using BarContracts.BindingModels;
using BarContracts.SearchModels;
using BarContracts.ViewModels;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using BarContracts.StoragesContracts;
using BarFileImplement.Models;


namespace BarFileImplement.Implements
{
    public class CocktailStorage : ICocktailStorage
    {
        private readonly DataFileSingleton source;
        public CocktailStorage()
        {
            source = DataFileSingleton.GetInstance();
        }
        public List<CocktailViewModel> GetFullList()
        {
            return source.Cocktails.Select(x => x.GetViewModel).ToList();
        }
        public List<CocktailViewModel> GetFilteredList(CocktailSearchModel model)
        {
            return source.Cocktails.Where(x => x.Id == model.Id)
                .Select(x => x.GetViewModel)
                .ToList();
        }
        public CocktailViewModel? GetElement(CocktailSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return null;
            }
            return source.Cocktails.FirstOrDefault(x => (!string.IsNullOrEmpty(model.CocktailName) && x.CocktailName == model.CocktailName) || (model.Id.HasValue && x.Id == model.Id))?.GetViewModel;
        }
        public CocktailViewModel? Insert(CocktailBindingModel model)
        {
            model.Id = source.Cocktails.Count > 0 ? source.Cocktails.Max(x => x.Id) + 1 : 1;
            var newCocktail = Cocktail.Create(model);
            if (newCocktail == null)
            {
                return null;
            }
            source.Cocktails.Add(newCocktail);
            source.SaveCocktails();
            return newCocktail.GetViewModel;
        }
        public CocktailViewModel? Update(CocktailBindingModel model)
        {
            var component = source.Cocktails.FirstOrDefault(x => x.Id == model.Id);
            if (component == null)
            {
                return null;
            }
            component.Update(model);
            source.SaveCocktails();
            return component.GetViewModel;
        }
        public CocktailViewModel? Delete(CocktailBindingModel model)
        {
            var component = source.Cocktails.FirstOrDefault(x => x.Id == model.Id);
            if (component == null)
            {
                return null;
            }
            source.Cocktails.Remove(component);
            source.SaveCocktails();
            return component.GetViewModel;
        }
    }
}