using Microsoft.AspNetCore.Http;
using Microsoft.Extensions.Logging;
using Oms.Domain.ChannelsAggregate.Repositories;
using Oms.Domain.OrdersAggregate.Consts;
using Oms.Domain.OrdersAggregate.Entities;
using Oms.Domain.OrdersAggregate.Repositories;

namespace Oms.Application.Integrations.SmallBagTrack;

/// <summary>
/// 揽收大包轨迹同步结果（UpsertBigBag → Link → Track A0201）。
/// </summary>
public class PickupBigBagTrackSyncResult
{
    public string PickupNo { get; set; } = string.Empty;

    public bool Success { get; set; }

    public string? FailStep { get; set; }

    public string? Message { get; set; }

    public SmallBagTrackUpsertResult? UpsertBigBag { get; set; }

    public SmallBagTrackUpsertResult? Link { get; set; }

    public SmallBagTrackUpsertResult? TrackUpsert { get; set; }
}

/// <summary>
/// 揽收单预报下游成功后 / 手动：按序 UpsertBigBag → Link → Track/Upsert(A0201)。
/// </summary>
public interface IPickupBigBagTrackSyncer
{
    Task SyncAfterDownstreamForwardAsync(PickupOrder pickup, CancellationToken cancellationToken = default);

    /// <summary>
    /// 同步执行三步并返回逐步请求/响应（手动「创建轨迹订单」联调）。
    /// </summary>
    Task<PickupBigBagTrackSyncResult> SyncDebugAsync(PickupOrder pickup, CancellationToken cancellationToken = default);
}

internal sealed class PickupBigBagTrackSyncer(
    ISmallBagTrackOrderClient trackClient,
    IPickupOrderLineRepository pickupOrderLineRepository,
    ISalesProductRepository salesProductRepository,
    IServiceChannelRepository serviceChannelRepository,
    IHttpContextAccessor httpContextAccessor,
    ILogger<PickupBigBagTrackSyncer> logger) : IPickupBigBagTrackSyncer
{
    public async Task SyncAfterDownstreamForwardAsync(
        PickupOrder pickup,
        CancellationToken cancellationToken = default)
    {
        await SyncDebugAsync(pickup, cancellationToken);
    }

    public async Task<PickupBigBagTrackSyncResult> SyncDebugAsync(
        PickupOrder pickup,
        CancellationToken cancellationToken = default)
    {
        var result = new PickupBigBagTrackSyncResult
        {
            PickupNo = pickup?.PickupNo?.Trim() ?? string.Empty
        };

        if (pickup == null || string.IsNullOrWhiteSpace(pickup.PickupNo))
        {
            result.Success = false;
            result.FailStep = "validate";
            result.Message = "pickup or PickupNo empty";
            logger.LogWarning("Skip big-bag track sync: pickup or PickupNo empty");
            return result;
        }

        var bagNo = pickup.PickupNo.Trim();
        result.PickupNo = bagNo;
        var authorization = httpContextAccessor.HttpContext?.Request.Headers.Authorization.ToString();
        if (string.IsNullOrWhiteSpace(authorization))
        {
            authorization = null;
        }

        try
        {
            var (channel, product) = await ResolveChannelProductAsync(pickup.CarrierService, cancellationToken);
            var country = ResolveCountry(pickup);

            // 1) UpsertBigBag：client 取 product（销售产品编码）
            var upsertResult = await trackClient.UpsertBigBagAsync(
                new SmallBagTrackUpsertBigBagRequest
                {
                    Client = product ?? string.Empty,
                    BagNo = bagNo,
                    OtherNo = pickup.CarrierWaybillNo,
                    Channel = channel,
                    Product = product,
                    Country = country,
                    Authorization = authorization
                },
                cancellationToken);
            result.UpsertBigBag = upsertResult;

            if (upsertResult.Skipped)
            {
                result.Success = false;
                result.FailStep = "UpsertBigBag";
                result.Message = upsertResult.SkipReason ?? "skipped";
                logger.LogDebug(
                    "UpsertBigBag skipped for pickup {PickupNo}: {Reason}",
                    bagNo,
                    upsertResult.SkipReason);
                return result;
            }

            if (!upsertResult.Success)
            {
                result.Success = false;
                result.FailStep = "UpsertBigBag";
                result.Message = $"HTTP {upsertResult.StatusCode}";
                logger.LogWarning(
                    "Stop big-bag track sync after UpsertBigBag failure for pickup {PickupNo}",
                    bagNo);
                return result;
            }

