package foundation.route;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import foundation.handler.DataPool;
import foundation.handler.IHandler;
import foundation.log.ILogWriter;
import foundation.log.LogCategory;
import foundation.log.LogConfig;


public class ControllerNavigator extends RouteNavigator {

	private static Logger logger;
	private Operation operation;
	
	static {
		logger = LogManager.getLogger(ControllerNavigator.class);
	}
	
	public ControllerNavigator(HttpServletRequest request, String uri, String path, Operation operation, Route route, boolean authorizeSensitive) {
		super(request, uri, path, route, authorizeSensitive);
		this.operation = operation;
	}

	@Override
	public void sendTo(HttpServletResponse response, Object... args) {
		if (LogConfig.IsActive_ControllerNavigator) {
			logger.debug(uri);
		}
		
		IHandler handler;
		try {
			//1. replay options request
	        String method = request.getMethod();
	       
	        if (("OPTIONS").equalsIgnoreCase(method)) {
	        	replyOptions(request, response);
	        	return;
	        }
	        
	        //2. set cross headers
		    setCrossAccessHeaders(response);
			
		    //3. send to controller
			DataPool dataPool = (DataPool)args[0];
			
			if (dataPool == null) {
				dataPool = new DataPool(request);
			}
			
			dataPool.setOperation(operation);
			
			handler = ((ControllerRoute) route).getToObject();
			ILogWriter.write(LogCategory.Data, path);
			handler.receive(operation, dataPool, response);
		} 
		catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	public static void replyOptions(HttpServletRequest request, HttpServletResponse response) throws IOException {
		response.setHeader("Access-Control-Allow-Origin", request.getHeader("Origin"));
		response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
		response.setHeader("Access-Control-Max-Age", "3600");
 
		response.setHeader("Access-Control-Allow-Headers", "Origin, Content-Type, Accept, Authorization");
		response.setHeader("access-control-expose-headers", "Authorization");
		response.setHeader("Access-Control-Allow-Credentials", "true");
		response.setHeader("mode", "no-corred");
		response.setStatus(200);
		
		response.flushBuffer();
	}

	private void setCrossAccessHeaders(HttpServletResponse response) {
        response.setHeader("Access-Control-Allow-Origin", "*");
        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, PUT");
        response.setHeader("Access-Control-Max-Age", "0");
        response.setHeader("Cache-Control","no-cache");
        response.setHeader("Access-Control-Allow-Credentials", "true");
        response.setHeader("XDomainRequestAllowed","1");
        response.setHeader("Access-Control-Allow-Headers", "Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With, Accept, Authorization");
        response.setHeader("access-control-expose-headers", "Authorization");
	}

	public Operation getOperation() {
		return operation;
	}
	
}