package org.simantics.document.server.request;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.simantics.db.ReadGraph;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.layer0.request.VariableRead;
import org.simantics.db.layer0.variable.Variable;
import org.simantics.document.server.JSONObject;

public class NodeRequest extends VariableRead<JSONObject> {
    
    public static String ERRORS = "Errors";

	public NodeRequest(Variable node) {
		super(node);
	}

	@SuppressWarnings("unchecked")
    @Override
	public JSONObject perform(ReadGraph graph) throws DatabaseException {
		
		long s = System.nanoTime();

	    JSONObject staticContent = graph.syncRequest(new NodeRequestStatic(variable));
	    Map<String,Object> dynamicContent = graph.syncRequest(new NodeRequestDynamic(variable));
	    
	    if(dynamicContent.isEmpty()) {
	        return staticContent;
	    }
	    
        JSONObject result = staticContent.clone();
        result.add(dynamicContent);

        if(dynamicContent.containsKey(ERRORS) || staticContent.getJSONField(ERRORS) != null) {
            ArrayList<String> errorList = new ArrayList<String>();
            
            if(dynamicContent.containsKey(ERRORS))
                errorList.addAll((List<String>)dynamicContent.get(ERRORS));
            
            if(staticContent.getJSONField(ERRORS) != null)
                errorList.addAll((List<String>)staticContent.getJSONField(ERRORS));
            
            result.addJSONField(ERRORS, errorList);
        }
        
        if(DocumentRequest.PROFILE) {
        	long dura = System.nanoTime()-s;
        	System.err.println("NodeRequest " + System.identityHashCode(this) + " " + variable.getURI(graph) + " in " + 1e-6*dura + "ms." + result);
        }
        
	    return result;

	}		

}