using System;
using System.Collections.Generic;
using System.Globalization;
using System.Text.RegularExpressions;
using UnityEngine;
using UnityEngine.UI;

namespace TKS
{
    // ---------- 데이터(Resources/ChapterMap/Data/world.json · 원화 세션 chap_install.py 생성 · 좌표 = 맵 px · 왼쪽 위 원점 · y 아래로) ----------
    // 맵 그림·길 = world.json(맵 id 별) · 노드 자리 = Data/<맵>.json 의 stages[].at(기획 확정판 · 없으면 slots_N) · 게임 챕터·스테이지·노드 수 = BalanceConfig.chapters·stages(스테이지 표 CSV)

    [Serializable]
    public class WorldKitItem
    {
        public string name;
        public float[] pivot;        // 이미지 좌표(위 → 아래) 비율
        public float[] refSize;      // UI 기준 px
        public float[] numberCenter; // 번호 자리(이미지 좌표 비율)
    }

    [Serializable]
    public class WorldLandmark
    {
        public string ko;
        public float x;
        public float y;
        public string role;
    }

    [Serializable]
    public class WorldChapter
    {
        public string id;
        public int no;
        public string ko;
        public string years;
        public string map;
        public float[] roadX;
        public float[] roadY;
        public WorldLandmark[] landmarks;
        // world.json 의 nodes·stageLink(구 임시 연결 spec/stage_plan.json) 는 읽지 않는다 — 노드 = 스테이지 표(2026-11-05 145 스테이지)
    }

    [Serializable]
    public class WorldData
    {
        public float[] mapSize;
        public float[] viewSize;
        public float dotSpacing;
        public float[] flagStars;     // x0,y0,x1,y1,… (노드 기준 · y 아래로)
        public float[] flagBossStars;
        public float[] flagCursor;
        public float[] flagBossCursor;
        public float[] flagFrame;
        public bool showLabels;       // 장소 이름판 표시(그림 속 장소 위치와 맞춘 뒤 켬)
        public WorldKitItem[] kit;
        public WorldChapter[] chapters;

        public const string Path = "ChapterMap/Data/world";
        public const string DataRoot = "ChapterMap/Data/";

        public WorldChapter FindMap(string map)
        {
            if (chapters != null)
                foreach (var c in chapters)
                    if (c.map == map) return c;
            return null;
        }

        /// <summary>Data/&lt;map&gt;.json 의 stages(기획 확정판 맵 · 스테이지 번호·보스·지명·노드 좌표 at). 없으면 null.</summary>
        public static AnchorStage[] AnchorStages(string map)
        {
            var t = Resources.Load<TextAsset>(DataRoot + map);
            if (t == null) return null;
            try
            {
                var f = JsonUtility.FromJson<AnchorFile>(t.text);
                return f != null && f.stages != null && f.stages.Length > 0 ? f.stages : null;
            }
            catch (Exception e)
            {
                Debug.LogWarning("[TKS] " + DataRoot + map + " stages 읽기 실패: " + e.Message);
                return null;
            }
        }

        /// <summary>Data/&lt;map&gt;.json(원화 세션 anchors) 의 slots_n(맵 px · 첫 칸 = 출발). 없으면 null.</summary>
        public static Vector2[] AnchorSlots(string map, int n)
        {
            var t = Resources.Load<TextAsset>(DataRoot + map);
            if (t == null || n <= 0) return null;
            var m = Regex.Match(t.text, "\"slots_" + n + "\"\\s*:\\s*\\[((?:\\s*\\[[^\\]]*\\]\\s*,?)*)\\s*\\]");
            if (!m.Success) return null;
            var nums = Regex.Matches(m.Groups[1].Value, @"-?\d+(?:\.\d+)?(?:[eE][-+]?\d+)?");
            if (nums.Count != n * 2) return null;
            var res = new Vector2[n];
            for (int i = 0; i < n; i++)
                res[i] = new Vector2(float.Parse(nums[2 * i].Value, CultureInfo.InvariantCulture), float.Parse(nums[2 * i + 1].Value, CultureInfo.InvariantCulture));
            return res;
        }

