public async Task <List <CountryDisplayDetails> > GetTopTenCountriesByGDP(string year)
{
var listOfCountriesWithHIL = await _apiClientService.GetCountriesWithHighIncomeLevel();
List <CountryDisplayDetails> displayList = new List <CountryDisplayDetails>();
decimal minGDP = 0.0m, maxGDP = 0.0m;
foreach (Country country in listOfCountriesWithHIL)
{
var gdp = await _apiClientService.GetGDPValue(country.Id, year);
if (gdp == null || gdp.Value == null || gdp.Value < minGDP)
{
continue;
}
displayList.Add(new CountryDisplayDetails
{
CountryName = country.Name,
GDPValue = gdp.Value
});
displayList = displayList.OrderByDescending(x => x.GDPValue).ToList();
if (displayList.Count > 10)
{
displayList = displayList.GetRange(0, 10);
maxGDP = displayList[0].GDPValue.GetValueOrDefault();
minGDP = displayList[9].GDPValue.GetValueOrDefault();
}
}
return(displayList);
}