public static SmSchedulePricePath Build(int weekMin, int weekMax, int[] markdownWeeks, SmPriceLadderType ladderType, decimal[] prices)
{
var weekCount = weekMax - weekMin + 1;
if (markdownWeeks.Length == 0)
{
return(new SmSchedulePricePath
{
Prices = Enumerable.Repeat((decimal?)null, weekCount).ToArray(),
Weeks = Enumerable.Range(weekMin, weekCount).ToArray(),
MarkdownCount = markdownWeeks.Length,
LadderType = ladderType
});
}
var result = new decimal?[weekCount];
var pricePathIndex = -1;
var weekNextMarkdown = markdownWeeks[0];
var weekNextMarkdownIndex = 0;
for (var i = 0; i < weekCount; i++)
{
var week = weekMin + i;
if (weekNextMarkdownIndex == 0 && week < weekNextMarkdown)
{
result[i] = null;
continue;
}
if (week == weekNextMarkdown)
{
if (prices.Length - 1 >= pricePathIndex + 1)
{
pricePathIndex++;
}
if (markdownWeeks.Length - 1 >= weekNextMarkdownIndex + 1)
{
weekNextMarkdownIndex++;
weekNextMarkdown = markdownWeeks[weekNextMarkdownIndex];
}
}
result[i] = prices[pricePathIndex];
}
return(new SmSchedulePricePath
{
Prices = result,
Weeks = Enumerable.Range(weekMin, weekCount).ToArray(),
MarkdownCount = markdownWeeks.Length,
LadderType = ladderType
});
}
public static SmSchedulePricePath[] CrossProduct(int[] weeks, int weekMin, int weekMax, SmPriceLadderType ladderType, List <Tuple <int, decimal> > weekPries)
{
var query = weekPries
.GroupBy(x => x.Item1, (x, g) => g.Select(y => y.Item2).ToArray())
.ToArray()
.CartesianProduct()
.Where(x => x.ToPairs().All(y => y.Item1 <= y.Item2))
.Select(x => x.ToArray())
.Where(x => x.Length == x.Distinct().Count())
.Select(x => SmSchedulePricePath.Build(weekMin, weekMax, weeks, ladderType, x));
return(query.ToArray());
}
