@page "/"
@inject FxService Fx
@inject IFaraonAI AI
@inject IJSRuntime JS

@if (IsInLobby || Engine == null)
{
    <Lobby OnStartGame="HandleStartGame" />
}
else
{
    <div id="game-table-container">
        <!-- Canvas pre časticové efekty (oheň, ľad, konfety) -->
        <canvas id="particle-canvas"></canvas>

        <!-- Horná lišta -->
        <header class="game-header">
            <div style="display: flex; align-items: center; gap: 10px;">
                <h1 class="game-title">FARAÓN</h1>
                @if (Engine.State.Rules.OlympicMode)
                {
                    <span style="background: linear-gradient(135deg, #f5b041, #d4ac0d); color: #1a1a1a; font-weight: 900; font-size: 0.78rem; padding: 2px 10px; border-radius: 12px; letter-spacing: 0.5px;">
                        🏅 KOLO #@Engine.State.RoundNumber
                    </span>
                }
            </div>
            <div class="turn-header-info">
                Ťah #@Engine.State.TurnCount &bull; Na rade:
                <span class="active-turn-header-player">
                    @Engine.State.CurrentPlayer.Avatar @Engine.State.CurrentPlayer.Name
                </span>
            </div>
            <div class="game-controls">
                <!-- Rýchly prepínač rýchlosti hry (5 úrovní) -->
                <button class="btn-game-icon btn-speed-control" title="Rýchlosť hry: @GetSpeedDescription(Engine.State.Rules.SpeedLevel) (Klikni pre zmenu)" @onclick="CycleSpeed">
                    @GetSpeedButtonText(Engine.State.Rules.SpeedLevel)
                </button>
                <!-- Rýchly prepínač balíčka kariet -->
                <button class="btn-game-icon" title="Zmeniť balíček kariet (@Engine.State.Rules.SelectedDeck)" @onclick="ToggleDeck">
                    @GetDeckIcon(Engine.State.Rules.SelectedDeck)
                </button>
                <button class="btn-game-icon" title="Stlmiť / Zapnúť zvuk" @onclick="ToggleMute">
                    @(IsMuted ? "🔇" : "🔊")
                </button>
                <button class="btn-game-icon" title="Návrat do Lobby" @onclick="ReturnToLobby">
                    🏠
                </button>
            </div>
        </header>

        <!-- Herný stôl -->
        <div class="poker-table-surface">
            <!-- Súperi na stole -->
            @foreach (var opp in GetOpponents())
            {
                var isOppFrozen = Engine.State.PendingSkip && Engine.State.CurrentPlayer == opp.Player;
                var canOppBeRevived = Engine.State.Rules.RedSevenRevives && Engine.State.LastFinishedPlayer == opp.Player && Engine.State.ReviveTurnsRemaining > 0;
                <PlayerSlot Player="@opp.Player"
                            IsCurrentTurn="@(Engine.State.CurrentPlayer == opp.Player)"
                            IsFrozen="@isOppFrozen"
                            CanBeRevived="@canOppBeRevived"
                            ReviveRoundsRemaining="@Engine.State.ReviveRoundsRemaining"
                            ReviveTurnsRemaining="@Engine.State.ReviveTurnsRemaining"
                            IsOlympicMode="@Engine.State.Rules.OlympicMode"
                            PositionClass="@opp.PositionClass" />
            }

            <!-- Stred stola: Lízací balíček a Odhadzovacia kôpka -->
            <div class="slot-center">
                <!-- Lízací balíček -->
                <div class="deck-card-container" @onclick="HandleDeckClick" title="Potiahnuť kartu">
                    <CardView IsBack="true" Deck="@Engine.State.Rules.SelectedDeck" CustomStyle="box-shadow: 0 10px 25px rgba(0,0,0,0.6);" />
                    <div class="deck-count-badge">
                        @Engine.State.DrawDeck.Count
                    </div>
                </div>

