public Tuple <string, int> findAvailableDrone()
{
DateTime currentTime = e.getOccuredDate();
foreach (KeyValuePair <string, DroneStation> dict in stationDict)
{
DroneStation st = dict.Value;
double distance = getDistanceFromRecentEvent(st.stationLat, st.stationLng);
if (st.coverRange > distance)
{
availableStation a = new availableStation();
a.name = dict.Key;
a.distance = distance;
availableStations.Add(a);
}
}
if (availableStations.Count == 0)
{
Console.WriteLine("No available stations (coverage problem)");
e.setResult(Event.eventResult.FAILURE);
e.setReason(Event.failReason.COVERAGE_PROBLEM);
return(new Tuple <string, int>("", -1));
}
else
{
availableStations = availableStations.OrderBy(n => n.distance).ToList();
foreach (availableStation ast in availableStations)
{
DroneStation s = stationDict[ast.name];
s.updateChargingDrones(currentTime);
if (s.drones.Count == 0)
{
continue;
}
else
{
foreach (Drone droneElement in s.drones)
{
double distance = getDistanceFromRecentEvent(s.stationLat, s.stationLng);
if (droneElement.returnStatus() != Drone.droneType.D_FLYING && droneElement.returnAvailDist() > 2 * distance)
{
return(new Tuple <string, int>(s.name, s.drones.IndexOf(droneElement)));
}
}
}
}
Console.WriteLine("No available drones in available stations");
e.setResult(Event.eventResult.FAILURE);
e.setReason(Event.failReason.NO_DRONE);
return(new Tuple <string, int>("", -1));
}
}
private static bool stationsComparator(ref availableStation lhs, ref availableStation rhs)
{
return(lhs.distance < rhs.distance);
}