trigger LeadAssignOwnerByPostalCode on Lead (before insert, before update) {

    List<Lead> lList = new List<Lead>();
    
   
    Map<String,Zip_Code__c> zipCodeMap = new Map<String,Zip_Code__c>();
    
    Map<id, User> userMap = new Map<id, User>();
    
    Set<String> userIds = new Set<String>();
    
    Set<String> zipCodeString = new Set<String>();
    
    List<Zip_Code__c> zipCodeList = new List<Zip_Code__c>();
    
    List<Messaging.SingleEmailMessage> listmail = new List<Messaging.SingleEmailMessage>(); 

    for(Lead l: Trigger.new)
    {       
        
        System.debug('LeadAssignmentByZipCode -- Do_Not_Use_ZipAssignment_del__c ' + l.Do_Not_Apply_Zip_Assignment_Rules__c);
        
        //Do_Not_Use_ZipAssignment_del__c
        if(l.Do_Not_Apply_Zip_Assignment_Rules__c == true || l.LeadSource != 'Lead from Hubspot') continue;
        
        if(Trigger.isUpdate){
            System.debug('LeadAssignmentByZipCode -- Update Trigger -- ');
            Lead oldLead = Trigger.oldMap.get(l.id);
            if(l.PostalCode.equals(oldLead.PostalCode)) continue;
        } else
            System.debug('LeadAssignmentByZipCode -- Insert Trigger -- ');
        
        
        if(l.PostalCode <> null){
            zipCodeString.add(l.PostalCode);
            System.debug('LeadAssignmentByZipCode -- Lead -- ' + l.Name + ' Zip -- ' + l.PostalCode);
                
        }
    }
    
    if(!zipCodeString.IsEmpty())
    {
        System.debug('LeadAssignmentByZipCode -- Leads To Process ' + zipCodeString.size());
      
        zipCodeList = [SELECT  id, Name, UserAssigned__c, Dealer_Lead_Email_Address__c  FROM Zip_Code__c WHERE Name IN: zipCodeString ];
        
    } else{
        System.debug('LeadAssignmentByZipCode -- No Leads To Process');
    }
    
    
    if(!zipCodeString.IsEmpty()){
        
        System.debug('LeadAssignByZip --- zipCodeString Count --> ' + zipCodeString.size());
        
        
        for(Zip_Code__c z: zipCodeList){
            
            if(!zipCodeMap.containsKey(z.Name)){
                zipCodeMap.put(z.name, z);
                userIds.add(z.UserAssigned__c);
            }
            
        }
    }else
        System.debug('LeadAssignByZip --- zipCodeString Count --> zero');
         
        
    if(!userIds.IsEmpty()){
        
        System.debug('LeadAssignByZip --- userIds Count --> ' + userIds.size());
        userMap = new Map<id,User>([SELECT id, email FROM User WHERE id IN: userIDs]);
        
    }else
        System.debug('LeadAssignByZip --- userIds Count --> zero');
            

    for(Lead lead: Trigger.New) {
        
        if(lead.Do_Not_Apply_Zip_Assignment_Rules__c == true) continue;
        
        if(Trigger.isUpdate){
            System.debug('LeadAssignmentByZipCode -- Update Trigger -- ');
            Lead oldLead = Trigger.oldMap.get(lead.id);
            if(lead.PostalCode.equals(oldLead.PostalCode)) continue;
        } else
            System.debug('LeadAssignmentByZipCode -- Insert Trigger -- ');
        
        
        if(zipCodeMap.containsKey(lead.PostalCode)){
            
            Id owner = zipCodeMap.get(lead.PostalCode).UserAssigned__c;
            lead.OwnerId = owner;
            
        
            lead.Dealer_Lead_Person__c = zipCodeMap.get(lead.PostalCode).Dealer_Lead_Email_Address__c;
            //Added by Abhishek : End
            }
            }

}

@isTest(SeeAllData=true)
private class TestLeadAssignmentByZipCode {

    static testMethod void testLeadAssignedByZipCode() {

        try{
            
            test.startTest();
            
            Zip_Code__c  zip = new ZIP_Code__c();
            zip.Name = '20716';
            zip.UserAssigned__c = UserInfo.getUserId();
            
            insert zip;
            
            Lead lead = new Lead();
            
            lead.FirstName = 'James';
            lead.Company = 'Acme';
            lead.Street = '100 West Street';
            lead.City = 'Marlboro';
            lead.State = 'MD';
            lead.PostalCode = '20716';
            
            insert lead;
            
            lead.PostalCode = '20710';
            
            
            update lead;
            
            String s2 = CheckOrganizationID.getServer();
            
            test.stopTest();
            
            
            
            
        }catch (Exception e){
        
            System.Debug('Error While Testing testLeadAssignedByZipCode');
            
        }           

    }
}