using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.UI;
using Vanguard.Api;
using Vanguard.Api.Contracts;
using Vanguard.Battle;
using Vanguard.Board3D;
using Vanguard.Meta;
using Vanguard.Shared.Protocol;

namespace Vanguard.UI
{
    /// <summary>
    /// Серый боевой экран: доска, рука, часы и кнопки всех легальных интентов.
    /// Красоту и анимации добавим поверх этой рабочей логики.
    /// </summary>
    public sealed class BattleView
    {
        private static readonly Color Background = new Color(0.035f, 0.045f, 0.065f, 1f);
        private static readonly Color Panel = new Color(0.07f, 0.085f, 0.115f, 1f);
        private static readonly Color Card = new Color(0.10f, 0.13f, 0.18f, 1f);
        private static readonly Color Muted = new Color(0.62f, 0.68f, 0.82f);
        private static readonly Color Accent = new Color(0.20f, 0.42f, 0.78f, 1f);

        private readonly MetaService _meta;
        private readonly Action _onExit;
        private readonly Dictionary<string, CardCatalogItemDto> _catalog =
            new Dictionary<string, CardCatalogItemDto>(StringComparer.Ordinal);
        private bool _catalogLoading;

        private readonly RectTransform _root;
        private RectTransform _intents;
        private readonly Text _topInfo;
        private readonly Text _clock;
        private readonly Text _status;
        private readonly Button _concede;
        private readonly Text _concedeLabel;
        private readonly Button _reconnect;
        private readonly RectTransform _result;
        private RectTransform _logContent;
        private Text _resultText;
        private Text _feedback;
        private Image _flash;
        private float _feedbackTime;
        private float _feedbackDuration;
        private Color _feedbackColor;
        private readonly Queue<FeedbackStep> _feedbackQueue = new Queue<FeedbackStep>();
        private Button _skipFeedback;
        private bool _feedbackPlaying;
        private readonly List<string> _logLines = new List<string>();

        private GameConnection _connection;
        private CancellationTokenSource _cts;
        private MatchConnectionInfo _info;
        private MatchView _view;
        private bool _connecting;
        private bool _sending;
        private bool _snapshotPending;
        private bool _finished;
        private bool _confirmConcede;
        private bool _showAllIntents;
        private float _confirmDeadline;
        private long _clockServerMs;
        private long _clockReceivedMs;
        private readonly List<IntentPayload> _pendingIntents = new List<IntentPayload>();
        private int _pendingBoosterSlot = -1;
        private int? _triggerPowerSlot;
        private readonly HashSet<int> _mulliganSelected = new HashSet<int>();
        private bool _mulliganUsed;
        private int _abilityDamageIndex = -1;

        private readonly HashSet<BoardSlotKey> _highlightSlots = new HashSet<BoardSlotKey>();
        private GameBoard3D _board3D;
        private RectTransform _soulOverlay;
        private RectTransform _soulContent;
        private Text _soulTitle;
        private Text _selfStatsText;
        private Text _opponentStatsText;

        public BattleView(Transform parent, MetaService meta, Action onExit)
        {
            _meta = meta;
            _onExit = onExit;

            _root = UiKit.CreatePanel(parent, "BattleScreen", Background);
            var rootImage = _root.GetComponent<Image>();
            if (rootImage != null)
            {
                rootImage.color = Color.clear;
                rootImage.raycastTarget = false;
            }

            var top = UiKit.CreatePanel(_root, "TopBar", Panel);
            top.anchorMin = new Vector2(0f, 1f);
            top.anchorMax = new Vector2(1f, 1f);
            top.pivot = new Vector2(0.5f, 1f);
            top.anchoredPosition = Vector2.zero;
            top.sizeDelta = new Vector2(0f, 88f);
            UiKit.AddHorizontalLayout(top, 20, 14);

            var title = UiKit.CreateText(top, "Title", "Бой", 32, Color.white, TextAnchor.MiddleLeft);
            title.fontStyle = FontStyle.Bold;
            UiKit.SetPreferredHeight(title, 46f, 0f);

            _topInfo = UiKit.CreateText(
                top, "Match", string.Empty, 17, Muted, TextAnchor.MiddleLeft);
            UiKit.MakeLiteral(_topInfo);
            UiKit.SetPreferredHeight(_topInfo, 38f);

            _clock = UiKit.CreateText(
                top, "Clock", "—", 22, Color.white, TextAnchor.MiddleRight);
            UiKit.SetPreferredHeight(_clock, 44f, 0f);

            _concede = UiKit.CreateButton(top, "Concede", "Сдаться", OnConcedeClicked, 18);
            _concedeLabel = _concede.GetComponentInChildren<Text>();
            UiKit.SetPreferredHeight(_concede, 44f, 0f);

            var right = UiKit.CreatePanel(_root, "IntentPanel", Panel);
            right.anchorMin = new Vector2(1f, 0f);
            right.anchorMax = new Vector2(1f, 1f);
            right.pivot = new Vector2(1f, 0.5f);
            right.offsetMin = new Vector2(-456f, 28f);
            right.offsetMax = new Vector2(-36f, -108f);
            UiKit.AddVerticalLayout(right, 14, 10);

            var actionsTitle = UiKit.CreateText(
                right, "ActionsTitle", "Действия", 24, Color.white, TextAnchor.MiddleLeft);
            actionsTitle.fontStyle = FontStyle.Bold;
            UiKit.SetPreferredHeight(actionsTitle, 32f);

            var scroll = UiKit.CreateScrollView(right, "IntentScroll", out _intents, 6f);
            var scrollElement = scroll.gameObject.AddComponent<LayoutElement>();
            scrollElement.flexibleHeight = 1f;
            scrollElement.minHeight = 200f;

            _status = UiKit.CreateText(
                right, "Status", string.Empty, 16, Muted, TextAnchor.UpperLeft);
            _status.horizontalOverflow = HorizontalWrapMode.Wrap;
            UiKit.SetPreferredHeight(_status, 74f);

            _skipFeedback = UiKit.CreateButton(
                right, "SkipFeedback", "Пропустить анимации", SkipFeedback, 15);
            UiKit.SetPreferredHeight(_skipFeedback, 38f);
            _skipFeedback.gameObject.SetActive(false);

            var logTitle = UiKit.CreateText(
                right, "LogTitle", "Журнал", 16, new Color(0.72f, 0.80f, 0.94f), TextAnchor.MiddleLeft);
            logTitle.fontStyle = FontStyle.Bold;
            UiKit.SetPreferredHeight(logTitle, 22f);

            var logScroll = UiKit.CreateScrollView(right, "LogScroll", out _logContent, 3f);
            var logElement = logScroll.gameObject.AddComponent<LayoutElement>();
            logElement.preferredHeight = 142f;
            logElement.minHeight = 80f;

            _reconnect = UiKit.CreateButton(right, "Reconnect", "Переподключиться", OnReconnectClicked, 18);
            UiKit.SetPreferredHeight(_reconnect, 46f);
            _reconnect.gameObject.SetActive(false);

            _result = BuildResultPanel(_root);
            _result.gameObject.SetActive(false);

            _flash = UiKit.CreatePanel(_root, "BattleFlash", Color.clear).GetComponent<Image>();
            _flash.raycastTarget = false;
            _flash.gameObject.SetActive(false);

            _feedback = UiKit.CreateText(
                _root, "BattleFeedback", string.Empty, 44,
                Color.white, TextAnchor.MiddleCenter);
            _feedback.fontStyle = FontStyle.Bold;
            _feedback.raycastTarget = false;
            var feedbackRect = _feedback.rectTransform;
            feedbackRect.anchorMin = new Vector2(0.5f, 0.5f);
            feedbackRect.anchorMax = new Vector2(0.5f, 0.5f);
            feedbackRect.pivot = new Vector2(0.5f, 0.5f);
            feedbackRect.sizeDelta = new Vector2(900f, 120f);
            feedbackRect.anchoredPosition = new Vector2(0f, 130f);
            _feedback.gameObject.SetActive(false);

