using Fake.Application;
using Fake.Domain.Exceptions;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Mvc;
using MiniExcelLibs;
using Oms.Application.Dtos.Orders;
using Oms.Application.Dtos.Shared;
using Oms.Application.DataPerm;
using Oms.Application.Labeling;
using Oms.Application.Shared;
using Newtonsoft.Json;
using Oms.Application.Services.Orders.Batch;
using Oms.Domain.ChannelsAggregate.Repositories;
using Oms.Domain.CustomersAggregate.Repositories;
using Oms.Domain.OrdersAggregate;
using Oms.Domain.OrdersAggregate.Consts;
using Oms.Domain.OrdersAggregate.Entities;
using Oms.Domain.OrdersAggregate.Repositories;
using Oms.Domain.SystemAggregate.Entities;
using Oms.Domain.SystemAggregate.Repositories;

namespace Oms.Application.Services.Orders;

/// <summary>
/// 订单相关 API 服务。
/// </summary>
[ApiExplorerSettings(GroupName = "OMS-Order")]
public partial class OrderService : ApplicationService
{
    private IOrderRepository OrderRepository => LazyServiceProvider.GetRequiredService<IOrderRepository>();
    private IOrderTemplateRepository OrderTemplateRepository => LazyServiceProvider.GetRequiredService<IOrderTemplateRepository>();
    private IWarehouseAddressRepository WarehouseAddressRepository => LazyServiceProvider.GetRequiredService<IWarehouseAddressRepository>();
    private ISalesProductRepository SalesProductRepository => LazyServiceProvider.GetRequiredService<ISalesProductRepository>();
    private IDictRepository DictRepository => LazyServiceProvider.GetRequiredService<IDictRepository>();
    private IWebHostEnvironment WebHostEnvironment => LazyServiceProvider.GetRequiredService<IWebHostEnvironment>();
    private LabelPdfGenerationService LabelPdfGenerationService =>
        LazyServiceProvider.GetRequiredService<LabelPdfGenerationService>();
    private OmsRbacUserDisplayNameResolver UserDisplayNameResolver =>
        LazyServiceProvider.GetRequiredService<OmsRbacUserDisplayNameResolver>();

    private EffectiveScopeBuilder DataScopeBuilder =>
        LazyServiceProvider.GetRequiredService<EffectiveScopeBuilder>();

    /// <summary>
    /// 查询订单列表。
    /// </summary>
    /// <param name="input">入参：订单分页查询条件。</param>
    /// <returns>订单分页结果，包含列表数据和总记录数。</returns>
    [HttpPost("/order/list")]
    public async Task<OmsPageResult<OrderOutput>> GetPaginatedListAsync([FromBody] OrderPaginatedInput input)
    {
        var customerId = await OmsSessionHelper.ResolveListCustomerIdAsync(
            CustomerRepository,
            CurrentUser,
            input.CustomerId);
        var filter = BuildListFilter(input, customerId);
        await ApplyInternalOrderDataScopeAsync(filter);
        var pageIndex = OmsDocHelper.NormalizePage(input.Page);
        var pageSize = OmsDocHelper.NormalizePageSize(input.PageSize);
        var (orders, total) = await OrderRepository.GetFilteredPagedListAsync(
            pageIndex,
            pageSize,
            filter);
        return new OmsPageResult<OrderOutput> { Items = await MapOrderOutputsAsync(orders), Total = total };
    }

    /// <summary>
    /// 按状态聚合统计订单数量（单次查询，供 Tab 角标展示）。
    /// </summary>
    [HttpGet("/order/status-counts")]
    public async Task<OrderStatusCountsOutput> GetStatusCountsAsync()
    {
        var filter = await BuildScopedListFilterAsync();
        var rows = await OrderRepository.GetStatusCountsByFilterAsync(filter);
        var counts = rows.ToDictionary(
            x => x.Status,
            x => x.Count,
            StringComparer.OrdinalIgnoreCase);
        var handleRows = await OrderRepository.GetHandleStatusCountsByFilterAsync(filter);
        var handleCounts = handleRows.ToDictionary(
            x => x.Key,
            x => new OrderHandleStatusCountsOutput
            {
                Pending = x.Value.Pending,
                Processed = x.Value.Processed
            },
            StringComparer.OrdinalIgnoreCase);
        return new OrderStatusCountsOutput
        {
            Total = rows.Sum(x => x.Count),
            Counts = counts,
            HandleCounts = handleCounts
        };
    }

