public void Analyse()
{
var compareToMonths = 3;
var currentDate = DateTime.Today;
var currentExchangerate = _list.Last().Value;
var monthlyAverage = GetMonthlyAverage();
var lastThreeMonths = GetLastMonths(compareToMonths);
var lastThreeMonthsAverage = monthlyAverage.TakeLast(compareToMonths).Average(_ => _.Average);
lastThreeMonths.Sort((a, b) => a.Value.CompareTo(b.Value));
var lastThreeMonthsPeak = Math.Round(lastThreeMonths.Last().Value, 2);
var lastThreeMonthLow = Math.Round(lastThreeMonths.First().Value, 2);
var isBelowAverage = currentExchangerate < lastThreeMonthsAverage;
var currentMonthAverage = Math.Round(GetMonthlyAverage(true).Last().Average, 2);
var title = isBelowAverage ? "Rate below average" : "Rate above average";
var percent = isBelowAverage ? Math.Round((currentExchangerate / lastThreeMonthsAverage) * 100, 2) :
Math.Round((currentExchangerate / lastThreeMonthsAverage) * 100 - 100, 2);
var scale = isBelowAverage ? "below" : "above";
var e = new ExchangeRateEvent {
Title = title,
Message = $"The current exchange rate ({_list.Currency}/{_list.CurrencyDenominator}) is {percent}% {scale} the average of the last {compareToMonths} months."
+ Environment.NewLine + Environment.NewLine +
$"Last 3 month exchange rate peak: {lastThreeMonthsPeak} {_list.Unit}"
+ Environment.NewLine +
$"Last 3 month exchange rate low: {lastThreeMonthLow} {_list.Unit}"
+ Environment.NewLine +
$"Current month average: {currentMonthAverage} {_list.Unit}"
+ Environment.NewLine + Environment.NewLine +
$"Current rate: {_list.Last().Value} {_list.Unit}/{_list.CurrencyDenominator}"
};
if (isBelowAverage)
{
RateBelowAverage?.Invoke(this, e);
}
else
{
RateAboveAverage?.Invoke(this, e);
}
}
private static void Analyser_RateAboveAverage(object sender, ExchangeRateEvent e)
{
_notificationManager.Send(e.Title, e.Message);
}