                <!-- Odhadzovacia kôpka -->
                <div class="discard-pile-container">
                    @if (Engine.State.TopCard != null)
                    {
                        <CardView Card="@Engine.State.TopCard"
                                  Deck="@Engine.State.Rules.SelectedDeck"
                                  CustomStyle="box-shadow: 0 10px 25px rgba(0,0,0,0.7);" />
                    }

                    <!-- Indikátor zmrazenia z Esa -->
                    @if (Engine.State.PendingSkip)
                    {
                        <div class="ace-freeze-badge">
                            ❄️ ESO: ZMRAZENIE!
                        </div>
                    }

                    <!-- Indikátor trestu zo sedmy -->
                    @if (Engine.State.PendingDrawCount > 0)
                    {
                        <div class="seven-penalty-badge">
                            🔥 +@Engine.State.PendingDrawCount Kariet!
                        </div>
                    }

                    <!-- Indikátor zvolenej farby z Horníka -->
                    @if (Engine.State.ActiveSuit.HasValue)
                    {
                        var dummy = new Card(Engine.State.ActiveSuit.Value, Rank.OverKnave);
                        <div class="active-suit-badge" style="color: @dummy.SuitColor;">
                            <span>Farba:</span>
                            <div style="width: 20px; height: 20px; display: inline-flex; vertical-align: middle;">
                                <MariasPip Suit="@Engine.State.ActiveSuit.Value" />
                            </div>
                            <span>@dummy.SuitName</span>
                        </div>
                    }

                    <!-- Indikátor Zeleného dolníka (univerzálna karta) -->
                    @if (Engine.State.TopCard != null && Engine.State.TopCard.IsGreenUnderKnave && Engine.State.Rules.GreenUnderKnaveMode == GreenUnderKnaveMode.UniversalWildcard)
                    {
                        <div class="green-wildcard-badge">
                            🍃 ZELENÝ DOLNÍK: Daj čokoľvek!
                        </div>
                    }
                </div>
            </div>

            <!-- Spodný slot: Aktívny hráč v zobrazení -->
            @{
                var isBottomFrozen = Engine.State.PendingSkip && IsViewingPlayerActiveTurn;
                var canBottomBeRevived = Engine.State.Rules.RedSevenRevives && Engine.State.LastFinishedPlayer == ViewingPlayer && Engine.State.ReviveTurnsRemaining > 0;
            }
            <div class="slot-bottom @(isBottomFrozen ? "frozen-slot" : (IsViewingPlayerActiveTurn ? "active-turn-slot" : ""))">
                <div class="avatar-badge @(isBottomFrozen ? "is-frozen" : (IsViewingPlayerActiveTurn ? "active-turn" : "")) @(ViewingPlayer.HasFinished ? "is-finished" : "") @(canBottomBeRevived && ViewingPlayer.HasFinished ? "can-be-revived" : "")"
                     style="margin-bottom: 8px;">
                    @if (isBottomFrozen && !ViewingPlayer.HasFinished && !ViewingPlayer.IsEliminated)
                    {
                        <div class="frozen-indicator-badge">
                            <span class="frozen-indicator-dot"></span>
                            <span class="frozen-indicator-text">@(ViewingPlayer.Type == PlayerType.Human ? "❄️ STOJÍŠ TOTO KOLO" : "❄️ ZMRAZENÝ")</span>
                        </div>
                    }
                    else if (IsViewingPlayerActiveTurn && !ViewingPlayer.HasFinished && !ViewingPlayer.IsEliminated)
                    {
                        <div class="turn-indicator-badge">
                            <span class="turn-indicator-dot"></span>
                            <span class="turn-indicator-text">@(ViewingPlayer.Type == PlayerType.Human ? "SI NA ŤAHU" : "NA ŤAHU")</span>
                        </div>
                    }

