trigger IndvidualEngagementScore on EngagementContact__c(after insert, after update, after delete) {

    Contact objContact;
    String getAccountId;
    Decimal sumPoints = 0;
    Decimal countRecords = 0;

    //Set initial values based on current engagement record's contact and trigger action:
    if (Trigger.isDelete) {
        For(EngagementContact__c delEngagement: trigger.old) {
            objContact = [SELECT id, AccountID FROM Contact WHERE id =: delEngagement.Contact__c];
            getAccountId = objContact.AccountId;
            if (delEngagement.ParticipationPoints__c == NULL) {
                sumPoints = 0;
                countRecords = 0;
            }
            Else {
                sumPoints = sumPoints - delEngagement.ParticipationPoints__c;
                countRecords = countRecords - 1;
            }
        }

    }
    Else {
        For(EngagementContact__c objEngagement: trigger.new) {
            objContact = [SELECT id, AccountID FROM Contact WHERE id =: objEngagement.Contact__c];
            getAccountId = objContact.AccountId;
            sumPoints = sumPoints + objEngagement.ParticipationPoints__c;
            countRecords = countRecords + 1;
            if (Trigger.isUpdate) {
                For(EngagementContact__c oldEngagement: trigger.old) {

                    if (oldEngagement.ParticipationPoints__c == NULL) {
                        sumPoints = 0;
                        countRecords = 0;
                    }
                    Else {
                        sumPoints = sumPoints - oldEngagement.ParticipationPoints__c;
                        countRecords = countRecords - 1;
                    }


                }
            }
        }
    }

    //Get other contacts related to same account and sum their engagement points:   
    Account objAccount = [SELECT id FROM Account WHERE id =: getAccountId];
    List < Contact > contactList = [SELECT id, EngagementPoints__c, EngagementRecords__c FROM Contact WHERE AccountId =: objAccount.Id];
    For(Contact i: contactList) {
        sumPoints = sumPoints + i.EngagementPoints__c;
        countRecords = countRecords + i.EngagementRecords__c;
    }

    //Update the account's engagement score and commit change:
    objAccount.IndividualEngagementScore__c = sumPoints;
    objAccount.IndividualEngagementRecords__c = countRecords;
    Update objAccount;

}

trigger IndividualEngagmentOrgRecalc on Contact(After update, After delete) {


    String getOldAccountId;
    String getNewAccountID;
    Decimal sumPoints = 0;
    Decimal countRecords = 0;

    For(Contact objOldContact: trigger.old) {
        //Get other contacts related to same OLD account and sum their engagement points:   
        Account objOldAccount = [SELECT id FROM Account WHERE id =: objOldContact.AccountID];
        List < Contact > contactOldList = [SELECT id, EngagementPoints__c, EngagementRecords__c FROM Contact WHERE AccountId =: objOldAccount.Id];
        For(Contact i: contactOldList) {
            sumPoints = sumPoints + i.EngagementPoints__c;
            countRecords = countRecords + i.EngagementRecords__c;
        }
        //Update the OLD account's engagement score and commit change:
        objOldAccount.IndividualEngagementScore__c = sumPoints;
        objOldAccount.IndividualEngagementRecords__c = countRecords;
        Update objOldAccount;
    }


    //Reset initial values
    sumPoints = 0;
    countRecords = 0;


    if (Trigger.isDelete) {}
    ELSE {
        For(Contact objNewContact: trigger.New) {
            //Get other contacts related to same OLD account and sum their engagement points:   
            Account objNewAccount = [SELECT id FROM Account WHERE id =: objNewContact.AccountId];
            List < Contact > contactNewList = [SELECT id, EngagementPoints__c, EngagementRecords__c FROM Contact WHERE AccountId =: objNewAccount.Id];
            For(Contact i: contactNewList) {
                sumPoints = sumPoints + i.EngagementPoints__c;
                countRecords = countRecords + i.EngagementRecords__c;
            }

            //Update the OLD account's engagement score and commit change:
            objNewAccount.IndividualEngagementScore__c = sumPoints;
            objNewAccount.IndividualEngagementRecords__c = countRecords;
            Update objNewAccount;
        }
    }
}