using FurnitureAssemblyContracts.BindingModels;
using FurnitureAssemblyContracts.SearchModels;
using FurnitureAssemblyContracts.StoragesContracts;
using FurnitureAssemblyContracts.ViewModels;
using FurnitureAssemblyListImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FurnitureAssemblyListImplement.Implements
{
    public class FurnitureStorage : IFurnitureStorage
    {
        private readonly DataListSingleton _source;
        public FurnitureStorage()
        {
            _source = DataListSingleton.GetInstance();
        }
        public FurnitureViewModel? Delete(FurnitureBindingModel model)
        {
            for (int i = 0; i < _source.Furnitures.Count; ++i)
            {
                if (_source.Furnitures[i].Id == model.Id)
                {
                    var element = _source.Furnitures[i];
                    _source.Furnitures.RemoveAt(i);
                    return element.GetViewModel;
                }
            }
            return null;
        }

        public FurnitureViewModel? GetElement(FurnitureSearchModel model)
        {
            if (string.IsNullOrEmpty(model.FurnitureName) && !model.Id.HasValue)
            {
                return null;
            }
            foreach (var furniture in _source.Furnitures)
            {
                if ((!string.IsNullOrEmpty(model.FurnitureName) &&
                furniture.FurnitureName == model.FurnitureName) ||
                (model.Id.HasValue && furniture.Id == model.Id))
                {
                    return furniture.GetViewModel;
                }
            }
            return null;
        }

        public List<FurnitureViewModel> GetFilteredList(FurnitureSearchModel model)
        {
            var result = new List<FurnitureViewModel>();
            if (string.IsNullOrEmpty(model.FurnitureName))
            {
                return result;
            }
            foreach (var furniture in _source.Furnitures)
            {
                if (furniture.FurnitureName.Contains(model.FurnitureName))
                {
                    result.Add(furniture.GetViewModel);
                }
            }
            return result;
        }

        public List<FurnitureViewModel> GetFullList()
        {
            var result = new List<FurnitureViewModel>();
            foreach (var furniture in _source.Furnitures)
            {
                result.Add(furniture.GetViewModel);
            }
            return result;
        }

        public FurnitureViewModel? Insert(FurnitureBindingModel model)
        {
            model.Id = 1;
            foreach (var furniture in _source.Furnitures)
            {
                if (model.Id <= furniture.Id)
                {
                    model.Id = furniture.Id + 1;
                }
            }
            var newFurniture = Furniture.Create(model);
            if (newFurniture == null)
            {
                return null;
            }
            _source.Furnitures.Add(newFurniture);
            return newFurniture.GetViewModel;
        }

        public FurnitureViewModel? Update(FurnitureBindingModel model)
        {
            foreach (var furniture in _source.Furnitures)
            {
                if (furniture.Id == model.Id)
                {
                    furniture.Update(model);
                    return furniture.GetViewModel;
                }
            }
            return null;
        }
    }
}