// Send follow up notification to ERC team
trigger outpatientFollowUp on Opportunity (before insert, before update) 
{
	// Get Oppy record that has just changed to admitted
	Set<Id> admOpp = new Set<Id>();
	for (Opportunity oppLoop : Trigger.new) 
	{
		if (oppLoop.StageName == 'Admitted' && oppLoop.Admission_Date__c != null) {
			admOpp.add(oppLoop.Id);
		}
	}

	// Get ERC Treatment Team Members
	List<ERC_Treatment_Member__c> ListercTTs = [SELECT Id, Provider_Email__c FROM ERC_Treatment_Member__c WHERE Admission__c IN:admOpp] ;
	
	//Map<Id,ERC_Treatment_Member__c> ercTTsmap = new Map<Id,ERC_Treatment_Member__c>([SELECT Id, Provider_Email__c FROM ERC_Treatment_Member__c WHERE Admission__c IN:admOpp])    
	//Set<Id> ercTTs = ercTTsmap.keyset();
    
	// Create a master list to hold the emails to send
	List<Messaging.SingleEmailMessage> mails = new List<Messaging.SingleEmailMessage>();

	for(ERC_Treatment_Member__c teamMember : ListercTTs) 
	{
		if (teamMember.Provider_Email__c != null) 
		{

		  // Create new Email
		  Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();
		
		  // Set list of people who should get the email
		  List<String> sendTo = new List<String>();
		  sendTo.add(teamMember.Provider_Email__c);
		  mail.setToAddresses(sendTo);

		  // Set ID of template
		  mail.setTemplateId('00X0G000001jlXV');
		
		  // Set who the email is sent from
		  mail.setReplyTo('lauren.ake@eatingrecovery.com');
		
		  // Add email to master list
		  mails.add(mail);
		}
	}
  // Send all emails
  Messaging.sendEmail(mails);
}