// 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 logclient

import (
	"context"
	"fmt"
	"strings"
	"time"

	"yunion.io/x/jsonutils"
	"yunion.io/x/log"
	"yunion.io/x/pkg/appctx"
	"yunion.io/x/pkg/util/stringutils"
	"yunion.io/x/pkg/util/timeutils"
	"yunion.io/x/pkg/utils"
	"yunion.io/x/sqlchemy"

	api "yunion.io/x/onecloud/pkg/apis/logger"
	"yunion.io/x/onecloud/pkg/appsrv"
	"yunion.io/x/onecloud/pkg/cloudcommon/consts"
	"yunion.io/x/onecloud/pkg/mcclient"
	"yunion.io/x/onecloud/pkg/mcclient/auth"
	"yunion.io/x/onecloud/pkg/mcclient/modules/logger"
	"yunion.io/x/onecloud/pkg/util/ctx"
	// "yunion.io/x/onecloud/pkg/mcclient/modules/websocket"
)

type SessionGenerator func(ctx context.Context, token mcclient.TokenCredential, region, apiVersion string) *mcclient.ClientSession

var (
	DefaultSessionGenerator = auth.GetSession
)

// golang 不支持 const 的string array, http://t.cn/EzAvbw8
var BLACK_LIST_OBJ_TYPE = []string{} // "parameter"}

var logclientWorkerMan *appsrv.SWorkerManager

func init() {
	logclientWorkerMan = appsrv.NewWorkerManager("LogClientWorkerManager", 1, 50, false)
}

type IObject interface {
	GetId() string
	GetName() string
	Keyword() string
}

type sSimpleObject struct {
	id      string
	name    string
	keyword string
}

func (s sSimpleObject) GetId() string {
	return s.id
}

func (s sSimpleObject) GetName() string {
	return s.name
}

func (s sSimpleObject) Keyword() string {
	return s.keyword
}

func NewSimpleObject(id, name, keyword string) IObject {
	return sSimpleObject{
		id:      id,
		name:    name,
		keyword: keyword,
	}
}

type IVirtualObject interface {
	IObject
	GetOwnerId() mcclient.IIdentityProvider
}

type IModule interface {
	Create(session *mcclient.ClientSession, params jsonutils.JSONObject) (jsonutils.JSONObject, error)
}

type IStartable interface {
	GetStartTime() time.Time
}

// save log to db.
func AddSimpleActionLog(model IObject, action string, iNotes interface{}, userCred mcclient.TokenCredential, success bool) {
	addLog(model, action, iNotes, userCred, success, time.Time{}, &logger.Actions, "", "")
}

func AddSimpleActionLog2(model IObject, action string, iNotes interface{}, userCred mcclient.TokenCredential, success bool, severity api.TEventSeverity, kind api.TEventKind) {
	addLog(model, action, iNotes, userCred, success, time.Time{}, &logger.Actions, severity, kind)
}

func AddActionLogWithContext(ctx context.Context, model IObject, action string, iNotes interface{}, userCred mcclient.TokenCredential, success bool) {
	addLog(model, action, iNotes, userCred, success, appctx.AppContextStartTime(ctx), &logger.Actions, "", "")
}

func AddActionLogWithContext2(ctx context.Context, model IObject, action string, iNotes interface{}, userCred mcclient.TokenCredential, success bool, severity api.TEventSeverity, kind api.TEventKind) {
	addLog(model, action, iNotes, userCred, success, appctx.AppContextStartTime(ctx), &logger.Actions, severity, kind)
}

func AddActionLogWithStartable(task IStartable, model IObject, action string, iNotes interface{}, userCred mcclient.TokenCredential, success bool) {
	addLog(model, action, iNotes, userCred, success, task.GetStartTime(), &logger.Actions, "", "")
}

func AddActionLogWithStartable2(task IStartable, model IObject, action string, iNotes interface{}, userCred mcclient.TokenCredential, success bool, severity api.TEventSeverity, kind api.TEventKind) {
	addLog(model, action, iNotes, userCred, success, task.GetStartTime(), &logger.Actions, severity, kind)
}

