using Microsoft.Extensions.Logging;
using HospitalContracts.BindingModels;
using HospitalContracts.BusinessLogicsContracts;
using HospitalContracts.SearchModels;
using HospitalContracts.StoragesContracts;
using HospitalContracts.ViewModels;

namespace HospitalBusinessLogic.BusinessLogics
{
    public class DrugLogic : IDrugLogic
    {
        private readonly ILogger logger;
        private readonly IDrugStorage drugStorage;

        public DrugLogic(ILogger<DrugLogic> logger, IDrugStorage drugStorage)
        {
            this.logger = logger;
            this.drugStorage = drugStorage;
        }
        public bool Create(DrugBindingModel model)
        {
            CheckModel(model);
            if(drugStorage.Insert(model) == null)
            {
                logger.LogWarning("Create operation failed");
                return false;
            }
            return true;
        }

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

        public DrugViewModel? ReadElement(DrugSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            logger.LogInformation("ReadElement. DrugName:{Name}.Id:{ Id}", model.Name, model.Id);
            var element = drugStorage.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<DrugViewModel>? ReadList(DrugSearchModel? model)
        {
            logger.LogInformation("ReadList. Name:{Name}. Id:{ Id}", model?.Name, model?.Id);
            var list = model == null ? drugStorage.GetFullList() : drugStorage.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(DrugBindingModel model)
        {
            CheckModel(model);
            if (drugStorage.Update(model) == null)
            {
                logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

        private void CheckModel(DrugBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (model.SymptomId <= 0)
            {
                throw new ArgumentNullException("Неверный идентификатор симптома", nameof(model));
            }
            if (model.ProcedureId <= 0)
            {
                throw new ArgumentNullException("Неверный идентификатор процедуры", nameof(model));
            }
            if (string.IsNullOrEmpty(model.Comment))
            {
                throw new ArgumentNullException("Нет комментария", nameof(model.Comment));
            }
            if (string.IsNullOrEmpty(model.Name))
            {
                throw new ArgumentNullException("Нет названия препарата", nameof(model.Comment));
            }

            var element = drugStorage.GetElement(new DrugSearchModel
            {
                Name = model.Name
            });

            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Препарат с таким названием уже есть");
            }

            logger.LogInformation("Drug. Comment:{Comment}. Id: { Id}", model.Comment, model.Id);
        }
    }
}