using ComputerHardwareStoreContracts.BindingModels;
using ComputerHardwareStoreContracts.BusinessLogicsContracts;
using ComputerHardwareStoreContracts.SearchModels;
using ComputerHardwareStoreContracts.StorageContracts;
using ComputerHardwareStoreContracts.ViewModels;
using Microsoft.Extensions.Logging;

namespace ComputerHardwareStoreBusinessLogic.BusinessLogic
{
    public class VendorLogic : IVendorLogic
    {
        private readonly ILogger _logger;
        private readonly IVendorStorage _vendorStorage;
        public VendorLogic(ILogger<VendorLogic> logger, IVendorStorage vendorStorage)
        {
            _logger = logger;
            _vendorStorage = vendorStorage;
        }
        public List<VendorViewModel>? ReadList(VendorSearchModel? model)
        {
            _logger.LogInformation("ReadList. Login:{Login}.Id:{Id}", model?.Login, model?.Id);
            var list = model == null ? _vendorStorage.GetFullList() : _vendorStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }

        public VendorViewModel? ReadElement(VendorSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. Login:{Login}.Id:{Id}", model.Login, model.Id);
            var element = _vendorStorage.GetElement(model);
            if (element == null)
            {
                _logger.LogWarning("ReadElement element not found");
                return null;
            }
            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
            return element;
        }

        public bool Create(VendorBindingModel model)
        {
            CheckModel(model);
            if (_vendorStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

        public bool Update(VendorBindingModel model)
        {
            CheckModel(model);
            if (_vendorStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

        public bool Delete(VendorBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id:{Id}", model.Id);
            if (_vendorStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }

        private void CheckModel(VendorBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.Login))
            {
                throw new ArgumentNullException("Нет логина работника", nameof(model.Login));
            }
            var element = _vendorStorage.GetElement(new VendorSearchModel
            {
                Login = model.Login
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Работник с таким логином уже есть");
            }
        }
    }
}