using SushiBarContracts.BindingModels;
using SushiBarContracts.SearchModels;
using SushiBarContracts.StoragesContracts;
using SushiBarContracts.ViewModels;
using SushiBarFileImplement.Models;

namespace SushiBarFileImplement.Implements
{
    public class IngredientStorage : IIngredientStorage
    {
        private readonly DataFileSingleton source;
        public IngredientStorage()
        {
            source = DataFileSingleton.GetInstance();
        }
        public List<IngredientViewModel> GetFullList()
        {
            return source.Ingredients.Select(x => x.GetViewModel).ToList();
        }
        public List<IngredientViewModel> GetFilteredList(IngredientSearchModel model)
        {
            if (string.IsNullOrEmpty(model.IngredientName))
            {
                return new();
            }
            return source.Ingredients.Where(x => 
                x.IngredientName.Contains(model.IngredientName)).Select(x => x.GetViewModel).ToList();
        }
        public IngredientViewModel? GetElement(IngredientSearchModel model)
        {
            if (string.IsNullOrEmpty(model.IngredientName) && !model.Id.HasValue)
            {
                return null;
            }
            return source.Ingredients.FirstOrDefault(x =>
                (!string.IsNullOrEmpty(model.IngredientName) && x.IngredientName == 
                model.IngredientName) || (model.Id.HasValue && x.Id == model.Id)) ?.GetViewModel;
        }
        public IngredientViewModel? Insert(IngredientBindingModel model)
        {
            model.Id = source.Ingredients.Count > 0 ? source.Ingredients.Max(x => x.Id) + 1 : 1;
            var newIngredient = Ingredient.Create(model);
            if (newIngredient == null)
            {
                return null;
            }
            source.Ingredients.Add(newIngredient);
            source.SaveIngredients();
            return newIngredient.GetViewModel;
        }
        public IngredientViewModel? Update(IngredientBindingModel model)
        {
            var ingredient = source.Ingredients.FirstOrDefault(x => x.Id == model.Id);
            if (ingredient == null)
            {
                return null;
            }
            ingredient.Update(model);
            source.SaveIngredients();
            return ingredient.GetViewModel;
        }
        public IngredientViewModel? Delete(IngredientBindingModel model)
        {
            var element = source.Ingredients.FirstOrDefault(x => x.Id == model.Id);
            if (element != null)
            {
                source.Ingredients.Remove(element);
                source.SaveIngredients();
                return element.GetViewModel;
            }
            return null;
        }
    }
}