/// <summary>
/// Execute the freezing algorithme depending on the forecast weather.
/// It return a FreezeForcast object which contains
/// a dictionnary of DateTime,FreezingProbability
/// There is four levels of probability :
/// ZERO = 0% of freezing
/// LOW = The probability of freeze is under 50%
/// MEDIUM = The probability of freezing is between 50% and 80%
/// HIGH = The probability of freezing is greater than 80%
/// IMMINENT = The probability of freezing is 100%
/// </summary>
/// <param name="device">Device telemetry with temperature in Celsius</param>
/// <param name="devicePosition"></param>
/// <param name="currentWeather">Weather with temperature in Celsius</param>
/// <param name="forecast">Forecast weather with temperature in Celsius</param>
/// <param name="forecastStation"></param>
/// <returns></returns>
public async Task <FreezeForecast> Execute(IWeather device, IStationPosition devicePosition,
IWeather currentWeather, IEnumerable <IWeather> forecast, IStationPosition forecastStation)
{
if (!forecast.Any())
{
return(null);
}
try
{
FreezeForecast freezeForecast = new FreezeForecast();
double deviceTemperature = device.Temperature;
double estimateDeviceTemperature = await EstimateWeatherByAltitudeDiff(deviceTemperature, forecastStation, devicePosition);
if (estimateDeviceTemperature == 0.0)
{
estimateDeviceTemperature = 1;
}
if (currentWeather.Humidity == 0.0)
{
// to force the coef to be 1
currentWeather.Humidity = device.Humidity;
}
double coefTemperature = Math.Abs(device.Temperature / estimateDeviceTemperature);
double coefHumidity = Math.Abs(device.Humidity / currentWeather.Humidity);
logger.Info($"coef temp. : {coefTemperature}");
logger.Info($"coef hum. : {coefHumidity}");
IWeather theoricWeather = Activator.CreateInstance(device.GetType()) as IWeather;
theoricWeather.Temperature = coefTemperature * estimateDeviceTemperature;
theoricWeather.Humidity = coefHumidity * currentWeather.Humidity;
freezeForecast.FreezingProbabilityList[currentWeather.Date] = GetProbabilityFreezing(theoricWeather);
IEnumerable <IWeather> forecastEstimation = await EstimateWeatherByAltitudeDiffForecast(forecast, forecastStation, devicePosition);
int i = 0;
IWeather forecastItem;
IWeather estimationWeather;
// while not out of range
while (i < forecast.Count() || i < forecastEstimation.Count())
{
forecastItem = forecast.ElementAt(i);
estimationWeather = forecastEstimation.ElementAt(i);
theoricWeather.Temperature = coefTemperature * estimationWeather.Temperature;
theoricWeather.Humidity = coefHumidity * forecastItem.Humidity;
freezeForecast.FreezingProbabilityList[forecastItem.Date] = GetProbabilityFreezing(theoricWeather);
i++;
}
StringBuilder logBuilder = new StringBuilder();
logBuilder.Append($"Freeze probabibility {FreezingProbability.ZERO.ToString()} : {freezeForecast.FreezingProbabilityList.Count(e => e.Value == FreezingProbability.ZERO)}");
logBuilder.Append(" / ");
logBuilder.Append($"Freeze probabibility {FreezingProbability.MINIMUM.ToString()} : {freezeForecast.FreezingProbabilityList.Count(e => e.Value == FreezingProbability.MINIMUM)}");
logBuilder.Append(" / ");
logBuilder.Append($"Freeze probabibility {FreezingProbability.MEDIUM.ToString()} : {freezeForecast.FreezingProbabilityList.Count(e => e.Value == FreezingProbability.MEDIUM)}");
logBuilder.Append(" / ");
logBuilder.Append($"Freeze probabibility {FreezingProbability.HIGH.ToString()} : {freezeForecast.FreezingProbabilityList.Count(e => e.Value == FreezingProbability.HIGH)}");
logBuilder.Append(" / ");
logBuilder.Append($"Freeze probabibility {FreezingProbability.IMMINENT.ToString()} : {freezeForecast.FreezingProbabilityList.Count(e => e.Value == FreezingProbability.IMMINENT)}");
logger.Info(logBuilder.ToString());
freezeForecast.FreezingStart = forecast.OrderBy(e => e.Date).FirstOrDefault().Date;
freezeForecast.FreezingEnd = forecast.OrderBy(e => e.Date).LastOrDefault().Date;
return(freezeForecast);
}
catch (Exception e)
{
logger.Error($"Error occured on executing algorithme", e);
throw new AlgorithmeException("Error occured on executing algorithme", e);
}
}
