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

namespace FlowerShopBusinessLogic.BusinessLogics
{
    public class BouquetLogic : IBouquetLogic
    {
        private readonly ILogger _logger;
        private readonly IBouquetStorage _bouquetStorage;

        public BouquetLogic(ILogger<BouquetLogic> logger, IBouquetStorage bouquetStorage)
        {
            _logger = logger;
            _bouquetStorage = bouquetStorage;
        }

        public List<BouquetViewModel>? ReadList(BouquetSearchModel? model)
        {
            _logger.LogInformation("ReadList. BouquetName: {BouquetName}. Id: {Id}", model?.BouquetName, model?.Id);

            var list = model == null ? _bouquetStorage.GetFullList() : _bouquetStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }

            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }

        public BouquetViewModel? ReadElement(BouquetSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            _logger.LogInformation("ReadElement. BouquetName: {BouquetName}. Id: {Id}", model.BouquetName, model.Id);

            var element = _bouquetStorage.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(BouquetBindingModel model)
        {
            CheckModel(model);

            if (_bouquetStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }

            return true;
        }

        public bool Update(BouquetBindingModel model)
        {
            CheckModel(model);

            if (_bouquetStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }

            return true;
        }

        public bool Delete(BouquetBindingModel model)
        {
            CheckModel(model, false);

            _logger.LogInformation("Delete. Id: {Id}", model.Id);
            if (_bouquetStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }

            return true;
        }

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

            if (!withParams)
            {
                return;
            }

            if (string.IsNullOrEmpty(model.BouquetName))
            {
                throw new ArgumentNullException("Нет названия букета", nameof(model.BouquetName));
            }

            if (model.Price <= 0)
            {
                throw new ArgumentNullException("Цена букета должна быть больше 0", nameof(model.Price));
            }

            _logger.LogInformation("Bouquet. BouquetName: {BouquetName}. Price: {Price}. Id: {Id}", model.BouquetName, model.Price, model.Id);

            var element = _bouquetStorage.GetElement(new BouquetSearchModel { BouquetName = model.BouquetName });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Букет с таким названием уже есть");
            }
        }
    }
}