SVSimServer/SVSim.UnitTests/Controllers/PackControllerOpenTests.cs

using System.Net;
using System.Text;
using System.Text.Json;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using SVSim.Database;
using SVSim.Database.Enums;
using SVSim.Database.Models;
using SVSim.UnitTests.Infrastructure;

namespace SVSim.UnitTests.Controllers;

public class PackControllerOpenTests
{
    private static StringContent JsonBody(string json) => new(json, Encoding.UTF8, "application/json");

    /// <summary>
    /// Seeds an active pack (parent 10001, base = first seeded card set) with one rupee child
    /// gacha (gacha_id=400002, cost=100), then gives the viewer enough rupees to buy once.
    /// </summary>
    private static async Task<int> SeedOpenablePack(SVSimTestFactory f, long viewerId, ulong rupees = 200)
    {
        int baseId;
        using (var scope = f.Services.CreateScope())
        {
            var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
            baseId = await db.CardSets.Where(s => s.Cards.Count > 0).Select(s => s.Id).FirstAsync();

            db.Packs.Add(new PackConfigEntry
            {
                Id = 10001, BasePackId = baseId, PackCategory = PackCategory.None,
                CommenceDate = DateTime.UtcNow.AddDays(-1), CompleteDate = DateTime.UtcNow.AddDays(30),
                GachaType = 1, GachaDetail = "test", SleeveId = 3000011,
                ChildGachas = {
                    new PackChildGachaEntry { GachaId = 400002, TypeDetail = 7, Cost = 100, CardCount = 8 },
                },
            });
            var v = await db.Viewers.FirstAsync(x => x.Id == viewerId);
            v.Currency.Rupees = rupees;
            await db.SaveChangesAsync();
        }
        return baseId;
    }

    [Test]
    public async Task Open_with_rupees_returns_8_cards_and_deducts_currency()
    {
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        await SeedOpenablePack(factory, viewerId);

        using var client = factory.CreateAuthenticatedClient(viewerId);
        var json = """{"viewer_id":"0","steam_id":0,"steam_session_ticket":"","parent_gacha_id":10001,"gacha_id":400002,"gacha_type":1,"pack_number":1,"exclude_card_ids":[]}""";
        var response = await client.PostAsync("/pack/open", JsonBody(json));

        var body = await response.Content.ReadAsStringAsync();
        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK), body);

        using var doc = JsonDocument.Parse(body);
        var pack = doc.RootElement.GetProperty("pack_list");
        Assert.That(pack.GetArrayLength(), Is.EqualTo(8));

        using var scope = factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
        var v = await db.Viewers.FirstAsync(x => x.Id == viewerId);
        Assert.That(v.Currency.Rupees, Is.EqualTo(100UL), "200 starting - 100 cost");
    }

    [Test]
    public async Task Open_persists_drawn_cards_to_viewer_collection()
    {
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        await SeedOpenablePack(factory, viewerId);

        using var client = factory.CreateAuthenticatedClient(viewerId);
        var json = """{"viewer_id":"0","steam_id":0,"steam_session_ticket":"","parent_gacha_id":10001,"gacha_id":400002,"gacha_type":1,"pack_number":1,"exclude_card_ids":[]}""";
        await client.PostAsync("/pack/open", JsonBody(json));

        using var scope = factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
        var v = await db.Viewers.Include(x => x.Cards).ThenInclude(c => c.Card).FirstAsync(x => x.Id == viewerId);
        var totalGranted = v.Cards.Sum(c => c.Count);
        Assert.That(totalGranted, Is.EqualTo(8), "8 cards drawn, all persisted (Count sums to 8 even when duplicates collapse).");
    }

