using SVSim.BattleNode.Protocol;

namespace SVSim.BattleNode.Sessions.Dispatch.Handlers;

internal sealed class TurnEndHandler : IFrameHandler
{
    public IReadOnlyList<DispatchRoute> Handle(FrameDispatchContext ctx)
    {
        // case 4: Bot — Judge to sender only (no real opponent; client flips back to its local AI).
        if (ctx.Type == BattleType.Bot && ctx.SenderPhase == BattleSessionPhase.AfterReady)
            return new[] { new DispatchRoute(ctx.From, BattleFrames.BuildJudgeBroadcast(), false) };

        // case 8: general AfterReady arm — matches (and consumes) for any non-Bot type once the
        // sender is AfterReady, even if it yields no routes (legacy `break;`).
        if (ctx.SenderPhase == BattleSessionPhase.AfterReady)
        {
            if (ctx.Type == BattleType.Pvp && ctx.BothAfterReady())
            {
                var te = BattleFrames.BuildTurnEndBroadcast();
                var jg = BattleFrames.BuildJudgeBroadcast();
                return new[]
                {
                    new DispatchRoute(ctx.From, te, false),
                    new DispatchRoute(ctx.Other, te, false),
                    new DispatchRoute(ctx.From, jg, false),
                    new DispatchRoute(ctx.Other, jg, false),
                };
            }
            if (ctx.Type == BattleType.Scripted)
                return new[] { new DispatchRoute(ctx.Other, ctx.Env, false) };

            return Array.Empty<DispatchRoute>(); // Pvp-not-both-ready → drop (Bot already returned above)
        }

        // case 11: scripted-bot TurnEnd whose sender has no handshake phase (test stub) → forward.
        if (ctx.IsScriptedBot(ctx.From))
            return new[] { new DispatchRoute(ctx.Other, ctx.Env, false) };

        return Array.Empty<DispatchRoute>();
    }
}