    /// <summary>
    /// 查询订单详情。
    /// </summary>
    /// <param name="id">入参：目标主键。</param>
    /// <returns>订单详情。</returns>
    [HttpGet("/order/detail")]
    public async Task<OrderOutput> GetDetailAsync([FromQuery] int id)
    {
        var order = await GetOrderOrThrowAsync(id);
        return (await MapOrderOutputsAsync([order])).First();
    }

    /// <summary>
    /// 执行订单支付。
    /// </summary>
    /// <param name="input">入参：订单操作参数。</param>
    /// <returns>无返回体，仅完成订单支付处理。</returns>
    [HttpPost("/order/pay")]
    public async Task PayAsync(OrderActionInput input)
    {
        var order = await GetOrderOrThrowAsync(input.Id);
        if (order.IsPaid > 0)
        {
            throw new BusinessException("订单已支付");
        }

        if (order.OrderStatus is not (OrderStatusCodes.PendingPayment or OrderStatusCodes.Received))
        {
            throw new BusinessException("当前订单状态不可支付");
        }

        if (!order.CustomerId.HasValue)
        {
            throw new BusinessException("订单未关联客户，无法支付");
        }

        var fees = await OrderRepository.GetFeesByOrderIdsAsync([order.Id]);
        var payAmount = order.PayableAmount ?? fees
            .Where(x => x.Type == OrderFeeTypeCodes.Receivable)
            .Sum(x => x.Amount);
        if (payAmount <= 0)
        {
            throw new BusinessException("订单应付金额无效，无法支付");
        }

        var customer = await CustomerRepository.FirstOrDefaultAsync(x => x.Id == order.CustomerId.Value);
        if (customer == null)
        {
            throw new BusinessException("客户不存在");
        }

        var balanceMutator = LazyServiceProvider.GetRequiredService<CustomerBalanceMutator>();
        await balanceMutator.DebitOrderPayAsync(
            customer,
            payAmount,
            order.Id,
            order.ServiceNo,
            $"订单支付 {order.ServiceNo}");

        if (order.CouponInstanceId.HasValue)
        {
            var couponManager = LazyServiceProvider.GetRequiredService<MarketingCouponManager>();
            var mainCustomerId = await couponManager.ResolveMainCustomerIdAsync(customer.Id);
            await couponManager.MarkUsedAsync(order.CouponInstanceId.Value, mainCustomerId, order.Id);
        }

        var mainCustomer = await MarketingCustomerHelper.ResolveMarketingMainCustomerAsync(CustomerRepository, customer);
        var pointsManager = LazyServiceProvider.GetRequiredService<MarketingPointsManager>();
        await pointsManager.EarnOnOrderPaidAsync(mainCustomer.Id, order.Id, payAmount);

        order.PayTime = DateTime.Now;
        order.IsPaid = 1;
        order.OrderStatus = OrderStatusCodes.PendingShip;
        await UpdateOrderAsync(order);
    }

    /// <summary>
    /// 标记订单派送成功（触发引荐分成 Pending）。
    /// </summary>
    [HttpPost("/order/mark-delivery-success")]
    public async Task MarkDeliverySuccessAsync(OrderActionInput input)
    {
        var order = await GetOrderOrThrowAsync(input.Id);
        order.OrderStatus = OrderStatusCodes.DeliverySuccess;
        order.SignTime = DateTime.Now;
        await UpdateOrderAsync(order);

        var commissionManager = LazyServiceProvider.GetRequiredService<ReferralCommissionManager>();
        await commissionManager.OnOrderDeliverySuccessAsync(order.Id);
    }

    /// <summary>
    /// 执行订单预报。
    /// </summary>
    /// <param name="input">入参：订单操作参数。</param>
    /// <returns>无返回体，仅完成订单预报处理。</returns>
    [HttpPost("/order/pre-declare")]
    public async Task PreDeclareAsync(OrderActionInput input)
    {
        var order = await GetOrderOrThrowAsync(input.Id);
        order.OrderStatus = OrderStatusCodes.Predeclared;
        await UpdateOrderAsync(order);
    }

