using DatabaseImplement.Implements;
using DataContracts.bindingModels;
using DataContracts.BLs;
using DataContracts.searchModels;
using DataContracts.storages;
using DataContracts.viewModels;

namespace BusinessLogic
{
    public class ClientBL : IClientBL
    {
        private readonly ClientStorage _clientStorage;
        private readonly ProductBL productBL;
        public ClientBL()
        {
            _clientStorage = new();
            productBL = new ProductBL();
        }
        public bool Create(ClientBindingModel model)
        {
            CheckModel(model);
            if (_clientStorage.Insert(model) == null)
            {
                return false;
            }
            return true;
        }
        public List<(string title, int count)> FindDataDiagram()
        {
            List<(string, int)> list = new List<(string, int)>(); 
            List<ClientViewModel> clients = ReadList();
            List<ProductViewModel> products = productBL.ReadList();
            foreach(ProductViewModel product in products)
            {
                int count = 0;

                foreach(ClientViewModel client in clients)
                {
                    if(client.products.Contains(product.title))
                        count++;
                }
                list.Add((product.title, count));
            }
            return list;
        }
        public bool Delete(ClientBindingModel model)
        {
            CheckModel(model, false);
            if (_clientStorage.Delete(model) == null)
            {
                return false;
            }
            return true;
        }

        public ClientViewModel? ReadElement(ClientSearchModel model)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            var element = _clientStorage.GetElement(model);
            if (element == null)
            {
                return null;
            }
            return element;
        }

        public List<ClientViewModel>? ReadList()
        {
            var list = _clientStorage.GetFullList();
            if (list == null)
            {
                return null;
            }
            return list;
        }

        public bool Update(ClientBindingModel model)
        {
            CheckModel(model);
            if (_clientStorage.Update(model) == null)
            {
                return false;
            }
            return true;
        }

        private void CheckModel(ClientBindingModel model, bool withParams =
       true)
        {
            if (model == null)
            {
                throw new ArgumentNullException(nameof(model));
            }
            if (!withParams)
            {
                return;
            }
            if (string.IsNullOrEmpty(model.FIO))
            {
                throw new ArgumentNullException("Нет имени клиента", nameof(model.FIO));
            }
            if (string.IsNullOrEmpty(model.email))
            {
                throw new ArgumentNullException("Нет почты клиента", nameof(model.email));
            }
            if (string.IsNullOrEmpty(model.products))
            {
                throw new ArgumentNullException("Нет продуктов клиента", nameof(model.products));
            }
           
        }

    }
}