Trigger SummingUpMonthlyValue On OTC_Contract_Product_Line_Items__c (After Insert, After Update, After Delete, After UnDelete){
    
    List<Id> accountManagerIds = New List<Id>();
    
    DateTime d = datetime.now();
    String monthName = d.format('MMMMM');
    System.debug('Current Month Name ****** ' + monthName);
    
    If(Trigger.IsInsert || Trigger.IsUpdate || Trigger.IsUnDelete){
         For(OTC_Contract_Product_Line_Items__c contr : Trigger.New){
             If(contr.Account_Manager__c != null){
                 accountManagerIds.add(contr.Account_Manager__c);
             }
         }   
    }
    
    If(Trigger.IsDelete){
        For(OTC_Contract_Product_Line_Items__c contr : Trigger.Old){
           If(contr.Account_Manager__c != null){
                 accountManagerIds.add(contr.Account_Manager__c);
             }
        }
    }
    
    Map<ID, Double > UserWithTotalInvoicevalue = New Map<ID, Double>();
    System.debug('-------------'+accountManagerIds);
    AggregateResult[] aggRes =  [Select Account_Manager__c,
                                        Sum(OTC_Unit_Price__c) sumac 
                                        FROM OTC_Contract_Product_Line_Items__c where Account_Manager__c = :accountManagerIds and OTC_Status__c = 'Active'
                                            Group by Account_Manager__c];//Invoice_Value_Current_Month__c
    System.debug('-------------------'+ aggRes);
    List<OTC_Contract_Product_Line_Items__c> cpliList = [Select Account_Manager__c,OTC_Unit_Price__c,OTC_Month__c,CreatedDate,OTC_Status__c,Month_Finance_Rev_Rec__c FROM OTC_Contract_Product_Line_Items__c where Account_Manager__c =:accountManagerIds and OTC_Status__c = 'Active'];
    Decimal monthlyAchieved = 0;
    Decimal DoubleUp = 0;
    Set<Id> idToSkip = new Set<Id>();
    Integer Month,Year;
    for(OTC_Contract_Product_Line_Items__c cpli: Trigger.New){
        Month = cpli.CreatedDate.month();
        Year = cpli.CreatedDate.Year();
        if( ( Trigger.oldMap != null && cpli.Account_Manager__c != Trigger.oldMap.get(cpli.id).Account_Manager__c ) && (cpli.OTC_Status__c == 'Active') ){
            monthlyAchieved = monthlyAchieved + cpli.OTC_Unit_Price__c;
            idToSkip.add(cpli.id);
        }
    }
    for(OTC_Contract_Product_Line_Items__c cpli: cpliList){
        if(!idToSkip.contains(cpli.id)){
            if((cpli.CreatedDate.month() == Month) && (cpli.CreatedDate.year() == Year) && (cpli.OTC_Status__c == 'Active')  ){
                monthlyAchieved = monthlyAchieved + cpli.OTC_Unit_Price__c;
            }
        }
        if((cpli.OTC_Month__c.month() == Month-1) && (cpli.OTC_Status__c == 'Active') && (cpli.Month_Finance_Rev_Rec__c.month() == Month) ){
            DoubleUp = DoubleUp + cpli.OTC_Unit_Price__c;
        }
    }

    
    for(AggregateResult EveryAR : aggRes )
     {
         
         Id accountManagerId         = (Id)EveryAR.get('Account_Manager__c');
         Decimal TotalInvoiceValue   = (decimal)EveryAR.get('sumac');
         UserWithTotalInvoicevalue.put(accountManagerId ,TotalInvoiceValue);
     }    
     system.debug('-------'+ UserWithTotalInvoicevalue);
     List<Monthly_Target__c> targetFinalListToUpdate = New List<Monthly_Target__c>();
     
     For(Monthly_Target__c targ : [Select Id,No_of_Renewals__c, Portfolio_Total_Revenue__c, Active_Amount_Acheived__c, Monthly_Target_User__c, Start_Date__c
                                     FROM Monthly_Target__c WHERE Monthly_Target_User__c =: accountManagerIds LIMIT 1 ])
     {
         if( targ.Start_Date__c.month() == Month){
             targ.Portfolio_Total_Revenue__c = UserWithTotalInvoicevalue.get(targ.Monthly_Target_User__c);
             //targ.No_of_Renewals__c= UserWithTotalInvoicevalue.get(targ.Monthly_Target_User__c );
             targ.Active_Amount_Acheived__c = monthlyAchieved;
             targ.Double_Up_s_Current_Month__c = DoubleUp;
             targetFinalListToUpdate.add(targ);
         }
     }
     
     try{
         If(!targetFinalListToUpdate.IsEmpty()){
             update targetFinalListToUpdate;
         }
     }
     catch(Exception e){
         System.Debug('Thrown Exception for SummingUpInvoiceValue Trigger Is:: ' + e.getMessage());
     } 
     
    
}

for(OTC_Contract_Product_Line_Items__c cpli: Trigger.New){
        Month = cpli.CreatedDate.month();
        Year = cpli.CreatedDate.Year();
        if( ( (Trigger.IsUpdate || Trigger.IsDelete) && cpli.Account_Manager__c != Trigger.oldMap.get(cpli.id).Account_Manager__c ) && (cpli.OTC_Status__c == 'Active') ){
            monthlyAchieved = monthlyAchieved + cpli.OTC_Unit_Price__c;
            idToSkip.add(cpli.id);
        }
    }