using System;
using System.Collections.Generic;
using System.Linq;
using Luneraria.Core;
using Luneraria.View;
using UnityEngine;
using UnityEngine.UIElements;

namespace Luneraria.UI
{
    /// <summary>
    /// Champions of Luneraria in-match HUD (port of scripts/luneraria/ui/lune_hud.gd, G3).
    /// Presentation only: it reads the match through LuneHudModel (the privacy filter) and raises
    /// the human player's commands as events for the game controller; no UI state creates
    /// ownership or changes a rule.
    ///
    /// Layout in logical pixels (1706×960 at 16:9, UI scale applied on top):
    ///   top      match status: own Ancient, WELLE n and phase, enemy Ancient; options and menu
    ///   left     lanes (threat, towers, players, announced dangers), own team, event feed
    ///   bottom   gold, unit cards or attack champions, own army, hero
    ///   right    context only: boss grotto, next wave, the selected unit
    ///   corner   Bereit (planning) or the combat clock above the minimap
    /// Updates follow changes: every component compares a signature and rebuilds only when its
    /// data changed; the HUD polls at 10 Hz in planning and 5 Hz in combat, the minimap at 10 Hz.
    /// </summary>
    public sealed class LuneHud : MonoBehaviour
    {
        public const float Margin = 12f;
        public const float LeftWidth = 312f;
        public const float RightWidth = 322f;
        public const float MapEdge = 224f;
        public const float ReadyHeight = 84f;
        public const float ReadyCombat = 54f;
        public const float BarPlanning = 176f;
        public const float BarCombat = 128f;
        /// <summary>Smallest logical area the layout is built for; the UI scale never shrinks below it.</summary>
        public static readonly Vector2 MinArea = new Vector2(1560f, 880f);
        /// <summary>Godot base size of the content scale (canvas_items, expand).</summary>
        public static readonly Vector2Int Reference = new Vector2Int(1600, 960);
        public static readonly Dictionary<string, string> LaneKeys = new Dictionary<string, string> { { "top", "F2" }, { "mid", "F3" }, { "bot", "F4" } };
        const float PlanningRate = .1f;
        const float CombatRate = .2f;
        const float MapRate = .1f;
        const float FeedRate = .25f;

        public event Action<Command> CommandRequested;
        public event Action UndoRequested;
        public event Action ReadyRequested;
        public event Action StarterRequested;
        public event Action SpeedRequested;
        public event Action PauseRequested;
        public event Action<string> LaneFocusRequested;
        public event Action<Vec2> MapFocusRequested;
        public event Action<string> CameraRequested;
        public event Action MenuRequested;
        public event Action RematchRequested;
        public event Action SettingsRequested;
        public event Action HeroCommandRequested;

        public LuneMatch Match { get; private set; }
        public int HumanSlot { get; private set; } = 1;
        public LuneHudModel Model { get; private set; }
        public UIDocument Document { get; private set; }
        public PanelSettings Panel { get; private set; }
        public VisualElement Root { get; private set; }
        public float UiScale { get; private set; } = 1f;
        public LuneMinimap Minimap { get; private set; }
        public LuneTooltip Tooltip { get; private set; }
        public LuneHeroCard HeroCard { get; private set; }
        public LuneHeroDetail HeroDetail { get; private set; }
        public LuneChampionPanel ChampionPanel { get; private set; }
        public LuneBossIndicator BossCard { get; private set; }
        public LuneNextWave NextWave { get; private set; }
        public LuneUnitDetail UnitDetail { get; private set; }
        public LuneEventFeed Feed { get; private set; }
        public LuneSettingsPanel Settings { get; private set; }
        public readonly Dictionary<string, LuneLaneIndicator> Lanes = new Dictionary<string, LuneLaneIndicator>();
        public readonly Dictionary<string, LuneUnitCard> ShopCards = new Dictionary<string, LuneUnitCard>();
        public readonly Dictionary<string, LuneArmyChip> Chips = new Dictionary<string, LuneArmyChip>();
        public string SelectedUid { get; private set; } = "";
        /// <summary>Counters for tests and the performance log.</summary>
        public int Syncs { get; private set; }
        public double SyncMs { get; private set; }

        sealed class AncientBlock
        {
            public VisualElement Box;
            public LuneGlyphElement Emblem;
            public Label Caption;
            public LuneStatusBadge Badge;
            public LuneHpBar Bar;
            public Label Value;
            public LuneTowerIndicator[] Towers;
            public float Pulse;
            public bool Own;
            public LuneHudModel.BuildingInfo Data;
        }

        RenderTexture _target;
        VisualElement _hud;
        LunePanel _top;
        readonly List<AncientBlock> _ancients = new List<AncientBlock>();
        Label _wave;
        LuneStatusBadge _phaseBadge;
        VisualElement _system;
        VisualElement _left;
        LuneTeamPanel _team;
        VisualElement _right;
        LunePanel _bottom;
        LuneResourceDisplay _gold;
        LuneButton _undo;
        LuneButton _starter;
        VisualElement _purchase;
        LuneTabBar _purchaseTabs;
        VisualElement _troopRow;
        VisualElement _army;
        Label _armyTitle;
        Label _armyLanes;
        Label _armyValue;
        VisualElement _strip;
        string _chipSignature = "@";
        LunePanel _readyBox;
        LuneButton _readyButton;
        LuneGlyphElement _readyCheck;
        Label _readyNote;
        VisualElement _combatRow;
        Label _clock;
        Label _auto;
        float _readyBlockUntil;
        LuneButton _pause;
        LuneGlyphElement _pauseGlyph;
        LuneButton _speed;
        LunePanel _mapPanel;
        VisualElement _banners;
        string _bannerSignature = "@";
        VisualElement _statusWrap;
        LunePanel _status;
        Label _report;
        Label _toast;
        float _toastLeft;
        LuneModalPanel _modal;
        VisualElement _over;
        Label _overTitle;
        Label _overBody;
        float _tick;
        float _mapTick;
        float _feedTick;
        bool _dirty = true;
        int _lastPhase = -1;
        int _layoutPhase = -1;
        readonly Dictionary<string, bool> _knownAlive = new Dictionary<string, bool>();
        readonly int[] _ancientLevel = new int[2];
        readonly Dictionary<string, bool> _bossSeen = new Dictionary<string, bool>();
        int _heroLevel;
        Vector2 _area;

        // ---------------------------------------------------------------- build
        /// <summary>
        /// Builds the HUD for one seat. target: null for the screen, or a render texture (tests and
        /// captures in batch mode, any resolution).
        /// </summary>
        public void Init(LuneMatch match, int humanSlot, LuneUnitLibrary library, LuneUiAssets assets, RenderTexture target = null)
        {
            // A rebuild (rematch) starts with fresh listeners and a fresh panel.
            CommandRequested = null;
            UndoRequested = null;
            ReadyRequested = null;
            StarterRequested = null;
            SpeedRequested = null;
            PauseRequested = null;
            LaneFocusRequested = null;
            MapFocusRequested = null;
            CameraRequested = null;
            MenuRequested = null;
            RematchRequested = null;
            SettingsRequested = null;
            HeroCommandRequested = null;
            if (Panel != null)
                Destroy(Panel);
            Lanes.Clear();
            ShopCards.Clear();
            Chips.Clear();
            _ancients.Clear();
            _knownAlive.Clear();
            _bossSeen.Clear();
            _chipSignature = "@";
            _bannerSignature = "@";
            SelectedUid = "";
            Match = match;
            HumanSlot = Math.Max(0, humanSlot);
            LuneUi.Assets = assets;
            LunePortraits.Create(library);
            Model = new LuneHudModel(match, HumanSlot);
            _target = target;
            Panel = ScriptableObject.CreateInstance<PanelSettings>();
            Panel.name = "LuneHudPanel";
            Panel.themeStyleSheet = assets != null ? assets.Theme : null;
            Panel.scaleMode = PanelScaleMode.ScaleWithScreenSize;
            Panel.referenceResolution = Reference;
            Panel.screenMatchMode = PanelScreenMatchMode.Expand;
            Panel.sortingOrder = 10;
            if (target != null)
            {
                Panel.targetTexture = target;
                Panel.clearColor = true;
                Panel.colorClearValue = new Color(0f, 0f, 0f, 0f);
            }
            Document = gameObject.GetComponent<UIDocument>() ?? gameObject.AddComponent<UIDocument>();
            Document.panelSettings = Panel;
            Root = Document.rootVisualElement;
            Root.pickingMode = PickingMode.Ignore;
            Root.Clear();
            _hud = new VisualElement { name = "lune-hud", pickingMode = PickingMode.Ignore };
            _hud.style.position = Position.Absolute;
            _hud.style.left = 0f;
            _hud.style.top = 0f;
            _hud.style.right = 0f;
            _hud.style.bottom = 0f;
            Root.Add(_hud);
            BuildTop();
            BuildSystem();
            BuildLeft();
            BuildRight();
            BuildBottom();
            BuildReady();
            BuildMap();
            BuildBanner();
            BuildStatus();
            BuildModal();
            BuildOver();
            Settings = new LuneSettingsPanel();
            _hud.Add(Settings);
            Tooltip = new LuneTooltip();
            _hud.Add(Tooltip);
            _hud.RegisterCallback<PointerMoveEvent>(evt => Tooltip.Pointer = evt.position, TrickleDown.TrickleDown);
            _hud.RegisterCallback<PointerDownEvent>(evt => Tooltip.Pointer = evt.position, TrickleDown.TrickleDown);
            LunePreferences.Changed -= Fit;
            LunePreferences.Changed += Fit;
            Fit();
            RememberBuildings();
            _heroLevel = OwnHeroLevel();
            _lastPhase = -1;
            _dirty = true;
            Sync(0f);
        }

