// 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 guest

import (
	"context"

	"yunion.io/x/jsonutils"
	"yunion.io/x/pkg/errors"
	"yunion.io/x/pkg/util/sets"

	api "yunion.io/x/onecloud/pkg/apis/compute"
	"yunion.io/x/onecloud/pkg/cloudcommon/db"
	"yunion.io/x/onecloud/pkg/cloudcommon/db/taskman"
	"yunion.io/x/onecloud/pkg/compute/models"
)

type PodCreateTask struct {
	SGuestBaseTask
}

func init() {
	taskman.RegisterTask(PodCreateTask{})
}

func (t *PodCreateTask) OnInit(ctx context.Context, obj db.IStandaloneModel, body jsonutils.JSONObject) {
	t.SetStage("OnPodCreated", nil)
	t.OnWaitPodCreated(ctx, obj, nil)
}

func (t *PodCreateTask) OnWaitPodCreated(ctx context.Context, obj db.IStandaloneModel, data jsonutils.JSONObject) {
	task, err := taskman.TaskManager.NewTask(ctx, "GuestCreateTask", obj, t.GetUserCred(), t.GetParams(), t.GetTaskId(), "", nil)
	if err != nil {
		t.SetStageFailed(ctx, jsonutils.NewString(errors.Wrap(err, "New GuestCreateTask").Error()))
		return
	}
	if err := task.ScheduleRun(nil); err != nil {
		t.SetStageFailed(ctx, jsonutils.NewString(err.Error()))
	}
}

func (t *PodCreateTask) OnPodCreated(ctx context.Context, guest *models.SGuest, data jsonutils.JSONObject) {
	t.SetStage("OnContainerCreated", nil)

	guest.SetStatus(ctx, t.GetUserCred(), api.POD_STATUS_CREATING_CONTAINER, "")
	ctrs, err := models.GetContainerManager().GetContainersByPod(guest.GetId())
	if err != nil {
		t.onCreateContainerError(ctx, guest, errors.Wrapf(err, "get containers by pod %s", guest.GetId()))
		return
	}

	for idx, ctr := range ctrs {
		if err := ctr.StartCreateTask(ctx, t.GetUserCred(), t.GetTaskId(), nil); err != nil {
			t.onCreateContainerError(ctx, guest, errors.Wrapf(err, "start container %d creation task", idx))
			return
		}
	}
}

func (t *PodCreateTask) onCreateContainerError(ctx context.Context, guest *models.SGuest, err error) {
	guest.SetStatus(ctx, t.GetUserCred(), api.POD_STATUS_CREATE_CONTAINER_FAILED, err.Error())
	t.onError(ctx, err)
}

func (t *PodCreateTask) onError(ctx context.Context, err error) {
	t.SetStageFailed(ctx, jsonutils.NewString(err.Error()))
}

func (t *PodCreateTask) OnPodCreatedFailed(ctx context.Context, guest *models.SGuest, data jsonutils.JSONObject) {
	t.SetStageFailed(ctx, data)
}

func (t *PodCreateTask) OnContainerCreated(ctx context.Context, guest *models.SGuest, data jsonutils.JSONObject) {
	ctrs, err := models.GetContainerManager().GetContainersByPod(guest.GetId())
	if err != nil {
		t.SetStageFailed(ctx, jsonutils.NewString(err.Error()))
		return
	}
	isAllCreated := true
	createdStatus := []string{api.CONTAINER_STATUS_RUNNING, api.CONTAINER_STATUS_UNKNOWN, api.CONTAINER_STATUS_CREATED, api.CONTAINER_STATUS_EXITED, api.CONTAINER_STATUS_PROBING}
	for _, ctr := range ctrs {
		if !sets.NewString(createdStatus...).Has(ctr.GetStatus()) {
			isAllCreated = false
		}
	}
	if isAllCreated {
		if jsonutils.QueryBoolean(t.GetParams(), "auto_start", false) {
			t.SetStage("OnContainerStarted", nil)
			task, err := taskman.TaskManager.NewTask(ctx, "PodStartContainerInDependencyOrderTask", guest, t.GetUserCred(), nil, t.GetTaskId(), "", nil)
			if err != nil {
				t.SetStageFailed(ctx, jsonutils.NewString(errors.Wrap(err, "New PodStartContainerInDependencyOrderTask").Error()))
				return
			}
			task.ScheduleRun(nil)
		} else {
			t.SetStage("OnStatusSynced", nil)
			guest.StartSyncstatus(ctx, t.GetUserCred(), t.GetTaskId())
		}
	}
}

func (t *PodCreateTask) OnContainerCreatedFailed(ctx context.Context, guest *models.SGuest, data jsonutils.JSONObject) {
	guest.SetStatus(ctx, t.GetUserCred(), api.POD_STATUS_CREATE_CONTAINER_FAILED, data.String())
	t.SetStageFailed(ctx, data)
}

func (t *PodCreateTask) OnContainerStartedFailed(ctx context.Context, guest *models.SGuest, data jsonutils.JSONObject) {
	guest.SetStatus(ctx, t.GetUserCred(), api.POD_STATUS_CREATE_CONTAINER_FAILED, data.String())
	t.SetStageFailed(ctx, data)
}

func (t *PodCreateTask) OnContainerStarted(ctx context.Context, guest *models.SGuest, data jsonutils.JSONObject) {
	t.SetStage("OnStatusSynced", nil)
	guest.StartSyncstatus(ctx, t.GetUserCred(), t.GetTaskId())
}

func (t *PodCreateTask) OnStatusSynced(ctx context.Context, guest *models.SGuest, data jsonutils.JSONObject) {
	t.SetStageComplete(ctx, nil)
}

func (t *PodCreateTask) OnStatusSyncedFailed(ctx context.Context, guest *models.SGuest, data jsonutils.JSONObject) {
	t.SetStageFailed(ctx, data)
}