    [Test]
    public async Task Open_increments_viewer_open_count()
    {
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        await SeedOpenablePack(factory, viewerId);

        using var client = factory.CreateAuthenticatedClient(viewerId);
        var json = """{"viewer_id":"0","steam_id":0,"steam_session_ticket":"","parent_gacha_id":10001,"gacha_id":400002,"gacha_type":1,"pack_number":1,"exclude_card_ids":[]}""";
        await client.PostAsync("/pack/open", JsonBody(json));

        using var scope = factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
        var v = await db.Viewers.Include(x => x.PackOpenCounts).FirstAsync(x => x.Id == viewerId);
        Assert.That(v.PackOpenCounts.Single(p => p.PackId == 10001).OpenCount, Is.EqualTo(1));
    }

    [Test]
    public async Task Open_rejects_when_class_id_present()
    {
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        await SeedOpenablePack(factory, viewerId);

        using var client = factory.CreateAuthenticatedClient(viewerId);
        var json = """{"viewer_id":"0","steam_id":0,"steam_session_ticket":"","parent_gacha_id":10001,"gacha_id":400002,"gacha_type":1,"pack_number":1,"exclude_card_ids":[],"class_id":3}""";
        var response = await client.PostAsync("/pack/open", JsonBody(json));

        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotImplemented));
    }

    [Test]
    public async Task Open_rejects_when_target_card_id_present()
    {
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        await SeedOpenablePack(factory, viewerId);

        using var client = factory.CreateAuthenticatedClient(viewerId);
        var json = """{"viewer_id":"0","steam_id":0,"steam_session_ticket":"","parent_gacha_id":10001,"gacha_id":400002,"gacha_type":1,"pack_number":1,"exclude_card_ids":[],"target_card_id":12345}""";
        var response = await client.PostAsync("/pack/open", JsonBody(json));

        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotImplemented));
    }

    [Test]
    public async Task Open_rejects_skin_pack_category()
    {
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        using (var scope = factory.Services.CreateScope())
        {
            var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
            db.Packs.Add(new PackConfigEntry
            {
                Id = 70001, BasePackId = 70001, PackCategory = PackCategory.LeaderSkinPack,
                CommenceDate = DateTime.UtcNow.AddDays(-1), CompleteDate = DateTime.UtcNow.AddDays(30),
                GachaType = 1, GachaDetail = "skin pack",
                ChildGachas = { new PackChildGachaEntry { GachaId = 700017, TypeDetail = 7, Cost = 100, CardCount = 8 } },
            });
            await db.SaveChangesAsync();
        }
        using var client = factory.CreateAuthenticatedClient(viewerId);
        var json = """{"viewer_id":"0","steam_id":0,"steam_session_ticket":"","parent_gacha_id":70001,"gacha_id":700017,"gacha_type":1,"pack_number":1,"exclude_card_ids":[]}""";
        var response = await client.PostAsync("/pack/open", JsonBody(json));

        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotImplemented));
    }

    [Test]
    public async Task Open_rejects_ticket_type_detail()
    {
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        using (var scope = factory.Services.CreateScope())
        {
            var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
            db.Packs.Add(new PackConfigEntry
            {
                Id = 92001, BasePackId = 90001, PackCategory = PackCategory.SpecialCardPack,
                CommenceDate = DateTime.UtcNow.AddDays(-1), CompleteDate = DateTime.UtcNow.AddDays(30),
                GachaType = 1, GachaDetail = "ticket-only pack", SleeveId = 5090001,
                ChildGachas = { new PackChildGachaEntry { GachaId = 920002, TypeDetail = 5, Cost = 1, CardCount = 8, ItemId = 92001 } },
            });
            await db.SaveChangesAsync();
        }
        using var client = factory.CreateAuthenticatedClient(viewerId);
        var json = """{"viewer_id":"0","steam_id":0,"steam_session_ticket":"","parent_gacha_id":92001,"gacha_id":920002,"gacha_type":1,"pack_number":1,"exclude_card_ids":[]}""";
        var response = await client.PostAsync("/pack/open", JsonBody(json));