        void OnDestroy()
        {
            LunePreferences.Changed -= Fit;
            if (Panel != null)
                Destroy(Panel);
        }

        LunePanel AddPanel(LunePlateStyle style)
        {
            var panel = new LunePanel(style);
            panel.style.position = Position.Absolute;
            panel.RegisterCallback<WheelEvent>(evt => evt.StopPropagation());
            _hud.Add(panel);
            return panel;
        }

        void BuildTop()
        {
            // A full-width row that centres the panel and lets clicks through elsewhere.
            var wrap = new VisualElement { pickingMode = PickingMode.Ignore };
            wrap.style.position = Position.Absolute;
            wrap.style.left = 0f;
            wrap.style.right = 0f;
            wrap.style.top = Margin;
            wrap.style.flexDirection = FlexDirection.Row;
            wrap.style.justifyContent = Justify.Center;
            _hud.Add(wrap);
            _top = new LunePanel(LunePanels.Hud);
            _top.RegisterCallback<WheelEvent>(evt => evt.StopPropagation());
            wrap.Add(_top);
            VisualElement row = LuneUi.Box(false, 20f, _top);
            for (int side = 0; side < 2; side++)
            {
                AncientBlock block = AncientBlockFor(side == 0);
                _ancients.Add(block);
                row.Add(block.Box);
                if (side == 0)
                {
                    VisualElement center = LuneUi.Box(true, 2f, row);
                    center.style.minWidth = 190f;
                    center.style.alignItems = Align.Center;
                    center.style.justifyContent = Justify.Center;
                    center.pickingMode = PickingMode.Position;
                    _wave = LuneUi.Label("WELLE 1", "HudWave", center);
                    _phaseBadge = new LuneStatusBadge();
                    center.Add(_phaseBadge);
                    LuneTooltip.Attach(center, WaveTip);
                }
            }
        }

        /// <summary>Ancient block: team emblem, name, HP bar and value, the two base towers, critical badge.</summary>
        AncientBlock AncientBlockFor(bool own)
        {
            var block = new AncientBlock { Own = own, Towers = new LuneTowerIndicator[2] };
            block.Box = LuneUi.Box(false, 10f);
            block.Box.style.minWidth = 300f;
            block.Box.pickingMode = PickingMode.Position;
            block.Emblem = LuneUi.Glyph("emblem_0", LuneUiTheme.Team[0], 36f);
            var column = (LuneBox)LuneUi.Box(true, 3f);
            column.style.flexGrow = 1f;
            if (own)
            {
                block.Box.Add(block.Emblem);
                block.Box.Add(column);
            }
            else
            {
                block.Box.Add(column);
                block.Box.Add(block.Emblem);
            }
            VisualElement head = LuneUi.Box(false, 6f, column);
            block.Caption = LuneUi.Label("", "HudCaps");
            block.Badge = new LuneStatusBadge();
            LuneUi.Show(block.Badge, false);
            if (own)
            {
                head.Add(block.Caption);
                LuneUi.Spacer(head);
                head.Add(block.Badge);
            }
            else
            {
                head.Add(block.Badge);
                LuneUi.Spacer(head);
                head.Add(block.Caption);
            }
            block.Bar = new LuneHpBar(240f, 10f) { Ticks = 4 };
            column.Add(block.Bar);
            VisualElement row = LuneUi.Box(false, 5f, column);
            block.Value = LuneUi.Label("", "HudValue");
            Label baseLabel = LuneUi.Label("BASIS", "HudMuted");
            for (int index = 0; index < 2; index++)
                block.Towers[index] = new LuneTowerIndicator(18f, 22f) { Tier = "base" };
            if (own)
            {
                row.Add(block.Value);
                LuneUi.Spacer(row);
                row.Add(baseLabel);
                foreach (LuneTowerIndicator tower in block.Towers)
                    row.Add(tower);
            }
            else
            {
                foreach (LuneTowerIndicator tower in block.Towers)
                    row.Add(tower);
                row.Add(baseLabel);
                LuneUi.Spacer(row);
                row.Add(block.Value);
            }
            LuneTooltip.Attach(block.Box, () => AncientTip(block));
            for (int index = 0; index < 2; index++)
            {
                int captured = index;
                LuneTooltip.Attach(block.Towers[index], () => BaseTip(block, captured));
            }
            return block;
        }

        void BuildSystem()
        {
            _system = LuneUi.Box(false, 6f, _hud);
            _system.style.position = Position.Absolute;
            _system.style.top = Margin;
            _system.style.right = Margin;
            // Pause and tempo live up here, far from Bereit: a late click at the end of a combat must
            // never land on Bereit (found in the G3 playtest).
            _pause = IconButton("pause", "P", _system, out _pauseGlyph);
            LuneUi.Show(_pause, false);
            _pause.Clicked += () => PauseRequested?.Invoke();
            LuneTooltip.Attach(_pause, () => new LuneTip { Title = "Pause", Text = "Hält die Simulation an (offline). Im Netzspiel bestimmt der Host.", Note = "P oder Leertaste" });
            _speed = new LuneButton("1×", LuneButtons.HudIconButton, _system);
            _speed.style.minWidth = 46f;
            _speed.style.height = 36f;
            LuneUi.Show(_speed, false);
            _speed.Clicked += () => SpeedRequested?.Invoke();
            LuneTooltip.Attach(_speed, () => new LuneTip { Title = "Tempo", Text = "Wechselt 1× · 2× · 4×; die Regeln bleiben gleich." });
            LuneButton options = IconButton("gear", "F1", _system, out _);
            options.Clicked += () => SettingsRequested?.Invoke();
            LuneTooltip.Attach(options, () => new LuneTip { Title = "Optionen", Text = "Lautstärke, Vollbild, Bewegung reduzieren, UI-Größe und alle Tasten.", Note = "F1" });
            LuneButton menu = IconButton("menu", "Menü", _system, out _);
            menu.Clicked += () => MenuRequested?.Invoke();
            LuneTooltip.Attach(menu, () => new LuneTip { Title = "Hauptmenü", Text = "Verlässt die Partie." });
        }

        static LuneButton IconButton(string glyph, string text, VisualElement parent, out LuneGlyphElement glyphElement)
        {
            var button = new LuneButton(null, LuneButtons.HudIconButton, parent);
            glyphElement = LuneUi.Glyph(glyph, LuneUiTheme.Text, 15f, button);
            Label label = LuneUi.Label(text, "HudText", button);
            label.style.marginLeft = 5f;
            button.style.minWidth = Mathf.Max(40f, 30f + text.Length * 8.5f);
            button.style.height = 36f;
            return button;
        }