                    @if (ViewingPlayer.HasFinished)
                    {
                        <div class="badge-finished-pos">
                            @ViewingPlayer.FinishedPosition
                        </div>
                    }

                    <div style="display: flex; align-items: center; gap: 8px;">
                        <span class="avatar-icon">@ViewingPlayer.Avatar</span>
                        <span class="avatar-name">
                            @ViewingPlayer.Name
                            @if (ViewingPlayer.Type == PlayerType.AI)
                            {
                                <span style="font-size: 0.7rem; opacity: 0.8;">(AI)</span>
                            }
                        </span>
                        <span class="avatar-card-count">(@ViewingPlayer.Hand.Count @(ViewingPlayer.Hand.Count == 1 ? "karta" : (ViewingPlayer.Hand.Count < 5 ? "karty" : "kariet")))</span>
                        @if (Engine.State.Rules.OlympicMode)
                        {
                            <span style="font-size: 0.75rem; color: var(--gold); background: rgba(0,0,0,0.4); padding: 2px 8px; border-radius: 10px; border: 1px solid rgba(245, 176, 65, 0.4);">
                                🏅 @ViewingPlayer.OlympicCardsCount @(ViewingPlayer.OlympicCardsCount == 1 ? "karta" : (ViewingPlayer.OlympicCardsCount < 5 ? "karty" : "kariet"))
                            </span>
                        }
                    </div>

                    @if (isBottomFrozen && !ViewingPlayer.HasFinished && !ViewingPlayer.IsEliminated)
                    {
                        <div class="icicles-row">
                            <span class="icicle"></span>
                            <span class="icicle"></span>
                            <span class="icicle"></span>
                            <span class="icicle"></span>
                            <span class="icicle"></span>
                            <span class="icicle"></span>
                            <span class="icicle"></span>
                        </div>
                    }

                    @if (canBottomBeRevived && ViewingPlayer.HasFinished)
                    {
                        <div class="revive-countdown-badge" title="Tento hráč môže byť vrátený do hry Červenou sedmou!">
                            <span class="heartbeat-icon">❤️</span>
                            <span>
                                @(Engine.State.ReviveRoundsRemaining > 1 ? $"Oživenie: {Engine.State.ReviveRoundsRemaining} kolá" : (Engine.State.ReviveTurnsRemaining <= 1 ? "Oživenie: 1 ťah" : "Oživenie: 1 kolo"))
                            </span>
                        </div>
                    }
                </div>

                <!-- Interaktívna ruka hráča -->
                @if (!ViewingPlayer.IsEliminated)
                {
                    <PlayerHandView Player="@ViewingPlayer"
                                    Deck="@Engine.State.Rules.SelectedDeck"
                                    IsMyTurn="@IsViewingPlayerTurn"
                                    CanPlayCardFunc="@(c => Engine.CanPlayCard(ViewingPlayer, c))"
                                    CanPlayCardsFunc="@(cards => Engine.CanPlayCards(ViewingPlayer, cards))"
                                    OnPlayCards="HandlePlayCards" />
                }
                else
                {
                    <div style="padding: 20px; color: #ef4444; font-weight: 800; font-size: 1.1rem; text-shadow: 0 2px 8px rgba(0,0,0,0.8);">
                        ☠️ Bol si vyradený z Olympijského turnaja. Sleduj zápas až do konca!
                    </div>
                }
            </div>
        </div>

        <!-- Akčné tlačidlá pre aktívneho živého hráča -->
        @if (IsViewingPlayerTurn && Engine.State.TurnState == TurnState.Playing && !ViewingPlayer.IsEliminated)
        {
            <div style="position: absolute; bottom: 18px; right: 24px; z-index: 60; display: flex; gap: 10px;">
                @if (CheckFourOfAKindRank(ViewingPlayer) is Rank burnRank)
                {
                    <button class="btn-primary-glow" style="background: linear-gradient(135deg, #ff4500, #ff8c00); box-shadow: 0 0 20px #ff4500;"
                            @onclick="() => HandleBurn(burnRank)">
                        💥 Spáliť 4x @burnRank!
                    </button>
                }