        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotImplemented));
    }

    [Test]
    public async Task Open_rejects_insufficient_rupees()
    {
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        await SeedOpenablePack(factory, viewerId, rupees: 50);   // need 100

        using var client = factory.CreateAuthenticatedClient(viewerId);
        var json = """{"viewer_id":"0","steam_id":0,"steam_session_ticket":"","parent_gacha_id":10001,"gacha_id":400002,"gacha_type":1,"pack_number":1,"exclude_card_ids":[]}""";
        var response = await client.PostAsync("/pack/open", JsonBody(json));

        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest));

        using var scope = factory.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
        var v = await db.Viewers.FirstAsync(x => x.Id == viewerId);
        Assert.That(v.Currency.Rupees, Is.EqualTo(50UL), "no deduction on insufficient-funds reject");
    }

    [Test]
    public async Task Open_with_crystals_deducts_crystals()
    {
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        using (var scope = factory.Services.CreateScope())
        {
            var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
            int baseId = await db.CardSets.Where(s => s.Cards.Count > 0).Select(s => s.Id).FirstAsync();
            db.Packs.Add(new PackConfigEntry
            {
                Id = 10001, BasePackId = baseId, PackCategory = PackCategory.None,
                CommenceDate = DateTime.UtcNow.AddDays(-1), CompleteDate = DateTime.UtcNow.AddDays(30),
                GachaType = 1, GachaDetail = "test",
                ChildGachas = { new PackChildGachaEntry { GachaId = 100002, TypeDetail = 2, Cost = 100, CardCount = 8 } },
            });
            var v = await db.Viewers.FirstAsync(x => x.Id == viewerId);
            v.Currency.Crystals = 250;
            await db.SaveChangesAsync();
        }

        using var client = factory.CreateAuthenticatedClient(viewerId);
        // gacha_type:1 (parent pack's gacha_type) not :2 (child's type_detail) — see project_wire_pack_gacha_type memory.
        var json = """{"viewer_id":"0","steam_id":0,"steam_session_ticket":"","parent_gacha_id":10001,"gacha_id":100002,"gacha_type":1,"pack_number":1,"exclude_card_ids":[]}""";
        var response = await client.PostAsync("/pack/open", JsonBody(json));

        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK));

        using (var scope2 = factory.Services.CreateScope())
        {
            var db2 = scope2.ServiceProvider.GetRequiredService<SVSimDbContext>();
            var v2 = await db2.Viewers.FirstAsync(x => x.Id == viewerId);
            Assert.That(v2.Currency.Crystals, Is.EqualTo(150UL));
        }
    }

    [Test]
    public async Task Open_daily_marks_last_daily_free_at_and_rejects_second_attempt()
    {
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        using (var scope = factory.Services.CreateScope())
        {
            var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
            int baseId = await db.CardSets.Where(s => s.Cards.Count > 0).Select(s => s.Id).FirstAsync();
            db.Packs.Add(new PackConfigEntry
            {
                Id = 10001, BasePackId = baseId, PackCategory = PackCategory.None,
                CommenceDate = DateTime.UtcNow.AddDays(-1), CompleteDate = DateTime.UtcNow.AddDays(30),
                GachaType = 1, GachaDetail = "daily test",
                ChildGachas = { new PackChildGachaEntry { GachaId = 200001, TypeDetail = 3, Cost = 0, CardCount = 1, IsDailySingle = true } },
            });
            await db.SaveChangesAsync();
        }

        using var client = factory.CreateAuthenticatedClient(viewerId);
        // gacha_type:1 (parent pack's gacha_type) not :3 (child's type_detail=DAILY) — prod-correct.
        var json = """{"viewer_id":"0","steam_id":0,"steam_session_ticket":"","parent_gacha_id":10001,"gacha_id":200001,"gacha_type":1,"pack_number":1,"exclude_card_ids":[]}""";

        var first = await client.PostAsync("/pack/open", JsonBody(json));
        Assert.That(first.StatusCode, Is.EqualTo(HttpStatusCode.OK), await first.Content.ReadAsStringAsync());

        var second = await client.PostAsync("/pack/open", JsonBody(json));
        Assert.That(second.StatusCode, Is.EqualTo(HttpStatusCode.BadRequest),
            "Second daily-free open the same UTC day should be rejected.");
    }

