using GB5Shared.DTO.Framework.Login;
using Microsoft.Extensions.Logging;
using System.Net.Http.Json;

namespace GoodBooks.PAY.PAYBLL.Integration
{
    public class SalesCouponService : ISalesCouponService
    {
        private readonly IHttpClientFactory           _httpClientFactory;
        private readonly ILogger<SalesCouponService>  _logger;

        public SalesCouponService(
            IHttpClientFactory httpClientFactory,
            ILogger<SalesCouponService> logger)
        {
            _httpClientFactory = httpClientFactory;
            _logger            = logger;
        }

        public async Task<CouponValidationResult?> ValidateCouponAsync(
            string couponCode, int customerId, decimal orderAmt, LoginDTO login, CancellationToken ct)
        {
            try
            {
                var client = _httpClientFactory.CreateClient("SalesModule");
                var payload = new
                {
                    CouponCode   = couponCode,
                    CustomerId   = customerId,
                    OrderAmt     = orderAmt,
                    ClientId     = login.ClientId,
                    DatabaseName = login.DatabaseName
                };
                var response = await client
                    .PostAsJsonAsync("/Sales/Coupon/ValidateCoupon", payload, ct)
                    .ConfigureAwait(false);
                if (!response.IsSuccessStatusCode) return null;
                return await response.Content
                    .ReadFromJsonAsync<CouponValidationResult>(cancellationToken: ct)
                    .ConfigureAwait(false);
            }
            catch (Exception ex)
            {
                _logger.LogWarning(ex,
                    "ValidateCoupon failed for CouponCode {CouponCode}", couponCode);
                return null;
            }
        }

        public async Task RecordCouponUsageAsync(
            string couponCode, int customerId, int payOrderId, LoginDTO login, CancellationToken ct)
        {
            try
            {
                var client = _httpClientFactory.CreateClient("SalesModule");
                var payload = new
                {
                    CouponCode   = couponCode,
                    CustomerId   = customerId,
                    PayOrderId   = payOrderId,
                    ClientId     = login.ClientId,
                    DatabaseName = login.DatabaseName
                };
                await client
                    .PostAsJsonAsync("/Sales/Coupon/RecordCouponUsage", payload, ct)
                    .ConfigureAwait(false);
            }
            catch (Exception ex)
            {
                _logger.LogWarning(ex,
                    "RecordCouponUsage failed for CouponCode {CouponCode} PayOrder {PayOrderId}",
                    couponCode, payOrderId);
                // Non-fatal — fire-and-forget; caller does not need to handle
            }
        }
    }
}