package collectors

import (
	"context"

	"github.com/go-logr/logr"
	"github.com/prometheus/client_golang/prometheus"
	"github.com/tidbcloud/infra-provider/regional-server/api/v1alpha1"
	"github.com/tidbcloud/infra-provider/regional-server/pkg/consts"
	"sigs.k8s.io/controller-runtime/pkg/client"
)

var (
	privateLinkEndpointInfo = prometheus.NewDesc(
		"dataplane_manager_privatelinkendpoint_info",
		"Information about privateLinkEndpoint CR.",
		[]string{
			"name",
			"tenant_id",
			"region",
			"provider",
			"vpc",
			"status",
		}, nil)
)

type privateLinkEndpoint struct {
	cli client.Client
	log logr.Logger
}

var _ prometheus.Collector = &privateLinkEndpoint{}

func (a *privateLinkEndpoint) Describe(ch chan<- *prometheus.Desc) {
	ch <- privateLinkEndpointInfo
}

func (a *privateLinkEndpoint) Collect(ch chan<- prometheus.Metric) {
	privateLinkEndpointList := &v1alpha1.PrivateLinkEndpointList{}
	err := a.cli.List(context.Background(), privateLinkEndpointList)
	if err != nil {
		a.log.Error(err, "fetching privateLinkEndpoints")
		return
	}

	for _, privateLinkEndpointCR := range privateLinkEndpointList.Items {
		vpc := privateLinkEndpointCR.Spec.VPCRef.Name
		tenant := privateLinkEndpointCR.GetLabels()[consts.TenantLabelKey]

		ch <- prometheus.MustNewConstMetric(
			privateLinkEndpointInfo,
			prometheus.GaugeValue,
			1.0,
			privateLinkEndpointCR.Name,
			tenant,
			privateLinkEndpointCR.Spec.Region,
			privateLinkEndpointCR.Spec.Provider,
			vpc,
			string(privateLinkEndpointCR.Status.Phase),
		)
	}
}