trigger BrevoTrigger on Contact (after insert, after update, after delete) {
    if (Trigger.isAfter) {
        if (Trigger.isInsert) {
            for (Contact con : Trigger.new) {
                if (con.Email != null && con.Phone != null) {
                    BrevoContactTrigger_Handler.createContactInBrevo(con.Email, con.FirstName, con.LastName, con.Phone,con.Id);
                }
            }
        } else if (Trigger.isUpdate) {
            for (Contact con : Trigger.new) {
                if (con.Email != null && con.Phone != null) {
                    Contact oldContact = Trigger.oldMap.get(con.Id);
                    if (con.FirstName != oldContact.FirstName || con.LastName != oldContact.LastName || con.Phone != oldContact.Phone) {  
                        BrevoContactTrigger_Handler.updateContactInBrevo(con.Email, con.FirstName, con.LastName, con.Phone, con.Id); 
                    }
                }
            }
        } else if (Trigger.isDelete) {
            for (Contact con : Trigger.old) {
                if (con.Email != null) {
                    BrevoContactTrigger_Handler.deleteContactInBrevo(con.Email);
                }
            }
        }
    }
}