        void BuildLeft()
        {
            _left = LuneUi.Box(true, 8f, _hud);
            _left.style.position = Position.Absolute;
            _left.style.left = Margin;
            _left.style.top = Margin;
            _left.style.width = LeftWidth;
            var lanePanel = new LunePanel(LunePanels.Hud);
            lanePanel.RegisterCallback<WheelEvent>(evt => evt.StopPropagation());
            _left.Add(lanePanel);
            VisualElement column = LuneUi.Box(true, 5f, lanePanel);
            VisualElement head = LuneUi.Box(false, 6f, column);
            LuneUi.Label("LANES", "HudCaps", head);
            LuneUi.Spacer(head);
            LuneUi.Label("Klick oder F2–F4", "HudMuted", head);
            foreach (string lane in LuneMap.Lanes)
            {
                var indicator = new LuneLaneIndicator(lane, LaneKeys[lane]);
                column.Add(indicator);
                string captured = lane;
                indicator.Clicked += () => LaneFocusRequested?.Invoke(captured);
                Lanes[lane] = indicator;
            }
            var teamPanel = new LunePanel(LunePanels.Hud);
            teamPanel.RegisterCallback<WheelEvent>(evt => evt.StopPropagation());
            _left.Add(teamPanel);
            _team = new LuneTeamPanel();
            teamPanel.Add(_team);
            Feed = new LuneEventFeed();
            _left.Add(Feed);
            Feed.FocusRequested += FocusTarget;
        }

        void BuildRight()
        {
            _right = LuneUi.Box(true, 8f, _hud);
            _right.style.position = Position.Absolute;
            _right.style.right = Margin;
            _right.style.top = Margin + 36f + 8f;
            _right.style.width = RightWidth;
            BossCard = new LuneBossIndicator();
            BossCard.RegisterCallback<WheelEvent>(evt => evt.StopPropagation());
            _right.Add(BossCard);
            BossCard.FocusRequested += () => CameraRequested?.Invoke("grotto");
            BossCard.LaneChosen += lane => CommandRequested?.Invoke(Command.BossLaneChoice(lane));
            NextWave = new LuneNextWave();
            NextWave.RegisterCallback<WheelEvent>(evt => evt.StopPropagation());
            _right.Add(NextWave);
            UnitDetail = new LuneUnitDetail();
            UnitDetail.RegisterCallback<WheelEvent>(evt => evt.StopPropagation());
            LuneUi.Show(UnitDetail, false);
            _right.Add(UnitDetail);
            UnitDetail.CommandRequested += command => CommandRequested?.Invoke(command);
            UnitDetail.Closed += ClearSelection;
        }

        void BuildBottom()
        {
            _bottom = AddPanel(LunePanels.Hud);
            _bottom.style.left = Margin;
            _bottom.style.bottom = Margin;
            _bottom.style.right = Margin + MapEdge + 16f + 10f;
            _bottom.style.minHeight = BarPlanning;
            VisualElement row = LuneUi.Box(false, 14f, _bottom);
            row.style.alignItems = Align.FlexStart;
            row.style.flexGrow = 1f;
            // Gold and undo.
            VisualElement goldColumn = LuneUi.Box(true, 4f, row);
            goldColumn.style.minWidth = 150f;
            LuneUi.Label("GOLD", "HudCaps", goldColumn);
            _gold = new LuneResourceDisplay();
            goldColumn.Add(_gold);
            LuneTooltip.Attach(_gold, GoldTip);
            _undo = new LuneButton("Rückgängig", LuneButtons.HudButton, goldColumn);
            _undo.style.alignSelf = Align.FlexStart;
            _undo.Clicked += () => UndoRequested?.Invoke();
            LuneTooltip.Attach(_undo, () => new LuneTip { Title = "Rückgängig", Text = "Nimmt den letzten Befehl dieser Planung zurück (Kauf, Einsatz, Item, Buchung)." });
            // Purchases: troops (1–5) or attack champions.
            _purchase = LuneUi.Box(true, 4f, row);
            _purchaseTabs = new LuneTabBar();
            _purchase.Add(_purchaseTabs);
            _purchaseTabs.AddTab("TRUPPEN · 1–5", "Dauerhafte Truppen", "Bleiben in deiner Armee, kämpfen jede Welle, lassen sich aufwerten.");
            _purchaseTabs.AddTab("ANGRIFFSCHAMPIONS", "Angriffschampions", "Einmalige Söldner: jetzt kaufen, eine Welle später auf der Ziel-Lane angreifen, danach weg.");
            _purchaseTabs.TabChanged += ShowPurchase;
            _troopRow = LuneUi.Box(false, 6f, _purchase);
            _troopRow.style.alignItems = Align.FlexStart;
            for (int index = 0; index < 5; index++)
                _troopRow.Add(new LuneUnitCard());
            ChampionPanel = new LuneChampionPanel();
            LuneUi.Show(ChampionPanel, false);
            _purchase.Add(ChampionPanel);
            ChampionPanel.CommandRequested += command => CommandRequested?.Invoke(command);
            // Own army, ordered by lane.
            _army = LuneUi.Box(true, 4f, row);
            _army.style.flexGrow = 1f;
            _army.style.flexShrink = 1f;
            _army.style.minWidth = 0f;
            _army.RegisterCallback<GeometryChangedEvent>(_ => MarkDirty());
            VisualElement head = LuneUi.Box(false, 8f, _army);
            _armyTitle = LuneUi.Label("ARMEE", "HudCaps", head);
            _armyLanes = LuneUi.Clip(LuneUi.Label("", "HudMuted", head));
            _armyLanes.style.flexGrow = 1f;
            _armyValue = LuneUi.Label("", "HudMuted", head);
            LuneTooltip.Attach(_armyValue, () => new LuneTip { Title = "Armeewert", Glyph = "coin", GlyphColor = LuneUiTheme.Gold,
                Text = "Summe des Einsatzes aller eigenen Truppen (Kauf und Aufwertungen), wie der Armeewert in Legion TD 2." });
            _strip = new VisualElement { pickingMode = PickingMode.Ignore };
            _strip.style.flexDirection = FlexDirection.Row;
            _strip.style.flexWrap = Wrap.Wrap;
            _army.Add(_strip);
            _starter = new LuneButton("Startaufstellung", LuneButtons.HudButton, _army);
            _starter.style.alignSelf = Align.FlexStart;
            _starter.Clicked += () => StarterRequested?.Invoke();
            LuneTooltip.Attach(_starter, StarterTip);
            HeroCard = new LuneHeroCard();
            row.Add(HeroCard);
            HeroCard.Clicked += () => OpenHero();
            HeroCard.CommandRequested += () => HeroCommandRequested?.Invoke();
        }

        void BuildReady()
        {
            _readyBox = AddPanel(LunePanels.HudTight);
            _readyBox.style.right = Margin;
            _readyBox.style.bottom = Margin + MapEdge + 16f + 8f;
            _readyBox.style.width = MapEdge + 16f;
            _readyBox.style.height = ReadyHeight;
            VisualElement column = LuneUi.Box(true, 2f, _readyBox);
            column.style.flexGrow = 1f;
            _readyButton = new LuneButton("BEREIT", LuneButtons.Primary, column);
            _readyButton.style.height = 44f;
            _readyButton.style.paddingTop = 0f;
            _readyButton.style.paddingBottom = 0f;
            _readyButton.Clicked += () =>
            {
                if (!ReadyBlocked())
                    ReadyRequested?.Invoke();
            };
            LuneTooltip.Attach(_readyButton, ReadyTip);
            _readyCheck = LuneUi.Glyph("check", LuneUiTheme.Ink, 22f, _readyButton);
            _readyCheck.style.position = Position.Absolute;
            _readyCheck.style.left = 16f;
            LuneUi.Show(_readyCheck, false);
            _readyNote = LuneUi.Label("Leertaste", "HudMuted", column);
            _readyNote.style.unityTextAlign = TextAnchor.MiddleCenter;
            _combatRow = LuneUi.Box(false, 8f, column);
            _combatRow.style.justifyContent = Justify.Center;
            _combatRow.style.flexGrow = 1f;
            LuneUi.Show(_combatRow, false);
            LuneUi.Glyph("melee", LuneUiTheme.Lightened(LuneUiTheme.Danger, .15f), 16f, _combatRow);
            _clock = LuneUi.Label("", "HudValue", _combatRow);
            _auto = LuneUi.Clip(LuneUi.Label("", "HudMuted", _combatRow));
        }