        /// <summary>점 p 에 가장 가까운 길 위 지점의 호 길이.</summary>
        public static float ArcOf(WorldChapter c, float[] acc, Vector2 p)
        {
            int m = acc.Length;
            if (m == 1) return 0f;
            float best = float.MaxValue, res = 0f;
            for (int i = 1; i < m; i++)
            {
                var a = new Vector2(c.roadX[i - 1], c.roadY[i - 1]);
                var b = new Vector2(c.roadX[i], c.roadY[i]);
                var ab = b - a;
                float t = Mathf.Clamp01(Vector2.Dot(p - a, ab) / Mathf.Max(ab.sqrMagnitude, 1e-6f));
                float d = (a + ab * t - p).sqrMagnitude;
                if (d < best)
                {
                    best = d;
                    res = acc[i - 1] + (acc[i] - acc[i - 1]) * t;
                }
            }
            return res;
        }

        public static WorldData Load()
        {
            var t = Resources.Load<TextAsset>(Path);
            if (t == null) return null;
            try
            {
                return JsonUtility.FromJson<WorldData>(t.text);
            }
            catch (Exception e)
            {
                Debug.LogError("[TKS] world.json 읽기 실패: " + e.Message);
                return null;
            }
        }

        public WorldKitItem Kit(string name)
        {
            if (kit != null)
                foreach (var k in kit)
                    if (k.name == name) return k;
            return null;
        }

        /// <summary>길(road) 을 호 길이로 n 등분한 노드 자리(맵 px). 첫 칸 = 출발 · 마지막 = 보스.</summary>
        public static Vector2[] Slots(WorldChapter c, int n)
        {
            var acc = Arc(c);
            var res = new Vector2[Mathf.Max(0, n)];
            float total = acc[acc.Length - 1];
            for (int i = 0; i < res.Length; i++) res[i] = At(c, acc, n <= 1 ? 0f : total * i / (n - 1));
            return res;
        }

        public static float[] Arc(WorldChapter c)
        {
            int m = Mathf.Min(c.roadX.Length, c.roadY.Length);
            var acc = new float[Mathf.Max(1, m)];
            for (int i = 1; i < m; i++)
                acc[i] = acc[i - 1] + Vector2.Distance(new Vector2(c.roadX[i - 1], c.roadY[i - 1]), new Vector2(c.roadX[i], c.roadY[i]));
            return acc;
        }

        public static Vector2 At(WorldChapter c, float[] acc, float len)
        {
            int m = acc.Length;
            if (m == 1) return new Vector2(c.roadX[0], c.roadY[0]);
            for (int i = 1; i < m; i++)
            {
                if (acc[i] >= len)
                {
                    float t = (len - acc[i - 1]) / Mathf.Max(acc[i] - acc[i - 1], 1e-4f);
                    return Vector2.Lerp(new Vector2(c.roadX[i - 1], c.roadY[i - 1]), new Vector2(c.roadX[i], c.roadY[i]), t);
                }
            }
            return new Vector2(c.roadX[m - 1], c.roadY[m - 1]);
        }
    }

    /// <summary>Data/&lt;맵&gt;.json 의 stages 한 칸(챕터맵 보강 세션 기획 확정판 · 기획서 §4 번호·유형·지명 + 노드 좌표).</summary>
    [Serializable]
    public class AnchorStage
    {
        public int stage;
        public bool boss;
        public string place;
        public string title;
        public float[] at; // 맵 px(왼쪽 위 원점 · y 아래로)
    }

    [Serializable]
    public class AnchorFile
    {
        public AnchorStage[] stages;
    }

    public enum NodeState { Lock, Open, Clear }

    /// <summary>노드 자리 출처: 기획 확정판 stages[].at · 가안 slots_N · 길 위 균등(대체).</summary>
    public enum NodeSource { Stages, Slots, Road }