            BuildSoulOverlay();
            BuildStatsOverlays();

            _board3D = GameBoard3D.Create(null, PlaymatLayoutConfig.Default);
            _board3D.ArtProvider = ResolveBoardArt;
            _board3D.CardClicked += OnBoard3DCardClicked;
            _board3D.SlotClicked += OnBoard3DSlotClicked;
            _board3D.CardDropped += OnBoard3DCardDropped;
            _board3D.PileClicked += OnBoard3DPileClicked;
            _board3D.PileRightClicked += OnBoard3DPileRightClicked;
            _board3D.SetVisible(false);

            _root.gameObject.SetActive(false);
        }

        public void Show(MatchConnectionInfo info)
        {
            _info = info;
            _view = null;
            _finished = false;
            _confirmConcede = false;
            _concedeLabel.text = "Сдаться";
            _concede.interactable = true;
            _reconnect.gameObject.SetActive(false);
            _result.gameObject.SetActive(false);
            _pendingIntents.Clear();
            _highlightSlots.Clear();
            _mulliganSelected.Clear();
            _mulliganUsed = false;
            _abilityDamageIndex = -1;
            _pendingBoosterSlot = -1;
            _triggerPowerSlot = null;
            _showAllIntents = false;
            _logLines.Clear();
            RebuildLog();
            _feedbackQueue.Clear();
            _feedbackPlaying = false;
            _feedbackTime = 0f;
            _feedback.gameObject.SetActive(false);
            _flash.gameObject.SetActive(false);
            _skipFeedback.gameObject.SetActive(false);
            _highlightSlots.Clear();
            _board3D?.Clear();
            _board3D?.SetVisible(true);
            if (_soulOverlay != null)
                _soulOverlay.gameObject.SetActive(false);
            _topInfo.text = (info.DeckName ?? string.Empty) + "   ·   " + info.MatchId;
            if (_selfStatsText != null)
                _selfStatsText.text = string.Empty;
            if (_opponentStatsText != null)
                _opponentStatsText.text = string.Empty;
            SetStatus("Подключаемся к матчу…", Muted);
            _root.gameObject.SetActive(true);
            _ = LoadCatalogAsync();
            _ = ConnectAsync();
        }

        public void Hide()
        {
            _cts?.Cancel();
            _cts?.Dispose();
            _cts = null;

            if (_connection != null)
            {
                var connection = _connection;
                _connection = null;
                _ = connection.DisposeAsync().AsTask();
            }

            _root.gameObject.SetActive(false);
            _result.gameObject.SetActive(false);
            _feedback.gameObject.SetActive(false);
            _flash.gameObject.SetActive(false);
            _skipFeedback.gameObject.SetActive(false);
            if (_soulOverlay != null)
                _soulOverlay.gameObject.SetActive(false);
            _board3D?.SetVisible(false);
            _view = null;
        }

        public void Tick()
        {
            if (_confirmConcede && Time.unscaledTime > _confirmDeadline)
            {
                _confirmConcede = false;
                _concedeLabel.text = "Сдаться";
            }

            UpdateClock();
            UpdateFeedback();
        }

        private void ShowFeedback(string text, Color color, float duration = 1.25f, bool flash = false)
        {
            _feedbackQueue.Enqueue(new FeedbackStep(text, color, duration, flash));
            if (!_feedbackPlaying)
                StartNextFeedback();
        }

        private void StartNextFeedback()
        {
            if (_feedbackQueue.Count == 0)
            {
                _feedbackPlaying = false;
                _skipFeedback.gameObject.SetActive(false);
                return;
            }

            var step = _feedbackQueue.Dequeue();
            _feedbackPlaying = true;
            _feedback.text = step.Text;
            _feedbackColor = step.Color;
            _feedbackDuration = step.Duration;
            _feedbackTime = step.Duration;
            _feedback.gameObject.SetActive(true);
            _feedback.rectTransform.localScale = Vector3.one * 1.12f;
            _skipFeedback.gameObject.SetActive(true);

            if (step.Flash)
            {
                _flash.gameObject.SetActive(true);
                _flash.color = new Color(step.Color.r, step.Color.g, step.Color.b, 0.22f);
            }
        }

        private void UpdateFeedback()
        {
            if (!_feedbackPlaying)
                return;

            _feedbackTime -= Time.unscaledDeltaTime;
            var t = Mathf.Clamp01(_feedbackTime / Mathf.Max(0.01f, _feedbackDuration));
            var alpha = Mathf.Clamp01(t * 1.8f);
            _feedback.color = new Color(_feedbackColor.r, _feedbackColor.g, _feedbackColor.b, alpha);
            _feedback.rectTransform.localScale = Vector3.one * Mathf.Lerp(1f, 1.12f, t);

            if (_flash != null && _flash.gameObject.activeSelf)
                _flash.color = new Color(_feedbackColor.r, _feedbackColor.g, _feedbackColor.b, alpha * 0.22f);

            if (_feedbackTime > 0f)
                return;

            _feedback.gameObject.SetActive(false);
            if (_flash != null)
                _flash.gameObject.SetActive(false);
            StartNextFeedback();
        }

        private void SkipFeedback()
        {
            _feedbackQueue.Clear();
            _feedbackPlaying = false;
            _feedbackTime = 0f;
            _feedback.gameObject.SetActive(false);
            _flash.gameObject.SetActive(false);
            _skipFeedback.gameObject.SetActive(false);
        }

        private readonly struct FeedbackStep
        {
            public FeedbackStep(string text, Color color, float duration, bool flash)
            {
                Text = text;
                Color = color;
                Duration = duration;
                Flash = flash;
            }

            public string Text { get; }
            public Color Color { get; }
            public float Duration { get; }
            public bool Flash { get; }
        }

        private RectTransform BuildResultPanel(Transform parent)
        {
            var overlay = UiKit.CreatePanel(parent, "BattleResult", new Color(0f, 0f, 0f, 0.75f));
            var card = UiKit.CreateCenteredCard(
                overlay, "ResultCard", new Vector2(640f, 330f),
                new Color(0.08f, 0.10f, 0.14f, 1f));
            UiKit.AddVerticalLayout(card, 32, 14);

            var title = UiKit.CreateText(card, "Title", "Матч завершён", 32, Color.white);
            title.fontStyle = FontStyle.Bold;
            UiKit.SetPreferredHeight(title, 48f);

            _resultText = UiKit.CreateText(card, "Text", string.Empty, 22, Muted);
            UiKit.SetPreferredHeight(_resultText, 90f);

            var exit = UiKit.CreateButton(card, "Exit", "В меню", OnExitClicked, 21);
            UiKit.SetPreferredHeight(exit, 52f);

            return overlay;
        }

        private async Task LoadCatalogAsync()
        {
            if (_catalogLoading || _catalog.Count > 0)
                return;

            _catalogLoading = true;
            try
            {
                var items = await _meta.GetCatalogAsync();
                foreach (var item in items)
                    _catalog[item.PrintingId] = item;

                if (_root.gameObject.activeSelf && _view != null)
                    Render();
            }
            catch (Exception exception)
            {
                Debug.LogWarning("Battle catalog load failed: " + exception.Message);
            }
            finally
            {
                _catalogLoading = false;
            }
        }

        private async Task ConnectAsync()
        {
            if (_connecting || _info == null)
                return;

