using Fake.Application;
using Fake.Domain.Exceptions;
using Fake.UnitOfWork;
using Microsoft.AspNetCore.Mvc;
using Oms.Application.Dtos.Orders;
using Oms.Application.Integrations.Itfx;
using Oms.Application.Shared;

namespace Oms.Application.Services.Orders;

public partial class OrderService
{
    private OrderDownstreamCredentialResolver OrderDownstreamCredentialResolver =>
        LazyServiceProvider.GetRequiredService<OrderDownstreamCredentialResolver>();

    private IItfxForwardClient ItfxForwardClient =>
        LazyServiceProvider.GetRequiredService<IItfxForwardClient>();

    /// <summary>
    /// 按订单 Id 从数据库组装 createOrderOne 请求体（预览，不调用下游）。
    /// </summary>
    [HttpGet("/order/downstream-create-one-body")]
    public async Task<OrderDownstreamCreateOneBodyOutput> GetDownstreamCreateOneBodyAsync([FromQuery] int id)
    {
        var (order, body) = await LoadDownstreamCreateOneContextAsync(id);
        var creds = await OrderDownstreamCredentialResolver.ResolveAsync(order);
        return new OrderDownstreamCreateOneBodyOutput
        {
            OrderId = order.Id,
            ServiceNo = order.ServiceNo,
            SupplierCode = creds.SupplierCode,
            Body = body
        };
    }

    /// <summary>
    /// 按订单 Id 组装 createOrderOne 并转发至 itfx 下游。
    /// </summary>
    [HttpPost("/order/downstream-forward-create-one")]
    [UnitOfWork(IsTransactional = true)]
    public async Task<OrderDownstreamForwardResult> DownstreamForwardCreateOneAsync([FromBody] OrderActionInput input)
    {
        var (order, body) = await LoadDownstreamCreateOneContextAsync(input.Id);
        if (string.IsNullOrWhiteSpace(order.ServiceNo))
        {
            throw new BusinessException("订单运单号为空，无法预报下游");
        }

        var creds = await OrderDownstreamCredentialResolver.ResolveAsync(order);
        var forward = await ItfxForwardClient.ForwardCreateOrderOneAsync(
            creds.SupplierCode,
            creds.AppKey,
            creds.AppSecret,
            body);

        if (forward.Success
            && ItfxCreateOrderOneDataParser.TryParse(forward.ResponseBody, out var data)
            && data != null)
        {
            var previousTrackNo = order.TrackNo;
            if (ItfxCreateOrderOneDataParser.ApplyToOrder(order, data))
            {
                await OrderRepository.UpdateAsync(order);
                await EnqueueSmallBagTrackUpsertWhenTrackNoChangedAsync(order, previousTrackNo);
            }

            if (!string.IsNullOrWhiteSpace(data.LabelUrl))
            {
                await OrderFileManager.AddOrReplaceDownstreamLabelAsync(
                    order.Id,
                    data.LabelUrl!,
                    CurrentUser.IsAuthenticated ? CurrentUser.GetId<int>() : 0);
            }
        }

        return new OrderDownstreamForwardResult
        {
            Success = forward.Success,
            SupplierCode = creds.SupplierCode,
            Url = forward.Url,
            RequestJson = forward.RequestJson,
            StatusCode = forward.StatusCode,
            ResponseBody = forward.ResponseBody,
            DownstreamServiceNo = order.DownstreamServiceNo,
            TrackNo = order.TrackNo,
        };
    }

    /// <summary>
    /// 按订单 Id 组装 getFile 并转发至 itfx 下游；成功时转存文件并回写单号。
    /// </summary>
    [HttpPost("/order/downstream-forward-get-file")]
    public async Task<OrderDownstreamGetFileResult> DownstreamForwardGetFileAsync(
        [FromBody] OrderDownstreamGetFileInput input)
    {
        if (!ItfxGetFileDataParser.TryResolveFileType(input.Type, out var fileType))
        {
            throw new BusinessException("不支持的文件类型，请选择下游面单/末端面单/POD");
        }

        var order = await GetOrderOrThrowAsync(input.Id);
        var creds = await OrderDownstreamCredentialResolver.ResolveAsync(order);
        var body = new ItfxGetFileBody
        {
            ClientNo = order.ClientNo?.Trim() ?? string.Empty,
            TrackNo = order.TrackNo?.Trim() ?? string.Empty,
            ServiceNo = order.DownstreamServiceNo?.Trim() ?? string.Empty,
            Type = input.Type
        };

        var forward = await ItfxForwardClient.ForwardWithSubscribeAsync(
            ItfxGetFileDataParser.StandardCode,
            creds.SupplierCode,
            creds.AppKey,
            creds.AppSecret,
            body);

        string? storedFileUrl = null;
        if (forward.Success
            && ItfxGetFileDataParser.TryParse(forward.ResponseBody, out var data)
            && data != null)
        {
            var previousTrackNo = order.TrackNo;
            if (ItfxGetFileDataParser.ApplyToOrder(order, data))
            {
                await OrderRepository.UpdateAsync(order);
                await EnqueueSmallBagTrackUpsertWhenTrackNoChangedAsync(order, previousTrackNo);
            }

            if (!string.IsNullOrWhiteSpace(data.Url))
            {
                var saved = await OrderFileManager.AddOrReplaceFromRemoteUrlAsync(
                    order.Id,
                    fileType,
                    data.Url!,
                    CurrentUser.IsAuthenticated ? CurrentUser.GetId<int>() : 0);
                storedFileUrl = saved.FileUrl;
            }
        }

        return new OrderDownstreamGetFileResult
        {
            Success = forward.Success,
            SupplierCode = creds.SupplierCode,
            Type = input.Type,
            FileType = fileType,
            Url = forward.Url,
            RequestJson = forward.RequestJson,
            StatusCode = forward.StatusCode,
            ResponseBody = forward.ResponseBody,
            StoredFileUrl = storedFileUrl,
            DownstreamServiceNo = order.DownstreamServiceNo,
            TrackNo = order.TrackNo,
        };
    }

    private async Task<(Domain.OrdersAggregate.Entities.Order order, ItfxCreateOrderOneBody body)> LoadDownstreamCreateOneContextAsync(
        int orderId)
    {
        var bundles = await OrderRepository.GetDownstreamCreateOneBundlesAsync([orderId]);
        if (!bundles.TryGetValue(orderId, out var bundle))
        {
            throw new BusinessException("订单不存在");
        }

        var body = await OrderDownstreamCreateOneBodyBuilder.BuildAsync(
            bundle.Order,
            bundle.Sender,
            bundle.Recipient,
            bundle.Declarations,
            bundle.Weights,
            CountryRepository,
            ServiceChannelRepository,
            FileStorage);

        return (bundle.Order, body);
    }
}