private async void CalculateFirstItem(object sender, EventArgs e)
{
if (CurrentViewModel.BulkCalculator)
{
if (!string.IsNullOrEmpty(CurrentViewModel.BulkPrice) &&
!string.IsNullOrEmpty(CurrentViewModel.BulkWeight) && CurrentViewModel.BulkData.ToString() != "")
{
double.TryParse(CurrentViewModel.BulkPrice, out var pri);
double.TryParse(CurrentViewModel.BulkWeight, out var vol);
double.TryParse(CurrentViewModel.PerBulkWeight, out var perWeight);
var dt = perWeight <= 1 ? CurrentViewModel.BulkData.ToString().Trim('s') : CurrentViewModel.BulkData + "";
var orig = dt;
if (vol < perWeight)
{
var output = string.Empty;
switch (CurrentViewModel.BulkData)
{
case WeightType.Grams:
output = WeightType.Kilograms.ToString();
break;
case WeightType.Millilitres:
output = WeightType.Litres.ToString();
break;
}
if (!string.IsNullOrEmpty(output))
{
dt = output;
}
var recalc = await DisplayAlert("Continue?", $"Did you mean {vol} {output}?", "Yes", "No");
if (recalc)
{
vol = vol * 1000;
}
else
{
dt = orig;
}
}
if (!(pri > 0) || !(vol > 0) || !(perWeight > 0))
{
return;
}
//calculate
var res = (vol / perWeight) * pri;
var totalPrice = HelperShuffle.SignificantTruncate(res, 2).ToString(CultureInfo.InvariantCulture);
var pricePerThousand = HelperShuffle.SignificantTruncate((pri / perWeight * 1000), 2).ToString(CultureInfo.InvariantCulture);
Debug.WriteLine($"result: {res}");
var txt = $"Price per {CurrentViewModel.PerBulkWeight} {CurrentViewModel.BulkData} : ${CurrentViewModel.BulkPrice}\nTotal {dt} : {CurrentViewModel.BulkWeight}\nTotal Price : ${totalPrice}\nPrice per 1000 {CurrentViewModel.BulkData} : ${pricePerThousand}";
CurrentViewModel.Stats = txt;
}
else
{
await DisplayAlert("Missing Information", "Please check all the required information is filled in", "OK");
return;
}
return;
}
if ((CurrentViewModel.MyData != CurrentViewModel.MyDataTwo) && CurrentViewModel.CompareTwoProducts)
{
var response = await DisplayAlert("Continue", "You are about to compare two different measurements. Continue?", "OK", "Cancel");
if (!response)
{
return;
}
}
if (!CurrentViewModel.CompareTwoProducts)
{
if (string.IsNullOrEmpty(CurrentViewModel.Price))
{
await DisplayAlert("Missing Information", "Please check all the required information is filled in", "OK");
return;
}
;
double.TryParse(CurrentViewModel.Price, out var pri);
double.TryParse(CurrentViewModel.Volume, out var vol);
if (!(pri > 0) || !(vol > 0))
{
return;
}
//calculate
var res = pri / vol;
//var totalPrice = HelperShuffle.SignificantTruncate(res, 2).ToString(CultureInfo.InvariantCulture);
//var perHundred = HelperShuffle.SignificantTruncate((res * 100), 2).ToString(CultureInfo.InvariantCulture);
Debug.WriteLine($"result: {res}");
var txt = $"Price per {CurrentViewModel.MyData.ToString().TrimEnd('s')} : ${HelperShuffle.SignificantTruncate(res, 2).ToString(CultureInfo.InvariantCulture)}\nPrice per 10 {CurrentViewModel.MyData} : ${HelperShuffle.SignificantTruncate((res * 10), 2).ToString(CultureInfo.InvariantCulture)}\nPrice per 100 {CurrentViewModel.MyData} : ${HelperShuffle.SignificantTruncate((res * 100), 2).ToString(CultureInfo.InvariantCulture)}";
CurrentViewModel.Stats = txt;
}
else
{
//Calculate Two Prices
if (string.IsNullOrEmpty(CurrentViewModel.Price))
{
await DisplayAlert("Missing Information", "Please check all the required information is filled in", "OK");
return;
}
;;
double.TryParse(CurrentViewModel.Price, out var pri);
double.TryParse(CurrentViewModel.Volume, out var vol);
if (!(pri > 0) || !(vol > 0))
{
return;
}
//calculate
var res = pri / vol;
if (string.IsNullOrEmpty(CurrentViewModel.PriceTwo))
{
await DisplayAlert("Missing Information", "Please check all the required information is filled in", "OK");
return;
}
;;
double.TryParse(CurrentViewModel.PriceTwo, out var prit);
double.TryParse(CurrentViewModel.VolumeTwo, out var volt);
if (!(pri > 0) || !(vol > 0))
{
await DisplayAlert("Missing Information", "Please check all the required information is filled in", "OK");
return;
}
;;
//calculate
var rest = prit / volt;
//var trm = CurrentViewModel.MyData.ToString().TrimEnd('s');
Debug.WriteLine($"result: {res}");
var txt = $"First Item:\nPrice per {CurrentViewModel.MyData.ToString().TrimEnd('s')} : ${Math.Round(res, 4)}\nPrice per 10 {CurrentViewModel.MyData} : ${Math.Round(res * 10, 4)}\nPrice per 100 {CurrentViewModel.MyData} : ${Math.Round(res * 100, 4)}\n\n" +
$"Second Item:\nPrice per { CurrentViewModel.MyDataTwo.ToString().TrimEnd('s')} : ${ Math.Round(rest, 4)}\nPrice per 10 { CurrentViewModel.MyDataTwo} : ${ Math.Round(rest * 10, 4).ToString("#.00", CultureInfo.InvariantCulture)}\nPrice per 100 {CurrentViewModel.MyDataTwo} : ${Math.Round(rest * 100, 4).ToString("#.00", CultureInfo.InvariantCulture)}";
CurrentViewModel.Stats = txt;
}
}
