// Copyright 2019 Yunion
//
// 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 hostman

import (
	"os"

	"yunion.io/x/log"

	"yunion.io/x/onecloud/pkg/appsrv"
	app_common "yunion.io/x/onecloud/pkg/cloudcommon/app"
	"yunion.io/x/onecloud/pkg/cloudcommon/cronman"
	common_options "yunion.io/x/onecloud/pkg/cloudcommon/options"
	"yunion.io/x/onecloud/pkg/cloudcommon/service"
	"yunion.io/x/onecloud/pkg/hostman/downloader"
	"yunion.io/x/onecloud/pkg/hostman/guestman"
	"yunion.io/x/onecloud/pkg/hostman/guestman/guesthandlers"
	"yunion.io/x/onecloud/pkg/hostman/hostdeployer/deployclient"
	"yunion.io/x/onecloud/pkg/hostman/hostinfo"
	"yunion.io/x/onecloud/pkg/hostman/hostmetrics"
	"yunion.io/x/onecloud/pkg/hostman/hostutils"
	"yunion.io/x/onecloud/pkg/hostman/kubehandlers"
	"yunion.io/x/onecloud/pkg/hostman/metadata"
	"yunion.io/x/onecloud/pkg/hostman/options"
	"yunion.io/x/onecloud/pkg/hostman/storageman"
	"yunion.io/x/onecloud/pkg/hostman/storageman/diskhandlers"
	"yunion.io/x/onecloud/pkg/hostman/storageman/storagehandler"
	"yunion.io/x/onecloud/pkg/util/sysutils"
)

type SHostService struct {
	*service.SServiceBase
}

func (host *SHostService) InitService() {
	common_options.ParseOptions(&options.HostOptions, os.Args, "host.conf", "host")
	isRoot := sysutils.IsRootPermission()
	if !isRoot {
		log.Fatalf("host service must running with root permissions")
	}

	if len(options.HostOptions.DeployServerSocketPath) == 0 {
		log.Fatalf("missing deploy server socket path")
	}

	options.HostOptions.EnableRbac = false // disable rbac
	// init base option for pid file
	host.SServiceBase.O = &options.HostOptions.BaseOptions
}

func (host *SHostService) OnExitService() {
	// TODO
}

func (host *SHostService) RunService() {
	app := app_common.InitApp(&options.HostOptions.BaseOptions, false)
	cronManager := cronman.InitCronJobManager(false, options.HostOptions.CronJobWorkerCount)
	hostutils.Init()

	hostInstance := hostinfo.Instance()
	if err := hostInstance.Init(); err != nil {
		log.Fatalf(err.Error())
	}

	deployclient.Init(options.HostOptions.DeployServerSocketPath)
	if err := storageman.Init(hostInstance); err != nil {
		log.Fatalf(err.Error())
	}

	guestman.Init(hostInstance, options.HostOptions.ServersPath)
	app_common.InitAuth(&options.HostOptions.CommonOptions, func() {
		log.Infof("Auth complete!!")
		// ??? Why wait 5 seconds

		hostInstance.StartRegister(2, func() {
			guestman.GetGuestManager().Bootstrap()
			// hostmetrics after guestmanager bootstrap
			hostmetrics.Init()
			hostmetrics.Start()
		})
	})

	go func() {
		<-hostinfo.Instance().IsRegistered // wait host and guest init
		host.initHandlers(app)
	}()

	// Init Metadata handler
	go metadata.StartService(
		app_common.InitApp(&options.HostOptions.BaseOptions, false),
		options.HostOptions.Address, options.HostOptions.Port+1000)

	cronManager.AddJobEveryFewDays(
		"CleanRecycleDiskFiles", 1, 3, 0, 0, storageman.CleanRecycleDiskfiles, false)
	cronManager.Start()

	app_common.ServeForeverWithCleanup(app, &options.HostOptions.BaseOptions, func() {
		hostinfo.Stop()
		storageman.Stop()
		hostmetrics.Stop()
		guestman.Stop()
		hostutils.GetWorkManager().Stop()
	})
}

func (host *SHostService) initHandlers(app *appsrv.Application) {
	guesthandlers.AddGuestTaskHandler("", app)
	storagehandler.AddStorageHandler("", app)
	diskhandlers.AddDiskHandler("", app)
	downloader.AddDownloadHandler("", app)
	kubehandlers.AddKubeAgentHandler("", app)
}