                <button class="btn-pill" style="background: rgba(0,0,0,0.6); border: 2px solid var(--gold);"
                        @onclick="HandleDeckClick">
                    @if (Engine.State.PendingDrawCount > 0)
                    {
                        <span>Ťahať +@Engine.State.PendingDrawCount 🃏</span>
                    }
                    else if (Engine.State.PendingSkip)
                    {
                        <span>Stáť toto kolo ❄️</span>
                    }
                    else
                    {
                        <span>Líznúť kartu 📥</span>
                    }
                </button>
            </div>
        }

        <!-- Toast / Ticker poslednej akcie -->
        @if (!string.IsNullOrEmpty(LastEventMessage))
        {
            <div class="event-ticker">
                @LastEventMessage
            </div>
        }

        <!-- Modálne okná -->
        @if (Engine.State.TurnState == TurnState.SelectingSuit && Engine.State.PendingHornikPlayer == ViewingPlayer)
        {
            <SuitPickerModal OnSuitSelected="HandleSuitSelected" />
        }

        @if (Engine.State.TurnState == TurnState.PassScreen)
        {
            <PassScreenModal Player="@Engine.State.CurrentPlayer" OnContinue="HandlePassContinue" />
        }

        @if (Engine.State.TurnState == TurnState.RoundOver)
        {
            <RoundOverModal RoundNumber="@Engine.State.RoundNumber"
                            RoundLoser="@Engine.State.RoundLoser"
                            Players="@Engine.State.Players"
                            OnNextRound="HandleStartNextRound"
                            OnBackToLobby="ReturnToLobby" />
        }

        @if (Engine.State.IsGameOver)
        {
            <GameOverModal Players="@Engine.State.Players"
                           IsOlympicMode="@Engine.State.Rules.OlympicMode"
                           MatchWinner="@Engine.State.MatchWinner"
                           OnPlayAgain="HandlePlayAgain"
                           OnBackToLobby="ReturnToLobby" />
        }
    </div>
}

@code {
    private bool IsInLobby = true;
    private bool IsMuted = false;
    private GameEngine? Engine;
    private string LastEventMessage = "";
    private System.Threading.CancellationTokenSource? _aiCts;

    private List<Player> ConfiguredPlayers = new();
    private RuleOptions ConfiguredRules = new();
    private Player? _previousTurnPlayer;

    private Player ViewingPlayer
    {
        get
        {
            if (Engine == null || Engine.State.Players.Count == 0) return new Player();

            // Ak je Pass & Play a aktuálny hráč je človek, zobrazujeme jeho ruku
            if (Engine.State.CurrentPlayer.Type == PlayerType.Human)
            {
                return Engine.State.CurrentPlayer;
            }

            // Inak primárne prvého živého človeka v hre
            var firstHuman = Engine.State.Players.FirstOrDefault(p => p.Type == PlayerType.Human);
            if (firstHuman != null) return firstHuman;

            // Ak sú všetci hráči AI, spodný hráč je PEVNE prvý hráč (Players[0]), aby sa stôl a rozmiestnenie nemenili
            return Engine.State.Players[0];
        }
    }

    private bool IsViewingPlayerActiveTurn =>
        Engine != null &&
        Engine.State.TurnState == TurnState.Playing &&
        Engine.State.CurrentPlayer == ViewingPlayer;

    private bool IsViewingPlayerTurn =>
        IsViewingPlayerActiveTurn &&
        ViewingPlayer.Type == PlayerType.Human;

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        if (firstRender)
        {
            await Fx.InitParticlesAsync();
        }
    }

    private void HandleStartGame((List<Player> players, RuleOptions rules) setup)
    {
        ConfiguredPlayers = setup.players;
        ConfiguredRules = setup.rules;

