package services

import (
	"github.com/rancher/rke/hosts"
	"github.com/rancher/types/apis/management.cattle.io/v3"
	"github.com/sirupsen/logrus"
	"golang.org/x/sync/errgroup"
)

func RunWorkerPlane(controlHosts, workerHosts []*hosts.Host, workerServices v3.RKEConfigServices, nginxProxyImage, sidekickImage string, healthcheckDialerFactory hosts.DialerFactory) error {
	logrus.Infof("[%s] Building up Worker Plane..", WorkerRole)
	var errgrp errgroup.Group

	// Deploy worker components on control hosts
	for _, host := range controlHosts {
		controlHost := host
		errgrp.Go(func() error {
			return doDeployWorkerPlane(controlHost, workerServices, nginxProxyImage, sidekickImage, healthcheckDialerFactory, controlHosts)
		})
	}
	if err := errgrp.Wait(); err != nil {
		return err
	}
	// Deploy worker components on worker hosts
	for _, host := range workerHosts {
		workerHost := host
		errgrp.Go(func() error {
			return doDeployWorkerPlane(workerHost, workerServices, nginxProxyImage, sidekickImage, healthcheckDialerFactory, controlHosts)
		})
	}
	if err := errgrp.Wait(); err != nil {
		return err
	}
	logrus.Infof("[%s] Successfully started Worker Plane..", WorkerRole)
	return nil
}

func RemoveWorkerPlane(workerHosts []*hosts.Host, force bool) error {
	logrus.Infof("[%s] Tearing down Worker Plane..", WorkerRole)
	for _, host := range workerHosts {
		// check if the host already is a controlplane
		if host.IsControl && !force {
			logrus.Infof("[%s] Host [%s] is already a controlplane host, nothing to do.", WorkerRole, host.Address)
			return nil
		}

		if err := removeKubelet(host); err != nil {
			return err
		}
		if err := removeKubeproxy(host); err != nil {
			return err
		}
		if err := removeNginxProxy(host); err != nil {
			return err
		}
		if err := removeSidekick(host); err != nil {
			return err
		}
		logrus.Infof("[%s] Successfully teared down Worker Plane..", WorkerRole)
	}

	return nil
}

func doDeployWorkerPlane(host *hosts.Host,
	workerServices v3.RKEConfigServices,
	nginxProxyImage, sidekickImage string,
	healthcheckDialerFactory hosts.DialerFactory,
	controlHosts []*hosts.Host) error {
	// run nginx proxy
	if !host.IsControl {
		if err := runNginxProxy(host, controlHosts, nginxProxyImage); err != nil {
			return err
		}
	}
	// run sidekick
	if err := runSidekick(host, sidekickImage); err != nil {
		return err
	}
	// run kubelet
	if err := runKubelet(host, workerServices.Kubelet, healthcheckDialerFactory); err != nil {
		return err
	}
	return runKubeproxy(host, workerServices.Kubeproxy, healthcheckDialerFactory)
}