using FlowerShopFileImplement.Models;
using FlowerShopFileImplement.Implements;
using FlowerShopContracts.StoragesContracts;
using FlowerShopContracts.ViewModels;
using FlowerShopContracts.SearchModels;
using FlowerShopContracts.BindingModels;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FlowerShopFileImplement.Implements
{
    public class FlowerStorage : IFlowerStorage
    {
        private readonly DataFileSingleton source;
        public FlowerStorage()
        {
            source = DataFileSingleton.GetInstance();
        }
        public List<FlowerViewModel> GetFullList()
        {
            return source.Flowers
            .Select(x => x.GetViewModel)
           .ToList();
        }

        public List<FlowerViewModel> GetFilteredList(FlowerSearchModel model)
        {
            if (string.IsNullOrEmpty(model.FlowerName))
            {
                return new();
            }
            return source.Flowers
            .Where(x => x.FlowerName.Contains(model.FlowerName))
           .Select(x => x.GetViewModel)
           .ToList();
        }

        public FlowerViewModel? GetElement(FlowerSearchModel model)
        {
            if (string.IsNullOrEmpty(model.FlowerName) && !model.Id.HasValue)
            {
                return null;
            }
            return source.Flowers
            .FirstOrDefault(x =>
           (!string.IsNullOrEmpty(model.FlowerName) && x.FlowerName ==
           model.FlowerName) ||
            (model.Id.HasValue && x.Id == model.Id))
            ?.GetViewModel;
        }

        public FlowerViewModel? Insert(FlowerBindingModel model)
        {
            model.Id = source.Flowers.Count > 0 ? source.Flowers.Max(x => x.Id) + 1 : 1;
            var newFlower = Flower.Create(model);
            if (newFlower == null)
            {
                return null;
            }
            source.Flowers.Add(newFlower);
            source.SaveFlowers();
            return newFlower.GetViewModel;
        }

        public FlowerViewModel? Update(FlowerBindingModel model)
        {
            var flower = source.Flowers.FirstOrDefault(x => x.Id ==
           model.Id);
            if (flower == null)
            {
                return null;
            }
            flower.Update(model);
            source.SaveFlowers();
            return flower.GetViewModel;
        }
        public FlowerViewModel? Delete(FlowerBindingModel model)
        {
            var flower = source.Flowers.FirstOrDefault(x => x.Id ==
           model.Id);
            if (flower != null)
            {
                source.Flowers.Remove(flower);
                source.SaveFlowers();
                return flower.GetViewModel;
            }
            return null;
        }

    }
}