    /// <summary>
    /// 执行订单拦截。
    /// </summary>
    /// <param name="input">入参：订单操作参数。</param>
    /// <returns>无返回体，仅完成订单拦截处理。</returns>
    [HttpPost("/order/intercept")]
    public async Task InterceptAsync(OrderActionInput input)
    {
        var order = await GetOrderOrThrowAsync(input.Id);
        order.IsIntercept = 1;
        await UpdateOrderAsync(order);
    }

    /// <summary>
    /// 取消订单拦截。
    /// </summary>
    /// <param name="input">入参：订单操作参数。</param>
    /// <returns>无返回体，仅完成取消订单拦截。</returns>
    [HttpPost("/order/cancel-intercept")]
    public async Task CancelInterceptAsync(OrderActionInput input)
    {
        var order = await GetOrderOrThrowAsync(input.Id);
        order.IsIntercept = 0;
        await UpdateOrderAsync(order);
    }

    /// <summary>
    /// 删除订单。
    /// </summary>
    /// <param name="input">入参：订单操作参数。</param>
    /// <returns>无返回体，仅完成删除订单。</returns>
    [HttpPost("/order/delete")]
    public async Task DeleteAsync(OrderActionInput input)
    {
        var order = await GetOrderOrThrowAsync(input.Id);
        if (order.OrderStatus is not (OrderStatusCodes.Draft or OrderStatusCodes.Predeclared))
        {
            throw new BusinessException("仅草稿或已预报订单可删除");
        }

        order.OrderStatus = OrderStatusCodes.Deleted;
        await OrderRepository.UpdateAsync(order);
        await OrderRepository.DeleteAsync(order);
    }

    /// <summary>
    /// 打印订单。
    /// </summary>
    /// <param name="input">入参：订单操作参数。</param>
    /// <returns>订单打印结果。</returns>
    [HttpPost("/order/print")]
    public async Task<OrderPrintOutput> PrintAsync(OrderActionInput input)
    {
        var order = await GetOrderOrThrowAsync(input.Id);
        var mapped = (await MapOrderOutputsAsync([order])).First();

        var existingUrl = await OrderFileManager.GetSystemLabelUrlAsync(order.Id);
        if (!string.IsNullOrWhiteSpace(existingUrl))
        {
            return new OrderPrintOutput
            {
                PrintUrl = existingUrl!,
                LabelGenerateStatus = LabelGenerateStatusCodes.Ready
            };
        }

        // 无系统面单：即时补生成（打印场景优先出 PDF）
        var result = await LabelPdfGenerationService.GenerateAndPersistAsync(
            order,
            mapped,
            templateIdOverride: null,
            operatorName: CurrentUser.UserName,
            operatorUserId: CurrentUser.IsAuthenticated ? CurrentUser.GetId<int>() : 0);

        if (!result.Success || string.IsNullOrWhiteSpace(result.LabelUrl))
        {
            // 兼容回落：仍无模板时给 HTML stub，避免彻底不可打
            var fallbackUrl = await CreateOrderPrintFileAsync(mapped);
            return new OrderPrintOutput
            {
                PrintUrl = fallbackUrl,
                LabelGenerateStatus = result.Status,
                LabelGenerateError = result.Error ?? "面单 PDF 未就绪，已回落 HTML"
            };
        }

        return new OrderPrintOutput
        {
            PrintUrl = result.LabelUrl!,
            LabelGenerateStatus = result.Status,
            LabelGenerateError = result.Error
        };
    }

    /// <summary>
    /// 导出订单。
    /// </summary>
    /// <param name="input">入参：订单导出筛选条件。</param>
    /// <returns>订单导出结果。</returns>
    [HttpPost("/order/export")]
    public async Task<OrderExportOutput> ExportAsync([FromBody] OrderExportInput input)
    {
        await CleanupExpiredFilesAsync(GetOrderExportDirectory());
        var customerId = await OmsSessionHelper.ResolveListCustomerIdAsync(
            CustomerRepository,
            CurrentUser,
            null);
        var filter = BuildListFilter(input, customerId);
        await ApplyInternalOrderDataScopeAsync(filter);
        var orders = await OrderRepository.GetFilteredListAsync(filter);
        var fileName = $"orders-{DateTime.Now:yyyyMMddHHmmss}.xlsx";
        var directory = GetOrderExportDirectory();
        Directory.CreateDirectory(directory);
        await MiniExcel.SaveAsAsync(Path.Combine(directory, fileName), await BuildOrderExportRowsAsync(orders));
        return new OrderExportOutput
        {
            DownloadUrl = $"/uploads/exports/orders/{fileName}",
            ExpireAt = DateTime.Now.AddHours(24)
        };
    }

