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

namespace ComputerStoreBusinessLogic.BusinessLogic
{
    public class ConsignmentLogic : IConsignmentLogic
    {
        private readonly ILogger _logger;
        private readonly IConsignmentStorage _consignmentStorage;
        public ConsignmentLogic(ILogger<ConsignmentLogic> logger, IConsignmentStorage consignmentStorage)
        {
            _logger = logger;
            _consignmentStorage = consignmentStorage;
        }

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

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

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

        public ConsignmentViewModel? ReadElement(ConsignmentSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            _logger.LogInformation("ReadElement. Consignment ID:{ ID}", model.ID);

            var element = _consignmentStorage.GetElement(model);

            if (element == null)
            {
                _logger.LogWarning("ReadElement element not found");
                return null;
            }

            _logger.LogInformation("ReadElement find. Consignment ID:{ID}", element.ID);
            return element;
        }

        public List<ConsignmentViewModel>? ReadList(ConsignmentSearchModel? model)
        {
            _logger.LogInformation("ReadList. Consignment ID:{ ID}", model?.ID);

            var list = model == null ? _consignmentStorage.GetFullList() : _consignmentStorage.GetFilteredList(model);

            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }

        private void CheckModel(ConsignmentBindingModel model, bool withParams = true)
        {
            if (model == null) { return; }
            if (!withParams) { return; }
            if (model.Price <= 0) { throw new ArgumentNullException("Invalid consignment's price", nameof(model)); }
            if (string.IsNullOrEmpty(model.OrderID.ToString())) { throw new ArgumentNullException("Invalid Consignment's order ID", nameof(model)); }

            _logger.LogInformation("Consignment. Consignment ID:{ ID}. Order ID:{ OrderID}.", model.ID, model.OrderID);
        }
    }
}