SVSimServer/SVSim.BattleNode/Lifecycle/ScriptedLifecycle.cs

using SVSim.BattleNode.Protocol;

namespace SVSim.BattleNode.Lifecycle;

/// <summary>
/// v1 Path-A scripted opponent. Hand-rolled static frames good enough to land the client on
/// the mulligan screen and let them play turn 1. Templates derived from
/// data_dumps/captures/battle-traffic_tk2_regular.ndjson.
/// </summary>
public static class ScriptedLifecycle
{
    /// <summary>30 dummy cardIds — repeats of a stable neutral card.</summary>
    public static readonly long DummyCardId = 100011010;

    public const long FakeOpponentViewerId = 999_999_999L;

    public static MsgEnvelope BuildMatched(long playerViewerId, long opponentViewerId, string battleId)
    {
        var body = new Dictionary<string, object?>
        {
            ["selfInfo"] = new Dictionary<string, object?>
            {
                ["country_code"] = "KOR",
                ["userName"] = "Player",
                ["sleeveId"] = "3000011",
                ["emblemId"] = "701441011",
                ["degreeId"] = "300003",
                ["fieldId"] = 43,
                ["isOfficial"] = 0,
                ["oppoId"] = opponentViewerId,
                ["seed"] = 17548138L,
            },
            ["oppoInfo"] = new Dictionary<string, object?>
            {
                ["country_code"] = "JPN",
                ["userName"] = "Opponent",
                ["sleeveId"] = "704141010",
                ["emblemId"] = "400001100",
                ["degreeId"] = "120027",
                ["fieldId"] = 5,
                ["isOfficial"] = 0,
                ["oppoId"] = playerViewerId,
                ["seed"] = 17548138L,
                ["oppoDeckCount"] = 30,
            },
            ["selfDeck"] = BuildDummyDeck(),
        };
        return EnvelopeForPush(NetworkBattleUri.Matched, body, bid: battleId);
    }

    public static MsgEnvelope BuildBattleStart(long playerViewerId)
    {
        var body = new Dictionary<string, object?>
        {
            ["turnState"] = 0,             // player goes first
            ["battleType"] = 11,           // TK2 NetworkBattleType
            ["selfInfo"] = new Dictionary<string, object?>
            {
                ["rank"] = "10",
                ["battlePoint"] = "6270",
                ["classId"] = "1",
                ["charaId"] = "1",
                ["cardMasterName"] = "card_master_node_10015",
            },
            ["oppoInfo"] = new Dictionary<string, object?>
            {
                ["rank"] = "1",
                ["isMasterRank"] = "0",
                ["battlePoint"] = 0,
                ["masterPoint"] = "0",
                ["classId"] = "8",
                ["charaId"] = "8",
                ["cardMasterName"] = "card_master_node_10015",
            },
        };
        return EnvelopeForPush(NetworkBattleUri.BattleStart, body);
    }

    public static MsgEnvelope BuildDeal()
    {
        var body = new Dictionary<string, object?>
        {
            ["self"] = new List<object?>
            {
                new Dictionary<string, object?> { ["pos"] = 0, ["idx"] = 1 },
                new Dictionary<string, object?> { ["pos"] = 1, ["idx"] = 2 },
                new Dictionary<string, object?> { ["pos"] = 2, ["idx"] = 3 },
            },
            ["oppo"] = new List<object?>
            {
                new Dictionary<string, object?> { ["pos"] = 0, ["idx"] = 1 },
                new Dictionary<string, object?> { ["pos"] = 1, ["idx"] = 2 },
                new Dictionary<string, object?> { ["pos"] = 2, ["idx"] = 3 },
            },
        };
        return EnvelopeForPush(NetworkBattleUri.Deal, body);
    }

    public static MsgEnvelope BuildSwapResponse(IReadOnlyList<long> swapIndices)
    {
        // v1: ignore the player's chosen indices and echo the same hand back.
        // (Acceptable because the client doesn't validate which idxs come back — it just renders them.)
        _ = swapIndices;
        var body = new Dictionary<string, object?>
        {
            ["self"] = new List<object?>
            {
                new Dictionary<string, object?> { ["pos"] = 0, ["idx"] = 1 },
                new Dictionary<string, object?> { ["pos"] = 1, ["idx"] = 2 },
                new Dictionary<string, object?> { ["pos"] = 2, ["idx"] = 3 },
            },
        };
        return EnvelopeForPush(NetworkBattleUri.Swap, body);
    }

    public static MsgEnvelope BuildReady()
    {
        var body = new Dictionary<string, object?>
        {
            ["self"] = new List<object?>
            {
                new Dictionary<string, object?> { ["pos"] = 0, ["idx"] = 1 },
                new Dictionary<string, object?> { ["pos"] = 1, ["idx"] = 2 },
                new Dictionary<string, object?> { ["pos"] = 2, ["idx"] = 3 },
            },
            ["oppo"] = new List<object?>
            {
                new Dictionary<string, object?> { ["pos"] = 0, ["idx"] = 1 },
                new Dictionary<string, object?> { ["pos"] = 1, ["idx"] = 2 },
                new Dictionary<string, object?> { ["pos"] = 2, ["idx"] = 3 },
            },
            ["idxChangeSeed"] = 771335280,
            ["spin"] = 243,
        };
        return EnvelopeForPush(NetworkBattleUri.Ready, body);
    }

    private static List<object?> BuildDummyDeck()
    {
        var deck = new List<object?>(30);
        for (var i = 1; i <= 30; i++)
        {
            deck.Add(new Dictionary<string, object?>
            {
                ["idx"] = i,
                ["cardId"] = DummyCardId,
            });
        }
        return deck;
    }

    private static MsgEnvelope EnvelopeForPush(NetworkBattleUri uri, Dictionary<string, object?> body, string? bid = null)
    {
        // Synchronize-push routing in the client's OnReceived drops any frame whose
        // resultCode != Success (1). Absent counts as 0 (None) and is also dropped — so we
        // MUST include it on every scripted push, not just InitNetwork ack / BattleFinish.
        // See server-to-client.md §"Routing in OnReceived" and the matching prod captures.
        body["resultCode"] = (int)ReceiveNodeResultCode.Success;
        return new MsgEnvelope(uri,
            ViewerId: FakeOpponentViewerId,
            Uuid: "node-stub",
            Bid: bid,
            Try: 0,
            Cat: EmitCategory.Battle,
            PubSeq: null,
            PlaySeq: null,         // OutboundSequencer.AssignAndArchive stamps this
            Body: body);
    }
}