    /// <summary>
    /// 查价运输方式选项（按销售产品分组）。
    /// </summary>
    [HttpGet("/order/price-check/shipping-options")]
    public Task<OrderPriceCheckShippingOptionsOutput> GetPriceCheckShippingOptionsAsync() =>
        BuildPriceCheckShippingOptionsAsync();

    /// <summary>
    /// 执行订单运费试算。
    /// </summary>
    /// <param name="input">入参：订单运费试算参数。</param>
    /// <returns>订单运费试算列表结果。</returns>
    [HttpPost("/order/price-check")]
    public async Task<OrderPriceCheckResultOutput> PriceCheckAsync(OrderPriceCheckInput input)
    {
        if (!input.CustomerId.HasValue || input.CustomerId.Value <= 0)
        {
            input.CustomerId = await ResolvePriceCheckCustomerIdAsync();
        }

        return await BuildPriceCheckResultAsync(input);
    }

    /// <summary>
    /// 查询订单模板列表。
    /// </summary>
    /// <param name="input">入参：订单模板列表查询条件。</param>
    /// <returns>订单模板分页结果，包含列表数据和总记录数。</returns>
    [HttpGet("/order/template/list")]
    public async Task<OmsPageResult<OrderTemplateOutput>> GetTemplateListAsync([FromQuery] OrderTemplateListInput input)
    {
        var items = await GetTemplateOutputsAsync(input);
        return items;
    }

    /// <summary>
    /// 下载订单模板文件。
    /// </summary>
    /// <param name="templateId">入参：模板主键。</param>
    /// <returns>文件流响应。</returns>
    [HttpGet("/order/template/download")]
    public async Task<FileContentResult> DownloadTemplateAsync([FromQuery] int templateId)
    {
        return await BuildTemplateDownloadAsync(templateId);
    }

    /// <summary>
    /// 导入订单文件，创建 import-row 批量任务并返回 jobId。
    /// </summary>
    /// <param name="input">入参：订单导入参数。</param>
    /// <returns>批量任务 ID 及是否异步处理。</returns>
    [HttpPost("/order/upload")]
    public async Task<OrderUploadOutput> UploadAsync([FromForm] OrderUploadInput input)
    {
        return await ImportOrdersAsync(input);
    }

    /// <summary>
    /// 创建订单包裹。
    /// </summary>
    /// <param name="input">入参：订单包裹创建参数。</param>
    /// <returns>订单包裹创建结果。</returns>
    [HttpPost("/order/parcel/create")]
    public async Task<OrderParcelCreateOutput> CreateParcelAsync(OrderParcelCreateInput input)
    {
        return await CreateParcelCoreAsync(input);
    }

    /// <summary>
    /// 批量创建订单包裹。
    /// </summary>
    /// <param name="input">入参：批量创建小包请求集合，每条记录沿用单票创建结构。</param>
    /// <returns>批量处理结果，包含批次号、成功失败数量与逐条执行明细。</returns>
    [HttpPost("/order/parcel/batch-create")]
    public async Task<OrderParcelBatchCreateOutput> BatchCreateParcelAsync(OrderParcelBatchCreateInput input)
    {
        if (input == null || input.Count == 0)
        {
            throw new BusinessException("批量创建请求不能为空");
        }

        if (input.Count > ParcelBatchMaxCount)
        {
            throw new BusinessException($"单次批量创建不能超过{ParcelBatchMaxCount}条");
        }

        if (BatchJobPublisher.IsEnabled)
        {
            return await BatchCreateParcelViaQueueAsync(input);
        }

        return await BatchCreateParcelSyncAsync(input);
    }

    private async Task<OrderParcelBatchCreateOutput> BatchCreateParcelViaQueueAsync(OrderParcelBatchCreateInput input)
    {
        var batchNo = $"PCB{DateTime.Now:yyyyMMddHHmmssfff}";
        var operatorUserId = CurrentUser.GetId<int>();
        var payloadItems = input.Select((request, index) => new OrderBatchPayloadItemInput
        {
            OrderId = 0,
            ServiceNo = request.ServiceNo,
            ClientNo = request.ClientNo,
            ItemKey = !string.IsNullOrWhiteSpace(request.RequestId)
                ? $"parcel:{request.RequestId}"
                : $"parcel:{batchNo}:{index + 1}",
            PayloadJson = JsonConvert.SerializeObject(request),
        }).ToList();

