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

namespace BankBusinessLogic.BusinessLogics
{
    public class OperatorLogic : IOperatorLogic
    {
        private readonly ILogger _logger;
        private readonly IOperatorStorage _operatorStorage;

        public OperatorLogic(ILogger<OperatorLogic> logger, IOperatorStorage operatorStorage)
        {
            _logger = logger;
            _operatorStorage = operatorStorage;
        }

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

        public OperatorViewModel? ReadElement(OperatorSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. Id:{Id}", model.Id);
            var element = _operatorStorage.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(OperatorBindingModel model)
        {
            CheckModel(model);
            if (_operatorStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }
        public bool Update(OperatorBindingModel model)
        {
            CheckModel(model);
            if (_operatorStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

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

        private void CheckModel(OperatorBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.FirstName))
            {
                throw new ArgumentNullException("Нет имени оператора", nameof(model.FirstName));
            }
            if (string.IsNullOrEmpty(model.LastName))
            {
                throw new ArgumentNullException("Нет фамилии оператора", nameof(model.LastName));
            }
            if (string.IsNullOrEmpty(model.Login))
            {
                throw new ArgumentNullException("Нет логина оператора", nameof(model.Login));
            }
            if (string.IsNullOrEmpty(model.Password))
            {
                throw new ArgumentNullException("Нет пароля оператора", nameof(model.Password));
            }
            _logger.LogInformation("Operator. LastName:{LastName}. FirstName:{FirstName}. Login:{Login}. Password:{Password}. Id:{Id}", model.LastName, model.FirstName, model.Login, model.Password, model.Id);
            var element = _operatorStorage.GetElement(new OperatorSearchModel
            {
                Login = model.Login
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Оператор с таким логином уже есть");
            }
        }
    }
}