            _connecting = true;
            _reconnect.gameObject.SetActive(false);
            _cts?.Cancel();
            _cts?.Dispose();
            _cts = new CancellationTokenSource();

            try
            {
                if (_connection != null)
                {
                    await _connection.DisposeAsync();
                    _connection = null;
                }

                var connection = new GameConnection();
                _connection = connection;
                connection.HelloReceived += OnHello;
                connection.SnapshotReceived += OnSnapshot;
                connection.EventsReceived += OnEvents;
                connection.ClockReceived += OnClock;
                connection.ErrorReceived += OnError;
                connection.Closed += OnClosed;

                await connection.ConnectAsync(
                    _info.WsUrl,
                    _info.Ticket,
                    Application.version,
                    _view != null ? _view.EventSeq : 0,
                    _cts.Token);

                SetStatus("Соединение открыто. Ожидаем состояние…", Muted);
            }
            catch (OperationCanceledException)
            {
                // экран закрыли
            }
            catch (Exception exception)
            {
                Debug.LogException(exception);
                SetStatus("Не удалось подключиться: " + exception.Message, new Color(1f, 0.55f, 0.45f));
                _reconnect.gameObject.SetActive(true);
            }
            finally
            {
                _connecting = false;
            }
        }

        private void OnHello(ServerHello hello)
        {
            if (_info != null)
                _info.Seat = hello.PlayerIndex;
        }

        private void OnSnapshot(ServerSnapshot snapshot)
        {
            if (!_root.gameObject.activeSelf || snapshot?.View == null)
                return;

            _view = snapshot.View;
            _finished = _view.IsFinished;
            _pendingIntents.Clear();
            _triggerPowerSlot = null;
            PrepareTriggerSelection();
            if (_view.Clock != null)
            {
                _clockServerMs = _view.Clock.ServerTimeMs;
                _clockReceivedMs = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
            }

            Render();
        }

        private void OnEvents(ServerEvents events)
        {
            if (events?.Events != null)
            {
                foreach (var envelope in events.Events)
                {
                    var line = Describe(envelope.Event);
                    if (!string.IsNullOrWhiteSpace(line))
                        _logLines.Add(line);

                    ShowFeedbackFor(envelope.Event);
                }

                while (_logLines.Count > 40)
                    _logLines.RemoveAt(0);

                RebuildLog();
            }

            _ = RequestSnapshotAsync();
        }

        private void RebuildLog()
        {
            if (_logContent == null)
                return;

            ClearChildren(_logContent);
            var start = Mathf.Max(0, _logLines.Count - 8);
            for (var i = start; i < _logLines.Count; i++)
            {
                var line = UiKit.CreateText(
                    _logContent, "LogLine", _logLines[i], 13,
                    i == _logLines.Count - 1
                        ? new Color(0.92f, 0.94f, 1f)
                        : new Color(0.60f, 0.68f, 0.82f),
                    TextAnchor.MiddleLeft);
                line.horizontalOverflow = HorizontalWrapMode.Wrap;
                UiKit.SetPreferredHeight(line, 30f);
            }
        }

        private void ShowFeedbackFor(EventView view)
        {
            switch (view)
            {
                case AttackDeclaredView attack:
                    ShowFeedback("АТАКА  " + SlotName(attack.AttackerSlot)
                        + " → " + SlotName(attack.TargetSlot),
                        new Color(1f, 0.82f, 0.35f), 1.0f);
                    break;
                case GuardAddedView guard:
                    ShowFeedback("GUARD  +" + guard.Shield,
                        new Color(0.45f, 0.82f, 1f), 1.0f);
                    break;
                case DriveCheckedView drive:
                    ShowFeedback("DRIVE  " + TriggerShort(drive.Trigger.ToString()),
                        new Color(0.72f, 0.88f, 1f), 1.0f);
                    break;
                case TriggerResolvedView trigger:
                    ShowFeedback("TRIGGER  " + trigger.Trigger,
                        new Color(0.72f, 0.88f, 1f), 1.1f);
                    break;
                case BattleResolvedView battle:
                    ShowFeedback(battle.Hit ? "HIT" : "BLOCK",
                        battle.Hit ? new Color(1f, 0.45f, 0.35f) : new Color(0.45f, 0.82f, 1f),
                        0.9f);
                    break;
                case DamageTakenView damage:
                    ShowFeedback("+" + damage.Amount + " DAMAGE",
                        new Color(1f, 0.30f, 0.26f), 1.2f, flash: true);
                    break;
                case HealedView:
                    ShowFeedback("HEAL",
                        new Color(0.45f, 0.95f, 0.62f), 1.1f, flash: true);
                    break;
                case UnitRetiredView:
                    ShowFeedback("RETIRE",
                        new Color(1f, 0.55f, 0.30f), 1.0f);
                    break;
                case PerfectGuardView:
                    ShowFeedback("PERFECT GUARD",
                        new Color(0.60f, 0.82f, 1f), 1.1f);
                    break;
            }
        }

        private string Describe(EventView view)
        {
            if (view == null)
                return null;

            return view switch
            {
                UnitRodeView ride => "Ride: " + CardName(ride.PrintingId),
                UnitCalledView call => "Call: " + CardName(call.PrintingId) + " → " + SlotName(call.Slot),
                UnitMovedView move => "Move: " + SlotName(move.FromSlot) + " → " + SlotName(move.ToSlot),
                AttackDeclaredView attack => "Атака: " + SlotName(attack.AttackerSlot)
                    + " → " + SlotName(attack.TargetSlot),
                GuardAddedView guard => "Guard: " + CardName(guard.PrintingId)
                    + " (+" + guard.Shield + ")",
                PerfectGuardView perfect => "Perfect Guard: " + CardName(perfect.SentinelPrintingId),
                DriveCheckedView drive => "Drive: " + CardName(drive.PrintingId)
                    + " · " + drive.Trigger,
                TriggerResolvedView trigger => "Триггер: " + CardName(trigger.PrintingId),
                BattleResolvedView battle => battle.Hit ? "Атака прошла." : "Атака отбита.",
                DamageTakenView damage => "Урон: " + PlayerName(damage.Player)
                    + " +" + damage.Amount + " (всего " + damage.Total + ")",
                HealedView heal => "Heal: " + PlayerName(heal.Player),
                UnitRetiredView retire => "Retire: " + SlotName(retire.Slot),
                InterceptedView intercept => "Intercept: " + CardName(intercept.PrintingId),
                CardDrawnView draw => "Карта: " + PlayerName(draw.Player),
                PhaseChangedView phase => "Фаза: " + phase.Phase,
                GameFinishedView finish => "Партия завершена.",
                _ => null,
            };
        }

        private string PlayerName(int player) =>
            _view == null ? "P" + player : player == _view.You ? "Вы" : "Противник";

        private void OnClock(ServerClock clock)
        {
            if (!_root.gameObject.activeSelf || clock?.Clock == null)
                return;

            _clockServerMs = clock.Clock.ServerTimeMs;
            _clockReceivedMs = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();

            if (_view != null)
                _view.Clock = clock.Clock;

            UpdateClock();
        }

        private void OnError(ServerError error)
        {
            SetStatus(error.Code + ": " + error.Message, new Color(1f, 0.55f, 0.45f));
        }

        private void OnClosed(string reason)
        {
            if (!_root.gameObject.activeSelf || _finished)
                return;

            SetStatus("Соединение потеряно: " + reason, new Color(1f, 0.60f, 0.45f));
            _reconnect.gameObject.SetActive(true);
        }

        private async Task RequestSnapshotAsync()
        {
            if (_snapshotPending || _connection == null || !_connection.IsConnected)
                return;

            _snapshotPending = true;
            try
            {
                await _connection.RequestSnapshotAsync(_cts != null ? _cts.Token : CancellationToken.None);
            }
            catch (OperationCanceledException)
            {
                // экран закрыли
            }
            catch (Exception exception)
            {
                Debug.LogException(exception);
                SetStatus("Не удалось обновить состояние.", new Color(1f, 0.60f, 0.45f));
            }
            finally
            {
                _snapshotPending = false;
            }
        }

        private async void OnIntentClicked(IntentPayload intent)
        {
            if (_sending || _connection == null || _cts == null || _view == null)
                return;

            if (_abilityDamageIndex >= 0)
            {
                if (intent is ActivateAbilityIntent activate)
                    activate.DamageIndex = _abilityDamageIndex;
                else if (intent is ResolveAbilityIntent resolve)
                    resolve.DamageIndex = _abilityDamageIndex;
            }

