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

namespace LawFirmBusinessLogic.BusinessLogics
{
    public class BlankLogic : IBlankLogic
    {
        private readonly ILogger _logger;
        private readonly IBlankStorage _blankStorage;
        public BlankLogic(ILogger<BlankLogic> logger, IBlankStorage blankStorage)
        {
            _logger = logger;
            _blankStorage = blankStorage;
        }
        public List<BlankViewModel>? ReadList(BlankSearchModel? model)
        {
            _logger.LogInformation("ReadList. BlankName:{BlankName}.Id:{Id}", 
                model?.BlankName, model?.Id);
            var list = model == null ? _blankStorage.GetFullList() :
                                   _blankStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }
        public BlankViewModel? ReadElement(BlankSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. BlankName:{BlankName}.Id:{Id}", 
                model.BlankName, model.Id);
            var element = _blankStorage.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(BlankBindingModel model)
        {
            CheckModel(model);
            if (_blankStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;            
        }
        public bool Update(BlankBindingModel model)
        {
            CheckModel(model);
            if (_blankStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }
        public bool Delete(BlankBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id:{Id}", model.Id);
            if (_blankStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }
        private void CheckModel(BlankBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.BlankName))
            {
                throw new ArgumentNullException("Нет названия компонента",
               nameof(model.BlankName));
            }
            if (model.Price <= 0)
            {
                throw new ArgumentNullException("Цена компонента должна быть больше 0", 
                    nameof(model.Price));
            }
            _logger.LogInformation("Blank. BlankName:{BlackName}.Price:{Price}. Id: {Id}", 
                model.BlankName, model.Price, model.Id);
            var element = _blankStorage.GetElement(
                new BlankSearchModel
                {
                    BlankName = model.BlankName
                }
            );
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Компонент с таким названием уже есть");
            }
        }
    }
}