using DressAtelierContracts.BindingModels;
using DressAtelierContracts.SearchModels;
using DressAtelierContracts.StorageContracts;
using DressAtelierContracts.ViewModels;
using DressAtelierListImplement.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DressAtelierListImplement.Implements
{
    public class AtelierStorage : IAtelierStorage
    {
        private readonly DataListSingleton _source;

        public AtelierStorage()
        {
            _source = DataListSingleton.GetInstance();
        }

        public List<AtelierViewModel> GetFullList()
        {
            var result = new List<AtelierViewModel>();
            foreach (var atelier in _source.Ateliers)
            {
                result.Add(atelier.GetViewModel);
            }
            return result;
        }

        public List<AtelierViewModel> GetFilteredList(AtelierSearchModel model)
        {
            var result = new List<AtelierViewModel>();
            if(string.IsNullOrEmpty(model.Name))
            {
                return result;
            }

            var specificAteliers = _source.Ateliers.Where(atelier => atelier.Name.Equals(model.Name));
            
            if(specificAteliers.Any())
            {
                result.Add(specificAteliers.ToArray()[0].GetViewModel);
            }

            return result;
        }

        public AtelierViewModel? GetElement(AtelierSearchModel model)
        {
            if(string.IsNullOrEmpty(model.Name) && !model.ID.HasValue)
            {
                return null;
            }

            if (_source.Ateliers.Where(atelier => (!string.IsNullOrEmpty(model.Name) && atelier.Name.Equals(model.Name)) || (model.ID.HasValue && atelier.ID == model.ID)).Any())
            {
                return _source.Ateliers.Where(atelier => (!string.IsNullOrEmpty(model.Name) && atelier.Name.Equals(model.Name)) || (model.ID.HasValue && atelier.ID == model.ID)).ToArray()[0].GetViewModel;
            }
            return null;
        }

        public AtelierViewModel? Insert(AtelierBindingModel model)
        {
            model.ID = _source.Ateliers.Count + 1;

            var newAtelier = Atelier.Create(model);
            if(newAtelier == null)
            {
                return null;
            }
            _source.Ateliers.Add(newAtelier);
            return newAtelier.GetViewModel;
        }

        public AtelierViewModel? Update(AtelierBindingModel model)
        {
            if (_source.Ateliers.Where(atelier => atelier.ID == model.ID).Any())
            {
                _source.Ateliers.Where(atelier => atelier.ID == model.ID).ToArray()[0].Update(model);
                return _source.Ateliers.Where(atelier => atelier.ID == model.ID).ToArray()[0].GetViewModel;
            }
            return null;  
        }

        public AtelierViewModel? Delete(AtelierBindingModel model)
        {
            for (int i = 0; i < _source.Ateliers.Count; ++i)
            {
                if (_source.Ateliers[i].ID == model.ID)
                {
                    var atelier = _source.Ateliers[i];
                    _source.Ateliers.RemoveAt(i);
                    return atelier.GetViewModel;
                }
            }
            return null;
        }
    }
}