using BookShopContracts.BindingModels;
using BookShopContracts.BusinessLogicsContracts;
using BookShopContracts.SearchModels;
using BookShopContracts.StoragesContracts;
using BookShopContracts.ViewModels;
using BookShopDataModels.Models;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BookShopBusinessLogic.BusinessLogics
{
    public class GenreLogic : IGenreLogic
    {
        private readonly ILogger _logger;
        private readonly IGenreStorage _genreStorage;
        public GenreLogic(ILogger<GenreLogic> logger, IGenreStorage genreStorage)
        {
            _logger = logger;
            _genreStorage = genreStorage;
        }
        public bool Create(GenreBindingModel model)
        {
            CheckModel(model);
            if (_genreStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

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

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

        private void CheckModel(GenreBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.GenreName))
            {
                throw new ArgumentNullException("Нет названия жанра", nameof(model.GenreName));
            }
            _logger.LogInformation("Genre. GenreName: {GenreName}. Id: {Id}.", model.GenreName, model.Id);
            var element = _genreStorage.GetElement(new GenreSearchModel
            {
                GenreName = model.GenreName
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Такой жанр уже есть");
            }
        }
    }
}