<apex:page standardcontroller="Opportunity_Positioning__c"
           extensions="EditableBuyingInfluenceExtension">
	<apex:sectionheader title="{!$ObjectType.Opportunity_Positioning__c.label} Edit" subtitle="{!IF(ISNULL(Opportunity_Positioning__c.Name), 'New/Edit Opportunity Position', Opportunity_Positioning__c.Name)}"/>
    <apex:form >
	
		 <apex:actionStatus id="eventStatus"  >
             <apex:facet name="start">
              <apex:outputPanel >
                <div id="loadingComponent" 
                     style="width:100%; height:100%; position:absolute; top:0; 
                            left:0; background-color: black; opacity: 0.4; z-index: 999;">
                    <div style="position:absolute;top:50%;left:50%">
                        <apex:image value="/img/loading32.gif"></apex:image> 
                    </div>
                </div>
               </apex:outputPanel>
            </apex:facet>   
        </apex:actionStatus>
		
		<apex:pageMessages id = "messages"/>
		
        <apex:pageblock mode="edit" title="{!$ObjectType.Buying_Influence__c.label} Edit">
            <apex:pageblockbuttons >
                <apex:commandbutton value="Save" action="{!saveChildren}" rerender="messages" status="eventStatus"/>
                <apex:commandbutton value="Cancel" action="{!cancel}" rerender="messages" status="eventStatus"/>
            </apex:pageblockbuttons>
			
            <apex:pageblocksection title="Information" showheader="true" columns="2">
				<apex:inputField value="{!objOP.Name}"/>
				<apex:inputField value="{!objOP.Opportunity__c}"/>
            </apex:pageBlockSection>
			
            <apex:pageblocksection id="childList" columns="1" title="Buying Influence" collapsible="false">
			
                <apex:variable var="rowNum" value="{!0}" />
				
                <apex:outputLabel value="No Buying Influence currently exist. Click below to Add." rendered="{!lstBI.size == 0}"/>
				<apex:pageBlockTable value="{!lstBI}" var="BI" rendered="{!lstBI.size > 0}">
					<apex:column headerValue= "Buying Influence">
						<apex:inputfield value="{!BI.Name}"/>
					</apex:column>	
					<apex:column headerValue= "SCOP">
						<apex:inputfield value="{!BI.SCOP__c}"/>
					</apex:column>	
					<apex:column headerValue= "Influencer Name">
						<apex:inputfield value="{!BI.Influencer_Name__c}"/>
					</apex:column>	
					<apex:column headerValue= "Buying Influence role">
						<apex:inputfield value="{!BI.Buying_influence_role__c}"/>
					</apex:column>	
					<apex:column headerValue= "Degree of Influence">
						<apex:inputfield value="{!BI.Degree_of_Influence__c}"/>
					</apex:column>	
				  
				   </apex:column headerValue="Rating for base covered">
						<apex:inputfield value="{!BI.Rating_for_base_covered__c}" />
					</apex:column>	
					
				   <apex:column headerValue="Equivalent Collinson Stakeholder">
						<apex:inputfield value="{!BI.Equivalent_Collinson_Stakeholder__c}"/>
					</apex:column>	
					
				   <apex:column headerValue="Evidence to support your rating">
						<apex:inputfield value="{!BI.Evidence_to_support_your_rating__c}"/>
					</apex:column>
					
					<apex:column headerValue="">
					
						<apex:commandLink value="Remove" action="{!removeFromList}" rerender="childList,messages" immediate="true" status="eventStatus"> 
							<apex:param name="removeIndex" value="{!rowNum}" assignTo="{!removeIndex}"/>
						</apex:commandLink>
						
						<apex:variable var="rowNum" value="{!rowNum+1}" />
					</apex:column>
					
				</apex:pageBlockTable>
			
			<apex:commandButton value="Add Buying Influence" action="{!addToList}" rerender="childList, messages" immediate="true" "eventStatus"/>
      </apex:pageBlockSection>
</apex:pageblock>
</apex:form>
</apex:page>

public with sharing class EditableBuyingInfluenceExtension 
{
	public Opportunity_Positioning__c objOP 	{	get; set;	}
	public List<Buying_Influence__c> lstBI 		{	get; set;	}
	public Integer removeIndex							{	get; set;	}
	
	public EditableBuyingInfluenceListExtension(ApexPages.StandardController stdController) 
	{
		objOP = new Opportunity_Positioning__c();
		lstBI = new List<Buying_Influence__c>();
		
		if(stdController.getId() != NULL)
		{
			lstBI = [SELECT Id,
                          Name,
                          SCOP__c,
                          Influencer_Name__c,
                          Buying_influence_role__c,
                          Degree_of_Influence__c,
                          Rating_for_base_covered__c,
                          Equivalent_Collinson_Stakeholder__c,
                          Evidence_to_support_your_rating__c,
						  Opportunity_Positioning__c, Opportunity_Positioning__r.Name, Opportunity_Positioning__r.Opportunity__c
                          
                      FROM Buying_Influence__c
                      WHERE Opportunity_Positioning__c =: stdController.getId()];
			if(!lstBI.isEmpty())
			{
				objOP.Id = lstBI[0].Opportunity_Positioning__c;
				objOP.Name = lstBI[0].Opportunity_Positioning__r.Name;
				objOP.Opportunity__c = lstBI[0].Opportunity_Positioning__r.Opportunity__c;
			}
			else
			{
				objOP = [SELECT Id, Name, Opportunity__c FROM Opportunity_Positioning__c WHERE Id =:stdController.getId()];
			}
		}
  }

	public void addToList()
	{
		lstBI.add(new Buying_Influence__c());
	}
	
	public void removeFromList()
	{
		system.debug('===removeIndex==='+removeIndex);
		lstBI.remove(removeIndex);
	}
	
   public PageReference saveChildren(){

      try{
			upsert objOP;
			
			for(Buying_Influence__c objBI : lstBI)
			{
				objBI.Opportunity_Positioning__c = objOP.Id;
			}
			if(!lstBI.isEmpty())
				upsert lstBI;
           PageReference p = new PageReference('/'+objOP.Id);
		   return p;
      }catch(Exception e){
         ApexPages.Message myMsg = new ApexPages.Message(ApexPages.Severity.ERROR, e.getMessage());
            ApexPages.addMessage(myMsg);
		 
       }

       return null;
   }
   
	public PageReference cancel()
    {
        if(objOP.Id != null)
            return new Pagereference('/'+objOP.Id);
         return null;
    }
}