using PlumbingRepairContracts.BindingModels;
using PlumbingRepairContracts.SearchModels;
using PlumbingRepairContracts.StoragesContracts;
using PlumbingRepairContracts.ViewModels;
using PlumbingRepairFileImplement.Models;

namespace PlumbingRepairFileImplement.Implements
{
    public class OrderStorage : IOrderStorage
    {
        private readonly DataFileSingleton source;
        public OrderStorage()
        {
            source = DataFileSingleton.GetInstance();
        }
        public OrderViewModel? Delete(OrderBindingModel model)
        {
            var element = source.Orders.FirstOrDefault(x => x.Id == model.Id);
            if (element != null)
            {
                source.Orders.Remove(element);
                source.SaveOrders();
                return GetViewModel(element);
            }
            return null;
        }

        public OrderViewModel? GetElement(OrderSearchModel model)
        {
            if (!model.Id.HasValue)
            {
                return null;
            }
            if (model.ImplementerId.HasValue && model.Status.HasValue)
                return GetViewModel(source.Orders.FirstOrDefault(x => x.ImplementerId == model.ImplementerId && x.Status == model.Status));
            if (model.Id.HasValue)
                return GetViewModel(source.Orders.FirstOrDefault(x => model.Id.HasValue && x.Id == model.Id));
            return null;
                     
        }

        public List<OrderViewModel> GetFilteredList(OrderSearchModel model)
        {
            if (!model.Id.HasValue && !model.DateFrom.HasValue || !model.DateTo.HasValue)
            {
                return new();
            }
            if (model.Id.HasValue)
                source.Orders.Where(x => x.Id == model.Id)
                 .Select(x => GetViewModel(x))
                 .ToList();
            if (model.ClientId.HasValue)
                return source.Orders.Where(x => x.ClientId == model.ClientId).Select(x => GetViewModel(x)).ToList();
            if (model.ImplementerId.HasValue && model.Status.HasValue)
                return source.Orders.Where(x => x.ImplementerId == model.ImplementerId && x.Status == model.Status).Select(x => GetViewModel(x)).ToList();
            return source.Orders.Where(x => x.DateCreate >= model.DateFrom).Where(x => x.DateCreate <= model.DateTo).
                   Select(x => GetViewModel(x)).ToList();

        }

        public List<OrderViewModel> GetFullList()
        {
            return source.Orders
                   .Select(x => GetViewModel(x))
                   .ToList();
        }

        public OrderViewModel? Insert(OrderBindingModel model)
        {
            model.Id = source.Orders.Count > 0 ? source.Orders.Max(x => x.Id) + 1 : 1;
            var newOrder = Order.Create(model);
            if (newOrder == null)
            {
                return null;
            }
            source.Orders.Add(newOrder);
            source.SaveOrders();
            return GetViewModel(newOrder);
        }

        public OrderViewModel? Update(OrderBindingModel model)
        {
            var order = source.Orders.FirstOrDefault(x => x.Id == model.Id);
            if (order == null)
            {
                return null;
            }
            order.Update(model);
            source.SaveOrders();
            return GetViewModel(order);
        }

        private OrderViewModel GetViewModel(Order order)
        {
            var viewModel = order.GetViewModel;
            var work = source.Works.FirstOrDefault(x => x.Id == order.WorkId);
            var client = source.Clients.FirstOrDefault(x => x.Id == order.ClientId);
            if (work != null)
            {
                viewModel.WorkName = work.WorkName;
            }

            return viewModel;
        }
    }
}