// add websocket log to notify active browser users
// func PostWebsocketNotify(model IObject, action string, iNotes interface{}, userCred mcclient.TokenCredential, success bool) {
// 	addLog(model, action, iNotes, userCred, success, time.Time{}, &websocket.Websockets)
// }

func addLog(model IObject, action string, iNotes interface{}, userCred mcclient.TokenCredential, success bool, startTime time.Time, module IModule, severity api.TEventSeverity, kind api.TEventKind) {
	// avoid log loop
	if !consts.OpsLogEnabled() && utils.IsInStringArray(action, []string{
		ACT_CREATE,
	}) {
		return
	}
	if ok, _ := utils.InStringArray(model.Keyword(), BLACK_LIST_OBJ_TYPE); ok {
		log.Errorf("不支持的 actionlog 类型")
		return
	}
	if action == ACT_UPDATE {
		if iNotes == nil {
			return
		}
		if uds, ok := iNotes.(sqlchemy.UpdateDiffs); ok && len(uds) == 0 {
			return
		}
	}

	notes := stringutils.Interface2String(iNotes)

	objId := model.GetId()
	if len(objId) == 0 {
		objId = "-"
	}
	objName := model.GetName()
	if len(objName) == 0 {
		objName = "-"
	}

	logentry := jsonutils.NewDict()

	logentry.Add(jsonutils.NewString(objName), "obj_name")
	logentry.Add(jsonutils.NewString(model.Keyword()), "obj_type")
	logentry.Add(jsonutils.NewString(objId), "obj_id")
	logentry.Add(jsonutils.NewString(action), "action")
	logentry.Add(jsonutils.NewString(userCred.GetUserId()), "user_id")
	logentry.Add(jsonutils.NewString(userCred.GetUserName()), "user")
	logentry.Add(jsonutils.NewString(userCred.GetTenantId()), "tenant_id")
	logentry.Add(jsonutils.NewString(userCred.GetTenantName()), "tenant")
	logentry.Add(jsonutils.NewString(userCred.GetDomainId()), "domain_id")
	logentry.Add(jsonutils.NewString(userCred.GetDomainName()), "domain")
	logentry.Add(jsonutils.NewString(userCred.GetProjectDomainId()), "project_domain_id")
	logentry.Add(jsonutils.NewString(userCred.GetProjectDomain()), "project_domain")
	logentry.Add(jsonutils.NewString(strings.Join(userCred.GetRoles(), ",")), "roles")
	logentry.Add(jsonutils.NewString(userCred.GetLoginIp()), "ip")
	logentry.Add(jsonutils.NewBool(userCred.IsSystemAccount()), "is_system_account")

	service := consts.GetServiceType()
	if len(service) > 0 {
		logentry.Add(jsonutils.NewString(service), "service")
	}

	if !startTime.IsZero() {
		logentry.Add(jsonutils.NewString(timeutils.FullIsoTime(startTime)), "start_time")
	}

	if virtualModel, ok := model.(IVirtualObject); ok {
		ownerId := virtualModel.GetOwnerId()
		if ownerId != nil {
			projectId := ownerId.GetProjectId()
			if len(projectId) > 0 {
				logentry.Add(jsonutils.NewString(projectId), "owner_tenant_id")
			}
			domainId := ownerId.GetProjectDomainId()
			if len(domainId) > 0 {
				logentry.Add(jsonutils.NewString(domainId), "owner_domain_id")
			}
		}
	}

	if !success {
		// 失败日志
		logentry.Add(jsonutils.JSONFalse, "success")
		if len(severity) == 0 {
			logentry.Add(jsonutils.NewString(string(api.SeverityError)), "severity")
		}
	} else {
		// 成功日志
		logentry.Add(jsonutils.JSONTrue, "success")
		if len(severity) == 0 {
			logentry.Add(jsonutils.NewString(string(api.SeverityInfo)), "severity")
		}
	}

	if len(severity) > 0 {
		logentry.Add(jsonutils.NewString(string(severity)), "severity")
	}
	if len(kind) > 0 {
		logentry.Add(jsonutils.NewString(string(kind)), "kind")
	}

	logentry.Add(jsonutils.NewString(notes), "notes")

	task := &logTask{
		userCred: userCred,
		api:      module,
		logentry: logentry,
	}
	// keystone no need to auth
	// if auth.IsAuthed() {
	//	task.userCred = auth.AdminCredential()
	// }

	logclientWorkerMan.Run(task, nil, nil)
}

type logTask struct {
	userCred mcclient.TokenCredential
	api      IModule
	logentry *jsonutils.JSONDict
}

func (t *logTask) Run() {
	ctx := ctx.CtxWithTime()
	ctx = context.WithValue(ctx, appctx.APP_CONTEXT_KEY_APPNAME, consts.GetServiceType())
	s := DefaultSessionGenerator(ctx, t.userCred, "")
	_, err := t.api.Create(s, t.logentry)
	if err != nil {
		log.Errorf("create action log %s failed %s", t.logentry, err)
	}
}

func (t *logTask) Dump() string {
	return fmt.Sprintf("logTask %v %s", t.api, t.logentry)
}