    // ---------------- Regression tests for wire-shape quirks ----------------

    [Test]
    public async Task Open_succeeds_when_request_gacha_type_differs_from_child_type_detail()
    {
        // Prod client sends gacha_type=1 (parent pack's gacha_type) for every buy on a
        // gacha_type=1 pack, regardless of which child gacha is being bought (RUPY_MULTI=7,
        // DAILY=3, CRYSTAL_MULTI=2, TICKET_MULTI=5, ...). Server must NOT reject on
        // `child.TypeDetail != request.GachaType` — gacha_id alone identifies the child.
        // See project_wire_pack_gacha_type memory.
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        await SeedOpenablePack(factory, viewerId);

        using var client = factory.CreateAuthenticatedClient(viewerId);
        // gacha_id 400002 is RUPY_MULTI (type_detail=7); request sends gacha_type=1 — should succeed.
        var json = """{"viewer_id":"0","steam_id":0,"steam_session_ticket":"","parent_gacha_id":10001,"gacha_id":400002,"gacha_type":1,"pack_number":1,"exclude_card_ids":[]}""";
        var response = await client.PostAsync("/pack/open", JsonBody(json));

        var body = await response.Content.ReadAsStringAsync();
        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK), body);
    }

    [Test]
    public async Task Open_reward_list_includes_post_state_rupee_balance()
    {
        // Client's PlayerStaticData.UpdateHaveUserGoodsNum does `UserRupyCount = reward_num`
        // (direct assignment). Without an entry, the on-screen rupee count stays stale until
        // restart / /mypage/refresh. Verify the entry shape: reward_type=9 (Rupy), reward_id=0,
        // reward_num=new post-state balance (starting 200 - cost 100 = 100).
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        await SeedOpenablePack(factory, viewerId, rupees: 200);

        using var client = factory.CreateAuthenticatedClient(viewerId);
        var json = """{"viewer_id":"0","steam_id":0,"steam_session_ticket":"","parent_gacha_id":10001,"gacha_id":400002,"gacha_type":1,"pack_number":1,"exclude_card_ids":[]}""";
        var response = await client.PostAsync("/pack/open", JsonBody(json));

        var body = await response.Content.ReadAsStringAsync();
        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK), body);

        using var doc = JsonDocument.Parse(body);
        var rewardList = doc.RootElement.GetProperty("reward_list");
        Assert.That(rewardList.GetArrayLength(), Is.GreaterThan(0),
            "reward_list must be populated — empty list leaves client cache stale.");

        var rupyEntry = Enumerable.Range(0, rewardList.GetArrayLength())
            .Select(i => rewardList[i])
            .FirstOrDefault(e => e.GetProperty("reward_type").GetInt32() == 9);

        Assert.That(rupyEntry.ValueKind, Is.Not.EqualTo(JsonValueKind.Undefined),
            "missing Rupy (type=9) entry — client will keep showing the old rupee balance.");
        Assert.That(rupyEntry.GetProperty("reward_id").GetInt64(), Is.EqualTo(0L));
        Assert.That(rupyEntry.GetProperty("reward_num").GetInt32(), Is.EqualTo(100),
            "reward_num is the new TOTAL balance (200 starting - 100 cost), not a delta.");
    }

    [Test]
    public async Task Open_reward_list_includes_post_state_card_counts()
    {
        // For each unique drawn card the client expects `{reward_type:5, reward_id:<card_id>,
        // reward_num:<new total owned count>}`. Without these the in-session collection cache
        // is stale (cards appear in the open animation but the collection view doesn't update).
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        await SeedOpenablePack(factory, viewerId);

        using var client = factory.CreateAuthenticatedClient(viewerId);
        var json = """{"viewer_id":"0","steam_id":0,"steam_session_ticket":"","parent_gacha_id":10001,"gacha_id":400002,"gacha_type":1,"pack_number":1,"exclude_card_ids":[]}""";
        var response = await client.PostAsync("/pack/open", JsonBody(json));

        var body = await response.Content.ReadAsStringAsync();
        using var doc = JsonDocument.Parse(body);
        var packList = doc.RootElement.GetProperty("pack_list");
        var rewardList = doc.RootElement.GetProperty("reward_list");

