using AbstractLawFirmContracts.BindingModels;
using AbstractLawFirmContracts.BusinessLogicsContracts;
using AbstractLawFirmContracts.SearchModels;
using AbstractLawFirmContracts.StoragesContracts;
using AbstractLawFirmContracts.ViewModels;
using AbstractLawFirmDataModels.Models;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace AbstractLawFirmBusinessLogic.BusinessLogic
{
    public class ShopLogic : IShopLogic
    {
        private readonly ILogger _logger;

        private readonly IShopStorage _shopStorage;
        public ShopLogic(ILogger<ShopLogic> logger, IShopStorage shopStorage)
        {
            _logger = logger;
            _shopStorage = shopStorage;
        }
        public List<ShopViewModel>? ReadList(ShopSearchModel? model)
        {
            _logger.LogInformation("ReadList. ShopName:{ShopName}.Id:{ Id}", model?.ShopName, model?.Id);

            var list = model == null ? _shopStorage.GetFullList() : _shopStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }

            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }
        public ShopViewModel? ReadElement(ShopSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            _logger.LogInformation("ReadElement. ShopName:{ShopName}.Id:{ Id}", model.ShopName, model.Id);

            var element = _shopStorage.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(ShopBindingModel model)
        {
            CheckModel(model);

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

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

            if (_shopStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }
        public bool SupplyDocuments(ShopSearchModel model, IDocumentModel document, int count)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (document == null)
            {
                throw new ArgumentNullException(nameof(document));
            }
            if (count <= 0)
            {
                throw new ArgumentException("Количество изделий должно быть больше 0", nameof(count));
            }
            _logger.LogInformation("AddPlaneInShop. ShopName:{ShopName}.Id:{ Id}", model.ShopName, model.Id);
            var element = _shopStorage.GetElement(model);
            if (element == null)
            {
                _logger.LogWarning("AddPlaneInShop element not found");
                return false;
            }
            _logger.LogInformation("AddPlaneInShop find. Id:{Id}", element.Id);
            int countDocuments = 0;
            foreach (var c in element.ShopDocuments)
                countDocuments += c.Value.Item2;
            if (count > element.MaxCountDocuments - countDocuments)
            {
                _logger.LogWarning("Required shop will be overflowed");
                return false;
            }
            else
            {
                if (element.ShopDocuments.TryGetValue(document.Id, out var pair))
                {
                    element.ShopDocuments[document.Id] = (document, count + pair.Item2);
                    _logger.LogInformation("AddPlaneInShop. Added {count} {plane} to '{ShopName}' shop", count, document.DocumentName, element.ShopName);
                }
                else
                {
                    element.ShopDocuments[document.Id] = (document, count);
                    _logger.LogInformation("AddPlaneInShop. Added {count} new plane {plane} to '{ShopName}' shop", count, document.DocumentName, element.ShopName);
                }

                _shopStorage.Update(new()
                {
                    Id = element.Id,
                    Address = element.Address,
                    ShopName = element.ShopName,
                    MaxCountDocuments = element.MaxCountDocuments,
                    OpeningDate = element.OpeningDate,
                    ShopDocuments = element.ShopDocuments
                });
            }
            return true;
        }
        private void CheckModel(ShopBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.ShopName))
            {
                throw new ArgumentNullException("Нет названия магазина", nameof(model.ShopName));
            }
            _logger.LogInformation("Shop. ShopName:{ShopName}.Address:{ Address}. Id:{ Id}", model.ShopName, model.Address, model.Id);
            var element = _shopStorage.GetElement(new ShopSearchModel
            {
                ShopName = model.ShopName
            });
            if (element != null && element.Id != model.Id && element.ShopName == model.ShopName)
            {
                throw new InvalidOperationException("Магазин с таким названием уже есть");
            }
        }
        public bool SellDocument(IDocumentModel document, int count)
        {
            return _shopStorage.SellDocument(document, count);
        }
    }
}