public with sharing class installNewsObjectController {

//get sobject Name
public String sObjectName{get;set;}

// get sobject Label
public String sObjectLabel{get;set;}

//for delete sobject from this Object
public String deleteSelected{get;set;}

private String SOBJECT_FIELD_NAME;
private String SOBJECT_FIELD_LABEL;

private String SELECTED_DELETE;

public MetadataService.AsyncResult result {get;set;}
    public SelectOption[] selectedsobject { get; set; }
    public SelectOption[] allsobject {get; set;}   
   
    public SelectOption[] deletionSobject { get; set; }
    public SelectOption[] existingsobject {get; set;}   
    public String message {get; set;}

// create Field for custom object
public PageReference createField(){
       
        // Create a Custom Field
        MetadataService.CustomField customField = new MetadataService.CustomField();     
        customField.fullName = 'SA_S3_File__c.'+SOBJECT_FIELD_LABEL.replaceAll(' ','')+'__c';       
        customField.label = SOBJECT_FIELD_LABEL;
        system.debug('zzzzzzz'+ customField.label);
        customField.referenceTo = SOBJECT_FIELD_NAME;
        customField.relationshipLabel = (SOBJECT_FIELD_LABEL+'_SA_Files').replaceAll(' ','');
        customField.relationshipName = SOBJECT_FIELD_LABEL.replaceAll(' ','');
        customField.type_x = 'Lookup';         
        result = createService().create(new List<MetadataService.Metadata> { customField })[0];    
         system.debug('@@@@@@@'+result);
        // Display status of the request
        displayStatus();  
        return null;
    }


    //constructor
    public installNewsObjectController() {
       
        //get inintialize
        init();
       
        //check Already existing Object
        alreadySelectedObject();
         
    }
   
    public void init(){    
        
        selectedsobject = new List<SelectOption>();       
         List<Schema.SObjectType> listOfSobject = Schema.getGlobalDescribe().Values();  
         List<SelectOption> options = new List<SelectOption>();
         allsobject = new List<SelectOption>();
         options.add(new SelectOption('','---None---'));
          for(Schema.SObjectType sObj : listOfSobject){
                       
             if( !sObj.getDescribe().isCustomSetting()
                 && (sObj.getDescribe().getName()== 'Account'
                 || sObj.getDescribe().getName() == 'Contact'
                 || sObj.getDescribe().getName()== 'Opportunity'
                 || sObj.getDescribe().isCustom())){               
                allsobject.add(new SelectOption(sObj.getDescribe().getName()+'#'+sObj.getDescribe().getLabel(),sObj.getDescribe().getLabel()));   
               system.debug('<<<<<<<'+allsobject);
             }       
          }
         allsobject.sort();
    }

public PageReference deleteField(){
       
        // Delete a Custom Field
        MetadataService.CustomField customField = new MetadataService.CustomField();
        customField.fullName = 'SA_S3_File__c.'+SELECTED_DELETE.replaceAll(' ','_');
       
                           
        system.debug('&&&&&&&'+customField.fullName );
        result = createService().deleteMetadata(new List<MetadataService.Metadata> { customField })[0]; 
        system.debug('######'+result);   
        list<SA_Upload_Setting__c> setting = [Select id from SA_Upload_Setting__c where Object_Name__c =:'Opportunity'];
        delete setting;
        system.debug('aaaaaaaa'+setting); 
        // Display status of the request
        checkStatus();
        return null;  
    }
   
   
    public PageReference checkStatus(){    
        // Check status of the request
        result = createService().checkStatus(new List<String> { result.Id })[0];
        system.debug('************'+result);
        displayStatus();       
        return null;   
    }
   
    private void displayStatus(){
    
        // Inspect the AsyncResult and display the result
        ApexPages.addMessage(
            new ApexPages.Message(ApexPages.Severity.Info,
                result.done ? 'Request completed' : 'Request in progress...'));
        if(result.state == 'Error')
            ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.Error, result.message));
        if(result.done)
            result = null;
    }
       
    private static MetadataService.MetadataPort createService(){
     
        // Create the Metadata API service stub and authenticate
        MetadataService.MetadataPort service = new MetadataService.MetadataPort();
        service.SessionHeader = new MetadataService.SessionHeader_element();
        service.SessionHeader.sessionId = UserInfo.getSessionId();
        return service;    
    }


   
   
   
    public void alreadySelectedObject(){
    
      SObjectType ObjectType =  Schema.getGlobalDescribe().get('SA_S3_File__c');
      Schema.DescribeSObjectResult R = ObjectType.getDescribe();
   Map<String,Schema.SObjectField> fieldsMap = R.fields.getMap();
  
   deletionSobject = new List<SelectOption>();       
         List<Schema.SObjectType> listOfSobject = Schema.getGlobalDescribe().Values();  
         List<SelectOption> options = new List<SelectOption>();
         existingsobject = new List<SelectOption>();
           
    for(String ObjField : fieldsMap.keySet()){
                
         if((fieldsMap.get(ObjField).getDescribe().isCustom() && String.valueOf(fieldsMap.get(ObjField).getDescribe().getType()) == 'REFERENCE'))
            existingsobject.add(new SelectOption(fieldsMap.get(ObjField).getDescribe().getName(),fieldsMap.get(ObjField).getDescribe().getLabel()));
                   
        }   
    }

    public PageReference createFields() {
       
        message = 'Selected object: ';
        Boolean first = true;
        for ( SelectOption so : selectedsobject ) {
           
            if (!first) {
                message += ', ';
            }
            SOBJECT_FIELD_NAME = so.getValue().split('#')[0].trim();
            SOBJECT_FIELD_LABEL = so.getLabel();
            createField();
            message += so.getLabel() + ' (' + so.getValue() + ')';
            first = false;
        }       
        return null;      
    }
   
      public PageReference deleteFields() {
       
        message = 'Deleted Fields:';
        Boolean first = true;
        for ( SelectOption so : deletionSobject ) {
           
            if (!first) {
                message += ', ';
            }
            SELECTED_DELETE = so.getValue();           
            deleteField();
            message += so.getLabel() + ' (' + so.getValue() + ')'; 
            system.debug('^^^^^^^^^^'+message);
            first = false;
        }       
        return null;      
    }
   
}