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

namespace ConfectioneryBusinessLogic.BusinessLogics
{
    public class SweetsLogic : ISweetsLogic
    {
        private readonly ILogger _logger;
        private readonly ISweetsStorage _sweetsStorage;
        public SweetsLogic(ILogger<SweetsLogic> logger, ISweetsStorage sweetsStorage)
        {
            _logger = logger;
            _sweetsStorage = sweetsStorage;
        }
        public List<SweetsViewModel>? ReadList(SweetsSearchModel? model)
        {
            _logger.LogInformation("ReadList. SushiName: {SushiName}. Id: {Id}", model?.SweetsName, model?.Id);
            var list = model == null ? _sweetsStorage.GetFullList() :
                _sweetsStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count: {Count}", list.Count);
            return list;
        }
        public SweetsViewModel? ReadElement(SweetsSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. SushiName: {SushiName}. Id: {Id}", model.SweetsName, model.Id);
            var element = _sweetsStorage.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(SweetsBindingModel model)
        {
            CheckModel(model);
            if (_sweetsStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }
        public bool Update(SweetsBindingModel model)
        {
            CheckModel(model);
            if (_sweetsStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }
        public bool Delete(SweetsBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id: {Id}", model.Id);
            if (_sweetsStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }
        private void CheckModel(SweetsBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.SweetsName))
            {
                throw new ArgumentNullException("Нет названия сладости", nameof(model.SweetsName));
            }
            if (model.Price <= 0)
            {
                throw new ArgumentNullException("Цена сладости должна быть больше 0",
                    nameof(model.Price));
            }
            _logger.LogInformation("Sweets. SweetsName: {SweetsName}. Cost: {Cost}. Id: {Id}", model.SweetsName, model.Price, model.Id);
            var element = _sweetsStorage.GetElement(new SweetsSearchModel
            {
                SweetsName = model.SweetsName
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Сладости с таким названием уже есть");
            }
        }
    }
}