package com.dougkeen.bart.model;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

public class RealTimeDepartures {
	public RealTimeDepartures(Station origin, Station destination,
			List<Route> routes) {
		this.origin = origin;
		this.destination = destination;
		this.routes = routes;
		this.unfilteredDepartures = new ArrayList<Departure>();
	}

	private Station origin;
	private Station destination;
	private long time;

	private List<Departure> departures;

	final private List<Departure> unfilteredDepartures;

	private List<Route> routes;

	public Station getOrigin() {
		return origin;
	}

	public void setOrigin(Station origin) {
		this.origin = origin;
	}

	public Station getDestination() {
		return destination;
	}

	public void setDestination(Station destination) {
		this.destination = destination;
	}

	public long getTime() {
		return time;
	}

	public void setTime(long time) {
		this.time = time;
	}

	public List<Departure> getDepartures() {
		if (departures == null) {
			departures = new ArrayList<Departure>();
		}
		return departures;
	}

	public void setDepartures(List<Departure> departures) {
		this.departures = departures;
	}

	public void includeTransferRoutes() {
		routes.addAll(origin.getTransferRoutes(destination));
		rebuildFilteredDepaturesCollection();
	}

	public void includeDoubleTransferRoutes() {
		routes.addAll(origin.getDoubleTransferRoutes(destination));
		rebuildFilteredDepaturesCollection();
	}

	private void rebuildFilteredDepaturesCollection() {
		getDepartures().clear();
		for (Departure departure : unfilteredDepartures) {
			addDepartureIfApplicable(departure);
		}
	}

	public void addDeparture(Departure departure) {
		unfilteredDepartures.add(departure);
		addDepartureIfApplicable(departure);
	}

	private void addDepartureIfApplicable(Departure departure) {
		Station destination = Station.getByAbbreviation(departure
				.getTrainDestinationAbbreviation());
		if (departure.getLine() == null)
			return;
		for (Route route : routes) {
			if (route.trainDestinationIsApplicable(destination,
					departure.getLine())) {
				departure.setRequiresTransfer(route.hasTransfer());
				departure
						.setTransferScheduled(Line.YELLOW_ORANGE_SCHEDULED_TRANSFER
								.equals(route.getDirectLine()));
				getDepartures().add(departure);
				departure.calculateEstimates(time);
				return;
			}
		}
	}

	public void sortDepartures() {
		Collections.sort(getDepartures());
	}

	public void finalizeDeparturesList() {
		boolean hasDirectRoute = false;
		for (Departure departure : getDepartures()) {
			if (!departure.getRequiresTransfer()) {
				hasDirectRoute = true;
				break;
			}
		}
		if (hasDirectRoute) {
			Iterator<Departure> iterator = getDepartures().iterator();
			while (iterator.hasNext()) {
				Departure departure = iterator.next();
				if (departure.getRequiresTransfer()
						&& (!departure.isTransferScheduled() || departure
								.getTrainDestination().isBetween(getOrigin(),
										getDestination(), departure.getLine()))) {
					iterator.remove();
				}
			}
		}
		sortDepartures();
	}

	public List<Route> getRoutes() {
		return routes;
	}

	public void setRoutes(List<Route> routes) {
		this.routes = routes;
	}

	@Override
	public String toString() {
		StringBuilder builder = new StringBuilder();
		builder.append("RealTimeDepartures [origin=");
		builder.append(origin);
		builder.append(", destination=");
		builder.append(destination);
		builder.append(", time=");
		builder.append(time);
		builder.append(", departures=");
		builder.append(departures);
		builder.append("]");
		return builder.toString();
	}
}