using Microsoft.Extensions.Logging;
using BankYouBankruptContracts.BindingModels;
using BankYouBankruptContracts.BusinessLogicsContracts;
using BankYouBankruptContracts.SearchModels;
using BankYouBankruptContracts.StoragesContracts;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using BankYouBankruptContracts.ViewModels.Client.Default;
using BankYouBankruptContracts.ViewModels.Client.Diagram;
using BankYouBankruptDataModels.Enums;
using DocumentFormat.OpenXml.Drawing;

namespace BankYouBankruptBusinessLogic.BusinessLogics
{
    public class CardLogic : ICardLogic
    {
        private readonly ILogger _logger;
        private readonly ICardStorage _cardStorage;
        private readonly IAccountStorage _accountStorage;
        private readonly IDebitingLogic _debitingLogic;
        private readonly ICreditingLogic _creditingLogic;

        public CardLogic(ILogger<CardLogic> logger, ICardStorage cardStorage, IAccountStorage accountStorage,
            IDebitingLogic debitingLogic, ICreditingLogic creditingLogic) {
            _logger = logger;
            _cardStorage = cardStorage;
            _accountStorage = accountStorage;
            _debitingLogic = debitingLogic;
            _creditingLogic = creditingLogic;
        }

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

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

        public CardViewModel? ReadElement(CardSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. CardNumber:{Number}.Id:{ Id}", model.Number, model.Id);
            var element = _cardStorage.GetElement(model);
            if (element == null)
            {
                _logger.LogWarning("ReadElement element not found");
                return null;
            }
            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
            return element;
        }

        public List<CardViewModel>? ReadList(CardSearchModel? model)
        {
            _logger.LogInformation("ReadList. CardId:{Id}", model?.Id);
            var list = model == null ? _cardStorage.GetFullList() : _cardStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }

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

        public List<ClientDiagramElementsViewModel> GetMonthInfo(int CardId) {

            Dictionary<(int?, int?), int> debitings = _debitingLogic.ReadList(new DebitingSearchModel()
            {
                CardId = CardId,
                Status = StatusEnum.Закрыта
            }).GroupBy(x => new { x.DateClose?.Month, x.DateClose?.Year })
            .Select(x => new { x.Key.Month, x.Key.Year, Sum = x.Select(y => y.Sum).Sum()}).ToDictionary(x => (x.Month, x.Year), x => (x.Sum));
            Dictionary<(int?, int?), int> creditings = _creditingLogic.ReadList(new CreditingSearchModel()
            {
                CardId = CardId,
                Status = StatusEnum.Закрыта
            }).GroupBy(x => new { x.DateClose?.Month, x.DateClose?.Year })
            .Select(x => new { x.Key.Month, x.Key.Year, Sum = x.Select(y => y.Sum).Sum() }).ToDictionary(x => (x.Month, x.Year), x => (x.Sum));

            List<ClientDiagramElementsViewModel> result = new();
            foreach (var key in debitings.Keys.Union(creditings.Keys)) {
                int sum = 0;
                if (debitings.ContainsKey(key)) sum -= debitings.GetValueOrDefault(key);
                if (creditings.ContainsKey(key)) sum += creditings.GetValueOrDefault(key);
                result.Add(new ClientDiagramElementsViewModel() { Name = Enum.GetName(typeof(Months), key.Item1) + " " + key.Item2.ToString(), Value = sum});
            }
            return result;
        }

        private void CheckModel(CardBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.Number))
            {
                throw new ArgumentNullException("Нет номера карты", nameof(model.Number));
            }
            if (string.IsNullOrEmpty(model.CVC))
            {
                throw new ArgumentNullException("Нет СVC карты", nameof(model.CVC));
            }
            if (model.Period < DateTime.Now)
            {
                throw new ArgumentNullException("Нет периода действия", nameof(model.Period));
            }
            var cardElement = _cardStorage.GetElement(new CardSearchModel
            {
                Number = model.Number,
            });

            if (cardElement != null && cardElement.Id != model.Id)
            {
                throw new InvalidOperationException("Карта с таким ноиером уже есть");
            }

            var accountElement = _accountStorage.GetElement(new AccountSearchModel
            {
                Id = model.AccountId,
                ClientId = model.ClientID
            });

            if (accountElement != null && accountElement.ClientId != model.ClientID)
            {
				throw new InvalidOperationException("Это не счёт данного клиента");
			}

            _logger.LogInformation("Card. Number:{Number}.CVC:{CVC}.ClientId:{ClientID}.Patronymic:{Period}.Id:{Id}",
                model.Number, model.CVC, model.Period.ToString(), model.ClientID, model.Id);
        }
    }
}