        // Every distinct card_id in pack_list must have a matching type=5 reward_list entry.
        var drawnCardIds = Enumerable.Range(0, packList.GetArrayLength())
            .Select(i => packList[i].GetProperty("card_id").GetInt64())
            .Distinct()
            .ToHashSet();

        var cardEntryIds = Enumerable.Range(0, rewardList.GetArrayLength())
            .Select(i => rewardList[i])
            .Where(e => e.GetProperty("reward_type").GetInt32() == 5)
            .Select(e => e.GetProperty("reward_id").GetInt64())
            .ToHashSet();

        Assert.That(cardEntryIds, Is.SupersetOf(drawnCardIds),
            "Every unique drawn card_id must appear in reward_list with reward_type=5.");
    }

    [Test]
    public async Task OpenPack_ResponseIncludesSkinEntry_WhenLeaderCardDrawn()
    {
        // Verifies the C.1 refactor surfaces cosmetic grants from ICardAcquisitionService into
        // the /pack/open response. Seeds a pack whose pool contains ONLY a known leader card
        // (so every slot is forced to that card via PickCardOfRarity's fallback walk), plus the
        // CardCosmeticReward mapping + LeaderSkinEntry master row. Expectation: response's
        // reward_list contains a type=10 (Skin) entry with the mapped skin_id.
        const long LeaderCardId = 704741010L;
        const int  SkinId       = 407;

        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        int parentGachaId = await SeedSingleLeaderCardPack(factory, LeaderCardId);
        await SeedCosmeticMapping(factory, LeaderCardId, SkinId);

        using (var scope = factory.Services.CreateScope())
        {
            var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
            var v = await db.Viewers.FirstAsync(x => x.Id == viewerId);
            v.Currency.Rupees = 200;
            await db.SaveChangesAsync();
        }

        using var client = factory.CreateAuthenticatedClient(viewerId);
        var json = $$"""{"viewer_id":"0","steam_id":0,"steam_session_ticket":"","parent_gacha_id":{{parentGachaId}},"gacha_id":{{parentGachaId * 100 + 2}},"gacha_type":1,"pack_number":1,"exclude_card_ids":[]}""";
        var response = await client.PostAsync("/pack/open", JsonBody(json));

        var body = await response.Content.ReadAsStringAsync();
        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK), body);

        using var doc = JsonDocument.Parse(body);
        var rewardList = doc.RootElement.GetProperty("reward_list");
        var skinEntry = Enumerable.Range(0, rewardList.GetArrayLength())
            .Select(i => rewardList[i])
            .FirstOrDefault(e => e.GetProperty("reward_type").GetInt32() == 10);

        Assert.That(skinEntry.ValueKind, Is.Not.EqualTo(JsonValueKind.Undefined),
            "expected a Skin (type=10) entry in /pack/open's reward_list when a leader card is drawn");
        Assert.That(skinEntry.GetProperty("reward_id").GetInt64(), Is.EqualTo((long)SkinId));
    }

    /// <summary>
    /// Creates a new CardSet whose ONLY non-foil card is <paramref name="leaderCardId"/>, plus
    /// a PackConfigEntry pointing at that set. PackOpenService's PickCardOfRarity fallback walks
    /// every rarity and lands on the sole available card, so every draw from this pack is
    /// guaranteed to produce <paramref name="leaderCardId"/>. Returns the parent gacha id.
    /// </summary>
    private static async Task<int> SeedSingleLeaderCardPack(SVSimTestFactory f, long leaderCardId)
    {
        const int CardSetId    = 99001;
        const int ParentGachaId = 99001;

        using var scope = f.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();

