using Microsoft.Extensions.Logging;
using RouteGuideContracts.BindingModels;
using RouteGuideContracts.BusinessLogicContracts;
using RouteGuideContracts.SearchModels;
using RouteGuideContracts.StoragesModels;
using RouteGuideContracts.ViewModels;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace RouteGuideBusinessLogic.BusinessLogic
{
    public class StopLogic : IStopLogic
    {
        private readonly ILogger _logger;
        private readonly IStopStorage _stopStorage;

        public StopLogic(ILogger<StopLogic> logger, IStopStorage stopStorage)
        {
            _logger = logger;
            _stopStorage = stopStorage;
        }

        public bool Create(StopBindingModel model)
        {
            CheckModel(model);
            if (_stopStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

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

        public StopViewModel? ReadElement(StopSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. Name:{Name}.Id:{ Id}", model.Name, model.Id);
            var element = _stopStorage.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<StopViewModel>? ReadList(StopSearchModel? model)
        {
            _logger.LogInformation("ReadList. Name:{Name}.Id:{ Id}", model?.Name, model?.Id);
            var list = model == null ? _stopStorage.GetFullList() : _stopStorage.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(StopBindingModel model)
        {
            CheckModel(model);
            if (_stopStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }
        private void CheckModel(StopBindingModel 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));
            }

            _logger.LogInformation("Stop. Name:{Name}. Id: { Id}", model.Name, model.Id);
            var element = _stopStorage.GetElement(new StopSearchModel
            {
                Name = model.Name
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Stop с таким названием уже есть");
            }
        }
    }
}