        StartNewGame();
    }

    private void StartNewGame()
    {
        // Klony hráčov pre čistú hru
        var gamePlayers = ConfiguredPlayers.Select(p => new Player(p.Name, p.Type, p.Avatar, p.Difficulty)).ToList();

        Engine = new GameEngine();
        Engine.OnGameEvent += HandleGameEvent;
        Engine.StartGame(gamePlayers, ConfiguredRules);

        _previousTurnPlayer = Engine.State.CurrentPlayer;
        _ = Fx.SetSpeedLevelAsync(Engine.State.Rules.SpeedLevel);
        IsInLobby = false;
        LastEventMessage = "Hra začala! Veľa šťastia.";

        StateHasChanged();
        CheckTriggerAI();
    }

    private void HandleGameEvent(GameEvent e)
    {
        LastEventMessage = e.Message;

        _ = InvokeAsync(async () =>
        {
            switch (e.Type)
            {
                case GameEventType.CardPlayed:
                    await Fx.PlayCardSnapAsync();
                    break;
                case GameEventType.CardDrawn:
                    await Fx.PlayCardDrawAsync();
                    break;
                case GameEventType.SevenStacked:
                    await Fx.PlaySevenStackAsync(Math.Max(1, e.ExtraData / 3));
                    await Fx.TriggerDopamineBannerAsync($"🔥 +{e.ExtraData} KARIET!", "Trestná reťaz sediem", "triple");
                    break;
                case GameEventType.SevenCanceled:
                    await Fx.PlayLeafShieldAsync();
                    await Fx.TriggerDopamineBannerAsync("🍃 TREST ZRUŠENÝ!", $"{e.SourcePlayer?.Name ?? "Hráč"} zrušil trest Zeleným dolníkom!", "triple");
                    break;
                case GameEventType.AceSkipped:
                    if (e.Message.Contains("stojí toto kolo"))
                    {
                        if (e.SourcePlayer != null)
                        {
                            await Fx.TriggerIceShatterAsync(GetPlayerPosition(e.SourcePlayer));
                        }
                    }
                    else
                    {
                        await Fx.TriggerFreezeEffectAsync();
                    }
                    break;
                case GameEventType.AceCountered:
                    if (e.SourcePlayer != null)
                    {
                        await Fx.TriggerIceShatterAsync(GetPlayerPosition(e.SourcePlayer));
                        await Fx.TriggerDopamineBannerAsync("⚡ ROZMRAZENÝ!", $"{e.SourcePlayer.Name} prebil Eso vlastným Esom!", "revive");
                    }
                    break;
                case GameEventType.PlayerRevived:
                    await Fx.TriggerReviveEffectAsync(e.TargetPlayer?.Name ?? e.SourcePlayer?.Name ?? "Hráč");
                    break;
                case GameEventType.SuitChanged:
                    await Fx.PlayHornikChimeAsync();
                    break;
                case GameEventType.CardsBurned:
                    await Fx.PlayBurnExplosionAsync();
                    break;
                case GameEventType.PlayerFinished:
                case GameEventType.MatchWon:
                case GameEventType.GameOver:
                    await Fx.TriggerJackpotWinAsync(e.SourcePlayer?.Name ?? "Víťaz");
                    break;
            }

            if (Engine != null && Engine.State.CurrentPlayer.Hand.Count == 1 && !Engine.State.CurrentPlayer.HasFinished)
            {
                await Fx.PlayHeartbeatAsync();
            }

            await CheckTurnTransitionAsync();
            StateHasChanged();
        });
    }

    private async Task CheckTurnTransitionAsync()
    {
        if (Engine == null || Engine.State.Players.Count == 0 || Engine.State.IsGameOver) return;
        var current = Engine.State.CurrentPlayer;
        if (_previousTurnPlayer != null && _previousTurnPlayer != current)
        {
            var prev = _previousTurnPlayer;
            _previousTurnPlayer = current;
            await Fx.AnimateTurnTransitionAsync(GetPlayerPosition(prev), GetPlayerPosition(current));
        }
        else
        {
            _previousTurnPlayer = current;
        }
    }