        // Reuse an existing card row if one exists at this id (e.g. seeded by globals); else
        // insert a Legendary stub. Rarity=Legendary so SV Classic slot-8 (which forbids Bronze)
        // resolves cleanly without falling through.
        var card = await db.Cards.FirstOrDefaultAsync(c => c.Id == leaderCardId);
        if (card is null)
        {
            card = new ShadowverseCardEntry { Id = leaderCardId, Name = $"SeededLeader{leaderCardId}", Rarity = Rarity.Legendary };
            db.Cards.Add(card);
            await db.SaveChangesAsync();
        }

        // Attach to a dedicated CardSet so the pool resolver (PackCategory.None branch) sees
        // exactly this one card.
        var set = new ShadowverseCardSetEntry
        {
            Id = CardSetId, Name = "SingleLeaderTestSet",
            IsInRotation = false, IsBasic = false,
            Cards = new List<ShadowverseCardEntry> { card },
        };
        db.CardSets.Add(set);

        db.Packs.Add(new PackConfigEntry
        {
            Id = ParentGachaId, BasePackId = CardSetId, PackCategory = PackCategory.None,
            CommenceDate = DateTime.UtcNow.AddDays(-1), CompleteDate = DateTime.UtcNow.AddDays(30),
            GachaType = 1, GachaDetail = "single-leader test", SleeveId = 3000099,
            ChildGachas = {
                new PackChildGachaEntry { GachaId = ParentGachaId * 100 + 2, TypeDetail = 7, Cost = 100, CardCount = 8 },
            },
        });
        await db.SaveChangesAsync();
        return ParentGachaId;
    }

    /// <summary>
    /// Inserts a CardCosmeticReward(Skin) row mapping <paramref name="cardId"/> → <paramref name="skinId"/>,
    /// and ensures the LeaderSkinEntry master row exists. Production seed for CardCosmeticReward
    /// is stripped in tests by SqliteFriendlyModelCustomizer, so the test must insert its own.
    /// </summary>
    private static async Task SeedCosmeticMapping(SVSimTestFactory f, long cardId, int skinId)
    {
        using var scope = f.Services.CreateScope();
        var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();

        if (await db.LeaderSkins.FindAsync(skinId) is null)
            db.LeaderSkins.Add(new LeaderSkinEntry { Id = skinId, Name = $"TestSkin{skinId}" });

        db.CardCosmeticRewards.Add(new CardCosmeticReward
        {
            CardId = cardId, Type = CosmeticType.Skin, CosmeticId = skinId, Quantity = 1,
        });
        await db.SaveChangesAsync();
    }

    [Test]
    public async Task PackOpen_accrues_gacha_points_per_pack_drawn()
    {
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        using (var scope = factory.Services.CreateScope())
        {
            var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
            db.Classes.Add(new ClassEntry { Id = 0, Name = "Neutral" });
            var set = new ShadowverseCardSetEntry { Id = 10008, IsInRotation = true };
            db.CardSets.Add(set);
            // Need a pool that can draw 8 cards across the 4 default rarities.
            for (int i = 0; i < 30; i++)
            {
                set.Cards.Add(new ShadowverseCardEntry
                {
                    Id = 10804_1010 + i,
                    Name = $"c{i}",
                    Rarity = (Rarity)((i % 4) + 1),  // Bronze..Legendary
                    Class = db.Classes.Local.First(),
                    IsFoil = false,
                });
            }
            db.Packs.Add(new PackConfigEntry
            {
                Id = 10008, BasePackId = 10008, PackCategory = PackCategory.LegendCardPack,
                CommenceDate = DateTime.UtcNow.AddDays(-1), CompleteDate = DateTime.UtcNow.AddDays(30),
                GachaType = 1,
                GachaPointConfig = new PackGachaPointConfig { ExchangeablePoint = 400, IncreaseGachaPoint = 1 },
                ChildGachas =
                {
                    new PackChildGachaEntry
                    {
                        GachaId = 100087, TypeDetail = 7, Cost = 100, CardCount = 8,
                        OverrideIncreaseGachaPoint = 0,
                    },
                },
            });
            var viewer = await db.Viewers.FirstAsync(v => v.Id == viewerId);
            viewer.Currency.Rupees = 10000;
            await db.SaveChangesAsync();
        }

