/// <summary>
/// Here we generate a week depending on some rules:
/// - Avoid having multiple times the same meal
/// - Avoid having a meal that we already ate before the Minimum Weeks to wait
/// - Get only meals for the selected moments of the days
/// </summary>
/// <param name="user"></param>
/// <param name="maxFailuresCount"></param>
public bool Generate(Users user, int maxFailuresCount)
{
// Get the number of recipes we need.
DateTime minimumWeeksPassed = DateTime.Now.AddDays(-user.TimeBetweenMeals);
int countMeals = user.DailyMeals.Sum(x => x.Meals.Count(y => y.Value));
List <Recipes> recipes = MongoManager.Where <Recipes>(x => x.UserId == user._id && x.Type == Recipes.RecipeTypes.Dish && (!x.LastCooked.HasValue || (x.LastCooked.Value < minimumWeeksPassed)), 0, countMeals)
.OrderBy(_ => Guid.NewGuid()).ToList();
int failuresCount = 0;
while (failuresCount <= maxFailuresCount && recipes.Count < countMeals)
{
int diffMealsCount = countMeals - recipes.Count;
Recipes recipe = MongoManager.Where <Recipes>(x => x.UserId == user._id && x.Type == Recipes.RecipeTypes.Dish && (!x.LastCooked.HasValue || (x.LastCooked.Value < minimumWeeksPassed)), 0, diffMealsCount).OrderBy(_ => Guid.NewGuid()).FirstOrDefault();
if (recipe != null)
{
recipes.Add(recipe);
}
else
{
++failuresCount;
}
}
if (recipes == null || recipes.Count < countMeals)
{
return(false);
}
countMeals = 0;
Days = new List <Day>();
int countDays = 0;
for (int i = 0; i < 7; ++i)
{
Days.Add(new Day {
Position = countDays,
Date = DateTime.Now.AddDays(++countDays),
Meals = new List <Meals>()
});
}
foreach (var i in user.DailyMeals)
{
int index = Days.FindIndex(x => x.Date.DayOfWeek == i.Day);
foreach (var j in i.Meals)
{
if (!j.Value)
{
continue;
}
Days[index].Meals.Add(new Meals {
_id = recipes.First()._id,
NumberOfPeople = 2,
Type = j.Key
});
recipes.RemoveAt(0);
}
}
return(true);
}