40 lines
1.7 KiB
C#
40 lines
1.7 KiB
C#
using SVSim.BattleNode.Lifecycle;
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using SVSim.BattleNode.Protocol;
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using SVSim.BattleNode.Sessions.Participants; // IHasHandshakePhase
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namespace SVSim.BattleNode.Sessions.Dispatch.Handlers;
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internal sealed class SwapHandler : IFrameHandler
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{
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public IReadOnlyList<DispatchRoute> Handle(FrameDispatchContext ctx)
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{
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if (ctx.SenderPhase != BattleSessionPhase.AwaitingSwap)
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return Array.Empty<DispatchRoute>();
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var routes = new List<DispatchRoute>();
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var hand = ScriptedLifecycle.ComputeHandAfterSwap(BattleFrames.ExtractIdxList(ctx.Env));
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// SwapResponse is always immediate — completes the sender's own mulligan UI.
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routes.Add(new DispatchRoute(ctx.From, ScriptedLifecycle.BuildSwapResponse(hand), false));
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ctx.State.PostSwapHands[ctx.From] = hand;
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ctx.SenderPhase = BattleSessionPhase.AfterReady;
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// Release Ready to every swapper once all handshake-driving participants have swapped.
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// IHasHandshakePhase membership IS the "participates in mulligan" set.
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var swappers = new[] { ctx.A, ctx.B }.Where(p => p is IHasHandshakePhase).ToList();
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if (swappers.All(ctx.State.PostSwapHands.ContainsKey))
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{
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foreach (var p in swappers)
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{
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var opponent = ReferenceEquals(p, ctx.A) ? ctx.B : ctx.A;
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var ready = opponent is IHasHandshakePhase
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&& ctx.State.PostSwapHands.TryGetValue(opponent, out var oppoHand)
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? ScriptedLifecycle.BuildReady(ctx.State.PostSwapHands[p], oppoHand)
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: ScriptedLifecycle.BuildReady(ctx.State.PostSwapHands[p]);
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routes.Add(new DispatchRoute(p, ready, false));
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}
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}
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return routes;
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}
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}
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