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


namespace BankBusinessLogic.BusinessLogics
{
    public class CurrencyPurchaseLogic : ICurrencyPurchaseLogic
    {
        private readonly ILogger _logger;
        private readonly ICurrencyPurchaseStorage _CurrencyPurchaseStorage;
        public CurrencyPurchaseLogic(ILogger<CurrencyPurchaseLogic> logger, ICurrencyPurchaseStorage CurrencyPurchaseStorage)
        {
            _logger = logger;
            _CurrencyPurchaseStorage = CurrencyPurchaseStorage;
        }
        public CurrencyPurchaseViewModel? ReadElement(CurrencyPurchaseSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. Id:{ Id}", model.Id);
            var element = _CurrencyPurchaseStorage.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<CurrencyPurchaseViewModel>? ReadList(CurrencyPurchaseSearchModel? model)
        {
            _logger.LogInformation("ReadList. Id:{ Id}", model?.Id);
            var list = model == null ? _CurrencyPurchaseStorage.GetFullList() : _CurrencyPurchaseStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }
        public bool Create(CurrencyPurchaseBindingModel model)
        {
            CheckModel(model);
            if (_CurrencyPurchaseStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

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

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

        private void CheckModel(CurrencyPurchaseBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (model.BankOperatorId < 0)
            {
                throw new InvalidOperationException("Id оператора банка меньше нуля!");
            }
            if(model.CurrencyId < 0)
            {
                throw new InvalidOperationException("Id валюты меньше нуля!");
            }
            if (model.Amount <= 0) {
                throw new InvalidOperationException("Количество закупленной валюты неположительно!");
            }
            _logger.LogInformation("Id: {Id}. Amount:{ Amount}. BankOperatorId: { BankOperatorId}. CurrencyId: {CurrencyId}.", model.Id, model.Amount, model.BankOperatorId, model.CurrencyId);
        }
    }
}