            _abilityDamageIndex = -1;
            _pendingIntents.Clear();
            _highlightSlots.Clear();
            _pendingBoosterSlot = -1;
            _triggerPowerSlot = null;
            _sending = true;
            SetStatus("Отправляем: " + Label(intent), Muted);

            try
            {
                var result = await _connection.SubmitAsync(intent, _cts.Token);

                if (!result.Accepted)
                {
                    SetStatus(
                        "Отклонено (" + result.Code + "): " + (result.Reason ?? "без причины"),
                        new Color(1f, 0.55f, 0.45f));
                    if (_view != null)
                        Render();
                }
                else
                {
                    SetStatus(result.Duplicate ? "Повтор уже применён." : "Принято.", Muted);
                    await RequestSnapshotAsync();
                }
            }
            catch (OperationCanceledException)
            {
                // экран закрыли
            }
            catch (Exception exception)
            {
                Debug.LogException(exception);
                SetStatus("Ошибка отправки интента: " + exception.Message, new Color(1f, 0.55f, 0.45f));
            }
            finally
            {
                _sending = false;
            }
        }

        private void OnConcedeClicked()
        {
            if (_view == null || _finished)
                return;

            if (!_confirmConcede)
            {
                _confirmConcede = true;
                _confirmDeadline = Time.unscaledTime + 4f;
                _concedeLabel.text = "Подтвердить сдачу";
                SetStatus("Нажмите «Подтвердить сдачу» ещё раз.", new Color(1f, 0.76f, 0.38f));
                return;
            }

            _confirmConcede = false;
            _concedeLabel.text = "Сдаться";
            OnIntentClicked(new ConcedeIntent());
        }

        private async void OnReconnectClicked()
        {
            if (_info == null)
                return;

            _reconnect.interactable = false;
            SetStatus("Получаем новый тикет…", Muted);

            try
            {
                var ticket = await _meta.CreateTicketAsync(_info.MatchId);
                _info.Ticket = ticket.Ticket;
                _info.WsUrl = ticket.WsUrl;
                await ConnectAsync();
            }
            catch (ApiException exception)
            {
                SetStatus(exception.Message, new Color(1f, 0.55f, 0.45f));
            }
            catch (Exception exception)
            {
                Debug.LogException(exception);
                SetStatus("Переподключение не удалось.", new Color(1f, 0.55f, 0.45f));
            }
            finally
            {
                _reconnect.interactable = true;
            }
        }

        private void OnExitClicked()
        {
            Hide();
            _onExit();
        }

        private void Render()
        {
            if (_view == null)
                return;

            _board3D?.SetSelfPlayer(_view.You);
            _board3D?.Render(_view, BuildBoardRenderState());
            UpdateStatsOverlay();

            RebuildIntents(_view);
            UpdateClock();

            if (_view.IsFinished)
                ShowResult(_view);
        }

        private BoardRenderState BuildBoardRenderState()
        {
            var state = new BoardRenderState
            {
                MulliganSelecting = IsMulliganSelecting(),
                DamageChoice = IsDamageChoice(),
                AbilityDamageTargeting = IsAbilityDamageTargeting(),
                AbilityDamageIndex = _abilityDamageIndex,
                MatchFinished = _view != null && _view.IsFinished,
            };

            foreach (var key in _highlightSlots)
                state.Highlights.Add(key);

            if (_view != null)
            {
                foreach (var intent in _view.LegalIntents ?? new List<IntentPayload>())
                {
                    switch (intent)
                    {
                        case CallIntent call:
                            state.DropTargets.Add(new BoardSlotKey(_view.You, call.Slot));
                            break;
                        case RideIntent _:
                            state.DropTargets.Add(new BoardSlotKey(
                                _view.You,
                                PlaymatLayout.VanguardSlot));
                            break;
                        case MoveIntent move:
                            state.DropTargets.Add(new BoardSlotKey(_view.You, move.ToSlot));
                            break;
                        case AttackIntent attack:
                            state.DropTargets.Add(new BoardSlotKey(
                                1 - _view.You,
                                attack.TargetSlot));
                            break;
                        case GuardIntent _:
                        case InterceptIntent _:
                            state.GuardianDropAllowed = true;
                            break;
                    }
                }
            }

            if (state.MulliganSelecting && _view != null && _mulliganSelected.Count > 0)
            {
                var hand = _view.Players
                    .FirstOrDefault(player => player.Index == _view.You)
                    ?.Hand;
                if (hand != null)
                {
                    foreach (var index in _mulliganSelected)
                    {
                        if (index >= 0 && index < hand.Count)
                            state.SelectedHandInstanceIds.Add(hand[index].InstanceId);
                    }
                }
            }

            return state;
        }

        private BoardArt ResolveBoardArt(string printingId)
        {
            _catalog.TryGetValue(printingId, out var meta);
            var clan = meta != null ? meta.Clan : "None";
            var nameId = meta != null ? meta.NameId : printingId;
            var sprite = CardImageService.Resolve(meta != null ? meta.ImageKey : null, null);
            if (sprite == null)
            {
                sprite = CardImageService.Resolve(
                    CardImageService.ImageKeyForPrinting(printingId),
                    null);
            }

            if (sprite == null)
                sprite = CardArt.ForCard(nameId ?? printingId ?? "card", clan);
            return new BoardArt(
                sprite != null ? sprite.texture : null,
                CardArt.ClanColor(clan),
                meta != null ? Loc.CardName(meta) : printingId);
        }

        private bool IsDamageChoice() =>
            _view?.Choice != null
            && _view.Choice.Prompt != null
            && _view.Choice.Prompt.IndexOf("урон", StringComparison.OrdinalIgnoreCase) >= 0;

        private bool IsAbilityDamageTargeting()
        {
            if (_view == null || _view.Choice != null || _view.ActivePlayer != _view.You)
                return false;

            var self = _view.Players.FirstOrDefault(player => player.Index == _view.You);
            if (self == null || self.FaceUpDamage.Count == 0)
                return false;

            return (_view.LegalIntents ?? new List<IntentPayload>())
                .Any(intent => intent is ActivateAbilityIntent or ResolveAbilityIntent);
        }

        private void OnBoard3DCardClicked(BoardCardRef card)
        {
            if (_view == null || _sending)
                return;

            switch (card.Zone)
            {
                case BoardZone.Hand:
                    OnBoardTargetClicked(new BoardTarget(
                        card.Player, -2, card.PrintingId, card.InstanceId, true));
                    break;

                case BoardZone.Vanguard:
                    OnBoardTargetClicked(new BoardTarget(
                        card.Player, -1, card.PrintingId, card.InstanceId, false));
                    break;

                case BoardZone.RearGuard:
                    OnBoardTargetClicked(new BoardTarget(
                        card.Player, card.Slot, card.PrintingId, card.InstanceId, false));
                    break;

                case BoardZone.Damage:
                    OnDamageClicked(card.Index);
                    break;

                case BoardZone.Soul:
                    SetStatus("Душа открывается правой кнопкой мыши.", Muted);
                    break;

                case BoardZone.Guardian:
                    SetStatus("Карта в круге защиты.", Muted);
                    break;
            }
        }

        private void OnBoard3DSlotClicked(BoardCardRef slot)
        {
            if (_view == null || _sending)
                return;

            if (slot.Zone == BoardZone.Guardian)
                return;

