **start** and **end** to retrieve metric data over a time span. It is a string with Unix time format, eg. 1561939200. ").DataType("string").Required(false)).
		Param(ws.QueryParameter("step", "Time interval. Retrieve metric data at a fixed interval within the time range of start and end. It requires both **start** and **end** are provided. The format is [0-9]+[smhdwy]. Defaults to 10m (i.e. 10 min).").DataType("string").DefaultValue("10m").Required(false)).
		Param(ws.QueryParameter("time", "A timestamp in Unix time format. Retrieve metric data at a single point in time. Defaults to now. Time and the combination of start, end, step are mutually exclusive.").DataType("string").Required(false)).
		Metadata(restfulspec.KeyOpenAPITags, []string{constants.ComponentMetricsTag}).
		Writes(v1alpha2.APIResponse{}).
		Returns(http.StatusOK, RespOK, v1alpha2.APIResponse{})).
		Produces(restful.MIME_JSON)

	c.Add(ws)
	return nil
}
