using CanteenContracts.BindingModels;
using CanteenContracts.BusinessLogicsContracts;
using CanteenContracts.SearchModel;
using CanteenContracts.StoragesContracts;
using CanteenContracts.View;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace CanteenBusinessLogic.BusinessLogics
{
    public class CookLogic : ICookLogic
    {
        private readonly ILogger _logger;
        private readonly ICookStorage _cookStorage;

        public CookLogic(ILogger<CookLogic> logger, ICookStorage cookStorage)
        {
            _logger = logger;
            _cookStorage = cookStorage;
        }

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

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

            return true;
        }

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

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

            return true;
        }

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

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

            var element = _cookStorage.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<CookViewModel>? ReadList(CookSearchModel? model)
        {
            _logger.LogInformation("ReadList. FIO: {FIO}. Id: {Id}", model?.FIO, model?.Id);

            var list = model == null ? _cookStorage.GetFullList() : _cookStorage.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(CookBindingModel model)
        {
            CheckModel(model);

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

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

            if (!withParams)
            {
                return;
            }

            if (string.IsNullOrEmpty(model.FIO))
            {
                throw new ArgumentNullException("Нет ФИО у повара", nameof(model.FIO));
            }

            if (model.ManagerId <= 0)
            {
                throw new ArgumentNullException("id менеджера должен быть больше 0", nameof(model.ManagerId));
            }

            if (string.IsNullOrEmpty(model.Position))
            {
                throw new ArgumentNullException("У повара нет должности", nameof(model.Position));
            }

            _logger.LogInformation("Cook. FIO: {FIO}. ManagerId: {ManagerId}. Position: {Position}. Id: {Id}", model.FIO, model.ManagerId, model.Position, model.Id);

            var element = _cookStorage.GetElement(new CookSearchModel { Id = model.Id });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Такой повар уже есть");
            }
        }
    }
}