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package info.kwarc.sally4.theo.impl;

import java.util.concurrent.ExecutionException;

import info.kwarc.sally.comm.theo.CloseTheoWindow;
import info.kwarc.sally.comm.theo.OpenTheoWindowRequest;
import info.kwarc.sally.comm.theo.OpenTheoWindowResponse;
import info.kwarc.sally4.components.TemplatingComponent;
import info.kwarc.sally4.docmanager.CallbackManager;
import info.kwarc.sally4.docmanager.SallyMenuItem;
import info.kwarc.sally4.docmanager.impl.SallyMenuItemList;
import info.kwarc.sally4.registration.SallyClient;
import info.kwarc.sally4.servlet.SallyServlet;
import info.kwarc.sally4.theo.Theo;

import org.apache.camel.CamelContext;
import org.apache.camel.Exchange;
import org.apache.camel.Processor;
import org.apache.camel.builder.RouteBuilder;
import org.apache.camel.impl.DefaultCamelContext;
import org.apache.felix.ipojo.annotations.Component;
import org.apache.felix.ipojo.annotations.Invalidate;
import org.apache.felix.ipojo.annotations.Provides;
import org.apache.felix.ipojo.annotations.Requires;
import org.apache.felix.ipojo.annotations.ServiceProperty;
import org.apache.felix.ipojo.annotations.Validate;

import com.google.common.util.concurrent.ListenableFuture;

@Component
@Provides(specifications=Theo.class)
public class TheoInstance extends RouteBuilder implements Theo {

	@Requires
	SallyServlet sallyServlet;
		
	String frameURL;
	
	@Requires
	CallbackManager callbackManager;
	
	@ServiceProperty
	String environmentid;

	@Requires(id="docQueue", filter="(filterThatWillNeverSucceed=1)")
	SallyClient theoClient;
	
	CamelContext context;
	
	@Validate
	void doStart() throws Exception {
		environmentid = theoClient.getEnvironmentID();
		
		context = new DefaultCamelContext();
		context.addComponent("sallyservlet", sallyServlet.getCamelComponent());
		context.addRoutes(this);
		context.start();
	}

	@Invalidate
	void doStop() throws Exception {
		context.stop();
	}

	Processor prepareItems = new Processor() {		
		@Override
		public void process(Exchange exchange) throws Exception {
			String id = exchange.getIn().getHeader("id", String.class);
			String item = exchange.getIn().getHeader("item", String.class);
			SallyMenuItemList items = callbackManager.get(id, SallyMenuItemList.class);

			if (item != null) {
				log.info("Closing id "+items.getTheoID());

				
				SallyMenuItem menuItem = items.getItems().get(Integer.parseInt(item));
				menuItem.run();
				closeWindow(items.getTheoID());
			}
			exchange.getIn().setHeader("id", id);
			exchange.getIn().setBody(items.getItems());
		}
	};
		

	public TheoInstance() {		
	}	

	@Override
	public void configure() throws Exception {
		getContext().addComponent("freemarker", new TemplatingComponent("templates/", getClass().getClassLoader()));

		frameURL = "frameselector"+Long.toHexString(Double.doubleToLongBits(Math.random()));
		
		from("sallyservlet:///"+frameURL)
		.process(prepareItems)
		.to("freemarker:frameselector.html");
	}

	@Override
	public String openNewWindow(String URL, String title, Integer x, Integer y, Integer width,
			Integer height) {
		OpenTheoWindowRequest wnd = new OpenTheoWindowRequest();
		wnd.setTitle(title);
		wnd.setUrl(URL);
		if (x != null)
			wnd.setPosx(x);
		if (y != null)
			wnd.setPosy(y);
		if (width != null)
			wnd.setWidth(width);
		if (height != null)
			wnd.setHeight(height);
		
		ListenableFuture futureResponse = theoClient.sendRequest(wnd, OpenTheoWindowResponse.class);
		OpenTheoWindowResponse response;
		try {
			response = futureResponse.get();
		} catch (InterruptedException | ExecutionException e) {
			e.printStackTrace();
			return null;
		}
		if (response == null)
			return null;
		return response.getId();
	}

	@Override
	public void closeWindow(String id) {
		CloseTheoWindow wnd = new CloseTheoWindow ();
		wnd.setId(id);
		theoClient.sendEvent(wnd);
	}

	@Override
	public String getEnvironmentId() {
		return environmentid;
	}

}