using UniversityContracts.BindingModels;
using UniversityContracts.BuisnessLogicContracts;
using UniversityContracts.SearchModels;
using UniversityContracts.StoragesContracts;
using UniversityContracts.ViewModels;
using Microsoft.Extensions.Logging;

namespace UniversityBuisnessLogic
{
    public class ActivityLogic : IActivityLogic
    {
        private readonly ILogger _logger;
        private readonly IActivityStorage _activityStorage;

        public ActivityLogic(ILogger<ActivityLogic> logger, IActivityStorage activityStorage)
        {
            _logger = logger;
            _activityStorage = activityStorage;
        }
        public bool Create(ActivityBindingModel model)
        {
            CheckModel(model);
            if (_activityStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

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

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

        private void CheckModel(ActivityBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (model.Number <= 0)
            {
                throw new ArgumentNullException("Номер занятия должен быть больше 0", nameof(model.Number));
            }

            _logger.LogInformation("Activity. Number:{ComponentName}. Id: {Id}", model.Number, model.Id);
        }
    }
}