    /// <summary>임시 진행도(실행 중 메모리 · 저장 없음). 챕터별 깬 노드 수.</summary>
    public static class WorldProgress
    {
        static readonly Dictionary<int, int> cleared = new Dictionary<int, int>();

        public static int Cleared(int chapter)
        {
            int v;
            return cleared.TryGetValue(chapter, out v) ? v : 0;
        }

        public static void MarkCleared(int chapter, int node)
        {
            if (node + 1 > Cleared(chapter)) cleared[chapter] = node + 1;
        }

        public static void Reset()
        {
            cleared.Clear();
        }
    }

    /// <summary>
    /// 게임 시작 화면 = 챕터 월드맵(스크롤 · 상하좌우로 끌기). 길 위 깃발 노드를 누르면 스테이지 팝업 → 출전 = 전투 시작 ·
    /// 전투 결과를 탭하면 월드맵으로 돌아와 다음 노드가 열린다. 그림·길·부품 배치 = world.json · 노드 자리 = Data/&lt;맵&gt;.json stages[].at(없으면 slots_N → 길 위 균등) ·
    /// 챕터·노드·전투 = BalanceConfig.chapters·stages(스테이지 표 · C45) · 보스 노드 = type boss.
    /// </summary>
    public class WorldMapScreen : MonoBehaviour
    {
        public static WorldMapScreen Instance { get; private set; }

        const string UiRoot = "ChapterMap/UI/";
        const string MapRoot = "ChapterMap/Maps/";
        static readonly Color Ink = new Color(0.14f, 0.09f, 0.07f);
        static readonly Color Paper = new Color(1f, 0.98f, 0.93f);

        BattleManager battle;
        BattleHUD hud;
        SlingshotInput sling;
        WorldData data;
        BalanceConfig cfg;
        readonly List<int> nodeStages = new List<int>(); // 현재 챕터 노드 → stages 인덱스

        GameObject root;
        CanvasGroup group;
        ScrollRect scroll;
        RectTransform viewport;
        RectTransform content;
        Image mapImage;
        Text bannerText;
        Button prevButton;
        Button nextButton;
        RectTransform cursor;
        Vector2 cursorBase;
        readonly List<GameObject> spawned = new List<GameObject>();
        readonly List<Button> nodeButtons = new List<Button>();

        GameObject popup;
        Text popupTitle;
        Text popupBody;
        Button popupGo;
        Text popupGoLabel;
        int popupNode = -1;

        float inputBlockUntil;
        int chapter;
        int entryChapter = -1;
        int entryNode = -1;

        public bool HasData
        {
            get { return data != null && data.chapters != null && data.chapters.Length > 0 && cfg != null && cfg.chapters != null && cfg.chapters.Length > 0 && cfg.stages.Length > 0; }
        }
        public bool IsVisible { get { return root != null && root.activeSelf; } }
        public bool PopupVisible { get { return popup != null && popup.activeSelf; } }
        public int Chapter { get { return chapter; } }
        public int ChapterCount { get { return HasData ? cfg.chapters.Length : 0; } }
        public WorldData Data { get { return data; } }
        public Sprite MapSprite { get { return mapImage != null ? mapImage.sprite : null; } }
        public int NodeCount { get { return nodeButtons.Count; } }
        public int BossNodeCount { get; private set; }

        /// <summary>챕터(0부터)의 노드 수 = 스테이지 표의 그 챕터 스테이지 수.</summary>
        public int NodesIn(int ch)
        {
            return HasData && ch >= 0 && ch < cfg.chapters.Length ? cfg.StagesOfChapter(cfg.chapters[ch].no).Count : 0;
        }

        /// <summary>챕터(0부터) · 노드(0부터) → BalanceConfig.stages 인덱스(없으면 −1).</summary>
        public int StageIndexOf(int ch, int node)
        {
            if (!HasData || ch < 0 || ch >= cfg.chapters.Length) return -1;
            var list = cfg.StagesOfChapter(cfg.chapters[ch].no);
            return node >= 0 && node < list.Count ? list[node] : -1;
        }

        /// <summary>챕터(0부터)의 맵 길(world.json · chapters.csv map 열). 없으면 첫 맵.</summary>
        public WorldChapter MapOf(int ch)
        {
            if (!HasData) return null;
            var wc = ch >= 0 && ch < cfg.chapters.Length ? data.FindMap(cfg.chapters[ch].map) : null;
            return wc ?? data.chapters[0];
        }