    private string GetPlayerPosition(Player player)
    {
        if (player == ViewingPlayer) return "bottom";
        var opp = GetOpponents().FirstOrDefault(o => o.Player == player);
        if (!string.IsNullOrEmpty(opp.PositionClass))
        {
            return opp.PositionClass.Replace("slot-", "");
        }
        return "top";
    }

    private static readonly string[] AvailableDecks = new[] { "original", "janosik", "spongebob", "cyberpunk", "fantasy", "egypt", "pets", "pixel" };

    private int MultiCardDelayMs => Engine?.State.Rules.SpeedLevel switch
    {
        1 => 130,
        2 => 105,
        4 => 50,
        5 => 25,
        _ => 80
    };

    private async Task CycleSpeed()
    {
        if (Engine == null) return;
        int next = (Engine.State.Rules.SpeedLevel % 5) + 1;
        Engine.State.Rules.SpeedLevel = next;
        await Fx.SetSpeedLevelAsync(next);
        StateHasChanged();
    }

    private string GetSpeedButtonText(int level) => level switch
    {
        1 => "🐢 0.5x",
        2 => "🚶 0.75x",
        3 => "⚡ 1x",
        4 => "🔥 1.5x",
        5 => "🚀 2.5x",
        _ => "⚡ 1x"
    };

    private string GetSpeedDescription(int level) => level switch
    {
        1 => "0.5x (Pomalá)",
        2 => "0.75x (Pokojná)",
        3 => "1x (Normálna - stredná)",
        4 => "1.5x (Rýchla)",
        5 => "2.5x (Turbo / Blesková)",
        _ => "1x (Normálna)"
    };

    private void ToggleDeck()
    {
        if (Engine == null) return;
        int currentIdx = Array.IndexOf(AvailableDecks, Engine.State.Rules.SelectedDeck);
        int nextIdx = (currentIdx + 1) % AvailableDecks.Length;
        Engine.State.Rules.SelectedDeck = AvailableDecks[nextIdx];
        StateHasChanged();
    }

    private string GetDeckIcon(string deck) => deck switch
    {
        "janosik" => "🪓",
        "spongebob" => "🧽",
        "cyberpunk" => "⚡",
        "fantasy" => "🐉",
        "egypt" => "⚔️",
        "pets" => "🐱",
        "pixel" => "🕹️",
        _ => "🎴"
    };

    private async Task HandlePlayCards(List<Card> cards)
    {
        if (Engine == null || cards.Count == 0) return;
        string pos = GetPlayerPosition(ViewingPlayer);
        string deck = Engine.State.Rules.SelectedDeck;

        if (cards.Count == 2)
        {
            _ = Fx.TriggerComboSlamAsync(2, "⚡ DVOJIČKA!");
        }
        else if (cards.Count == 3)
        {
            _ = Fx.TriggerComboSlamAsync(3, "🔥 TROJITÝ ÚDER!");
        }
        else if (cards.Count >= 4)
        {
            _ = Fx.TriggerComboSlamAsync(4, "👑 KVADRA / MEGA COMBO!");
        }

        for (int i = 0; i < cards.Count; i++)
        {
            if (i == cards.Count - 1)
            {
                await Fx.AnimateCardPlayAsync(pos, cards[i], deck);
            }
            else
            {
                _ = Fx.AnimateCardPlayAsync(pos, cards[i], deck);
                await Task.Delay(MultiCardDelayMs);
            }
        }

