using Fake.DependencyInjection;
using Oms.Domain.CustomersAggregate.Entities;
using Oms.Domain.CustomersAggregate.Repositories;
using Oms.Domain.OrdersAggregate.Consts;
using Oms.Domain.OrdersAggregate.Entities;
using Oms.Domain.OrdersAggregate.Repositories;

namespace Oms.Application.Services.Orders;

/// <summary>
/// 运单创建时按 ExportCustomsMode=9610Summary 写入/刷新 t_9610_order。
/// </summary>
public class Customs9610OrderWriter : IScopedDependency
{
    private readonly ICustoms9610OrderRepository _headerRepository;
    private readonly ICustoms9610OrderItemRepository _itemRepository;
    private readonly IOrderRepository _orderRepository;
    private readonly ICustomerExportQualificationRepository _exportQualificationRepository;

    public Customs9610OrderWriter(
        ICustoms9610OrderRepository headerRepository,
        ICustoms9610OrderItemRepository itemRepository,
        IOrderRepository orderRepository,
        ICustomerExportQualificationRepository exportQualificationRepository)
    {
        _headerRepository = headerRepository;
        _itemRepository = itemRepository;
        _orderRepository = orderRepository;
        _exportQualificationRepository = exportQualificationRepository;
    }

    public async Task UpsertFromOrderAsync(
        Order order,
        string? platformCode = null,
        CancellationToken cancellationToken = default)
    {
        if (order.Id <= 0)
        {
            return;
        }

        var isSummary = string.Equals(
            order.ExportCustomsMode,
            ExportCustomsModeCodes.Mode9610Summary,
            StringComparison.OrdinalIgnoreCase);

        var existing = await _headerRepository.GetByOrderIdAsync(order.Id, cancellationToken);

        if (!isSummary)
        {
            if (existing != null
                && string.Equals(existing.Status, Customs9610StatusCodes.Pending, StringComparison.OrdinalIgnoreCase))
            {
                await _headerRepository.HardDeleteItemsByHeaderIdAsync(existing.Id, cancellationToken);
                await _headerRepository.HardDeleteAsync(existing, cancellationToken);
            }

            return;
        }

        var declarations = await _orderRepository.GetDeclarationsByOrderIdsAsync([order.Id], cancellationToken);
        var weights = await _orderRepository.GetWeightsByOrderIdsAsync([order.Id], cancellationToken);
        var grossWeight = ResolveGrossWeight(weights);
        var serviceNo = order.ServiceNo?.Trim() ?? string.Empty;
        var clientNo = FirstNonEmpty(order.ClientNo, order.ServiceNo) ?? string.Empty;
        var qualification = await ResolveQualificationAsync(order, cancellationToken);

        if (existing != null
            && string.Equals(existing.Status, Customs9610StatusCodes.Declared, StringComparison.OrdinalIgnoreCase))
        {
            // 已申报：仅同步冗余检索字段，不覆盖申报内容
            existing.ServiceNo = string.IsNullOrWhiteSpace(existing.ServiceNo) ? serviceNo : existing.ServiceNo;
            existing.UpdateTime = DateTime.Now;
            await _headerRepository.UpdateAsync(existing);
            return;
        }

        Customs9610Order header;
        if (existing == null)
        {
            header = new Customs9610Order
            {
                OrderId = order.Id,
                CustomerId = order.CustomerId ?? 0,
                Status = Customs9610StatusCodes.Pending,
                BusinessType = Customs9610FormTypeCodes.SummaryB,
                PreRecordFlag = "1",
                IsSummarySimple = 0,
                CreateTime = DateTime.Now,
            };
        }
        else
        {
            header = existing;
            header.IsDeleted = false;
        }

        header.ServiceNo = serviceNo;
        header.CustomerId = order.CustomerId ?? header.CustomerId;
        header.ClientNo = clientNo;
        header.BusinessType = string.IsNullOrWhiteSpace(header.BusinessType)
            ? Customs9610FormTypeCodes.SummaryB
            : header.BusinessType;
        if (string.IsNullOrWhiteSpace(header.PreRecordFlag)
            && string.Equals(header.BusinessType, Customs9610FormTypeCodes.SummaryB, StringComparison.OrdinalIgnoreCase))
        {
            header.PreRecordFlag = "1";
        }

        ApplyQualification(header, qualification);