        using var client = factory.CreateAuthenticatedClient(viewerId);
        var body = new StringContent(
            """{"parent_gacha_id":10008,"gacha_id":100087,"gacha_type":1,"pack_number":3,"exclude_card_ids":[],"viewer_id":"0","steam_id":0,"steam_session_ticket":""}""",
            System.Text.Encoding.UTF8, "application/json");
        var response = await client.PostAsync("/pack/open", body);
        var text = await response.Content.ReadAsStringAsync();
        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK), text);

        using var scope2 = factory.Services.CreateScope();
        var db2 = scope2.ServiceProvider.GetRequiredService<SVSimDbContext>();
        var v = await db2.Viewers
            .Include(x => x.GachaPointBalances)
            .FirstAsync(x => x.Id == viewerId);
        Assert.That(v.GachaPointBalances.Single().Points, Is.EqualTo(3));
    }

    [Test]
    public async Task TutorialPackOpen_does_not_accrue_gacha_points()
    {
        using var factory = new SVSimTestFactory();
        long viewerId = await factory.SeedViewerAsync();
        // Seed the starter pack 99047 with a GachaPointConfig set — the tutorial-path skip
        // must hold even when the pack is technically point-eligible.
        using (var scope = factory.Services.CreateScope())
        {
            var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
            db.Classes.Add(new ClassEntry { Id = 0, Name = "Neutral" });
            var set = new ShadowverseCardSetEntry { Id = 99047, IsInRotation = true };
            db.CardSets.Add(set);
            for (int i = 0; i < 30; i++)
            {
                set.Cards.Add(new ShadowverseCardEntry
                {
                    Id = 99047_1010 + i, Name = $"c{i}",
                    Rarity = (Rarity)((i % 4) + 1),
                    Class = db.Classes.Local.First(), IsFoil = false,
                });
            }
            db.Items.Add(new ItemEntry { Id = 90001, Name = "starter-ticket" });
            db.Packs.Add(new PackConfigEntry
            {
                Id = 99047, BasePackId = 99047, PackCategory = PackCategory.LegendCardPack,
                CommenceDate = DateTime.UtcNow.AddDays(-1), CompleteDate = DateTime.UtcNow.AddDays(30),
                GachaType = 1,
                GachaPointConfig = new PackGachaPointConfig { ExchangeablePoint = 400, IncreaseGachaPoint = 1 },
                ChildGachas =
                {
                    new PackChildGachaEntry
                    {
                        GachaId = 990475, TypeDetail = 5, Cost = 0, CardCount = 8,
                        ItemId = 90001,
                    },
                },
            });
            var viewer = await db.Viewers
                .Include(v => v.Items).ThenInclude(i => i.Item)
                .FirstAsync(v => v.Id == viewerId);
            viewer.Items.Add(new OwnedItemEntry { Item = db.Items.Local.First(), Count = 1, Viewer = viewer });
            viewer.MissionData.TutorialState = 41;  // pre-END so the tutorial path is allowed
            await db.SaveChangesAsync();
        }

        using var client = factory.CreateAuthenticatedClient(viewerId);
        var body = new StringContent(
            """{"parent_gacha_id":99047,"gacha_id":990475,"gacha_type":1,"pack_number":1,"exclude_card_ids":[],"viewer_id":"0","steam_id":0,"steam_session_ticket":""}""",
            System.Text.Encoding.UTF8, "application/json");
        var response = await client.PostAsync("/tutorial/pack_open", body);
        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK),
            await response.Content.ReadAsStringAsync());

        using var scope2 = factory.Services.CreateScope();
        var db2 = scope2.ServiceProvider.GetRequiredService<SVSimDbContext>();
        var v = await db2.Viewers
            .Include(x => x.GachaPointBalances)
            .FirstAsync(x => x.Id == viewerId);
        Assert.That(v.GachaPointBalances, Is.Empty, "tutorial path must not accrue gacha points");
    }
}