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

namespace FurnitureAssemblyBusinessLogic.BusinessLogic
{
    public class FurnitureLogic : IFurnitureLogic
    {
        private readonly ILogger _logger;

        private readonly IFurnitureStorage _furnitureStorage;

        public FurnitureLogic(ILogger<FurnitureLogic> logger, IFurnitureStorage furnitureStorage)
        {
            _logger = logger;
            _furnitureStorage = furnitureStorage;
        }

        public List<FurnitureViewModel>? ReadList(FurnitureSearchModel? model)
        {
            _logger.LogInformation("ReadList. FurnitureName: {FurnitureName}. Id:{Id}", model?.FurnitureName, model?.Id);

            var list = model == null ? _furnitureStorage.GetFullList() : _furnitureStorage.GetFilteredList(model);

            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");

                return null;
            }

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

            return list;
        }

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

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

            var element = _furnitureStorage.GetElement(model);

            if (element == null)
            {
                _logger.LogWarning("ReadElement element not found");

                return null;
            }

            _logger.LogInformation("Readelement find. Id:{Id}", model.Id);

            return element;
        }

        public bool Create(FurnitureBindingModel model)
        {
            CheckModel(model);

            if (_furnitureStorage.Insert(model) == null)
            {
                _logger.LogWarning("Create operation failed");

                return false;
            }

            return true;
        }

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

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

            return true;
        }

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

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

            if (_furnitureStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");

                return false;
            }

            return true;
        }

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

            if (!withParams)
            {
                return;
            }

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

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

            _logger.LogInformation("Furniture. FurnitureName:{FurnitureName}. Price:{Price}. Id:{Id}",
                model.FurnitureName, model.Price, model.Id);

            var element = _furnitureStorage.GetElement(new FurnitureSearchModel
            {
                FurnitureName = model.FurnitureName,
            });

            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Изделие с таким названием уже есть");
            }
        }
    }
}