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 SymptomsLogic : ISymptomsLogic
    {
        private readonly ILogger _logger;
        private readonly ISymptomsStorage _symptomsStorage;
        public SymptomsLogic(ILogger<SymptomsLogic> logger, ISymptomsStorage symptomsStorage)
        {
            _logger = logger;
            _symptomsStorage = symptomsStorage;
        }
        public bool Create(SymptomsBindingModel model)
        {
            CheckModel(model);
            if (_symptomsStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

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

        public SymptomsViewModel? ReadElement(SymptomsSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. SymptomsName:{SymptomsName}. Id:{ Id}", model.SymptomName, model.Id);
            var element = _symptomsStorage.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<SymptomsViewModel>? ReadList(SymptomsSearchModel? model)
        {
            _logger.LogInformation("ReadList. SymptomsName:{SymptomsName}. Id:{ Id}", model?.SymptomName, model?.Id);
            var list = model == null ? _symptomsStorage.GetFullList() : _symptomsStorage.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(SymptomsBindingModel model)
        {
            CheckModel(model);
            if (_symptomsStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

        private void CheckModel(SymptomsBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.SymptomName))
            {
                throw new ArgumentNullException("Нет названия симптоматики", nameof(model.SymptomName));
            }
            _logger.LogInformation("Symptoms. SymptomName:{SymptomName}. Id: { Id} ", model.SymptomName, model.Id);
            var element = _symptomsStorage.GetElement(new SymptomsSearchModel
            {
                SymptomName = model.SymptomName
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Симптоматика с таким названием уже есть");
            }
        }
    }
}