        /// <summary>
        /// 노드 자리(맵 px) = Data/&lt;맵&gt;.json stages[].at(스테이지 번호로 맞춤 · 기획 확정판 맵) → 없거나 번호가 빠지면 slots_N → 그것도 없으면 길 위 균등.
        /// </summary>
        public Vector2[] NodeSlots(int ch, out NodeSource source)
        {
            var list = HasData && ch >= 0 && ch < cfg.chapters.Length ? cfg.StagesOfChapter(cfg.chapters[ch].no) : new List<int>();
            int n = list.Count;
            var wc = MapOf(ch);
            var plan = wc != null ? WorldData.AnchorStages(wc.map) : null;
            if (plan != null)
            {
                var res = new Vector2[n];
                int found = 0;
                for (int i = 0; i < n; i++)
                    foreach (var p in plan)
                        if (p.stage == cfg.stages[list[i]].stage && p.at != null && p.at.Length >= 2)
                        {
                            res[i] = new Vector2(p.at[0], p.at[1]);
                            found++;
                            break;
                        }
                if (found == n)
                {
                    source = NodeSource.Stages;
                    return res;
                }
                Debug.LogWarning("[TKS] " + wc.map + " stages[].at 이 스테이지 표와 안 맞음(" + found + "/" + n + ") → slots_N");
            }
            var s = wc != null ? WorldData.AnchorSlots(wc.map, n) : null;
            source = s != null ? NodeSource.Slots : NodeSource.Road;
            return s ?? (wc != null ? WorldData.Slots(wc, n) : new Vector2[0]);
        }

        void Awake()
        {
            Instance = this;
        }

        void OnDestroy()
        {
            if (Instance == this) Instance = null;
        }

        public void Build(BattleManager b, BattleHUD h, SlingshotInput s, Camera cam)
        {
            battle = b;
            hud = h;
            sling = s;
            data = WorldData.Load();
            cfg = b != null ? b.Config : null;
            if (!HasData)
            {
                Debug.LogWarning("[TKS] 월드맵 데이터 없음(" + WorldData.Path + " 또는 BalanceConfig.chapters — TKS/Import Stages) → 바로 전투");
                return;
            }
            battle.ResultHandler = OnBattleResult;

            root = new GameObject("WorldMapCanvas");
            root.transform.SetParent(transform, false);
            var canvas = root.AddComponent<Canvas>();
            canvas.renderMode = RenderMode.ScreenSpaceCamera; // 카메라 캡처(자동 플레이)에도 찍히게
            canvas.worldCamera = cam;
            canvas.planeDistance = 0.5f;
            canvas.sortingOrder = 300;
            var scaler = root.AddComponent<CanvasScaler>();
            scaler.uiScaleMode = CanvasScaler.ScaleMode.ScaleWithScreenSize;
            scaler.referenceResolution = new Vector2(data.viewSize[0], data.viewSize[1]);
            scaler.matchWidthOrHeight = 0.5f;
            root.AddComponent<GraphicRaycaster>();
            group = root.AddComponent<CanvasGroup>();

            // 스크롤(맵 = 콘텐츠 · 왼쪽 위 기준)
            viewport = Rect("Viewport", root.transform, Vector2.zero, Vector2.one, new Vector2(0.5f, 0.5f), Vector2.zero, Vector2.zero);
            var vpImg = viewport.gameObject.AddComponent<Image>();
            vpImg.color = new Color(0.1f, 0.12f, 0.1f);
            viewport.gameObject.AddComponent<RectMask2D>();
            content = Rect("Content", viewport, new Vector2(0f, 1f), new Vector2(0f, 1f), new Vector2(0f, 1f), Vector2.zero, new Vector2(data.mapSize[0], data.mapSize[1]));
            mapImage = content.gameObject.AddComponent<Image>();
            mapImage.raycastTarget = true; // 맵 아무 데나 끌기
            scroll = viewport.gameObject.AddComponent<ScrollRect>();
            scroll.viewport = viewport;
            scroll.content = content;
            scroll.horizontal = true;
            scroll.vertical = true;
            scroll.movementType = ScrollRect.MovementType.Clamped;
            scroll.inertia = true;
            scroll.decelerationRate = 0.12f;
            scroll.scrollSensitivity = 60f;