        Engine.PlayCards(ViewingPlayer, cards);
        StateHasChanged();
        CheckTriggerAI();
    }

    private async Task HandleDeckClick()
    {
        if (Engine == null || !IsViewingPlayerTurn) return;
        string pos = GetPlayerPosition(ViewingPlayer);
        string deck = Engine.State.Rules.SelectedDeck;

        if (Engine.State.PendingDrawCount > 0)
        {
            int drawCount = Engine.State.PendingDrawCount;
            int staggerDelay = Math.Max(25, (int)(MultiCardDelayMs * 0.75));
            for (int i = 0; i < drawCount; i++)
            {
                if (i == drawCount - 1)
                {
                    await Fx.AnimateCardDrawAsync(pos, deck);
                }
                else
                {
                    _ = Fx.AnimateCardDrawAsync(pos, deck);
                    await Task.Delay(staggerDelay);
                }
            }
        }
        else if (!Engine.State.PendingSkip)
        {
            await Fx.AnimateCardDrawAsync(pos, deck);
        }

        Engine.DrawOrAcknowledge(ViewingPlayer);
        StateHasChanged();
        CheckTriggerAI();
    }

    private void HandleSuitSelected(Suit suit)
    {
        if (Engine == null) return;
        Engine.ChooseSuit(ViewingPlayer, suit);
        StateHasChanged();
        CheckTriggerAI();
    }

    private void HandlePassContinue()
    {
        if (Engine == null) return;
        Engine.ContinueFromPassScreen();
        StateHasChanged();
        CheckTriggerAI();
    }

    private void HandleStartNextRound()
    {
        if (Engine == null) return;
        Engine.StartNextRound();
        StateHasChanged();
        CheckTriggerAI();
    }

    private async Task HandleBurn(Rank rank)
    {
        if (Engine == null) return;
        var cards = ViewingPlayer.Hand.Where(c => c.Rank == rank).ToList();
        if (cards.Count == 4)
        {
            string pos = GetPlayerPosition(ViewingPlayer);
            string deck = Engine.State.Rules.SelectedDeck;
            for (int i = 0; i < cards.Count; i++)
            {
                if (i == cards.Count - 1)
                {
                    await Fx.AnimateCardPlayAsync(pos, cards[i], deck);
                }
                else
                {
                    _ = Fx.AnimateCardPlayAsync(pos, cards[i], deck);
                    await Task.Delay(MultiCardDelayMs);
                }
            }
            Engine.BurnCards(ViewingPlayer, cards);
            StateHasChanged();
            CheckTriggerAI();
        }
    }

    private Rank? CheckFourOfAKindRank(Player player)
    {
        if (Engine == null || !Engine.State.Rules.FourOfAKindBurns) return null;
        var group = player.Hand.GroupBy(c => c.Rank).FirstOrDefault(g => g.Count() == 4);
        return group?.Key;
    }

    private void CheckTriggerAI()
    {
        if (Engine == null || Engine.State.IsGameOver) return;

        if (Engine.State.TurnState == TurnState.Playing && Engine.State.CurrentPlayer.Type == PlayerType.AI)
        {
            _aiCts?.Cancel();
            _aiCts = new System.Threading.CancellationTokenSource();
            var token = _aiCts.Token;

            _ = Task.Run(async () =>
            {
                try
                {
                    await Task.Delay(Engine.State.Rules.AIDelayMs, token);
                    if (token.IsCancellationRequested || Engine == null) return;

                    var aiPlayer = Engine.State.CurrentPlayer;
                    if (aiPlayer.Type != PlayerType.AI) return;

                    var decision = AI.MakeDecision(Engine.State, aiPlayer);

                    await InvokeAsync(async () =>
                    {
                        string pos = GetPlayerPosition(aiPlayer);
                        string deck = Engine.State.Rules.SelectedDeck;