        void BuildMap()
        {
            _mapPanel = AddPanel(LunePanels.HudTight);
            _mapPanel.style.right = Margin;
            _mapPanel.style.bottom = Margin;
            _mapPanel.style.width = MapEdge + 16f;
            _mapPanel.style.height = MapEdge + 16f;
            Minimap = new LuneMinimap { Match = Match, HumanSlot = HumanSlot };
            Minimap.style.flexGrow = 1f;
            _mapPanel.Add(Minimap);
            Minimap.FocusRequested += point => MapFocusRequested?.Invoke(point);
            LuneTooltip.Attach(Minimap, () => new LuneTip
            {
                Title = "Minimap", Text = "Klicken oder ziehen bewegt die Kamera. Runde Marker: Blau · eckige Marker: Rot. Krone: Boss, Pfeil: Angriffschampion, Porträt im Goldring: Held.",
                Note = "Die Minimap löst nie Käufe oder Befehle aus.",
            });
        }

        void BuildBanner()
        {
            _banners = LuneUi.Box(true, 6f, _hud);
            _banners.style.position = Position.Absolute;
        }

        void BuildStatus()
        {
            _statusWrap = new VisualElement { pickingMode = PickingMode.Ignore };
            _statusWrap.style.position = Position.Absolute;
            _statusWrap.style.left = Margin;
            _statusWrap.style.right = Margin + MapEdge + 16f + 10f;
            _statusWrap.style.flexDirection = FlexDirection.Row;
            _statusWrap.style.justifyContent = Justify.Center;
            _hud.Add(_statusWrap);
            _status = new LunePanel(LunePanels.HudTight);
            _statusWrap.Add(_status);
            VisualElement column = LuneUi.Box(true, 0f, _status);
            _report = LuneUi.Label("", "HudText", column);
            _report.style.unityTextAlign = TextAnchor.MiddleCenter;
            _toast = LuneUi.Label("", "HudMuted", column);
            _toast.style.unityTextAlign = TextAnchor.MiddleCenter;
            LuneUi.Show(_statusWrap, false);
        }

        void BuildModal()
        {
            _modal = new LuneModalPanel(new Vector2(1040f, 660f));
            _hud.Add(_modal);
            HeroDetail = new LuneHeroDetail();
            _modal.Body.Add(HeroDetail);
            HeroDetail.CommandRequested += command => CommandRequested?.Invoke(command);
        }

        void BuildOver()
        {
            _over = new VisualElement();
            _over.style.position = Position.Absolute;
            _over.style.left = 0f;
            _over.style.top = 0f;
            _over.style.right = 0f;
            _over.style.bottom = 0f;
            _over.style.backgroundColor = new Color(.02f, .03f, .04f, .82f);
            _over.style.justifyContent = Justify.Center;
            _over.style.alignItems = Align.Center;
            _over.RegisterCallback<WheelEvent>(evt => evt.StopPropagation());
            LuneUi.Show(_over, false);
            _hud.Add(_over);
            var panel = new LunePanel(LunePanels.Menu);
            panel.style.minWidth = 620f;
            _over.Add(panel);
            VisualElement column = LuneUi.Box(true, 14f, panel);
            column.style.alignItems = Align.Center;
            _overTitle = LuneUi.Label("", "TitleLabel", column, 60f);
            _overBody = LuneUi.Wrap(LuneUi.Label("", "BodyLabel", column));
            _overBody.style.unityTextAlign = TextAnchor.MiddleCenter;
            _overBody.style.maxWidth = 560f;
            VisualElement row = LuneUi.Box(false, 12f, column);
            row.style.justifyContent = Justify.Center;
            new LuneButton("NEUE PARTIE", LuneButtons.Primary, row).Clicked += () => RematchRequested?.Invoke();
            new LuneButton("Menü", LuneButtons.Secondary, row).Clicked += () => MenuRequested?.Invoke();
        }

        // ---------------------------------------------------------------- layout
        /// <summary>Size of the render target in pixels (screen or texture).</summary>
        public Vector2 TargetSize { get { return _target != null ? new Vector2(_target.width, _target.height) : new Vector2(Screen.width, Screen.height); } }

        /// <summary>
        /// Logical area at UI scale 1 (Godot: content scale canvas_items/expand from 1600×960) and
        /// the UI scale: the preference, capped so the layout always has MinArea logical pixels.
        /// </summary>
        public static float ScaleFor(Vector2 pixels, float wanted, out Vector2 area)
        {
            float k = Mathf.Min(pixels.x / Reference.x, pixels.y / Reference.y);
            area = pixels / Mathf.Max(.0001f, k);
            float fits = Mathf.Min(area.x / MinArea.x, area.y / MinArea.y);
            return Mathf.Clamp(Mathf.Min(Mathf.Clamp(wanted, .75f, 1.5f), fits), .6f, 1.5f);
        }

        void Fit()
        {
            if (Panel == null)
                return;
            UiScale = ScaleFor(TargetSize, LunePreferences.UiScale, out _area);
            Panel.scale = UiScale;
            Layout();
        }

        /// <summary>Logical size of the HUD (area / UI scale).</summary>
        public Vector2 LogicalSize { get { return _area / Mathf.Max(.0001f, UiScale); } }

        void Layout()
        {
            if (_over == null)
                return;
            Vector2 size = LogicalSize;
            bool planning = Match == null || Match.Phase == Phase.Planning;
            _readyBox.style.height = planning ? ReadyHeight : ReadyCombat;
            _bottom.style.minHeight = planning ? BarPlanning : BarCombat;
            float bannerWidth = Mathf.Min(700f, size.x - 2f * (LeftWidth + 2f * Margin));
            _banners.style.width = bannerWidth;
            _banners.style.left = Mathf.Floor((size.x - bannerWidth) * .5f);
            float topHeight = float.IsNaN(_top.layout.height) || _top.layout.height <= 0f ? 96f : _top.layout.height;
            _banners.style.top = Margin + topHeight + 8f;
            float barHeight = float.IsNaN(_bottom.layout.height) || _bottom.layout.height <= 0f ? (planning ? BarPlanning : BarCombat) : _bottom.layout.height;
            _statusWrap.style.bottom = Margin + barHeight + 8f;
            float systemHeight = float.IsNaN(_system.layout.height) || _system.layout.height <= 0f ? 36f : _system.layout.height;
            _right.style.top = Margin + systemHeight + 8f;
            _layoutPhase = Match != null ? (int)Match.Phase : -1;
        }

        /// <summary>Rectangles of the main regions in logical pixels (layout tests).</summary>
        public Dictionary<string, Rect> Regions()
        {
            var result = new Dictionary<string, VisualElement>
            {
                { "top", _top }, { "system", _system }, { "left", _left }, { "right", _right }, { "bottom", _bottom }, { "ready", _readyBox }, { "minimap", _mapPanel },
            };
            var rects = new Dictionary<string, Rect>();
            foreach (KeyValuePair<string, VisualElement> pair in result)
            {
                if (LuneUi.Visible(pair.Value))
                    rects[pair.Key] = _hud.WorldToLocal(pair.Value.worldBound);
            }
            return rects;
        }

        // ---------------------------------------------------------------- per frame
        void Update()
        {
            if (Match == null)
                return;
            float delta = Time.unscaledDeltaTime;
            Tick(delta);
        }

