using System.Text.Json;
using FluentAssertions;
using Oms.Application.Dtos.Orders;
using Oms.Application.Services.Orders;
using Oms.Domain.ChannelsAggregate.Entities;
using Oms.Domain.OrdersAggregate.Consts;
using Oms.Domain.OrdersAggregate.Entities;
using Oms.Tests.Support;
using Xunit.Abstractions;

namespace Oms.Tests;

/// <summary>
/// 模拟小包订单预报计费全流程，便于在 ParcelBillingCalculator 打断点调试。
/// F5 选「调试：模拟订单计费」或对本类测试方法 Debug Test。
/// </summary>
public class ParcelBillingCalculatorDemoTests
{
    private readonly ITestOutputHelper _output;

    public ParcelBillingCalculatorDemoTests(ITestOutputHelper output) => _output = output;

    /// <summary>
    /// 模拟一单美国美西普货小包：30×20×10cm、实重 1.5kg，走计重→进位→应收/应付算价。
    /// </summary>
    [Fact]
    public void SimulateParcelOrderBilling_FullPipeline_ShouldMatchDesignDoc()
    {
        // —— 1. 模拟 OrderParcelCreateInput 件重尺 ——
        var orderInput = new
        {
            RequestId = "demo-req-001",
            ClientNo = "CLIENT-DEMO-001",
            ProductCode = "US-EXPRESS-01",
            ChannelCode = "CH-US-WEST",
            CargoAttribute = "普货",
            Length = 30M,
            Width = 20M,
            Height = 10M,
            ActualWeight = 1.5M,
            Destination = new { CountryCode = "US", Province = "CA", PostalCode = "90001" }
        };

        _output.WriteLine("=== 模拟订单入参 ===");
        _output.WriteLine(JsonSerializer.Serialize(orderInput, new JsonSerializerOptions { WriteIndented = true }));

        var quoteContext = new ParcelQuoteContext
        {
            CountryCode = orderInput.Destination.CountryCode,
            Province = orderInput.Destination.Province,
            PostalCode = orderInput.Destination.PostalCode,
            CargoAttribute = ParcelBillingCalculator.MapCargoTypeToAttribute(orderInput.CargoAttribute),
            Length = orderInput.Length,
            Width = orderInput.Width,
            Height = orderInput.Height,
            ActualWeight = orderInput.ActualWeight
        };

        // —— 2. KPI 分区匹配（美国 90001 → 美西）——
        var kpiRule = new KpiAreaInfo
        {
            Id = 1,
            CountryCode = "US",
            LeftPostcode = "90000",
            RightPostcode = "96199"
        };
        var kpiArea = new KpiArea { Id = 1, Name = "美西分区" };
        var zoneMatched = ParcelBillingCalculator.IsAreaMatched(
            kpiRule, quoteContext.CountryCode, quoteContext.Province, quoteContext.City, quoteContext.PostalCode);
        var zoneKeys = ParcelBillingCalculator.BuildPriceZoneKeys(kpiRule, kpiArea);
        var zoneName = ParcelBillingCalculator.ResolveZoneName(kpiRule, kpiArea) ?? "美西";

        zoneMatched.Should().BeTrue($"邮编 {quoteContext.PostalCode} 应命中美西分区");
        _output.WriteLine($"分区匹配: {zoneMatched}, 分区名: {zoneName}, 分区键: {string.Join(',', zoneKeys)}");

        // —— 3. 计重（可在 ParcelBillingCalculator.CalculateRawBillableWeight 打断点）——
        var forecastWeight = ParcelBillingCalculator.BuildForecastWeight(quoteContext);
        var weightRules = new[] { ParcelBillingTestData.GwRule() };
        var (volumetricWeight, rawBillable) =
            ParcelBillingCalculator.CalculateRawBillableWeight(forecastWeight, weightRules);
        var roundingRules = new[] { ParcelBillingTestData.RoundingRange(0, 30, "0.5") };
        var chargeableWeight = ParcelBillingCalculator.ApplyRounding(rawBillable, roundingRules);

        _output.WriteLine($"材积重: {volumetricWeight} kg, 原始计费重: {rawBillable} kg, 进位后计费重: {chargeableWeight} kg");

        chargeableWeight.Should().Be(1.5M);

        // —— 4. 应收（卖价）——
        var (priceVersion, effectiveTime) = ParcelBillingTestData.SnapshotMeta();
        var receivableSnapshot = ParcelBillingTestData.BuildReceivableSnapshot(
            ParcelBillingTestData.ReceivablePriceItem(
                1, "freight",
                ParcelBillingTestData.ContinueFreightDetail()),
            ParcelBillingTestData.ReceivablePriceItem(
                1, "操作费",
                ParcelBillingTestData.FixedPriceDetail(5M)));

        var receivableFees = ParcelBillingCalculator.CalculateForecastReceivableFees(
            receivableSnapshot,
            priceVersion,
            effectiveTime,
            chargeableWeight,
            new[] { "美西" },
            quoteContext.CargoAttribute,
            null);

        var receivableSummary = ParcelBillingCalculator.SummarizeFees(receivableFees);

        _output.WriteLine("=== 应收费用 ===");
        foreach (var fee in receivableFees)
        {
            _output.WriteLine($"  {fee.CostItem}: {fee.Amount} {fee.Currency} ({fee.ChargingStage})");
        }
        _output.WriteLine($"应收合计: {receivableSummary.TotalCost} (运费 {receivableSummary.Freight} + 杂费 {receivableSummary.OtherFees})");

        receivableSummary.Freight.Should().Be(24M); // 1.5kg 续单价：首重18 + 续重6
        receivableSummary.TotalCost.Should().Be(29M);

        // —— 5. 应付（买价）——
        var payablePrices = ParcelBillingTestData.BuildPayablePrices(
            ParcelBillingTestData.PayablePriceItem(
                1, "freight",
                ParcelBillingTestData.ContinueFreightDetail(
                    firstWeight: 1M, firstPrice: 12M, continueUnit: 0.5M, continuePrice: 4M)));

        var payableFees = ParcelBillingCalculator.CalculateForecastPayableFees(
            payablePrices,
            priceVersion,
            effectiveTime,
            chargeableWeight,
            "美西",
            quoteContext.CargoAttribute);

        var payableSummary = ParcelBillingCalculator.SummarizeFees(payableFees);

        _output.WriteLine("=== 应付费用 ===");
        foreach (var fee in payableFees)
        {
            _output.WriteLine($"  {fee.CostItem}: {fee.Amount} {fee.Currency}");
        }
        _output.WriteLine($"应付合计: {payableSummary.TotalCost}");

        payableSummary.Freight.Should().Be(16M); // 买价：12 + 4

        _output.WriteLine($"毛利(应收-应付运费): {receivableSummary.Freight - payableSummary.Freight}");
    }
}