public AnalyzerResult GetPrediction(Recipe recipe)
{
var rankBreakfast = new Ranking(Category.Breakfast);
var rankLunch = new Ranking(Category.Lunch);
var rankDinner = new Ranking(Category.Dinner);
var rankDessert = new Ranking(Category.Dessert);
// Setup Tournament
this.Compete(recipe, this.breakfastIndex, this.lunchIndex, rankBreakfast, rankLunch, rankDinner, rankDessert);
this.Compete(recipe, this.breakfastIndex, this.dinnerIndex, rankBreakfast, rankLunch, rankDinner, rankDessert);
this.Compete(recipe, this.breakfastIndex, this.dessertIndex, rankBreakfast, rankLunch, rankDinner, rankDessert);
this.Compete(recipe, this.lunchIndex, this.dinnerIndex, rankBreakfast, rankLunch, rankDinner, rankDessert);
this.Compete(recipe, this.lunchIndex, this.dessertIndex, rankBreakfast, rankLunch, rankDinner, rankDessert);
this.Compete(recipe, this.dinnerIndex, this.dessertIndex, rankBreakfast, rankLunch, rankDinner, rankDessert);
// Choose winner
var result = this.GetWinner(rankBreakfast, rankLunch, rankDinner, rankDessert);
return result;
}
private void Compete(Recipe entry, RecipeIndex first, RecipeIndex second, Ranking rankBreakfast, Ranking rankLunch, Ranking rankDinner, Ranking rankDessert)
{
var chance = this.GetPrediction(entry, first, second);
if (chance > 0.5f - Tolerance && chance < 0.5f + Tolerance)
{
return; // No winner
}
var diff = (float)Math.Abs(chance - 0.5);
var winner = chance < 0.5 ? second : first;
if (winner == this.breakfastIndex)
{
rankBreakfast.Score += diff;
}
if (winner == this.lunchIndex)
{
rankLunch.Score += diff;
}
if (winner == this.dinnerIndex)
{
rankDinner.Score += diff;
}
if (winner == this.dessertIndex)
{
rankDessert.Score += diff;
}
}
private AnalyzerResult GetWinner(Ranking rankBreakfast, Ranking rankLunch, Ranking rankDinner, Ranking rankDessert)
{
var meals = new Ranking[] { rankBreakfast, rankLunch, rankDinner, rankDessert };
var sorted = meals.OrderByDescending(m => m.Score).ToArray();
var firstPlace = sorted[0];
var difference = sorted[1].Score / sorted[0].Score;
var secondPlace = difference > SecondPlaceDifferenceTolerance ? sorted[1] : null;
var result = new AnalyzerResult(firstPlace.Type, secondPlace != null ? secondPlace.Type : Category.None);
return result;
}