            OnBoardTargetClicked(new BoardTarget(slot.Player, slot.Slot, null, 0, false));
        }

        private void OnBoard3DCardDropped(BoardCardRef source, BoardCardRef target)
        {
            if (_view == null || _sending)
                return;

            var legal = _view.LegalIntents ?? new List<IntentPayload>();
            IntentPayload intent = null;

            if (source.Zone == BoardZone.Hand)
            {
                if (target.Zone == BoardZone.Guardian)
                {
                    intent = legal.OfType<GuardIntent>()
                        .FirstOrDefault(item => item.PrintingId == source.PrintingId);
                }
                else if (target.Player == _view.You && target.Zone == BoardZone.Vanguard)
                {
                    intent = legal.OfType<RideIntent>()
                        .FirstOrDefault(item => item.PrintingId == source.PrintingId);
                }
                else if (target.Player == _view.You && target.Zone == BoardZone.RearGuard)
                {
                    intent = legal.OfType<CallIntent>()
                        .FirstOrDefault(item => item.PrintingId == source.PrintingId
                            && item.Slot == target.Slot);
                }
            }
            else if (source.IsField)
            {
                if (target.Zone == BoardZone.Guardian)
                {
                    intent = legal.OfType<InterceptIntent>()
                        .FirstOrDefault(item => item.Slot == source.Slot);
                }
                else if (target.Player == _view.You && target.Zone == BoardZone.RearGuard)
                {
                    intent = legal.OfType<MoveIntent>()
                        .FirstOrDefault(item => item.FromSlot == source.Slot
                            && item.ToSlot == target.Slot);
                }
                else if (target.Player != _view.You
                    && (target.Zone == BoardZone.Vanguard
                        || target.Zone == BoardZone.RearGuard))
                {
                    intent = legal.OfType<AttackIntent>()
                        .FirstOrDefault(item => item.AttackerSlot == source.Slot
                            && item.TargetSlot == target.Slot);
                }
            }

            if (intent == null)
            {
                SetStatus("Сюда нельзя положить эту карту.", new Color(1f, 0.55f, 0.45f));
                RefreshBoardHighlights();
                return;
            }

            ClearSelection(rebuild: false);
            OnIntentClicked(intent);
        }

        private void OnBoard3DPileRightClicked(BoardCardRef pile)
        {
            if (_view == null)
                return;

            if (pile.Zone == BoardZone.Soul)
                ShowSoul(pile.Player);
        }

        private void OnBoard3DPileClicked(BoardCardRef pile)
        {
            if (_view == null)
                return;

            if (pile.Zone == BoardZone.Soul)
            {
                SetStatus("Душа открывается правой кнопкой мыши.", Muted);
                return;
            }

            if (pile.Zone == BoardZone.Drop)
            {
                ShowDrop(pile.Player);
                return;
            }

            var player = _view.Players.FirstOrDefault(item => item.Index == pile.Player);
            if (player == null)
                return;

            if (pile.Zone == BoardZone.Deck)
                SetStatus("В колоде " + player.DeckCount + " карт.", Muted);
        }

        private void BuildStatsOverlays()
        {
            _selfStatsText = CreateStatsPanel(
                "SelfStats",
                new Vector2(0f, 0f),
                new Vector2(0f, 0f),
                new Vector2(30f, 24f),
                TextAnchor.MiddleLeft);
            _opponentStatsText = CreateStatsPanel(
                "OpponentStats",
                new Vector2(1f, 1f),
                new Vector2(1f, 1f),
                new Vector2(-488f, -108f),
                TextAnchor.MiddleRight);
        }

        private Text CreateStatsPanel(
            string name,
            Vector2 anchor,
            Vector2 pivot,
            Vector2 position,
            TextAnchor alignment)
        {
            var panel = UiKit.CreatePanel(
                _root,
                name,
                new Color(0.02f, 0.035f, 0.055f, 0.72f));
            panel.anchorMin = anchor;
            panel.anchorMax = anchor;
            panel.pivot = pivot;
            panel.anchoredPosition = position;
            panel.sizeDelta = new Vector2(360f, 58f);

            var image = panel.GetComponent<Image>();
            if (image != null)
                image.raycastTarget = false;

            var text = UiKit.CreateText(
                panel,
                "Stats",
                string.Empty,
                14,
                new Color(0.86f, 0.91f, 1f),
                alignment);
            UiKit.Stretch(text.rectTransform);
            text.rectTransform.offsetMin = new Vector2(12f, 5f);
            text.rectTransform.offsetMax = new Vector2(-12f, -5f);
            text.horizontalOverflow = HorizontalWrapMode.Wrap;
            text.verticalOverflow = VerticalWrapMode.Overflow;
            UiKit.MakeLiteral(text);
            return text;
        }

        private void UpdateStatsOverlay()
        {
            if (_view == null || _selfStatsText == null || _opponentStatsText == null)
                return;

            var self = _view.Players.FirstOrDefault(player => player.Index == _view.You);
            var opponent = _view.Players.FirstOrDefault(player => player.Index != _view.You);
            _selfStatsText.text = FormatStats(self, selfSide: true);
            _opponentStatsText.text = FormatStats(opponent, selfSide: false);
        }

        private static string FormatStats(PlayerView player, bool selfSide)
        {
            var title = Loc.Translate(selfSide ? "ВЫ" : "ПРОТИВНИК");
            if (player == null)
                return title;

            var damage = player.FaceDownDamage + (player.FaceUpDamage?.Count ?? 0);
            var hand = Mathf.Max(player.HandCount, player.Hand?.Count ?? 0);
            return title + " · " + player.Name + "\n"
                + Loc.Translate("Рука") + " " + hand
                + "   " + Loc.Translate("Колода") + " " + player.DeckCount
                + "   " + Loc.Translate("ДРОП") + " " + (player.Drop?.Count ?? 0)
                + "   " + Loc.Translate("УРОН") + " " + damage
                + "   " + Loc.Translate("Душа") + " " + (player.Soul?.Count ?? 0);
        }

        private void BuildSoulOverlay()
        {
            _soulOverlay = UiKit.CreatePanel(_root, "SoulOverlay", new Color(0f, 0f, 0f, 0.74f));
            var panel = UiKit.CreateCenteredCard(
                _soulOverlay,
                "SoulPanel",
                new Vector2(880f, 640f),
                Panel);
            UiKit.AddVerticalLayout(panel, 18, 10);

            _soulTitle = UiKit.CreateText(
                panel,
                "SoulTitle",
                "Душа",
                24,
                Color.white,
                TextAnchor.MiddleLeft);
            _soulTitle.fontStyle = FontStyle.Bold;
            UiKit.SetPreferredHeight(_soulTitle, 34f);

            var scroll = UiKit.CreateScrollView(panel, "SoulScroll", out _soulContent, 6f);
            var scrollElement = scroll.gameObject.AddComponent<LayoutElement>();
            scrollElement.flexibleHeight = 1f;
            scrollElement.minHeight = 420f;

            var close = UiKit.CreateButton(
                panel,
                "SoulClose",
                "Закрыть",
                () => _soulOverlay.gameObject.SetActive(false),
                18);
            UiKit.SetPreferredHeight(close, 46f);

            _soulOverlay.gameObject.SetActive(false);
        }

        private void ShowSoul(int playerIndex)
        {
            var player = _view?.Players.FirstOrDefault(item => item.Index == playerIndex);
            if (player == null)
                return;

            ShowCardList("Душа", player.Name, player.Soul);
        }

        private void ShowDrop(int playerIndex)
        {
            var player = _view?.Players.FirstOrDefault(item => item.Index == playerIndex);
            if (player == null)
                return;

            ShowCardList("Дроп", player.Name, player.Drop);
        }

        private void ShowCardList(string title, string playerName, List<CardView> cards)
        {
            if (_soulOverlay == null)
                return;

