package usherbrooke.ift630;

import java.util.ArrayList;

public class Bus extends Thread {
	private ArrayList<Passenger>	passengers;
	private ArrayList<Stop>			stops;
	private String					name;
	private int						id;
	private int						maxCapacity;
	private int						currentCapacity;
	private int						timeBetweenStops;
	private int						timeEmbark;
	private Stop					nextStop;

	private int timeEmbark() {
		return (int) (Math.random() * timeEmbark);
	}

	private int timeBetweenStops() {
		return (int) (Math.random() * timeBetweenStops);
	}

	private boolean askStop() {
		boolean res = false;
		for (Passenger p : passengers){
			if (p.getDest() == nextStop) {
				res = true;
				Logger.getInstance().print(id, "Stop asked");
				break;
			}
		}

		return res;
	}

	private Stop goToNextStop() {
		// if no reason to stop, skip current stop
		do {
			try {
				nextStop = stops.remove(0);
			} catch (IndexOutOfBoundsException e) {
				nextStop = null;
			}
		} while ((getNextStopPassengers().isEmpty() || currentCapacity >= maxCapacity) && askStop());

		try {
			Thread.sleep(timeBetweenStops() * 1000);
		} catch (InterruptedException e) {
		}
		return nextStop;
	}

	// TODO what
	private ArrayList<Passenger> getNextStopPassengers() {
		ArrayList<Passenger> res = new ArrayList<Passenger>();

		if (nextStop != null)
			for (Passenger p : passengers) {
				if (p.getDest() == nextStop) {
					res.add(p);
				}

			}

		return res;
	}

	@Override
	public void run() {
		try {
		while (nextStop != null) {
			disembarkPassengers();
			embarkPassengers();

			nextStop = goToNextStop();
		}
		} catch (Exception e) {
			Logger.getInstance().print(id, "[BUS] exception: " + e.getMessage());
		}
		Logger.getInstance().print(id, "[BUS] exiting!");
	}

	Bus(ArrayList<Stop> s, int id, int timeStop, int timeEmbark, int maxCapacity) {
		this.timeBetweenStops = timeStop;
		this.timeEmbark =		timeEmbark;
		this.name =				"Bus n°" + id;
		this.id =				id;
		this.passengers =		new ArrayList<Passenger>();
		this.stops =			s;
		this.nextStop =		stops.remove(0);
		this.currentCapacity =	0;
		this.maxCapacity =		maxCapacity;
	}

	public synchronized void disembarkPassengers() {
		synchronized (nextStop.getMutex()) {
			for (Passenger p : passengers) {
				Logger.getInstance().print(id, "\t[BUS] " + p.getName() + " disembarked " + name);

				if (p.getDest() == nextStop) {
					p.disembark();
					currentCapacity--;
				}
			}
		}
	}

	public synchronized void embarkPassengers() {
		synchronized (nextStop.getMutex()) {
			try {
				ArrayList<Passenger> list = nextStop.getPassengerByDest(stops);
				Logger.getInstance().print(id, "[BUS] hop into " + name + " at stop " + nextStop.getName() + "!");
				Thread.sleep(timeEmbark() * 1000);
				if (currentCapacity >= maxCapacity)
					throw new OverCapacityException("Over bus capacity.");
				for (Passenger p : list) {
					passengers.add(p);
					nextStop.removePassenger(p);
					currentCapacity++;

					Logger.getInstance().print(id,
							"\t[BUS] " + p.getName() + " embarked in " + name + " at " + nextStop.getName());
				}
			} catch (IndexOutOfBoundsException | OverCapacityException | InterruptedException e) {
				Logger.getInstance().print(id, "Exception: " + e.getMessage());
			}
		}
	}

	public void printDetails(int indent) {
		Logger.getInstance().print(id, "\t".repeat(indent) + "---".repeat(3) + " Bus details " + "---".repeat(3));
		Logger.getInstance().print(id, "\t".repeat(indent) + name);
		Logger.getInstance().print(id, "\t".repeat(indent) + "time between stops: " + timeBetweenStops);
		Logger.getInstance().print(id, "\t".repeat(indent) + "max capacity: " + maxCapacity);
		Logger.getInstance().print(id, "\t".repeat(indent) + "current stop: " + nextStop.getName());
		Logger.getInstance().print(id, "\t".repeat(indent) + "stops: ");

		nextStop.printDetails(indent + 1);
		for (Stop s : stops) {
			s.printDetails(indent + 1);
		}
	}

	public void printDetails() {
		printDetails(0);
	}
}