        var job = await BatchJobCoordinator.CreatePayloadJobAsync(
            new OrderBatchPayloadJobCreateInput
            {
                Action = OrderBatchActionCodes.ParcelCreate,
                RequestId = batchNo,
                Items = payloadItems,
            },
            operatorUserId);

        return new OrderParcelBatchCreateOutput
        {
            BatchNo = batchNo,
            JobId = job.JobId,
            Async = true,
            Total = input.Count,
            SuccessCount = 0,
            FailCount = 0,
            Items = [],
        };
    }

    private async Task<OrderParcelBatchCreateOutput> BatchCreateParcelSyncAsync(OrderParcelBatchCreateInput input)
    {
        var batchNo = $"PCB{DateTime.Now:yyyyMMddHHmmssfff}";
        var items = new List<OrderParcelBatchCreateItemOutput>(input.Count);
        var successCount = 0;

        for (var index = 0; index < input.Count; index++)
        {
            var request = input[index];
            try
            {
                var output = await CreateParcelCoreAsync(request);
                successCount++;
                items.Add(new OrderParcelBatchCreateItemOutput
                {
                    Index = index + 1,
                    RequestId = request.RequestId,
                    ClientNo = output.ClientNo ?? request.ClientNo,
                    ServiceNo = output.ServiceNo ?? request.ServiceNo,
                    TrackNo = output.TrackNo ?? request.TrackNo,
                    LabelUrl = output.LabelUrl,
                    Success = true,
                    Message = "success"
                });
            }
            catch (Exception ex)
            {
                items.Add(new OrderParcelBatchCreateItemOutput
                {
                    Index = index + 1,
                    RequestId = request.RequestId,
                    ClientNo = request.ClientNo,
                    ServiceNo = request.ServiceNo,
                    TrackNo = request.TrackNo,
                    Success = false,
                    Message = ex.Message
                });
            }
        }

        return new OrderParcelBatchCreateOutput
        {
            BatchNo = batchNo,
            SuccessCount = successCount,
            FailCount = items.Count - successCount,
            Items = items
        };
    }

    private static OrderListFilter BuildListFilter(OrderPaginatedInput input, int? customerId) =>
        new()
        {
            Status = input.Status,
            HandleStatus = input.HandleStatus,
            OrderSource = input.OrderSource,
            Keyword = input.Keyword,
            CreateTimeStart = input.CreateTimeStart,
            CreateTimeEnd = input.CreateTimeEnd,
            CustomerId = customerId
        };

    private static OrderListFilter BuildListFilter(OrderExportInput input, int? customerId) =>
        new()
        {
            Status = input.Status,
            OrderSource = input.OrderSource,
            Keyword = input.Keyword,
            CreateTimeStart = input.CreateTimeStart,
            CreateTimeEnd = input.CreateTimeEnd,
            CustomerId = customerId
        };

    private async Task EnsureCustomerCanAccessOrderAsync(Order order)
    {
        var customerId = await OmsSessionHelper.ResolveListCustomerIdAsync(
            CustomerRepository,
            CurrentUser,
            null);
        if (!customerId.HasValue)
        {
            return;
        }

        if (order.CustomerId == customerId.Value)
        {
            return;
        }

        // 兼容历史脏数据：下单人是当前客户账号，但订单 CustomerId 未写对
        var mapId = OmsSessionHelper.TryGetCustomerMapId(CurrentUser);
        if (mapId is > 0 && order.CreateUserId == mapId.Value)
        {
            return;
        }

        throw new BusinessException("订单不存在");
    }

    private async Task<Order> GetOrderOrThrowAsync(int id)
    {
        var entity = await OrderRepository.FirstOrDefaultAsync(x => x.Id == id);
        if (entity == null)
        {
            throw new BusinessException("订单不存在");
        }

        await EnsureCustomerCanAccessOrderAsync(entity);
        return entity;
    }

    private async Task UpdateOrderAsync(Order entity)
    {
        await OrderRepository.UpdateAsync(entity);
    }
}