            _soulTitle.text = title + " · " + playerName + " · " + (cards?.Count ?? 0);
            ClearChildren(_soulContent);

            if (cards == null || cards.Count == 0)
            {
                var empty = UiKit.CreateText(
                    _soulContent,
                    "CardListEmpty",
                    "Нет карт.",
                    17,
                    Muted);
                UiKit.SetPreferredHeight(empty, 80f);
            }
            else
            {
                for (var i = cards.Count - 1; i >= 0; i--)
                    AddSoulRow(cards[i]);
            }

            _soulOverlay.SetAsLastSibling();
            _soulOverlay.gameObject.SetActive(true);
        }

        private void AddSoulRow(CardView card)
        {
            var row = UiKit.CreatePanel(
                _soulContent,
                "Soul_" + card.InstanceId,
                new Color(0.08f, 0.10f, 0.15f, 1f));
            var rowElement = row.gameObject.AddComponent<LayoutElement>();
            rowElement.preferredHeight = 106f;
            UiKit.AddHorizontalLayout(row, 6, 10);

            var art = UiKit.CreatePanel(row, "Art", Color.white);
            var artElement = art.gameObject.AddComponent<LayoutElement>();
            artElement.preferredWidth = 64f;
            artElement.preferredHeight = 92f;
            artElement.flexibleWidth = 0f;

            _catalog.TryGetValue(card.PrintingId, out var meta);
            CardImageService.Apply(
                art.GetComponent<Image>(),
                meta != null ? meta.ImageKey : null,
                CardArt.ForCard(
                    meta != null ? meta.NameId : card.PrintingId,
                    meta != null ? meta.Clan : "None"));

            var name = UiKit.CreateText(
                row,
                "Name",
                meta != null ? Loc.CardName(meta) : card.PrintingId,
                17,
                Color.white,
                TextAnchor.MiddleLeft);
            UiKit.MakeLiteral(name);
            UiKit.SetPreferredHeight(name, 92f);

            if (meta != null)
            {
                var info = UiKit.CreateText(
                    row,
                    "Info",
                    "G" + meta.Grade + "  ·  P " + card.Power + "  ·  C " + card.Critical,
                    14,
                    Muted,
                    TextAnchor.MiddleRight);
                UiKit.MakeLiteral(info);
                UiKit.SetPreferredHeight(info, 92f, 0f);
            }
        }

        private void OnDamageClicked(int displayIndex)
        {
            if (IsDamageChoice())
            {
                if (_view?.Choice?.Options == null)
                    return;

                for (var i = 0; i < _view.Choice.Options.Count; i++)
                {
                    if (_view.Choice.Options[i].Slot == displayIndex)
                    {
                        OnIntentClicked(new ChooseIntent { Index = i });
                        return;
                    }
                }

                return;
            }

            if (!IsAbilityDamageTargeting())
                return;

            _abilityDamageIndex = displayIndex;
            SetStatus(
                "Для Counter Blast выбрана карта урона " + (displayIndex + 1) + ".",
                new Color(0.45f, 0.95f, 0.62f));
            Render();
        }

        private string CardName(string printingId) =>
            _catalog.TryGetValue(printingId, out var meta) ? Loc.CardName(meta) : printingId;

        private static string TriggerShort(string trigger) => trigger switch
        {
            "Critical" => "K",
            "Draw" => "D",
            "Stand" => "S",
            "Heal" => "H",
            _ => "—",
        };

        private bool IsMulliganSelecting() =>
            _view != null
            && !_view.IsFinished
            && _view.Phase == GamePhase.Mulligan
            && _view.ActivePlayer == _view.You
            && !_mulliganUsed;

        private int HandIndexOf(int instanceId)
        {
            var hand = _view?.Players.FirstOrDefault(player => player.Index == _view.You)?.Hand;
            if (hand == null)
                return -1;

            for (var i = 0; i < hand.Count; i++)
            {
                if (hand[i].InstanceId == instanceId)
                    return i;
            }

            return -1;
        }

        private void ToggleMulligan(int index)
        {
            if (!_mulliganSelected.Add(index))
                _mulliganSelected.Remove(index);

            SetStatus(
                _mulliganSelected.Count == 0
                    ? "Кликните карты, которые вернутся в колоду."
                    : "К обмену выбрано карт: " + _mulliganSelected.Count + ".",
                new Color(0.98f, 0.82f, 0.42f));
            Render();
        }

        private void SendMulligan()
        {
            if (!IsMulliganSelecting() || _mulliganSelected.Count == 0)
                return;

            var indexes = _mulliganSelected.OrderBy(index => index).ToList();
            _mulliganSelected.Clear();
            _mulliganUsed = true;
            OnIntentClicked(new MulliganIntent { HandIndexes = indexes });
        }

        private void OnBoardTargetClicked(BoardTarget target)
        {
            if (_view == null || _sending)
                return;

            if (IsMulliganSelecting() && target.IsHand && target.Player == _view.You)
            {
                var handIndex = HandIndexOf(target.InstanceId);
                if (handIndex >= 0)
                {
                    ToggleMulligan(handIndex);
                    return;
                }
            }

            var legal = _view.LegalIntents ?? new List<IntentPayload>();

            if (_pendingIntents.Any(intent => intent is ResolveTriggerIntent)
                && HandleTriggerTarget(target))
            {
                return;
            }

            if (_pendingIntents.Count > 0)
            {
                // Клик по своему заднему ряду выбирает карту поддержки.
                if (target.Player == _view.You && target.Slot is 0 or 1 or 2)
                {
                    var boosted = _pendingIntents
                        .OfType<AttackIntent>()
                        .Where(attack => attack.BoosterSlot == target.Slot)
                        .ToList();

                    if (boosted.Count > 0)
                    {
                        _pendingBoosterSlot = target.Slot;
                        RebuildHighlights();
                        RebuildIntents(_view);
                        SetStatus(
                            "Поддержка: " + CardName(target.PrintingId) + ". Выберите цель атаки.",
                            new Color(0.98f, 0.82f, 0.42f));
                        return;
                    }
                }

                var matches = _pendingIntents
                    .Where(intent => TryGetTarget(intent, out var candidate) && candidate.Matches(target))
                    .OrderBy(intent =>
                    {
                        if (intent is not AttackIntent attack)
                            return 2;

                        if (_pendingBoosterSlot >= 0)
                            return attack.BoosterSlot == _pendingBoosterSlot ? 0 : 3;

                        return attack.BoosterSlot < 0 ? 0 : 1;
                    })
                    .ToList();

                if (matches.Count > 0)
                {
                    ClearSelection(rebuild: false);
                    OnIntentClicked(matches[0]);
                    return;
                }
            }

            var sources = legal
                .Where(intent => TryGetSource(intent, out var source) && source.Matches(target))
                .ToList();

            if (sources.Count == 0)
            {
                SetStatus("Для этой карты сейчас нет доступного действия.", Muted);
                return;
            }

            if (sources.Count == 1)
            {
                ClearSelection(rebuild: false);
                OnIntentClicked(sources[0]);
                return;
            }

            var withTargets = sources
                .Where(intent => TryGetTarget(intent, out _))
                .ToList();

            if (withTargets.Count == 0)
            {
                ClearSelection(rebuild: false);
                OnIntentClicked(sources[0]);
                return;
            }

            _pendingIntents.Clear();
            _pendingIntents.AddRange(withTargets);
            RebuildHighlights();
            RebuildIntents(_view);
            SetStatus("Выберите цель на поле.", new Color(0.98f, 0.82f, 0.42f));
        }

        private void ClearSelection(bool rebuild = true)
        {
            _pendingIntents.Clear();
            _highlightSlots.Clear();
            _pendingBoosterSlot = -1;
            _triggerPowerSlot = null;
            if (rebuild && _view != null)
                RebuildIntents(_view);
            RefreshBoardHighlights();
        }

        private void PrepareTriggerSelection()
        {
            if (_view?.Trigger == null || _view.ActivePlayer != _view.You)
                return;

            var triggers = (_view.LegalIntents ?? new List<IntentPayload>())
                .OfType<ResolveTriggerIntent>()
                .ToList();
            if (triggers.Count == 0)
                return;