        // 下单传入的电商平台优先；刷新时若未传则保留已有值
        var normalizedPlatform = Truncate(FirstNonEmpty(platformCode, header.PlatformCode), 16);
        if (!string.IsNullOrWhiteSpace(normalizedPlatform))
        {
            header.PlatformCode = normalizedPlatform;
        }

        header.GrossWeight = grossWeight;
        header.Currency = FirstNonEmpty(order.DeclaredCurrency, header.Currency, "CNY")!;
        header.DestCountry = FirstNonEmpty(order.ConsigneeCountry, header.DestCountry) ?? string.Empty;
        header.UpdateTime = DateTime.Now;

        if (existing == null)
        {
            header = await _headerRepository.InsertAsync(header);
        }
        else
        {
            await _headerRepository.UpdateAsync(header);
        }

        await _headerRepository.HardDeleteItemsByHeaderIdAsync(header.Id, cancellationToken);

        var sort = 0;
        foreach (var d in declarations.OrderBy(x => x.Id))
        {
            var itemName = FirstNonEmpty(d.CnName, d.EnName) ?? string.Empty;
            var sku = FirstNonEmpty(d.Sku, $"ITEM{sort + 1}")!;
            var declareElement = FirstNonEmpty(
                d.DeclareElement,
                JoinNonEmpty(" ", d.Model, d.Specifications, d.Attributes, d.Material));
            await _itemRepository.InsertAsync(new Customs9610OrderItem
            {
                Customs9610OrderId = header.Id,
                OrderDeclarationId = d.Id,
                Sku = Truncate(sku, 32) ?? string.Empty,
                CnName = Truncate(itemName, 250) ?? string.Empty,
                ExHsCode = Truncate(FirstNonEmpty(d.ExHsCode, d.HsCode, d.ImHsCode), 10),
                DeclareElement = Truncate(declareElement, 255),
                UnitPrice = d.UnitPrice ?? 0,
                Quantity = d.Quantity ?? 0,
                Amount = d.Amount,
                Unit = Truncate(d.Unit, 3),
                Freight = null,
                SortNo = sort++,
                CreateTime = DateTime.Now,
            });
        }
    }

    private async Task<CustomerExportQualification?> ResolveQualificationAsync(
        Order order,
        CancellationToken cancellationToken)
    {
        if (order.CustomerId is not > 0)
        {
            return null;
        }

        if (order.ExportQualificationId is > 0)
        {
            var owned = await _exportQualificationRepository.GetOwnedAsync(
                order.ExportQualificationId.Value,
                order.CustomerId.Value,
                cancellationToken);
            if (owned != null)
            {
                return owned;
            }
        }

        return await _exportQualificationRepository.GetDefaultAsync(
            order.CustomerId.Value,
            cancellationToken);
    }

    private static void ApplyQualification(Customs9610Order header, CustomerExportQualification? qualification)
    {
        if (qualification == null)
        {
            return;
        }

        header.EcomCorpCode = Truncate(
            FirstNonEmpty(qualification.DomesticConsignorCustomsCode, qualification.SocialCreditCode),
            18);
        header.EcomCorpName = Truncate(
            FirstNonEmpty(qualification.CompanyName, qualification.DomesticConsignor),
            100);
        header.ProducerCode = Truncate(qualification.ProducerCustomsCode, 18);
        header.ProducerName = Truncate(qualification.ProducerName, 100);
        header.ActualSellerCode = Truncate(qualification.SocialCreditCode, 18);
    }

    private static decimal ResolveGrossWeight(IReadOnlyList<OrderWeight> weights)
    {
        var forecast = weights.FirstOrDefault(x =>
            string.Equals(x.Type, OrderWeightTypeCodes.Forecast, StringComparison.OrdinalIgnoreCase));
        var row = forecast ?? weights.FirstOrDefault();
        if (row == null)
        {
            return 0;
        }

        var w = row.ActualWeight ?? row.ChargeableWeight ?? 0;
        return w > 0 ? w : 0;
    }

    private static string? FirstNonEmpty(params string?[] values)
    {
        foreach (var v in values)
        {
            if (!string.IsNullOrWhiteSpace(v))
            {
                return v.Trim();
            }
        }

        return null;
    }

    private static string? JoinNonEmpty(string sep, params string?[] values)
    {
        var parts = values.Where(x => !string.IsNullOrWhiteSpace(x)).Select(x => x!.Trim()).ToList();
        return parts.Count == 0 ? null : string.Join(sep, parts);
    }

    private static string? Truncate(string? value, int max)
    {
        if (string.IsNullOrEmpty(value))
        {
            return value;
        }

        return value.Length <= max ? value : value[..max];
    }
}