                        if (decision.Type == AIDecisionType.PlayCard)
                        {
                            var cardsToPlay = decision.Cards ?? (decision.Card != null ? new List<Card> { decision.Card } : new List<Card>());
                            if (cardsToPlay.Count > 0)
                            {
                                if (cardsToPlay.Count == 2)
                                {
                                    _ = Fx.TriggerComboSlamAsync(2, $"⚡ {aiPlayer.Name}: DVOJIČKA!");
                                }
                                else if (cardsToPlay.Count == 3)
                                {
                                    _ = Fx.TriggerComboSlamAsync(3, $"🔥 {aiPlayer.Name}: TROJITÝ ÚDER!");
                                }
                                else if (cardsToPlay.Count >= 4)
                                {
                                    _ = Fx.TriggerComboSlamAsync(4, $"👑 {aiPlayer.Name}: KVADRA!");
                                }

                                for (int i = 0; i < cardsToPlay.Count; i++)
                                {
                                    if (i == cardsToPlay.Count - 1)
                                    {
                                        await Fx.AnimateCardPlayAsync(pos, cardsToPlay[i], deck);
                                    }
                                    else
                                    {
                                        _ = Fx.AnimateCardPlayAsync(pos, cardsToPlay[i], deck);
                                        await Task.Delay(MultiCardDelayMs);
                                    }
                                }
                                Engine.PlayCards(aiPlayer, cardsToPlay, decision.ChosenSuit);
                            }
                        }
                        else if (decision.Type == AIDecisionType.BurnCards && decision.Cards != null)
                        {
                            for (int i = 0; i < decision.Cards.Count; i++)
                            {
                                if (i == decision.Cards.Count - 1)
                                {
                                    await Fx.AnimateCardPlayAsync(pos, decision.Cards[i], deck);
                                }
                                else
                                {
                                    _ = Fx.AnimateCardPlayAsync(pos, decision.Cards[i], deck);
                                    await Task.Delay(MultiCardDelayMs);
                                }
                            }
                            Engine.BurnCards(aiPlayer, decision.Cards);
                        }
                        else
                        {
                            if (Engine.State.PendingDrawCount > 0)
                            {
                                int drawCount = Engine.State.PendingDrawCount;
                                int staggerDelay = Math.Max(25, (int)(MultiCardDelayMs * 0.75));
                                for (int i = 0; i < drawCount; i++)
                                {
                                    if (i == drawCount - 1)
                                    {
                                        await Fx.AnimateCardDrawAsync(pos, deck);
                                    }
                                    else
                                    {
                                        _ = Fx.AnimateCardDrawAsync(pos, deck);
                                        await Task.Delay(staggerDelay);
                                    }
                                }
                            }
                            else if (!Engine.State.PendingSkip)
                            {
                                await Fx.AnimateCardDrawAsync(pos, deck);
                            }
                            Engine.DrawOrAcknowledge(aiPlayer);
                        }

                        StateHasChanged();
                        CheckTriggerAI();
                    });
                }
                catch (TaskCanceledException) { }
            }, token);
        }
    }

    private IEnumerable<(Player Player, string PositionClass)> GetOpponents()
    {
        if (Engine == null) return Enumerable.Empty<(Player, string)>();

        var opponents = Engine.State.Players.Where(p => p != ViewingPlayer).ToList();
        var result = new List<(Player, string)>();

        if (opponents.Count == 1)
        {
            result.Add((opponents[0], "slot-top"));
        }
        else if (opponents.Count == 2)
        {
            result.Add((opponents[0], "slot-left"));
            result.Add((opponents[1], "slot-right"));
        }
        else if (opponents.Count >= 3)
        {
            result.Add((opponents[0], "slot-left"));
            result.Add((opponents[1], "slot-top"));
            result.Add((opponents[2], "slot-right"));
        }

        return result;
    }

    private async Task ToggleMute()
    {
        IsMuted = await Fx.ToggleMuteAsync();
    }

    private void HandlePlayAgain()
    {
        StartNewGame();
    }

    private void ReturnToLobby()
    {
        _aiCts?.Cancel();
        IsInLobby = true;
        Engine = null;
    }
}