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

namespace BarberShopBusinessLogic
{
    public class ServiceLogic : IServiceLogic
    {
        public readonly ILogger _logger;
        public readonly IServiceStorage _serviceStorage;

        public ServiceLogic(ILogger<ServiceLogic> logger, IServiceStorage serviceStorage)
        {
            _logger = logger;
            _serviceStorage = serviceStorage;
        }

        public List<ServiceViewModel>? ReadList(ServiceSearchModel? model)
        {
            _logger.LogInformation("ReadList. ServiceName:{ServiceName}.Id:{ Id}", model?.ServiceName, model?.Id);
            var list = model == null ? _serviceStorage.GetFullList() : _serviceStorage.GetFilteredList(model);
            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;
        }

        public ServiceViewModel? ReadElement(ServiceSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            _logger.LogInformation("ReadElement. ServiceName:{ServiceName}.Id:{ Id}", model.ServiceName, model.Id);
            var element = _serviceStorage.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(ServiceBindingModel model)
        {
            CheckModel(model);
            if (_serviceStorage.Insert(model) == null)
            {
                _logger.LogWarning("Insert operation failed");
                return false;
            }
            return true;
        }

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

        public bool Update(ServiceBindingModel model)
        {
            CheckModel(model);
            if (_serviceStorage.Update(model) == null)
            {
                _logger.LogWarning("Update operation failed");
                return false;
            }
            return true;
        }

        private void CheckModel(ServiceBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.ServiceName))
            {
                throw new ArgumentNullException("Нет названия услуги",
               nameof(model.ServiceName));
            }
            if (model.ServicePrice <= 0)
            {
                throw new ArgumentNullException("Цена должна быть больше 0", nameof(model.ServicePrice));
            }
            if (model.ServiceTime <= 0)
            {
                throw new ArgumentNullException("Время должно быть больше 0", nameof(model.ServiceTime));
            }
            _logger.LogInformation("Service. ServiceName:{ServiceName}.ServicePhone:{ ServicePhone}.ServiceTime:{ ServiceTime}. Id: { Id}", model.ServiceName, model.ServicePrice, model.ServiceTime, model.Id);
            var element = _serviceStorage.GetElement(new ServiceSearchModel
            {
                ServiceName = model.ServiceName
            });
            if (element != null && element.Id != model.Id)
            {
                throw new InvalidOperationException("Услуга с таким названием уже есть");
            }
        }
    }
}