// 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 compute

import (
	"fmt"

	"yunion.io/x/jsonutils"

	"yunion.io/x/onecloud/pkg/mcclient"
	"yunion.io/x/onecloud/pkg/mcclient/modulebase"
	"yunion.io/x/onecloud/pkg/mcclient/modules"
	"yunion.io/x/onecloud/pkg/mcclient/modules/identity"
	"yunion.io/x/onecloud/pkg/mcclient/modules/image"
)

type TUsageManager string

const (
	UsageManagerImage    TUsageManager = "image"
	UsageManagerIdentity TUsageManager = "identity"
	UsageManagerK8s      TUsageManager = "k8s"
)

type IUsageManager interface {
	GetUsage(s *mcclient.ClientSession, params jsonutils.JSONObject) (jsonutils.JSONObject, error)
}

type UsageManager struct {
	modulebase.ResourceManager
	managers map[TUsageManager]IUsageManager
}

type HistoryUsageManager struct {
	modulebase.ResourceManager
	managers map[TUsageManager]IUsageManager
}

func (this *UsageManager) RegisterManager(manType TUsageManager, man IUsageManager) {
	if this.managers == nil {
		this.managers = make(map[TUsageManager]IUsageManager, 0)
	}
	this.managers[manType] = man
}

func (this *HistoryUsageManager) RegisterManager(manType TUsageManager, man IUsageManager) {
	if this.managers == nil {
		this.managers = make(map[TUsageManager]IUsageManager, 0)
	}
	this.managers[manType] = man
}

func (this *UsageManager) GetGeneralUsage(session *mcclient.ClientSession, params jsonutils.JSONObject) (jsonutils.JSONObject, error) {
	url := "/usages"
	if params != nil {
		range_type, _ := params.GetString("range_type")
		range_id, _ := params.GetString("range_id")
		if len(range_type) > 0 && len(range_id) > 0 {
			url = fmt.Sprintf("%s/%s/%s", url, range_type, range_id)
		}
		dict := params.(*jsonutils.JSONDict)
		dict.Remove("range_type")
		dict.Remove("range_id")
		qs := dict.QueryString()
		if len(qs) > 0 {
			url = fmt.Sprintf("%s?%s", url, qs)
		}
	}
	return modulebase.Get(this.ResourceManager, session, url, this.Keyword)
}

func (this *UsageManager) GetManagerByType(t TUsageManager) IUsageManager {
	return this.managers[t]
}

func (this *UsageManager) getManagerUsage(manType TUsageManager, s *mcclient.ClientSession, params jsonutils.JSONObject) (jsonutils.JSONObject, error) {
	return this.GetManagerByType(manType).GetUsage(s, params)
}

func (this *UsageManager) GetK8sUsage(s *mcclient.ClientSession, params jsonutils.JSONObject) (jsonutils.JSONObject, error) {
	return this.getManagerUsage(UsageManagerK8s, s, params)
}

func (this *UsageManager) GetIdentityUsage(s *mcclient.ClientSession, params jsonutils.JSONObject) (jsonutils.JSONObject, error) {
	return this.getManagerUsage(UsageManagerIdentity, s, params)
}

func (this *UsageManager) GetImageUsage(s *mcclient.ClientSession, params jsonutils.JSONObject) (jsonutils.JSONObject, error) {
	return this.getManagerUsage(UsageManagerImage, s, params)
}

var (
	Usages        *UsageManager
	HistoryUsages *HistoryUsageManager
)

func init() {
	Usages = &UsageManager{
		ResourceManager: modules.NewComputeManager("usage", "usages",
			[]string{},
			[]string{}),
	}

	modules.RegisterCompute(Usages)

	HistoryUsages = &HistoryUsageManager{
		ResourceManager: modules.NewComputeManager("history-usage", "history-usages",
			[]string{},
			[]string{}),
	}
	modules.RegisterCompute(HistoryUsages)
}

func InitUsages() {
	Usages.RegisterManager(UsageManagerImage, &image.Images)
	Usages.RegisterManager(UsageManagerIdentity, &identity.IdentityUsages)
}