        /// <summary>One HUD frame (Godot _process); tests call it with simulated time.</summary>
        public void Tick(float delta)
        {
            Tooltip.Tick(delta);
            _gold.Tick(delta);
            Feed.Tick(delta);
            _toastLeft -= delta;
            if (_toastLeft <= 0f && _toast.text.Length > 0)
            {
                _toast.text = "";
                StatusVisibility();
            }
            foreach (AncientBlock block in _ancients)
            {
                if (block.Pulse <= 0f)
                    continue;
                block.Pulse = Mathf.Max(0f, block.Pulse - delta);
                block.Bar.style.opacity = block.Pulse > 0f ? .45f + .55f * Mathf.Abs(Mathf.Cos(block.Pulse * Mathf.PI * 2f)) : 1f;
            }
            _tick += delta;
            _mapTick += delta;
            _feedTick += delta;
            bool fighting = Match.Phase == Phase.Combat;
            if (fighting && _mapTick >= MapRate)
            {
                _mapTick = 0f;
                Minimap.Refresh(Match.Announcements());
            }
            if (_feedTick >= FeedRate)
            {
                TrackEvents();
                _feedTick = 0f;
            }
            if (_dirty || (int)Match.Phase != _lastPhase || _tick >= (fighting ? CombatRate : PlanningRate))
            {
                var watch = System.Diagnostics.Stopwatch.StartNew();
                Sync(_tick);
                _tick = 0f;
                _dirty = false;
                Syncs++;
                SyncMs = SyncMs <= 0.0 ? watch.Elapsed.TotalMilliseconds : SyncMs + (watch.Elapsed.TotalMilliseconds - SyncMs) * .2;
            }
        }

        public void MarkDirty()
        {
            _dirty = true;
        }

        /// <summary>True for one second after a combat ended: Bereit (click or Space) is ignored meanwhile.</summary>
        public bool ReadyBlocked()
        {
            return Time.realtimeSinceStartup < _readyBlockUntil;
        }

        void Sync(float delta)
        {
            int phase = (int)Match.Phase;
            if (phase != _lastPhase)
            {
                PhaseChanged(_lastPhase, phase);
                _lastPhase = phase;
            }
            if (_layoutPhase != phase)
                Layout();
            bool planning = Model.Planning;
            bool fighting = Model.Fighting;
            SyncTop();
            bool reduced = LunePreferences.ReducedMotion;
            foreach (KeyValuePair<string, LuneLaneIndicator> pair in Lanes)
                pair.Value.Apply(Model.Lane(pair.Key), Model.Team, delta, reduced);
            _team.Apply(Model.Members(Model.Team), Model.Team, planning, Model.Networked);
            SyncRight(planning, fighting);
            SyncBottom(planning, fighting);
            SyncReady(planning, fighting);
            SyncBanners();
            if (!fighting)
            {
                Minimap.ViewerTeam = Model.Team;
                Minimap.HumanSlot = HumanSlot;
                Minimap.Refresh(Match.Announcements());
            }
            if (_modal.Open)
            {
                HeroDetail.Apply(Model);
                _modal.Title.text = HeroDetail.TitleText(Model);
            }
            LuneUi.Show(_over, Model.Over);
            if (Model.Over)
            {
                int own = Model.Team;
                _overTitle.text = Match.Winner == LuneMatch.Draw ? "UNENTSCHIEDEN" : Match.Winner == own ? "SIEG" : "NIEDERLAGE";
                _overBody.text = Match.EndNote + "\nNach " + Match.RoundNumber + " Wellen.";
            }
        }

        void SyncTop()
        {
            for (int side = 0; side < 2; side++)
            {
                int team = side == 0 ? Model.Team : Model.Enemy;
                AncientBlock block = _ancients[side];
                LuneHudModel.BuildingInfo ancient = Model.Ancient(team);
                block.Data = ancient;
                Color tint = LuneUiTheme.TeamColor(team);
                block.Emblem.Glyph = "emblem_" + team;
                block.Emblem.Color = tint;
                block.Caption.text = (side == 0 ? "DEIN ANCIENT · " : "GEGNER · ") + LuneUi.Upper(LuneUiTheme.TeamName(team));
                block.Bar.Fraction = (float)ancient.Fraction;
                block.Bar.Fill = LuneHpBar.HealthColor(block.Bar.Fraction, tint);
                block.Value.text = LuneUiTheme.Number(ancient.Hp) + " / " + LuneUiTheme.Number(ancient.MaxHp);
                for (int index = 0; index < 2; index++)
                {
                    LuneHudModel.BuildingInfo baseTower = ancient.Base[index];
                    block.Towers[index].Team = team;
                    block.Towers[index].SetState(baseTower.Alive, (float)baseTower.Fraction, baseTower.Attackable);
                }
                int level = block.Bar.Fraction < .3f ? 2 : block.Bar.Fraction < .5f ? 1 : 0;
                bool show = level > 0 || !ancient.Alive;
                if (!ancient.Alive)
                    block.Badge.SetState("ZERSTÖRT", LuneUiTheme.Danger, "close", true);
                else if (level == 2)
                    block.Badge.SetState("KRITISCH", LuneUiTheme.Danger, "warning", true);
                else if (level == 1)
                    block.Badge.SetState("BESCHÄDIGT", LuneUiTheme.Warn);
                else if (ancient.Attackable)
                {
                    show = true;
                    block.Badge.SetState("ANGREIFBAR", LuneUiTheme.Warn);
                }
                LuneUi.Show(block.Badge, show);
            }
            _wave.text = "WELLE " + Match.RoundNumber;
            if (Model.Over)
                _phaseBadge.SetState("PARTIE BEENDET", LuneUiTheme.Muted);
            else if (Model.Fighting)
            {
                int elapsed = (int)Match.Combat.Elapsed;
                _phaseBadge.SetState(string.Format("KAMPF · {0:00}:{1:00}", elapsed / 60, elapsed % 60), LuneUiTheme.Lightened(LuneUiTheme.Danger, .1f), "melee");
            }
            else if (Model.Locked)
                _phaseBadge.SetState("PLANUNG · BEREIT", LuneUiTheme.Good, "check");
            else
                _phaseBadge.SetState("PLANUNG", LuneUiTheme.BronzeLight, "clock");
        }

        void SyncRight(bool planning, bool fighting)
        {
            LuneHudModel.BossInfo boss = Model.Boss();
            BossCard.Apply(boss, Model.Team, Match.RoundNumber, planning);
            if (boss.HasHp)
                BossCard.SetBossHp((float)(boss.Hp / Math.Max(1.0, boss.MaxHp)));
            RosterEntry entry = SelectedEntry();
            if (entry == null && SelectedUid.Length > 0)
                SelectedUid = "";
            LuneUi.Show(UnitDetail, entry != null);
            BossCard.SetCompact(entry != null);
            if (entry != null)
                UnitDetail.Apply(entry, Model, Model.LiveUnit(SelectedUid));
            bool wave = entry == null && !Model.Over;
            LuneUi.Show(NextWave, wave);
            if (wave)
                NextWave.Apply(Model.NextWave(), Model.Team, fighting);
        }

        RosterEntry SelectedEntry()
        {
            if (SelectedUid.Length == 0)
                return null;
            return Model.OwnRoster.FirstOrDefault(e => e.Uid == SelectedUid);
        }

