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

namespace ServiceStationBusinessLogic.BusinessLogic 
{
    public class WorkLogic : IWorkLogic {

		private readonly ILogger _logger;
		private readonly IWorkStorage _storage;

		public WorkLogic(ILogger<IWorkLogic> logger, IWorkStorage storage) {
			_logger = logger;
			_storage = storage;
		}

        public bool Create(WorkBindingModel model) {
            CheckModel(model);
            if (_storage.Insert(model) == null) {
                _logger.LogInformation("Insert operation failed");
                return false;
            }
            return true;
        }

        public bool Update(WorkBindingModel model) {
            CheckModel(model);
            if (_storage.Update(model) == null) {
                _logger.LogInformation("Insert operation failed");
                return false;
            }
            return true;
        }

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

        public WorkViewModel? ReadElement(WorkSearchModel model) {
            if (model == null) {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation($"ReadElement.ID:{model.Id}");
            var element = _storage.GetElement(model);
            if (element == null) {
                _logger.LogWarning("ReadElement.Element not found");
                return null;
            }
            _logger.LogInformation($"ReadElement.Find.Id:{element.Id}");
            return element;
        }

        public List<WorkViewModel>? ReadList(WorkSearchModel model) {
            _logger.LogInformation($"ReadList.ID:{model?.Id}");
            var list = model == null ? _storage.GetFullList() : _storage.GetFilteredList(model);
            if (list == null) {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation($"ReadList.Count:{list.Count}");
            return list;
        }

        private void CheckModel(WorkBindingModel model, bool withParams = true) {
            
            if (string.IsNullOrEmpty(model.Id.ToString())) {
                throw new ArgumentNullException("Нет номера работы", nameof(model.Id));
            }
            if (!withParams) {
                return;
            }
            if (string.IsNullOrEmpty(model.Date.ToString())) {
                model.Date = DateTime.Now;
            }
            if (string.IsNullOrEmpty(model.Price.ToString())) {
                throw new ArgumentNullException("Стоимость работы должна быть боль 0", nameof(model.Price));
            }
            if (string.IsNullOrEmpty(model.ExecutorId.ToString())) {
                throw new ArgumentNullException("Нет номера исполнителя", nameof(model.ExecutorId));
            }
            if (string.IsNullOrEmpty(model.TaskByWorkId.ToString())) {
                throw new ArgumentNullException("Нет номера задачи", nameof(model.TaskByWorkId));
            }
            if (model.ClientList.Count <= 0) {
                throw new ArgumentException("Работа не может быть без клиента", nameof(model.ClientList));
            }
            _logger.LogInformation($"Work.Id:{model.Id}.Date:{model.Date}.Price:{model.Price}.ExecutorId:{model.ExecutorId}.TaskId:{model.TaskByWorkId}." +
                                    $"ClientList.Count:{model.ClientList.Count}");
        }
    }
}