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

namespace STOBusinessLogic
{
    public class TechnicalWorkLogic : ITechnicalWorkLogic
    {
        private readonly ILogger _logger;
        private readonly ITechnicalWorkStorage _TechnicalWorkStorage;
        public TechnicalWorkLogic(ILogger<TechnicalWorkLogic> logger, ITechnicalWorkStorage TechnicalWorkStorage)
        {
            _logger = logger;
            _TechnicalWorkStorage = TechnicalWorkStorage;
        }

        public List<TechnicalWorkViewModel>? ReadList(TechnicalWorkSearchModel? model)
        {
            _logger.LogInformation("ReadList. Id:{ Id}", model?.Id);
            var list = model == null ? _TechnicalWorkStorage.GetFullList() : _TechnicalWorkStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }
        public TechnicalWorkViewModel? ReadElement(TechnicalWorkSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement.Id:{ Id}", model.Id);
            var element = _TechnicalWorkStorage.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(TechnicalWorkBindingModel model)
        {
            CheckModel(model);
            if (_TechnicalWorkStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

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

        private void CheckModel(TechnicalWorkBindingModel model, bool withParams =
        true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.Name))
            {
                throw new ArgumentNullException("Нет названия",
               nameof(model.Name));
            }
            if (string.IsNullOrEmpty(model.Description))
            {
                throw new ArgumentNullException("Нет описания для ТО",
               nameof(model.Name));
            }
            //по умолчанию если дата не была присвоена вручную то мы ей ставили минимальное значение
            if (model.Date == DateTime.MinValue)
            {
                throw new ArgumentNullException("Нет даты",
               nameof(model.Date));
            }
            _logger.LogInformation("TechnicalWork. Name: {Name}.Id: { Id}", model.Name, model.Id);
            //имена ТО должны быть уникальными? 
            var element = _TechnicalWorkStorage.GetElement(new TechnicalWorkSearchModel
            {
                Name = model.Name
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("ТО с таким названием уже есть");
            }
        }
    }
}