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


namespace TravelCompanyBusinessLogic.BusinessLogic
{
    public class ConditionLogic : IConditionLogic
    {
        private readonly ILogger _logger;
        private readonly IConditionStorage _ConditionStorage;
        public ConditionLogic(ILogger<ConditionLogic> logger, IConditionStorage ConditionStorage)
        {
            _logger = logger;
            _ConditionStorage = ConditionStorage;
        }
        public List<ConditionViewModel>? ReadList(ConditionSearchModel? model)
        {
            _logger.LogInformation("ReadList. ConditionName:{ConditionName}.Id:{ Id}", model?.ConditionName, model?.Id);
            var list = model == null ? _ConditionStorage.GetFullList() : _ConditionStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }
        public ConditionViewModel? ReadElement(ConditionSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. ConditionName:{ConditionName}.Id:{ Id}", model.ConditionName, model.Id);
            var element = _ConditionStorage.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(ConditionBindingModel model)
        {
            CheckModel(model);
            if (_ConditionStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }
        public bool Update(ConditionBindingModel model)
        {
            CheckModel(model);
            if (_ConditionStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }
        public bool Delete(ConditionBindingModel model)
        {
            CheckModel(model, false);
            _logger.LogInformation("Delete. Id:{Id}", model.Id);
            if (_ConditionStorage.Delete(model) == null)
            {
                _logger.LogWarning("Delete operation failed");
                return false;
            }
            return true;
        }
        private void CheckModel(ConditionBindingModel model, bool withParams =
       true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.ConditionName))
            {
                throw new ArgumentNullException("Нет названия компонента",
               nameof(model.ConditionName));
            }
            if (model.Cost <= 0)
            {
                throw new ArgumentNullException("Цена компонента должна быть больше 0", nameof(model.Cost));
            }
            _logger.LogInformation("Condition. ConditionName:{ConditionName}.Cost:{ Cost}.Id: { Id}", model.ConditionName, model.Cost, model.Id);
            var element = _ConditionStorage.GetElement(new ConditionSearchModel { ConditionName = model.ConditionName });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Компонент с таким названием уже есть");
            }
        }
    }
}