            _pendingIntents.Clear();
            _pendingIntents.AddRange(triggers);
            _triggerPowerSlot = null;
            RebuildHighlights();
        }

        private bool HandleTriggerTarget(BoardTarget target)
        {
            if (_view?.Trigger == null || target.Player != _view.You)
                return false;

            var triggers = _pendingIntents.OfType<ResolveTriggerIntent>().ToList();
            if (triggers.Count == 0)
                return false;

            if (_triggerPowerSlot == null)
            {
                var powerTargets = triggers
                    .Where(trigger => trigger.PowerTarget == target.Slot)
                    .ToList();
                if (powerTargets.Count == 0)
                    return false;

                _triggerPowerSlot = target.Slot;
                _pendingIntents.Clear();
                _pendingIntents.AddRange(powerTargets);
                RebuildHighlights();
                RebuildIntents(_view);
                SetStatus(
                    "Триггер: выберите цель эффекта.",
                    new Color(0.98f, 0.82f, 0.42f));
                return true;
            }

            var effect = triggers.FirstOrDefault(trigger => trigger.EffectTarget == target.Slot);
            if (effect == null)
                return false;

            ClearSelection(rebuild: false);
            OnIntentClicked(effect);
            return true;
        }

        private void RebuildHighlights()
        {
            _highlightSlots.Clear();

            if (_view == null)
                return;

            if (_pendingIntents.Any(intent => intent is ResolveTriggerIntent))
            {
                foreach (var trigger in _pendingIntents.OfType<ResolveTriggerIntent>())
                {
                    var slot = _triggerPowerSlot == null
                        ? trigger.PowerTarget
                        : trigger.EffectTarget;
                    _highlightSlots.Add(new BoardSlotKey(_view.You, slot));
                }

                RefreshBoardHighlights();
                return;
            }

            foreach (var intent in _pendingIntents)
            {
                if (TryGetTarget(intent, out var target) && target.Slot >= -1)
                    _highlightSlots.Add(new BoardSlotKey(target.Player, target.Slot));

                if (intent is AttackIntent attack && attack.BoosterSlot >= 0)
                    _highlightSlots.Add(new BoardSlotKey(_view.You, attack.BoosterSlot));
            }

            RefreshBoardHighlights();
        }

        private void RefreshBoardHighlights()
        {
            if (_view != null && _board3D != null)
                _board3D.Render(_view, BuildBoardRenderState());
        }

        private bool TryGetSource(IntentPayload intent, out BoardTarget source)
        {
            source = default;
            if (_view == null)
                return false;

            switch (intent)
            {
                case RideIntent ride:
                    source = new BoardTarget(_view.You, -2, ride.PrintingId, 0, true);
                    return true;
                case CallIntent call:
                    source = new BoardTarget(_view.You, -2, call.PrintingId, 0, true);
                    return true;
                case GuardIntent guard:
                    source = new BoardTarget(_view.You, -2, guard.PrintingId, 0, true);
                    return true;
                case MoveIntent move:
                    source = FieldTarget(_view.You, move.FromSlot);
                    return true;
                case AttackIntent attack:
                    source = FieldTarget(_view.You, attack.AttackerSlot);
                    return true;
                case InterceptIntent intercept:
                    source = FieldTarget(_view.You, intercept.Slot);
                    return true;
                case ActivateAbilityIntent activate:
                    source = InstanceTarget(_view.You, activate.InstanceId);
                    return source.InstanceId != 0;
                default:
                    return false;
            }
        }

        private bool TryGetTarget(IntentPayload intent, out BoardTarget target)
        {
            target = default;
            if (_view == null)
                return false;

            switch (intent)
            {
                case CallIntent call:
                    target = FieldTarget(_view.You, call.Slot);
                    return true;
                case MoveIntent move:
                    target = FieldTarget(_view.You, move.ToSlot);
                    return true;
                case AttackIntent attack:
                    target = FieldTarget(1 - _view.You, attack.TargetSlot);
                    return true;
                default:
                    return false;
            }
        }

        private BoardTarget FieldTarget(int player, int slot)
        {
            var card = CardAt(player, slot);
            return new BoardTarget(player, slot, card != null ? card.PrintingId : null,
                card != null ? card.InstanceId : 0, false);
        }

        private BoardTarget InstanceTarget(int player, int instanceId)
        {
            var card = InstanceAt(player, instanceId);
            if (card == null)
                return default;

            if (_view != null
                && _view.Players.FirstOrDefault(item => item.Index == player)?.Vanguard is { } vanguard
                && vanguard.InstanceId == instanceId)
            {
                return new BoardTarget(player, -1, card.PrintingId, instanceId, false);
            }

            var field = _view?.Players.FirstOrDefault(item => item.Index == player);
            if (field?.RearGuards != null)
            {
                for (var i = 0; i < field.RearGuards.Length; i++)
                {
                    if (field.RearGuards[i]?.InstanceId == instanceId)
                        return new BoardTarget(player, i, card.PrintingId, instanceId, false);
                }
            }

            return default;
        }

        private CardView CardAt(int player, int slot)
        {
            var side = _view?.Players.FirstOrDefault(item => item.Index == player);
            if (side == null)
                return null;

            if (slot == -1)
                return side.Vanguard;

            return side.RearGuards != null && slot >= 0 && slot < side.RearGuards.Length
                ? side.RearGuards[slot]
                : null;
        }

        private CardView InstanceAt(int player, int instanceId)
        {
            var side = _view?.Players.FirstOrDefault(item => item.Index == player);
            if (side == null)
                return null;

            if (side.Vanguard?.InstanceId == instanceId)
                return side.Vanguard;

            return side.RearGuards?.FirstOrDefault(card => card?.InstanceId == instanceId);
        }

        private bool IsBoardIntent(IntentPayload intent) =>
            intent is RideIntent or CallIntent or MoveIntent or AttackIntent
                or GuardIntent or InterceptIntent or ActivateAbilityIntent;

        private void RebuildIntents(MatchView view)
        {
            ClearChildren(_intents);

            var legal = view.LegalIntents ?? new List<IntentPayload>();
            var playable = legal.Where(intent => intent is not ConcedeIntent).ToList();
            var board = playable.Where(IsBoardIntent).ToList();
            var global = playable.Where(intent => !IsBoardIntent(intent)).ToList();

            if (_pendingIntents.Count > 0)
            {
                var prompt = UiKit.CreateText(
                    _intents,
                    "TargetPrompt",
                    _pendingIntents.Any(intent => intent is ResolveTriggerIntent)
                        ? (_triggerPowerSlot == null
                            ? "Триггер: выберите цель силы."
                            : "Триггер: выберите цель эффекта.")
                        : _pendingBoosterSlot >= 0
                            ? "Поддержка: " + CardName(
                                CardAt(_view.You, _pendingBoosterSlot)?.PrintingId ?? string.Empty)
                              + ".\nВыберите цель атаки или «Отмена»."
                            : "Выберите цель на поле.\nНажмите «Отмена», чтобы снять выбор.",
                    16,
                    new Color(0.98f, 0.82f, 0.42f),
                    TextAnchor.UpperLeft);
                prompt.horizontalOverflow = HorizontalWrapMode.Wrap;
                UiKit.SetPreferredHeight(prompt, 64f);

                var cancel = UiKit.CreateButton(
                    _intents, "CancelTarget", "Отмена", () =>
                    {
                        ClearSelection();
                        Render();
                    }, 17);
                UiKit.SetPreferredHeight(cancel, 44f);
                return;
            }

