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

namespace FlowerShopListImplement.Implements
{
    public class FlowerStorage : IFlowerStorage
    {
        private readonly DataListSingleton _source;
        public FlowerStorage()
        {
            _source = DataListSingleton.GetInstance();
        }
        public List<FlowerViewModel> GetFullList()
        {
            var result = new List<FlowerViewModel>();
            foreach (var flower in _source.Flowers)
            {
                result.Add(flower.GetViewModel);
            }
            return result;
        }
        public List<FlowerViewModel> GetFilteredList(FlowerSearchModel model)
        {
            var result = new List<FlowerViewModel>();
            if (string.IsNullOrEmpty(model.FlowerName))
            {
                return result;
            }
            foreach (var flower in _source.Flowers)
            {
                if (flower.FlowerName.Contains(model.FlowerName))
                {
                    result.Add(flower.GetViewModel);
                }
            }
            return result;
        }
        public FlowerViewModel? GetElement(FlowerSearchModel model)
        {
            if (string.IsNullOrEmpty(model.FlowerName) && !model.Id.HasValue)
            {
                return null;
            }
            foreach (var flower in _source.Flowers)
            {
                if ((!string.IsNullOrEmpty(model.FlowerName) && flower.FlowerName == model.FlowerName) || (model.Id.HasValue && flower.Id == model.Id))
                {
                    return flower.GetViewModel;
                }
            }
            return null;
        }
        public FlowerViewModel? Insert(FlowerBindingModel model)
        {
            model.Id = 1;
            foreach (var flower in _source.Flowers)
            {
                if (model.Id <= flower.Id)
                {
                    model.Id = flower.Id + 1;
                }
            }
            var newFlower = Flower.Create(model);
            if (newFlower == null)
            {
                return null;
            }
            _source.Flowers.Add(newFlower);
            return newFlower.GetViewModel;
        }
        public FlowerViewModel? Update(FlowerBindingModel model)
        {
            foreach (var flower in _source.Flowers)
            {
                if (flower.Id == model.Id)
                {
                    flower.Update(model);
                    return flower.GetViewModel;
                }
            }
            return null;
        }
        public FlowerViewModel? Delete(FlowerBindingModel model)
        {
            for (int i = 0; i < _source.Flowers.Count; ++i)
            {
                if (_source.Flowers[i].Id == model.Id)
                {
                    var element = _source.Flowers[i];
                    _source.Flowers.RemoveAt(i);
                    return element.GetViewModel;
                }
            }
            return null;
        }
    }
}