//elastic-apm-js-core 的ServiceFactory提供的TransactionService是返回的单例模式
//暂时只能从源代码库中拉取原始Transaction
import Transaction  from 'elastic-apm-js-core/src/performance-monitoring/transaction'
import { UserContext } from '../instance/type'
import * as Tools from "../tool";



class TracerTransaction {
    private serviceFactory: any;
    //part
    private customInitialized = false;
    private customServiceFactory:any
    private customPerformanceMonitoring: any;
    private customApmServer: any



    constructor(serviceFactory,newServiceFactory) {
        this.serviceFactory = serviceFactory
        this.customServiceFactory = newServiceFactory
    }


    public createTransaction = (name: string, type: string) => {
        var transactionService = this.serviceFactory.getService(
            "TransactionService"
        );
        return transactionService.startTransaction(name, type);
    };


    // custom transcation
    public initCustomTransaction = (config) =>{
        //part server init config
        const { agentName,version, transactionDurationThreshold } = config
        var ConfigService= this.customServiceFactory.getService("ConfigService");
        ConfigService.setConfig(config);
        this.customServiceFactory.init();
        //create server
        this.customPerformanceMonitoring = this.customServiceFactory.getService("PerformanceMonitoring");
        this.customPerformanceMonitoring.init();
        this.customPerformanceMonitoring.cancelPatchSub();
        this.customApmServer = this.customServiceFactory.getService('ApmServer')
        this.customInitialized = true
    }

    public setCustomTransactionUserInfo = (userInfo:UserContext) => {
        var configService = this.customServiceFactory.getService("ConfigService");
        configService.setUserContext(userInfo);
    }

    public createCustomEventTransaction = (name:string,type:string,options?:any) => {
        var self = this
        if(!self.customInitialized){
            return false;
        }
        var _option = Tools.extend({
            transactionSampleRate:1
        },options)
        var transaction = new Transaction(name,type,_option)
        //添加onEnd事件
        Object.defineProperty(transaction,'onEnd',{
            enumerable: false,
            configurable: false,
            writable: false,
            value:function(){
                if(this instanceof Transaction ){
                    self.customPerformanceMonitoring.prepareTransaction(this)
                    let payload = self.customPerformanceMonitoring.createTransactionDataModel(this)
                    self.customApmServer.addTransaction(payload)
                }
            }
        })
        return transaction
    }
    
}



export default TracerTransaction;