using EkzamenContracts.BindingModels;
using EkzamenContracts.BusinessLogicsContracts;
using EkzamenContracts.SearchModels;
using EkzamenContracts.StoragesContract;
using EkzamenContracts.ViewModels;
using Microsoft.Extensions.Logging;

namespace EkzamenBusinessLogic
{
    public class StudentLogic : IStudentLogic
    {
        private readonly ILogger _logger;
        private readonly IStudentStorage _componentStorage;
        public StudentLogic(ILogger<StudentLogic> logger, IStudentStorage componentStorage)
        {
            _logger = logger;
            _componentStorage = componentStorage;
        }
        public List<StudentViewModel>? ReadList(StudentSearchModel? model)
        {
            _logger.LogInformation("ReadList. ComponentName:{ComponentName}.Id:{ Id} ",
                model?.CreatedDateFrom, model?.Id);
        var list = (model == null) ? _componentStorage.GetFullList() :
        _componentStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }
        public StudentViewModel? ReadElement(StudentSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. ComponentName:{ComponentName}.Id:{ Id}", 
                model.CreatedDateFrom, model.Id);
        var element = _componentStorage.GetElement(model);
            if (element == null)
            {
                _logger.LogWarning("ReadElement element not found");
                return null;
            }
            _logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
            return element;
        }
        public bool Create(StudentBindingModel model)
        {
            CheckModel(model);
            if (_componentStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }
        public bool Update(StudentBindingModel model)
        {
            CheckModel(model);
            if (_componentStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }
        public bool Delete(StudentBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id:{Id}", model.Id);
            if (_componentStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }

        private void CheckModel(StudentBindingModel model, bool withParams =
            true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            if (!withParams)
            {
                return;
            }
        }
    }
}