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

namespace DressAtelierBusinessLogic.BusinessLogic
{
    public class MaterialLogic : IMaterialLogic
    {
        private readonly ILogger _logger;

        private readonly IMaterialStorage _componentStorage;
        public MaterialLogic(ILogger<MaterialLogic> logger, IMaterialStorage componentStorage)
        {
            _logger = logger;
            _componentStorage = componentStorage;
        }

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

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

        }

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

        }

        public MaterialViewModel? ReadElement(MaterialSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }

            _logger.LogInformation("ReadElement. ComponentName:{ComponentName}.ID:{ ID}", model.ComponentName, model.ID);

            var element = _componentStorage.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<MaterialViewModel>? ReadList(MaterialSearchModel? model)
        {
            _logger.LogInformation("ReadList. ComponentName:{ComponentName}. ID:{ ID}", model?.ComponentName, model?.ID);
            
            var list = model == null ? _componentStorage.GetFullList() : _componentStorage.GetFilteredList(model);

            if (list == null)
            {
                _logger.LogWarning("ReadList return null list");
                return null;
            }
            _logger.LogInformation("ReadList. Count:{Count}", list.Count);
            return list;

        }

        private void CheckModel(MaterialBindingModel model, bool withParams = true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.ComponentName))
            {
                throw new ArgumentNullException("Invalid name of component", nameof(model.ComponentName));
            }
            if (model.Cost <= 0)
            {
                throw new ArgumentNullException("Price of component should be higher than 0", nameof(model.Cost));
            }
            _logger.LogInformation("Component. ComponentName:{ComponentName}. Cost:{ Cost}. ID: { ID} ", model.ComponentName, model.Cost, model.ID);
             
            var element = _componentStorage.GetElement(new MaterialSearchModel
            {
                 ComponentName = model.ComponentName
            });

            if (element != null && element.ID != model.ID)
            {
                throw new InvalidOperationException("Component with such name already exists.");
            }
        }

    }
}