        void SyncBottom(bool planning, bool fighting)
        {
            _gold.SetValues(Model.OwnGold, Model.Income, !Model.Over);
            List<RosterEntry> roster = Model.OwnRoster;
            bool locked = Model.Locked;
            bool canAct = planning && !locked;
            LuneUi.Show(_purchase, planning);
            LuneUi.Show(_army, !planning || !LuneUi.Visible(ChampionPanel));
            LuneUi.Show(_undo, planning);
            _undo.Disabled = !canAct || Model.Me.Undo.Count == 0;
            LuneUi.Show(_starter, planning && roster.Count == 0);
            _starter.Disabled = !canAct;
            if (planning)
            {
                List<string> ids = Match.BaseIds(Model.Me.Bund);
                int gold = Model.OwnGold;
                bool full = roster.Count >= Model.SupplyCap;
                if (!ShopCards.ContainsKey(ids[0]))
                {
                    ShopCards.Clear();
                    for (int index = 0; index < ids.Count; index++)
                    {
                        var card = (LuneUnitCard)_troopRow[index];
                        string id = ids[index];
                        UnitDef data = DataCatalog.GetUnit(id);
                        card.Setup(id, id, data.DisplayName, Model.RoleOf(id), data.Cost, (index + 1).ToString(), false, data);
                        if (card.userData == null)
                        {
                            card.userData = "wired";
                            card.Clicked += () => CommandRequested?.Invoke(Command.Buy(card.TypeId));
                            LuneTooltip.Attach(card, () => LuneStats.TroopTip(card.TypeId, Model.RoleOf(card.TypeId), card.Reason));
                        }
                        ShopCards[id] = card;
                    }
                }
                foreach (LuneUnitCard card in ShopCards.Values)
                {
                    string why = "";
                    if (locked)
                        why = "Bereit gemeldet – die Planung ist verbindlich.";
                    else if (full)
                        why = "Armee voll (" + roster.Count + "/" + Model.SupplyCap + ").";
                    else if (gold < card.Cost)
                        why = "Es fehlen " + (card.Cost - gold) + " Gold.";
                    card.SetAvailable(why.Length == 0, why, locked, gold < card.Cost);
                }
                if (LuneUi.Visible(ChampionPanel))
                    ChampionPanel.Apply(Model);
            }
            _armyTitle.text = "ARMEE " + roster.Count + "/" + Model.SupplyCap;
            var perLane = new Dictionary<string, int>();
            var aliveLane = new Dictionary<string, int>();
            int value = 0;
            foreach (RosterEntry entry in roster)
            {
                perLane[entry.Lane] = perLane.TryGetValue(entry.Lane, out int count) ? count + 1 : 1;
                value += entry.Invested;
                if (fighting)
                {
                    LuneUnit unit = Model.LiveUnit(entry.Uid);
                    if (unit != null && unit.Alive)
                        aliveLane[entry.Lane] = aliveLane.TryGetValue(entry.Lane, out int alive) ? alive + 1 : 1;
                }
            }
            var parts = new List<string>();
            foreach (string lane in LuneMap.Lanes.Concat(new[] { LuneMatch.Grotto }))
            {
                if (!perLane.ContainsKey(lane))
                    continue;
                string shortName = lane == LuneMatch.Grotto ? "GROTTE" : LuneUi.Upper(LuneMap.LaneNames[lane]);
                parts.Add(fighting ? shortName + " " + aliveLane.GetValueOrDefault(lane, 0) + "/" + perLane[lane] : shortName + " " + perLane[lane]);
            }
            _armyLanes.text = string.Join(" · ", parts);
            _armyValue.text = roster.Count > 0 ? "Wert " + LuneUiTheme.Number(value) : "";
            SyncChips(roster, fighting);
            HeroState hero = Model.OwnHero;
            HeroCard.Apply(hero, Model, hero != null ? Model.LiveUnit(hero.Uid) : null);
        }

        void SyncChips(List<RosterEntry> roster, bool fighting)
        {
            var order = LuneMap.Lanes.Concat(new[] { LuneMatch.Grotto }).ToList();
            List<RosterEntry> ordered = roster.OrderBy(e => order.IndexOf(e.Lane)).ThenBy(e => e.Seq).ToList();
            float edge = ChipEdge(ordered.Count, fighting);
            string signature = string.Join(",", ordered.Select(e => e.Uid + ":" + e.TypeId + ":" + e.Lane)) + "|" + (int)edge;
            if (signature != _chipSignature)
            {
                _chipSignature = signature;
                _strip.Clear();
                Chips.Clear();
                foreach (RosterEntry entry in ordered)
                    Chips[entry.Uid] = MakeChip(entry, edge);
            }
            foreach (KeyValuePair<string, LuneArmyChip> pair in Chips)
            {
                pair.Value.On = pair.Key == SelectedUid;
                if (fighting)
                {
                    LuneUnit unit = Model.LiveUnit(pair.Key);
                    pair.Value.Fallen = unit == null || !unit.Alive;
                }
                else
                {
                    pair.Value.Fallen = false;
                }
            }
        }

        /// <summary>Largest chip edge (46 … 30 px) at which the whole army fits into the strip.</summary>
        float ChipEdge(int count, bool fighting)
        {
            float width = !float.IsNaN(_army.layout.width) && _army.layout.width > 60f ? _army.layout.width : 300f;
            float height = (fighting ? BarCombat : BarPlanning) - 20f - 26f;
            foreach (float edge in new[] { 46f, 42f, 38f, 34f, 30f })
            {
                int perRow = Math.Max(1, (int)Math.Floor((width + 4f) / (edge + 4f)));
                int rows = (int)Math.Ceiling(count / (double)perRow);
                if (rows * (edge + LuneArmyChip.Band + 4f) <= height)
                    return edge;
            }
            return 30f;
        }

        LuneArmyChip MakeChip(RosterEntry entry, float edge)
        {
            var chip = new LuneArmyChip();
            chip.style.marginRight = 4f;
            chip.style.marginBottom = 4f;
            _strip.Add(chip);
            chip.Setup(entry, edge);
            string uid = entry.Uid;
            chip.Clicked += () =>
            {
                if (SelectedUid == uid)
                    ClearSelection();
                else
                    SelectUnit(uid);
            };
            string type = entry.TypeId;
            string lane = entry.Lane;
            LuneTooltip.Attach(chip, () =>
            {
                LuneTip tip = LuneStats.TroopTip(type, Model.RoleOf(type));
                tip.Note = "Einsatz: " + (lane == LuneMatch.Grotto ? "Grotte" : LuneMap.LaneNames[lane]) + " · Klick: Details, Aufwerten, Einsatz";
                if (chip.Fallen)
                    tip.Warn = "In diesem Kampf gefallen; kehrt zur nächsten Planung zurück.";
                return tip;
            });
            return chip;
        }

        void SyncReady(bool planning, bool fighting)
        {
            LuneUi.Show(_readyBox, !Model.Over);
            LuneUi.Show(_readyButton, planning);
            LuneUi.Show(_readyNote, planning);
            LuneUi.Show(_combatRow, fighting);
            LuneUi.Show(_pause, fighting);
            LuneUi.Show(_speed, fighting);
            if (planning)
            {
                bool locked = Model.Locked;
                _readyButton.Disabled = locked || ReadyBlocked();
                _readyButton.Text = "BEREIT";
                LuneUi.Show(_readyCheck, locked);
                if (locked)
                {
                    Model.ReadyCount(out int ready, out int humans);
                    _readyNote.text = humans > ready ? "Warte auf " + Math.Max(0, humans - ready) + " Mitspieler" : "Kampf beginnt …";
                }
                else
                {
                    _readyNote.text = "Leertaste · startet Welle " + Match.RoundNumber;
                }
            }
            if (fighting)
            {
                int elapsed = (int)Match.Combat.Elapsed;
                _clock.text = string.Format("KAMPF {0:00}:{1:00}", elapsed / 60, elapsed % 60);
                _auto.text = "Tempo " + _speed.Text;
                bool guest = Model.IsGuest;
                _pause.Disabled = guest;
                _speed.Disabled = guest;
            }
        }

        void SyncBanners()
        {
            var lines = new List<(string text, string glyph, bool own, LuneFocusTarget target)>();
            LuneHudModel.BossInfo boss = Model.Boss();
            if (boss.State == "deploy_next" || boss.State == "deploying")
            {
                bool own = boss.Own;
                string lane = LuneUi.Upper(LuneMap.LaneNames.TryGetValue(boss.Lane, out string name) ? name : "?");
                string text = own
                    ? "Deine SCHLUNDKRONE greift in Welle " + boss.DeployRound + " auf " + lane + " an · Kopfgeld für den Gegner " + LuneUiTheme.Number(boss.Bounty) + " Gold"
                    : "SCHLUNDKRONE (" + LuneUiTheme.TeamName(boss.Team) + ") greift in Welle " + boss.DeployRound + " auf " + lane + " an · Kopfgeld für euch " + LuneUiTheme.Number(boss.Bounty) + " Gold";
                lines.Add((text, "crown", own, LuneFocusTarget.ForLane(boss.Lane)));
            }
            LuneHudModel.BuildingInfo core = Model.Ancient(Model.Team);
            if (core.Alive && core.Fraction < .3)
                lines.Add(("Dein Ancient ist kritisch: " + LuneUiTheme.Round(core.Fraction * 100.0) + " % Leben", "warning", false, LuneFocusTarget.ForCamera("base")));
            string signature = string.Join("|", lines.Select(l => l.text + l.glyph + l.own));
            if (signature == _bannerSignature)
                return;
            _bannerSignature = signature;
            _banners.Clear();
            foreach (var line in lines)
            {
                var panel = new LunePanel(line.own ? LunePanels.BannerOwn : LunePanels.BannerDanger);
                panel.RegisterCallback<WheelEvent>(evt => evt.StopPropagation());
                _banners.Add(panel);
                VisualElement row = LuneUi.Box(false, 10f, panel);
                row.style.justifyContent = Justify.Center;
                LuneUi.Glyph(line.glyph, line.own ? LuneUiTheme.TeamColor(Model.Team) : LuneUiTheme.Danger, 20f, row);
                Label label = LuneUi.Wrap(LuneUi.Label(line.text, "HudValue", row));
                label.style.unityTextAlign = TextAnchor.MiddleCenter;
                label.style.flexGrow = 1f;
                LuneFocusTarget target = line.target;
                panel.RegisterCallback<PointerDownEvent>(evt =>
                {
                    if (evt.button == 0)
                        FocusTarget(target);
                });
            }
        }

