using ComputerShopContracts.BindingModels;
using ComputerShopContracts.BusinessLogicContracts;
using ComputerShopContracts.SearchModels;
using ComputerShopContracts.StorageContracts;
using ComputerShopContracts.ViewModels;
using ComputerShopDataModels.Enums;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ComputerShopBusinessLogic.BusinessLogics
{
    public class SupplyLogic : ISupplyLogic
    {
        private readonly ILogger _logger;
        private readonly ISupplyStorage _supplyStorage;
        public SupplyLogic(ILogger logger, ISupplyStorage supplyStorage)
        {
            _logger = logger;
            _supplyStorage = supplyStorage;
        }
        public bool Create(SupplyBindingModel model)
        {
            CheckModel(model);
            if (_supplyStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }
        public bool Delete(SupplyBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id:{Id}", model.Id);
            if (_supplyStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }

        public SupplyViewModel? ReadElement(SupplySearchModel model)
        {
            throw new NotImplementedException();
        }

        public List<SupplyViewModel>? ReadList(SupplySearchModel? model)
        {
            _logger.LogInformation("ReadList. Supplyid:{ Id}", model?.Id);
            var list = model == null ? _supplyStorage.GetFullList() : _supplyStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }

        public bool TakeInWork(SupplyBindingModel model)
        {
            return StatusUpdate(model, SupplyStatus.Отправляется);
        }
        public bool Finish(SupplyBindingModel model)
        {
            return StatusUpdate(model, SupplyStatus.Отправлено);
        }
        public bool Update(SupplyBindingModel model)
        {
            throw new NotImplementedException();
        }
        private void CheckModel(SupplyBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
        }
        public bool StatusUpdate(SupplyBindingModel model, SupplyStatus _newStatus)
        {
            var viewModel = _supplyStorage.GetElement(new SupplySearchModel { Id = model.Id });
            if (viewModel == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (viewModel.Status + 1 != _newStatus)
            {
                _logger.LogWarning("Status update to " + _newStatus.ToString() + " operation failed. Order status incorrect.");
                return false;
            }
            model.Status = _newStatus;
            if (model.Status == SupplyStatus.Отправлено) model.DateImplement = DateTime.Now;
            else
            {
                model.DateImplement = viewModel.DateImplement;
            }
            CheckModel(model, false);
            if (_supplyStorage.Update(model) == null)
            {
                model.Status--;
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }
    }
}