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 ProceduresLogic : IProceduresLogic
    {
        private readonly ILogger _logger;
        private readonly IProceduresStorage _proceduresStorage;
        public ProceduresLogic(ILogger<ProceduresLogic> logger, IProceduresStorage proceduresStorage)
        {
            _logger = logger;
            _proceduresStorage = proceduresStorage;
        }
        public bool Create(ProceduresBindingModel model)
        {
            CheckModel(model);
            if (_proceduresStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

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

        public ProceduresViewModel? ReadElement(ProceduresSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. ProceduresName:{ProceduresName}. Id:{ Id}", model.ProceduresName, model.Id);
            var element = _proceduresStorage.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<ProceduresViewModel>? ReadList(ProceduresSearchModel? model)
        {
            _logger.LogInformation("ReadList. ProceduresName:{ProceduresName}. Id:{ Id}", model?.ProceduresName, model?.Id);
            var list = model == null ? _proceduresStorage.GetFullList() : _proceduresStorage.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(ProceduresBindingModel model)
        {
            CheckModel(model);
            if (_proceduresStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

        private void CheckModel(ProceduresBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.ProceduresName))
            {
                throw new ArgumentNullException("Нет названия процедуры", nameof(model.ProceduresName));
            }
            if (string.IsNullOrEmpty(model.Type))
            {
                throw new ArgumentNullException("Нет типа процедуры", nameof(model.Type));
            }
            _logger.LogInformation("Procedures. ProceduresName:{ProceduresName}. Type:{ Type}. Id: { Id} ", model.ProceduresName, model.Type, model.Id);
            var element = _proceduresStorage.GetElement(new ProceduresSearchModel
            {
                ProceduresName = model.ProceduresName
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Процедура с таким названием уже есть");
            }
        }
    }
}