using ConstructionCompanyContracts.BindingModels;
using ConstructionCompanyContracts.SearchModels;
using ConstructionCompanyContracts.StorageContracts;
using ConstructionCompanyContracts.ViewModels;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConstructionCompanyBusinessLogic.BusinessLogics
{
    public class PositionLogic
    {
        private readonly ILogger _logger;
        private readonly IPositionStorage _positionStorage;

        public PositionLogic(ILogger<PositionLogic> logger, IPositionStorage positionStorage)
        {
            _logger = logger;
            _positionStorage = positionStorage;
        }

        public List<PositionViewModel>? ReadList(PositionSearchModel? model)
        {
            _logger.LogInformation("ReadList. PositionName:{PositionName}. Id:{Id}", model?.PositionName, model?.Id);
            var list = model == null ? _positionStorage.GetFullList() : _positionStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }

        public PositionViewModel? ReadElement(PositionSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. PositionName:{PositionName}. Id:{Id}", model.PositionName, model.Id);
            var element = _positionStorage.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(PositionBindingModel model)
        {
            CheckModel(model);
            if (_positionStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

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

        private void CheckModel(PositionBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.PositionName))
            {
                throw new ArgumentNullException("Нет названия материала", nameof(model.PositionName));
            }
            if (model.Salary < 0)
            {
                throw new ArgumentNullException("Зарплата должна быть не меньше 0", nameof(model.Salary));
            }
            _logger.LogInformation("Position. PositionName:{PositionName}. Salary:{Salary}. Id:{Id}", model.PositionName, model.Salary, model.Id);
            var element = _positionStorage.GetElement(new PositionSearchModel
            {
                PositionName = model.PositionName
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Должность с таким названием уже есть");
            }
        }
    }
}