using Grpc.Core;
using Microsoft.AspNetCore.Authorization;
using Microsoft.eShopOnContainers.Services.Basket.API.Model;
using Microsoft.Extensions.Logging;
using System.Linq;
using System.Threading.Tasks;
using GrpcBasket;

namespace GrpcBasket
{
    public class BasketService : Basket.BasketBase
    {
        private readonly IBasketRepository _repository;
        private readonly ILogger<BasketService> _logger;

        public BasketService(IBasketRepository repository, ILogger<BasketService> logger)
        {
            _repository = repository;
            _logger = logger;
        }

        [AllowAnonymous]
        public override Task<CustomerBasketResponse> GetBasketById(BasketRequest request, ServerCallContext context)
        {
            _logger.LogInformation($"Begin grpc call from method {context.Method} for basket id {request.Id}");

            //context.ResponseTrailers.Add("grpc-status", "0");
            //context.Status = Status.DefaultSuccess;

            return Task.FromResult(new CustomerBasketResponse
            {
                Buyerid = "55"
            });


            //    if (!context.Response.SupportsTrailers())
            //    {
            //        var headers = new HeaderDictionary();
            //        headers.Add("grpc-status", "0");

            //        Log.Logger.Information("Custom middleware headers {@headers}", headers);
            //        context.Features.Set<IHttpResponseTrailersFeature>(new TestHttpResponseTrailersFeature
            //        {
            //            Trailers = headers
            //        });
            //    }

            //    return next();
            // var data = await _repository.GetBasketAsync(request.Id);

            // if (data != null)
            // {
            //     context.Status = new Status(StatusCode.OK, $"Basket with id {request.Id} do exist");

            //     return MapToCustomerBasketResponse(data);
            // }
            // else
            // {
            //     context.Status = new Status(StatusCode.NotFound, $"Basket with id {request.Id} do not exist");
            // }

            // return new CustomerBasketResponse();
        }

        public override async Task<CustomerBasketResponse> UpdateBasket(CustomerBasketRequest request, ServerCallContext context)
        {
            _logger.LogInformation($"Begin grpc call BasketService.UpdateBasketAsync for buyer id {request.Buyerid}");

            var customerBasket = MapToCustomerBasket(request);

            var response = await _repository.UpdateBasketAsync(customerBasket);

            if (response != null)
            {
                return MapToCustomerBasketResponse(response);
            }

            context.Status = new Status(StatusCode.NotFound, $"Basket with buyer id {request.Buyerid} do not exist");

            return null;
        }

        private CustomerBasketResponse MapToCustomerBasketResponse(CustomerBasket customerBasket)
        {
            var response = new CustomerBasketResponse
            {
                Buyerid = customerBasket.BuyerId
            };

            // customerBasket.Items.ForEach(item => response.Items.Add(new BasketItemResponse
            // {
            //     Id = item.Id,
            //     Oldunitprice = (double)item.OldUnitPrice,
            //     Pictureurl = item.PictureUrl,
            //     Productid = item.ProductId,
            //     Productname = item.ProductName,
            //     Quantity = item.Quantity,
            //     Unitprice = (double)item.UnitPrice
            // }));

            return response;
        }

        private CustomerBasket MapToCustomerBasket(CustomerBasketRequest customerBasketRequest)
        {
            var response = new CustomerBasket
            {
                BuyerId = customerBasketRequest.Buyerid
            };

            // customerBasketRequest.Items.ToList().ForEach(item => response.Items.Add(new BasketItem
            // {
            //     Id = item.Id,
            //     OldUnitPrice = (decimal)item.Oldunitprice,
            //     PictureUrl = item.Pictureurl,
            //     ProductId = item.Productid,
            //     ProductName = item.Productname,
            //     Quantity = item.Quantity,
            //     UnitPrice = (decimal)item.Unitprice
            // }));

            return response;
        }
    }
}