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

namespace PolyclinicBusinessLogic.BusinessLogics
{
    public class ProcedureLogic : IProcedureLogic
    {

        private readonly ILogger logger;
        private readonly IProcedureStorage procedureStorage;

        public ProcedureLogic(ILogger<ProcedureLogic> logger, IProcedureStorage procedureStorage)
        {
            this.logger = logger;
            this.procedureStorage = procedureStorage;
        }
        public bool Create(ProcedureBindingModel model)
        {
            CheckModel(model);
            if (procedureStorage.Insert(model) == null)
            {
                logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

        public bool Delete(ProcedureBindingModel model)
        {
            CheckModel(model, false);

            logger.LogInformation("Delete Id:{Id}", model.Id);
            if(procedureStorage.Delete(model) == null)
            {
                logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }

        public ProcedureViewModel? ReadElement(ProcedureSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            logger.LogInformation("ReadElement. ProcedureName:{ProcedureName}.Id:{ Id}", model.Name, model.Id);
            var element = procedureStorage.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<ProcedureViewModel>? ReadList(ProcedureSearchModel? model)
        {
            logger.LogInformation("ReadList. Name:{Name}. Id:{ Id}", model?.Name, model?.Id);
            var list = model == null ? procedureStorage.GetFullList() : procedureStorage.GetFilteredList(model);
            if (list == null)
            {
                logger.LogWarning("ReadList return null list");
                return new List<ProcedureViewModel>();
            }
            logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }

        public bool Update(ProcedureBindingModel model)
        {
            CheckModel(model);
            if (procedureStorage.Update(model) == null)
            {
                logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

        private void CheckModel(ProcedureBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.Name))
            {
                throw new ArgumentNullException("Нет названия процедуры", nameof(model.Name));
            }
            logger.LogInformation("Procedure. Name:{Name}. Id: { Id}", model.Name, model.Id);

            var element = procedureStorage.GetElement(new ProcedureSearchModel
            {
                Name = model.Name
            });

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