        void StatusVisibility()
        {
            LuneUi.Show(_statusWrap, _report.text.Length > 0 || _toast.text.Length > 0);
            LuneUi.Show(_report, _report.text.Length > 0);
            LuneUi.Show(_toast, _toast.text.Length > 0);
        }

        // ---------------------------------------------------------------- phase changes and events
        void PhaseChanged(int previous, int phase)
        {
            if (phase == (int)Phase.Combat)
            {
                CloseModal();
                _report.text = "";
                StatusVisibility();
                foreach (Announcement entry in Match.Announcements())
                {
                    bool own = entry.Team == Model.Team;
                    string lane = LuneUi.Upper(LuneMap.LaneNames[entry.Lane]);
                    if (entry.Kind == "boss")
                        Feed.Push(lane + " – Schlundkrone (" + LuneUiTheme.TeamName(entry.Team) + ") greift an", own ? "good" : "danger", "crown", LuneFocusTarget.ForLane(entry.Lane));
                    else
                        Feed.Push(lane + " – Angriffschampion " + LuneContent.Champions[entry.ChampionId].Name + " (" + LuneUiTheme.TeamName(entry.Team) + ") erschienen", own ? "info" : "warn", "champion", LuneFocusTarget.ForLane(entry.Lane));
                }
            }
            else if (phase == (int)Phase.Planning && previous == (int)Phase.Combat)
            {
                _readyBlockUntil = Time.realtimeSinceStartup + 1f;
                ReportSettlement();
            }
            else if (phase == (int)Phase.Planning && previous < 0 && Match.LastSettlement != null)
            {
                ReportSettlement();
            }
            _bossSeen.Clear();
            Layout();
        }

        void ReportSettlement()
        {
            Settlement s = Match.LastSettlement;
            if (s == null)
                return;
            int kills = s.Gains[HumanSlot];
            int gained = kills + s.Income;
            _report.text = string.Format("Welle {0} abgeschlossen ({1}, {2}s) · dein Ertrag +{3} Gold (Kills {4}, Einkommen {5})", s.Round, Reason(s.EndReason), (int)s.CombatTime, gained, kills, s.Income);
            StatusVisibility();
            Feed.Push("Welle " + s.Round + " abgeschlossen · +" + gained + " Gold", "info", "coin");
            BossClaim claim = Match.Boss.Claim;
            if (s.Boss == "won" && claim != null)
            {
                bool own = claim.Team == Model.Team;
                Feed.Push("Boss in Welle " + claim.DeployRound + " auf " + LuneUi.Upper(LuneMap.LaneNames[claim.Lane]) + " (" + LuneUiTheme.TeamName(claim.Team) + ")", own ? "good" : "danger", "crown", LuneFocusTarget.ForLane(claim.Lane));
            }
            int level = OwnHeroLevel();
            if (level > _heroLevel && _heroLevel > 0)
                Feed.Push(LuneContent.Heroes[Model.OwnHero.HeroId].Name + " erreicht Stufe " + level, "good", "star", LuneFocusTarget.ForCamera("hero"));
            _heroLevel = level;
        }

        int OwnHeroLevel()
        {
            HeroState hero = Model.OwnHero;
            return hero == null ? 0 : LuneContent.LevelFor(hero.Xp);
        }

        void RememberBuildings()
        {
            _knownAlive.Clear();
            foreach (BuildingDef definition in Match.Map.Buildings)
                _knownAlive[definition.Id] = Model.Building(definition.Id).Alive;
        }

        /// <summary>Diffs public state for the event feed: fallen buildings, Ancient thresholds, the boss.</summary>
        void TrackEvents()
        {
            if (Model.Over && _knownAlive.Count == 0)
                return;
            foreach (BuildingDef definition in Match.Map.Buildings)
            {
                string id = definition.Id;
                bool alive = Model.Building(id).Alive;
                if (_knownAlive.GetValueOrDefault(id, alive) && !alive)
                {
                    bool own = definition.Team == Model.Team;
                    string place = definition.Lane == "base" ? "BASIS" : LuneUi.Upper(LuneMap.LaneNames.TryGetValue(definition.Lane, out string name) ? name : definition.Lane);
                    Feed.Push(place + " – " + LuneHudModel.BuildingTitle(id) + " (" + LuneUiTheme.TeamName(definition.Team) + ") zerstört", own ? "danger" : "good", "tower", LuneFocusTarget.ForPoint(definition.Position));
                }
                _knownAlive[id] = alive;
            }
            for (int side = 0; side < 2; side++)
            {
                int team = side == 0 ? Model.Team : Model.Enemy;
                LuneHudModel.BuildingInfo core = Model.Ancient(team);
                int level = core.Fraction < .3 ? 2 : core.Fraction < .5 ? 1 : 0;
                if (level > _ancientLevel[side] && core.Alive && level == 2)
                {
                    int percent = LuneUiTheme.Round(core.Fraction * 100.0);
                    Feed.Push(side == 0 ? "Dein Ancient kritisch (" + percent + " %)" : "Gegnerischer Ancient kritisch (" + percent + " %)", side == 0 ? "danger" : "good", "warning",
                        LuneFocusTarget.ForCamera(side == 0 ? "base" : "enemy_base"));
                    if (!LunePreferences.ReducedMotion)
                        _ancients[side].Pulse = 1.5f;
                }
                _ancientLevel[side] = level;
            }
            if (!Model.Fighting)
                return;
            foreach (LuneUnit unit in Match.Combat.Units)
            {
                if (unit.Kind != "boss")
                    continue;
                string key = unit.Zone + "-" + unit.Id;
                bool was = _bossSeen.GetValueOrDefault(key, unit.Alive);
                if (was && !unit.Alive)
                {
                    if (unit.Zone == "grotto")
                    {
                        LuneHudModel.BossInfo boss = Model.Boss();
                        if (boss.Team >= 0)
                            Feed.Push("Bossgrotte erobert – " + LuneUiTheme.TeamName(boss.Team), boss.Own ? "good" : "warn", "crown", LuneFocusTarget.ForCamera("grotto"));
                    }
                    else
                    {
                        Feed.Push("SCHLUNDKRONE besiegt (" + LuneUi.Upper(LuneMap.LaneNames.TryGetValue(unit.Lane, out string name) ? name : "") + ")", unit.Team != Model.Team ? "good" : "warn", "crown", LuneFocusTarget.ForLane(unit.Lane));
                    }
                }
                _bossSeen[key] = unit.Alive;
            }
        }

        void FocusTarget(LuneFocusTarget target)
        {
            if (target == null)
                return;
            if (target.Lane.Length > 0 && Array.IndexOf(LuneMap.Lanes, target.Lane) >= 0)
                LaneFocusRequested?.Invoke(target.Lane);
            else if (target.Point.HasValue)
                MapFocusRequested?.Invoke(target.Point.Value);
            else if (target.Camera.Length > 0)
                CameraRequested?.Invoke(target.Camera);
        }

        static string Reason(string reason)
        {
            return reason == "cleared" ? "alle Einheiten gefallen" : reason == "timeout" ? "Zeitfenster abgelaufen" : reason == "core" ? "Ancient zerstört" : reason;
        }

