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

namespace HospitalBusinessLogic.BusinessLogics
{
    public class MedicinesLogic : IMedicinesLogic
    {
        private readonly ILogger _logger;
        private readonly IMedicinesStorage _medicinesStorage;
        private readonly IClientLogic _clientLogic;
        public MedicinesLogic(ILogger<MedicinesLogic> logger, IMedicinesStorage medicinesStorage, IClientLogic clientLogic)
        {
            _logger = logger;
            _medicinesStorage = medicinesStorage;
            _clientLogic = clientLogic;
        }
        public bool Create(MedicinesBindingModel model)
        {
            CheckModel(model);
            if (_medicinesStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

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

        public MedicinesViewModel? ReadElement(MedicinesSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. MedicinesName:{MedicinesName}. Id:{ Id}", model.MedicinesName, model.Id);
            var element = _medicinesStorage.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<MedicinesViewModel>? ReadList(MedicinesSearchModel? model)
        {
            _logger.LogInformation("ReadList. MedicinesName:{MedicinesName}. Id:{ Id}", model?.MedicinesName, model?.Id);
            var list = model == null ? _medicinesStorage.GetFullList() : _medicinesStorage.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(MedicinesBindingModel model)
        {
            CheckModel(model);
            if (_medicinesStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

        private void CheckModel(MedicinesBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.MedicinesName))
            {
                throw new ArgumentNullException("Нет названия лекарства", nameof(model.MedicinesName));
            }
            if (string.IsNullOrEmpty(model.Group))
            {
                throw new ArgumentNullException("Нет группы лекарства", nameof(model.Group));
            }
            _logger.LogInformation("Medicines. MedicinesName:{MedicinesName}. Group:{ Group}. Id: { Id} ", model.MedicinesName, model.Group, model.Id);
            var element = _medicinesStorage.GetElement(new MedicinesSearchModel
            {
                MedicinesName = model.MedicinesName
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Лекарство с таким названием уже есть");
            }
        }
    }
}