private List <DepreciationInfo> ComputeDepreciation(double bookValue, double scrapValue, int lifeSpan, int frequency,
int DepreciationType, double rate, string assetId, DateTime period, string currency)
{
var depreciatedPeriod = IWSLookUp.GetLastDepreciatedPeriod(assetId);
List <DepreciationInfo> depreciation = new List <DepreciationInfo>();
if (bookValue <= 0 || scrapValue < 0 || lifeSpan <= 0 || bookValue <= scrapValue)
{
return(depreciation);
}
double newBookValue = Math.Round(bookValue, 2);
newBookValue -= scrapValue;
//double depreciationValue = 0;
double depreciationValue = Math.Round((newBookValue * frequency) / lifeSpan, 2);
DepreciationInfo dpInfo = new DepreciationInfo();
for (DateTime p = depreciatedPeriod; p <= period; p = p.AddMonths(1))
{
//depreciationValue = Math.Round((newBookValue * frequency) / lifeSpan, 2);
if (DepreciationType.Equals((int)IWSLookUp.DepreciationType.Degressive))
{
if (lifeSpan > 1)
{
//depreciationValue = Math.Round(rate * newBookValue,2);
depreciationValue = Math.Round(rate * bookValue, 2);
}
}
if (depreciationValue >= newBookValue)
{
newBookValue = Math.Round(scrapValue, 2);
}
else
{
//if (DepreciationType.Equals((int)IWSLookUp.DepreciationType.StraightLine))
//{
// newBookValue -= Math.Round(depreciationValue / frequency,2);
//}
//if (DepreciationType.Equals((int)IWSLookUp.DepreciationType.Degressive))
//{
// newBookValue -= Math.Round(depreciationValue/frequency,2);
//}
newBookValue -= Math.Round(depreciationValue / frequency, 2);
}
DateTime dateTimePeriod = p;
string stringMonth = dateTimePeriod.Month < 10 ?
"0" + dateTimePeriod.Month.ToString() :
dateTimePeriod.Month.ToString();
string stringPeriod = dateTimePeriod.Year.ToString() + stringMonth;
dpInfo = new DepreciationInfo
{
TransId = assetId,
Period = stringPeriod,
StraightLineDepreciation = 0,
StraightLineBookValue = 0,
Depreciation = Math.Round(depreciationValue / frequency, 2),
Accumulation = 0,
BookValue = newBookValue,
Percentage = 0,
Currency = currency
};
if (!IsPreviousDepreciated(dpInfo.TransId, dpInfo.Period))
{
depreciation.Add(dpInfo);
}
if (newBookValue <= 0 || newBookValue <= scrapValue)
{
return(depreciation);
}
}
return(depreciation);
}
private List <DepreciationInfo> ComputeDepreciation(double costValue, double scrapValue, int lifeSpan, int frequency,
string transId, DateTime startDate, string currency)
{
List <DepreciationInfo> depreciation = new List <DepreciationInfo>();
if (costValue <= 0 || scrapValue < 0 || lifeSpan <= 0 || costValue <= scrapValue)
{
return(depreciation);
}
double accumulation = 0;
double bookValue = costValue - scrapValue;
double yearlyDepreciation = bookValue / lifeSpan;
double straightLineBookValue = costValue;
double expense = 0;
int sum = lifeSpan * (lifeSpan + 1) / 2;
int totalPeriod = lifeSpan;
DateTime dateTimePeriod = startDate;
string stringPeriod;
string stringMonth;
for (int i = 0; i < lifeSpan; i++)
{
double percentage = totalPeriod / (double)sum;
straightLineBookValue -= yearlyDepreciation;
expense = bookValue * percentage;
costValue -= expense;
accumulation += expense;
dateTimePeriod = dateTimePeriod.AddMonths(1);
stringMonth = dateTimePeriod.Month < 10 ?
"0" + dateTimePeriod.Month.ToString() :
dateTimePeriod.Month.ToString();
stringPeriod = dateTimePeriod.Year + "-" + stringMonth;
DepreciationInfo dpInfo = new DepreciationInfo
{
TransId = transId,
Period = stringPeriod,
StraightLineDepreciation = yearlyDepreciation,
StraightLineBookValue = straightLineBookValue,
Depreciation = expense,
Accumulation = accumulation,
BookValue = costValue,
Percentage = percentage * 100,
Currency = currency
};
depreciation.Add(dpInfo);
totalPeriod--;
}
return(depreciation);
}
