using Domain.Entities.Common.ValueObject;
using Domain.Entities.Payments.Danal;
using Domain.Entities.Payments.ValueObject;
using Domain.Entities.Wallets;
using Domain.Entities.Wallets.ValueObject;
using Microsoft.EntityFrameworkCore;
using AdminCancelCommand = Application.Features.Admin.Payment.Danal.Confirm.Cancel.Command;
using AdminCancelHandler = Application.Features.Admin.Payment.Danal.Confirm.Cancel.Handler;

namespace Application.Tests;

[TestClass]
public sealed class AdminDanalCancelHandlerTests
{
    private static async Task<DanalConfirm> SeedConfirmAsync(Infrastructure.Persistence.AppDbContext db, Domain.Entities.Payments.PaymentOrder order)
    {
        var confirm = DanalConfirm.CreateRequest(order.MemberID, order.ID, order.PaymentMethod, order.TransactionID ?? "TX-SEED", order.OrderID, order.Amount, order.MerchantID);
        confirm.SetResponse("0000", "OK");
        await db.DanalConfirm.AddAsync(confirm);
        await db.SaveChangesAsync(default);
        return confirm;
    }

    [TestMethod]
    public async Task AdminForceCancel_RecoversPgChargedPoints()
    {
        // 리뷰 #3 재현: Admin 강제취소가 Adjusted 버킷 차감(항상 0) + 예외 흡수로,
        // PG 현금은 환불됐는데 회원 포인트가 회수되지 않았다.
        // 기대 행위: PgCharged 에서 회수하고 ChargeCancelled 원장을 남긴다.
        using var db = TestDb.Create();
        var memberID = await TestDb.CreateMemberAsync(db);
        var wallet = Wallet.Create(memberID);
        wallet.CreditPgCharge(Money.KRW(10000), "충전", "SEED");
        await db.Wallet.AddAsync(wallet);
        var order = await TestDb.CreateOrderAsync(db, memberID, 10000, paid: true);
        var confirm = await SeedConfirmAsync(db, order);
        var fake = new FakeDanalPayService();
        var handler = new AdminCancelHandler(db, fake);

        var result = await handler.Handle(new AdminCancelCommand(confirm.ID, "admin", "운영자 강제취소"), default);

        Assert.IsTrue(result.IsSuccess, "운영자 강제취소가 성공해야 한다");

        using var verify = TestDb.Create();
        var savedOrder = await verify.PaymentOrder.SingleAsync(o => o.OrderID == order.OrderID);
        Assert.AreEqual(PaymentStatus.Cancelled, savedOrder.Status);

        var savedWallet = await verify.Wallet.Include(w => w.Balances).Include(w => w.Transactions).AsSplitQuery().SingleAsync(w => w.MemberID == memberID);
        Assert.AreEqual(0m, savedWallet.Balances.Single(b => b.Type == WalletBalanceType.PgCharged).Amount.Value, "환불 시 PgCharged 포인트가 회수되어야 한다");
        Assert.IsTrue(savedWallet.Transactions.Any(t => t.TxType == WalletTransactionType.ChargeCancelled && t.Amount.Value == 10000m), "ChargeCancelled 원장이 있어야 한다");
    }

    [TestMethod]
    public async Task AdminForceCancel_PointsSpent_Fails_BeforePgCall()
    {
        using var db = TestDb.Create();
        var memberID = await TestDb.CreateMemberAsync(db);
        var wallet = Wallet.Create(memberID);
        wallet.CreditPgCharge(Money.KRW(10000), "충전", "SEED");
        wallet.Spend(Money.KRW(6000), "사용");
        await db.Wallet.AddAsync(wallet);
        var order = await TestDb.CreateOrderAsync(db, memberID, 10000, paid: true);
        var confirm = await SeedConfirmAsync(db, order);
        var fake = new FakeDanalPayService();
        var handler = new AdminCancelHandler(db, fake);

        var result = await handler.Handle(new AdminCancelCommand(confirm.ID, "admin", "강제취소"), default);

        Assert.IsFalse(result.IsSuccess, "사용분이 있으면 자동 취소를 거절(수동 조정 유도)해야 한다");
        Assert.AreEqual(0, fake.CancelCallCount, "거절은 PG 호출 전에 이뤄져야 한다");
    }
}