            // 2) Link（无明细单号则跳过，继续写轨迹）
            var lines = await pickupOrderLineRepository.GetByPickupOrderIdAsync(pickup.Id, cancellationToken);
            var serviceNos = lines
                .Select(x => x.ServiceNo)
                .Where(x => !string.IsNullOrWhiteSpace(x))
                .Select(x => x!.Trim())
                .Distinct(StringComparer.OrdinalIgnoreCase)
                .ToList();

            if (serviceNos.Count > 0)
            {
                var linkResult = await trackClient.LinkOrdersAsync(
                    bagNo,
                    SmallBagTrackLifecycleEvents.BigBagOrderType,
                    serviceNos,
                    SmallBagTrackLifecycleEvents.OrderType,
                    authorization,
                    cancellationToken);
                result.Link = linkResult;

                if (linkResult.Skipped)
                {
                    logger.LogDebug(
                        "Link skipped for pickup {PickupNo}: {Reason}",
                        bagNo,
                        linkResult.SkipReason);
                }
                else if (!linkResult.Success)
                {
                    result.Success = false;
                    result.FailStep = "Link";
                    result.Message = $"HTTP {linkResult.StatusCode}";
                    logger.LogWarning(
                        "Stop big-bag track sync after Link failure for pickup {PickupNo}",
                        bagNo);
                    return result;
                }
            }
            else
            {
                logger.LogDebug("Skip Link for pickup {PickupNo}: no bound ServiceNo", bagNo);
            }

            // 3) Track Upsert A0201
            var trackResult = await trackClient.AppendLifecycleTrackResultAsync(
                bagNo,
                SmallBagTrackLifecycleEvents.PickupCreateTrackCode,
                SmallBagTrackLifecycleEvents.BigBagOrderType,
                authorization,
                cancellationToken);
            result.TrackUpsert = trackResult;

            if (trackResult.Skipped)
            {
                result.Success = false;
                result.FailStep = "TrackUpsert";
                result.Message = trackResult.SkipReason ?? "skipped";
                logger.LogDebug(
                    "Track A0201 skipped for pickup {PickupNo}: {Reason}",
                    bagNo,
                    trackResult.SkipReason);
                return result;
            }

            if (!trackResult.Success)
            {
                result.Success = false;
                result.FailStep = "TrackUpsert";
                result.Message = $"HTTP {trackResult.StatusCode}";
                logger.LogWarning(
                    "Track A0201 failed for pickup {PickupNo}: {StatusCode} {Body}",
                    bagNo,
                    trackResult.StatusCode,
                    trackResult.ResponseBody);
                return result;
            }

            result.Success = true;
            result.Message = "ok";
            return result;
        }
        catch (Exception ex)
        {
            result.Success = false;
            result.FailStep ??= "exception";
            result.Message = ex.Message;
            logger.LogWarning(ex, "Big-bag track sync failed for pickup {PickupNo}", bagNo);
            return result;
        }
    }

    private async Task<(string? Channel, string? Product)> ResolveChannelProductAsync(
        string? carrierService,
        CancellationToken cancellationToken)
    {
        var salesProductCode = carrierService?.Trim();
        if (string.IsNullOrWhiteSpace(salesProductCode))
        {
            return (null, null);
        }

        var product = await salesProductRepository.GetByProductCodeAsync(salesProductCode, cancellationToken);
        if (product == null)
        {
            return (null, salesProductCode);
        }

        var providers = await salesProductRepository.GetAllocationProvidersAsync(product.Id, cancellationToken);
        var channelId = providers
            .Where(x => x.ServiceChannelId is > 0)
            .OrderBy(x => x.SerialNumber)
            .Select(x => x.ServiceChannelId!.Value)
            .FirstOrDefault();
        if (channelId <= 0)
        {
            return (null, product.ProductCode);
        }

        var channel = await serviceChannelRepository.FirstOrDefaultAsync(x => x.Id == channelId, cancellationToken);
        var channelCode = channel?.ChannelCode?.Trim();
        return (
            string.IsNullOrWhiteSpace(channelCode) ? null : channelCode,
            product.ProductCode);
    }

    private static string ResolveCountry(PickupOrder pickup)
    {
        var isReverse = string.Equals(
            PickupDirectionCodes.NormalizeOrDefault(pickup.Direction),
            PickupDirectionCodes.Reverse,
            StringComparison.OrdinalIgnoreCase);

        if (isReverse)
        {
            return string.IsNullOrWhiteSpace(pickup.SenderCountryCode)
                ? "CN"
                : pickup.SenderCountryCode.Trim().ToUpperInvariant();
        }

        // 正向：目的仓，仓库无国别字段，默认 CN
        return "CN";
    }
}