            // 위 챕터 띠 + 챕터 넘김
            var banner = Img("Banner", root.transform, Sprite("banner"), new Vector2(0.5f, 1f), new Vector2(0.5f, 1f), new Vector2(0.5f, 1f), new Vector2(0f, -40f), new Vector2(640f, 112f));
            banner.type = Image.Type.Sliced;
            var bk = data.Kit("banner");
            float tcy = bk != null && bk.numberCenter != null ? bk.numberCenter[1] : 0.4f;
            bannerText = Label(banner.transform, "", 40, Paper, new Vector2(0.5f, 1f - tcy));
            prevButton = SmallButton("Prev", root.transform, "◀", new Vector2(0f, 1f), new Vector2(70f, -96f), () => ShowChapter(chapter - 1));
            nextButton = SmallButton("Next", root.transform, "▶", new Vector2(1f, 1f), new Vector2(-70f, -96f), () => ShowChapter(chapter + 1));

            var hint = Label(root.transform, "맵을 끌어 둘러보고 깃발을 눌러 출전", 30, Paper, new Vector2(0.5f, 0f));
            var hrt = hint.rectTransform;
            hrt.anchorMin = hrt.anchorMax = new Vector2(0.5f, 0f);
            hrt.anchoredPosition = new Vector2(0f, 90f);

            BuildPopup();
            root.SetActive(false);
        }

        // ---------- 화면 전환 ----------

        /// <summary>월드맵을 연다(전투 정리 · 전투 HUD·조작 끔).</summary>
        public void Show(int ch)
        {
            if (!HasData) return;
            if (battle != null && battle.Phase != BattlePhase.Setup) battle.GoIdle();
            if (hud != null) hud.gameObject.SetActive(false);
            if (sling != null) sling.enabled = false;
            root.SetActive(true);
            inputBlockUntil = Time.unscaledTime + 0.25f; // 결과 화면 탭이 노드 클릭으로 이어지지 않게
            ShowChapter(ch);
        }

        public void ShowChapter(int ch)
        {
            if (!HasData) return;
            chapter = Mathf.Clamp(ch, 0, cfg.chapters.Length - 1);
            ClosePopup();
            var def = cfg.chapters[chapter];
            var c = MapOf(chapter);
            foreach (var go in spawned)
                if (go != null) Destroy(go);
            spawned.Clear();
            nodeButtons.Clear();
            cursor = null;
            nodeStages.Clear();
            nodeStages.AddRange(cfg.StagesOfChapter(def.no));
            BossNodeCount = 0;

            if (c.map != def.map) Debug.LogWarning("[TKS] 챕터 " + def.no + " 맵 「" + def.map + "」 이 world.json 에 없음 → " + c.map);
            var sp = Resources.Load<Sprite>(MapRoot + c.map);
            if (sp == null) Debug.LogWarning("[TKS] 맵 그림 없음: " + MapRoot + c.map);
            mapImage.sprite = sp;
            mapImage.color = sp != null ? Color.white : new Color(0.55f, 0.7f, 0.45f);
            bannerText.text = "제" + def.no + "장  " + def.title;
            prevButton.interactable = chapter > 0;
            nextButton.interactable = chapter < cfg.chapters.Length - 1;

            NodeSource source;
            var slots = NodeSlots(chapter, out source);
            var acc = WorldData.Arc(c);
            var len = new float[slots.Length];
            for (int i = 0; i < slots.Length; i++) len[i] = WorldData.ArcOf(c, acc, slots[i]);
            int cleared = ChapterUnlocked(chapter) ? WorldProgress.Cleared(chapter) : 0;