        // ---------------------------------------------------------------- public API
        public void Notify(string message, bool error = false)
        {
            _toast.text = message ?? "";
            LuneUi.SetColor(_toast, error ? LuneUiTheme.Danger : LuneUiTheme.Good);
            _toastLeft = 5f;
            StatusVisibility();
            _dirty = true;
        }

        public string ToastText { get { return _toast.text; } }

        /// <summary>The Ancient bar of a side (0 own, 1 enemy) pulses after turning critical (off with reduced motion).</summary>
        public bool AncientPulsing(int side) { return _ancients[side].Pulse > 0f; }
        public string ReportText { get { return _report.text; } }

        public void SetSpeedLabel(int value, bool paused)
        {
            _speed.Text = value + "×";
            _pauseGlyph.Glyph = paused ? "play" : "pause";
        }

        /// <summary>G2 compatibility: 0 = troops, 1 = hero, 2 = attack champions.</summary>
        public void ShowPage(int index)
        {
            if (index == 1)
            {
                OpenHero();
                return;
            }
            CloseModal();
            if (index == 2)
                OpenChampions();
            else
                OpenTroops();
        }

        public void OpenHero(int tab = LuneHeroDetail.TabValues)
        {
            HeroDetail.Tab = tab;
            HeroDetail.ShowTab(tab);
            HeroDetail.Apply(Model);
            _modal.OpenWith(HeroDetail.TitleText(Model));
        }

        public void OpenItems() { OpenHero(LuneHeroDetail.TabItems); }
        public void OpenTalents() { OpenHero(LuneHeroDetail.TabTalents); }
        public void CloseModal() { _modal.Close(); }
        public bool ModalOpen { get { return _modal.Open; } }

        public void OpenChampions()
        {
            _purchaseTabs.Select(1);
            ShowPurchase(1);
        }

        public void OpenTroops()
        {
            _purchaseTabs.Select(0);
            ShowPurchase(0);
        }

        void ShowPurchase(int index)
        {
            LuneUi.Show(_troopRow, index == 0);
            LuneUi.Show(ChampionPanel, index == 1);
            LuneUi.Show(_army, index == 0);
            _purchase.style.flexGrow = index == 1 ? 1f : 0f;
            _dirty = true;
            if (index == 1)
                ChampionPanel.Apply(Model);
        }

        public void SelectUnit(string uid)
        {
            SelectedUid = uid ?? "";
            _dirty = true;
        }

        public void ClearSelection()
        {
            SelectedUid = "";
            _dirty = true;
        }

        /// <summary>Esc: closes the options, the hero window or the selection (in this order); false if nothing was open.</summary>
        public bool HandleEscape()
        {
            if (Settings.Open)
            {
                Settings.Close();
                return true;
            }
            if (_modal.Open)
            {
                CloseModal();
                return true;
            }
            if (SelectedUid.Length > 0)
            {
                ClearSelection();
                return true;
            }
            return false;
        }

        public string PublicDigest() { return Model.PublicDigest(); }

        /// <summary>
        /// Whether a screen point (pixels, origin bottom left as Input.mousePosition) lies on a HUD
        /// element that takes the mouse: then the world must not react (wheel zoom, field clicks).
        /// </summary>
        public bool IsPointerOverHud(Vector2 screen)
        {
            if (Root == null || Root.panel == null)
                return false;
            // Pixels of the render target (screen or texture), y flipped to the panel's top-left origin.
            Vector2 panelPoint = PixelToPanel(new Vector2(screen.x, TargetSize.y - screen.y));
            VisualElement picked = Root.panel.Pick(panelPoint);
            return picked != null && picked != Root && picked != _hud;
        }

        /// <summary>Panel coordinates (logical) of a point given in target pixels with origin top left (tests).</summary>
        public Vector2 PixelToPanel(Vector2 pixel)
        {
            return pixel / (Mathf.Min(TargetSize.x / Reference.x, TargetSize.y / Reference.y) * UiScale);
        }

        // ---------------------------------------------------------------- tooltips
        LuneTip WaveTip()
        {
            LuneHudModel.WaveInfo wave = Model.NextWave();
            return new LuneTip
            {
                Title = "Welle " + Match.RoundNumber, Glyph = "clock",
                Text = "Wellen sind unbegrenzt: Die Partie endet nur, wenn ein Ancient fällt. Monster werden jede Runde stärker, alle drei Runden kommt eines je Lane hinzu (bis 7).",
                Note = "Kommende Welle " + wave.Round + ": " + wave.Count + " Monster je Lane.",
            };
        }

        LuneTip AncientTip(AncientBlock block)
        {
            LuneHudModel.BuildingInfo ancient = block.Data;
            if (ancient == null)
                return null;
            int team = ancient.Team;
            int standing = (ancient.Base[0].Alive ? 1 : 0) + (ancient.Base[1].Alive ? 1 : 0);
            return new LuneTip
            {
                Title = "Ancient " + LuneUiTheme.TeamName(team) + " · " + LuneUiTheme.TeamEmblems[team], Glyph = "emblem_" + team, GlyphColor = LuneUiTheme.TeamColor(team),
                Text = "Fällt ein Ancient, ist die Partie vorbei. Er ist erst angreifbar, wenn beide Basistürme (Kernwacht) gefallen sind; die fallen erst, wenn eine Lane ganz offen ist.",
                Note = block.Own ? "B: Kamera zum eigenen Ancient" : "",
            }.Stat("heart", "Leben", LuneUiTheme.Number(ancient.Hp) + " / " + LuneUiTheme.Number(ancient.MaxHp)).Stat("tower", "Basistürme", standing + " von 2 stehen");
        }

        LuneTip BaseTip(AncientBlock block, int index)
        {
            LuneHudModel.BuildingInfo ancient = block.Data;
            if (ancient == null)
                return null;
            LuneHudModel.BuildingInfo baseTower = ancient.Base[index];
            return new LuneTip
            {
                Title = "Kernwacht " + (index + 1) + " · " + LuneUiTheme.TeamName(baseTower.Team), Glyph = "tower", GlyphColor = LuneUiTheme.TeamColor(baseTower.Team),
                Text = baseTower.Alive ? "Basisturm vor dem Ancient. Angreifbar, sobald auf einer Lane Grenzwacht und Bastion gefallen sind." : "Zerstört.",
            }.Stat("heart", "Leben", LuneLaneIndicator.TowerValue(baseTower));
        }

        LuneTip GoldTip()
        {
            return new LuneTip
            {
                Title = "Dein Gold", Glyph = "coin", GlyphColor = LuneUiTheme.Gold,
                Text = "Dazu kommt Gold für besiegte Monster, Champions, Gebäude und den Boss auf der eigenen Seite (Teile gehen ans Team).",
                Note = "Das Gold der anderen Spieler bleibt privat.",
            }.Stat("coin", "Jetzt", LuneUiTheme.Number(Model.OwnGold)).Stat("clock", "Einkommen", "+" + LuneUiTheme.Number(Model.Income) + " nach dieser Welle");
        }

        LuneTip StarterTip()
        {
            List<string> ids = Match.BaseIds(Model.Me.Bund);
            int cost = 0;
            var names = new List<string>();
            foreach (int index in new[] { 1, 0, 2 })
            {
                UnitDef data = DataCatalog.GetUnit(ids[index]);
                cost += data.Cost;
                names.Add(data.DisplayName);
            }
            return new LuneTip { Title = "Startaufstellung · " + cost + " Gold", Text = "Kauft " + string.Join(", ", names) + " für deine Lane." };
        }

        LuneTip ReadyTip()
        {
            if (Model.Locked)
                return new LuneTip { Title = "Bereit gemeldet", Text = "Deine Planung ist verbindlich. Der Kampf beginnt, sobald alle bereit sind." };
            return new LuneTip { Title = "Bereit", Text = "Übernimmt deine Planung verbindlich. Der Kampf läuft automatisch über alle drei Lanes.", Note = "Leertaste" };
        }
    }
}