<!--      AURA Comonent   -->

<aura:component controller="AccountApex" implements="force:appHostable,flexipage:availableForAllPageTypes,flexipage:availableForRecordHome,force:hasRecordId,forceCommunity:availableForAllPageTypes,force:lightningQuickAction" access="global" >
    <aura:handler name="init" value="{!this}" action="{!c.doInit}"/>
    
    <aura:attribute  name="accountList" type="list"/>
    <aura:attribute name="selectedAccount" type="account"/>
    <aura:attribute name="contactList" type="list"/>
   
    <lightning:select name="selectItem" label="Select Account" aura:id="ac" onchange="{!c.getDetail}" >
        <aura:iteration items="{!v.accountList}" var="acc">
            <option label="{!acc.Name}" value="{!acc.Id}" />
        </aura:iteration>
    </lightning:select>
    
    <lightning:select label="contact list" >
    <aura:iteration items="{!v.contactList}" var="con">
        <option label="{!con.LastName}" value="{!con.Id}"/>  
    </aura:iteration> 
   </lightning:select>
    
    
</aura:component>


//   CONTROLLER
({
    doInit : function(component, event, helper) {
        helper.getAllAccount(component, event, helper);
    },
    
    getDetail: function(component, event, helper){
        helper.helperGetDetail(component, event, helper);
    }  
})

//    HELPER

({
getAllAccount : function(component, event, helper) {
        var action=component.get('c.fetchAccount');
        action.setCallback(this,function(response){
           console.log('response===>  '+JSON.stringify(response.getReturnValue()));
            if(response.getReturnValue()!=null){
                console.log('success');
                component.set('v.accountList',response.getReturnValue());
            }
        });
        $A.enqueueAction(action);
    },   
    
        helperGetDetail: function(component, event, helper){
        var acid=component.find('ac').get('v.value');
        console.log(acid);
        var action=component.get('c.getContact');
        action.setParams({
            accid:acid
        });
         action.setCallback(this,function(response){
           console.log('response===>  '+JSON.stringify(response.getReturnValue()));
            if(response.getReturnValue()!=null){
                console.log('success');
                component.set('v.contactList',response.getReturnValue());
            }
        });
        $A.enqueueAction(action);
    },
    
   
})


// APEX
public class AccountApex {

  @Auraenabled
    public static List<account> accountList{get; set;} 
	 @Auraenabled
        public List<contact> contactList{get; set;}
    @Auraenabled
    public static WrapperAccount wrapperInstance{get; set;}
    
    
    @Auraenabled
    public static WrapperAccount fetchAccount(){
       wrapperInstance = new WrapperAccount();
         accountList = new List<account>();
        try{
            
        for(Account accountInstance: [Select Id,Name,Phone from Account WITH SECURITY_ENFORCED]){
            accountList.add(accountInstance);
        }
            wrapperInstance.accList = accountList;
            wrapperInstance.message = 'No Error';
            wrapperInstance.isSuccess = true;
            
        
        }
        catch(exception e){
            System.debug('error--> '+e.getMessage()+' at ling no--> '+e.getLineNumber());
            wrapperInstance.accList = accountList;
            wrapperInstance.message = e.getMessage();
            wrapperInstance.isSuccess = false;
        }
          return wrapperInstance;
    }
	
	 @Auraenabled
    public static WrapperAccount getContact(id accid){
       wrapperInstance = new WrapperAccount();
         contactList = new List<contact>();
        try{
            
        for(Contact accountInstance: [Select Id,Name,Phone from contact where accountid =:accid]){
            contactList.add(accountInstance);
        }
            wrapperInstance.conList = contactList;
            wrapperInstance.message = 'No Error';
            wrapperInstance.isSuccess = true;
            
      
        }
        catch(exception e){
            System.debug('error--> '+e.getMessage()+' at ling no--> '+e.getLineNumber());
            wrapperInstance.accList = contactList;
            wrapperInstance.message = e.getMessage();
            wrapperInstance.isSuccess = false;
        }
          return wrapperInstance;
    }
    
    
    public class WrapperAccount{
        @Auraenabled
        public List<Account> accList{get; set;}
		
		 @Auraenabled
        public List<contact> conList{get; set;}
		
        @Auraenabled
        public Boolean isSuccess{get; set;}
        @Auraenabled
        public String message{get; set;}
        
    }
	}