package de.srsoftware.web4rail.actions;

import de.srsoftware.web4rail.BaseClass;
import de.srsoftware.web4rail.Range;
import de.srsoftware.web4rail.Route;
import de.srsoftware.web4rail.moving.Train;

public class PreserveRoute extends Action {

	public PreserveRoute(BaseClass parent) {
		super(parent);
	}

	@Override
	public boolean fire(Context context) {
		Train train = context.train();
		Route route = context.route();
		// These are errors:
		if (isNull(train)) return false; 
		if (isNull(route)) return false;
		

		// These are NOT errors:
		if (!train.usesAutopilot()) return true;
		if (train.destination() == route.endBlock()) return true;

		Range waitTime = route.endBlock().getWaitTime(train,route.endDirection);
		if (waitTime.max > 0) {
			LOG.debug("Not preserving route, as train needs to stop in following block!");
			return true; // train is expected to wait in next block.
		}

		train.reserveNext();
		return true;
	}
}