            if (playable.Count == 0)
            {
                var waiting = UiKit.CreateText(
                    _intents,
                    "Waiting",
                    view.IsFinished ? "Матч завершён." : "Сейчас решает противник…",
                    18,
                    Muted);
                UiKit.SetPreferredHeight(waiting, 110f);
                return;
            }

            if (IsMulliganSelecting())
            {
                var mulliganHint = UiKit.CreateText(
                    _intents,
                    "MulliganHint",
                    "Кликните карты, которые вернутся в колоду.",
                    15,
                    new Color(0.72f, 0.80f, 0.94f),
                    TextAnchor.UpperLeft);
                mulliganHint.horizontalOverflow = HorizontalWrapMode.Wrap;
                UiKit.SetPreferredHeight(mulliganHint, 34f);

                if (_mulliganSelected.Count > 0)
                {
                    var exchange = UiKit.CreateButton(
                        _intents,
                        "MulliganExchange",
                        "Маллиган: " + _mulliganSelected.Count + " карт",
                        SendMulligan,
                        16);
                    UiKit.SetPreferredHeight(exchange, 44f);
                }
            }

            if (IsAbilityDamageTargeting())
            {
                var abilityHint = UiKit.CreateText(
                    _intents,
                    "AbilityDamageHint",
                    "Выберите закрытую карту урона для Counter Blast (необязательно).",
                    15,
                    new Color(0.72f, 0.80f, 0.94f),
                    TextAnchor.UpperLeft);
                abilityHint.horizontalOverflow = HorizontalWrapMode.Wrap;
                UiKit.SetPreferredHeight(abilityHint, 34f);
            }

            if (board.Count > 0)
            {
                var hint = UiKit.CreateText(
                    _intents,
                    "BoardHint",
                    "Нажмите на карту в руке или на поле.\nДопустимые цели подсветятся.",
                    15,
                    new Color(0.72f, 0.80f, 0.94f),
                    TextAnchor.UpperLeft);
                hint.horizontalOverflow = HorizontalWrapMode.Wrap;
                UiKit.SetPreferredHeight(hint, 52f);

                var toggle = UiKit.CreateButton(
                    _intents,
                    "ToggleAllIntents",
                    _showAllIntents ? "Скрыть все действия" : "Показать все действия",
                    () =>
                    {
                        _showAllIntents = !_showAllIntents;
                        RebuildIntents(_view);
                    },
                    15);
                UiKit.SetPreferredHeight(toggle, 38f);
            }

            foreach (var intent in global)
                AddIntentButton(intent);

            if (_showAllIntents)
            {
                foreach (var intent in board)
                    AddIntentButton(intent);
            }
        }

        private void AddIntentButton(IntentPayload intent)
        {
            var captured = intent;
            var button = UiKit.CreateButton(
                _intents,
                "Intent_" + captured.GetType().Name,
                Label(captured),
                () => OnIntentClicked(captured),
                16);
            UiKit.SetPreferredHeight(button, 46f);
        }

        private void ShowResult(MatchView view)
        {
            if (_result.gameObject.activeSelf)
                return;

            _result.SetAsLastSibling();
            _result.gameObject.SetActive(true);
            _concede.interactable = false;

            _resultText.text = view.Winner < 0
                ? "Ничья или матч прерван."
                : view.Winner == view.You
                    ? "Победа!"
                    : "Поражение.";

            _resultText.text += "\nМатч " + view.MatchId + " завершён.";
        }

        private void UpdateClock()
        {
            if (_view?.Clock == null || !_view.Clock.IsRunning)
            {
                _clock.text = "—";
                return;
            }

            var localNow = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
            var serverNow = _clockServerMs + (localNow - _clockReceivedMs);
            var remaining = Math.Max(0, _view.Clock.TurnDeadlineMs - serverNow);
            var bank = _view.Clock.DecisionPlayer == _view.You
                ? _view.Clock.Bank0Ms
                : _view.Clock.Bank1Ms;

            _clock.text = Format(remaining) + "   ·   банк " + Format(bank);
        }

        private static string Format(long milliseconds)
        {
            var totalSeconds = Math.Max(0, milliseconds / 1000);
            var minutes = totalSeconds / 60;
            var seconds = totalSeconds % 60;
            return minutes.ToString("00") + ":" + seconds.ToString("00");
        }

        private static void ClearChildren(Transform parent)
        {
            for (var i = parent.childCount - 1; i >= 0; i--)
            {
                var child = parent.GetChild(i).gameObject;
                if (Application.isPlaying)
                    UnityEngine.Object.Destroy(child);
                else
                    UnityEngine.Object.DestroyImmediate(child);
            }
        }

        private static string SlotName(int slot)
        {
            if (slot < 0)
                return "Vanguard";

            return "R" + (slot + 1);
        }

        private string Label(IntentPayload intent)
        {
            switch (intent)
            {
                case FinishMulliganIntent _: return "Закончить маллиган";
                case MulliganIntent mulligan: return "Маллиган: " + mulligan.HandIndexes.Count + " карт";
                case SkipRideIntent _: return "Пропустить Ride";
                case RideIntent ride: return "Ride: " + CardName(ride.PrintingId);
                case CallIntent call: return "Call " + CardName(call.PrintingId) + " → " + SlotName(call.Slot);
                case MoveIntent move: return "Move " + SlotName(move.FromSlot) + " → " + SlotName(move.ToSlot);
                case EnterBattleIntent _: return "В фазу боя";
                case AttackIntent attack:
                    return "Атака " + SlotName(attack.AttackerSlot) + " → " + SlotName(attack.TargetSlot)
                        + (attack.BoosterSlot >= 0 ? " + boost" : string.Empty);
                case GuardIntent guard: return "Guard: " + CardName(guard.PrintingId);
                case InterceptIntent intercept: return "Intercept: " + SlotName(intercept.Slot);
                case PassGuardIntent _: return "Пропустить Guard";
                case ResolveTriggerIntent trigger:
                    return "Триггер: сила " + SlotName(trigger.PowerTarget)
                        + ", эффект " + SlotName(trigger.EffectTarget);
                case SelectTriggerIntent select: return "Выбрать триггер #" + select.Index;
                case ResolveAbilityIntent ability:
                    return ability.Accept ? "Применить способность" : "Пропустить способность";
                case ChooseIntent choose: return ChoiceLabel(choose.Index);
                case ActivateAbilityIntent activate:
                    return "Способность #" + activate.InstanceId;
                case EndTurnIntent _: return "Закончить ход";
                case ConcedeIntent _: return "Сдаться";
                default: return intent.GetType().Name;
            }
        }

        private string ChoiceLabel(int index)
        {
            if (_view?.Choice?.Options != null
                && index >= 0
                && index < _view.Choice.Options.Count)
            {
                return "Выбрать: " + _view.Choice.Options[index].Label;
            }

            return "Выбрать вариант #" + index;
        }

        private void SetStatus(string text, Color color)
        {
            _status.text = text ?? string.Empty;
            _status.color = color;
        }

        private readonly struct BoardTarget
        {
            public BoardTarget(
                int player,
                int slot,
                string printingId,
                int instanceId,
                bool isHand)
            {
                Player = player;
                Slot = slot;
                PrintingId = printingId;
                InstanceId = instanceId;
                IsHand = isHand;
            }

            public int Player { get; }
            public int Slot { get; }
            public string PrintingId { get; }
            public int InstanceId { get; }
            public bool IsHand { get; }

            public bool Matches(BoardTarget other)
            {
                if (IsHand || other.IsHand)
                {
                    return IsHand && other.IsHand
                        && Player == other.Player
                        && string.Equals(PrintingId, other.PrintingId, StringComparison.Ordinal);
                }

                return Player == other.Player && Slot == other.Slot;
            }
        }
    }
}