            // 길 점(노드 사이 · 노드 자리를 길에 투영한 호 길이 구간)
            float spacing = Mathf.Max(8f, data.dotSpacing);
            for (int i = 0; i + 1 < slots.Length; i++)
            {
                float l0 = Mathf.Min(len[i], len[i + 1]) + 44f;
                float l1 = Mathf.Max(len[i], len[i + 1]) - 44f;
                if (l1 <= l0) continue;
                int m = Mathf.Max(0, Mathf.FloorToInt((l1 - l0) / spacing));
                for (int j = 0; j <= m; j++)
                {
                    var p = WorldData.At(c, acc, Mathf.Lerp(l0, l1, m == 0 ? 0.5f : (float)j / m));
                    Piece(i < cleared ? "dot_on" : "dot_off", p, false);
                }
            }
            // 장소 이름판
            if (data.showLabels && c.landmarks != null)
                foreach (var L in c.landmarks)
                {
                    if (string.IsNullOrEmpty(L.ko)) continue;
                    var plate = Piece("plate", new Vector2(L.x, L.y), false);
                    if (plate == null) continue;
                    plate.type = Image.Type.Sliced;
                    var t = Label(plate.transform, L.ko, 26, new Color(0.28f, 0.17f, 0.11f), new Vector2(0.5f, 0.5f));
                    t.GetComponent<Outline>().enabled = false;
                    plate.rectTransform.sizeDelta = new Vector2(t.preferredWidth + 60f, plate.rectTransform.sizeDelta.y);
                }
            // 노드
            for (int i = 0; i < slots.Length; i++)
            {
                var stage = cfg.stages[nodeStages[i]];
                bool boss = stage.kind == StageKind.Boss;
                if (boss) BossNodeCount++;
                var st = StateOf(chapter, i);
                string key = (boss ? "flag_boss_" : "flag_") + (st == NodeState.Clear ? "clear" : st == NodeState.Open ? "open" : "lock");
                if (boss) Piece("frame", slots[i] + V(data.flagFrame), false);
                var img = Piece(key, slots[i], true);
                if (img == null) continue;
                int node = i;
                var btn = img.gameObject.AddComponent<Button>();
                btn.transition = Selectable.Transition.ColorTint;
                btn.onClick.AddListener(() => OnNodeClicked(node));
                nodeButtons.Add(btn);
                var kit = data.Kit(key);
                if (st != NodeState.Lock && kit != null)
                {
                    var t = Label(img.transform, def.no + "-" + stage.stage, boss ? 38 : (def.no >= 10 || stage.stage >= 10 ? 26 : 32), Paper, new Vector2(kit.numberCenter[0], 1f - kit.numberCenter[1]));
                    t.raycastTarget = false;
                }
                if (st == NodeState.Clear)
                {
                    var so = boss ? data.flagBossStars : data.flagStars;
                    for (int k = 0; k + 1 < so.Length; k += 2) Piece("star_on", slots[i] + new Vector2(so[k], so[k + 1]), false);
                }
                if (st == NodeState.Open)
                {
                    var co = boss ? data.flagBossCursor : data.flagCursor;
                    var cimg = Piece("cursor", slots[i] + V(co), false);
                    if (cimg != null)
                    {
                        cursor = cimg.rectTransform;
                        cursorBase = cursor.anchoredPosition;
                    }
                }
            }
            // 처음 위치 = 도전할 노드(없으면 출발)
            int focus = Mathf.Clamp(Mathf.Min(cleared, slots.Length - 1), 0, Mathf.Max(0, slots.Length - 1));
            if (slots.Length > 0) ScrollTo(slots[focus]);
        }

        /// <summary>맵 px 지점을 화면 가운데로(맵 끝에서 멈춤).</summary>
        public void ScrollTo(Vector2 p)
        {
            Canvas.ForceUpdateCanvases();
            var vr = viewport.rect;
            float w = data.mapSize[0], h = data.mapSize[1];
            float nx = w > vr.width ? Mathf.Clamp01((p.x - vr.width / 2f) / (w - vr.width)) : 0f;
            float ny = h > vr.height ? Mathf.Clamp01((p.y - vr.height / 2f) / (h - vr.height)) : 0f;
            scroll.StopMovement();
            scroll.normalizedPosition = new Vector2(nx, 1f - ny);
        }

        public NodeState StateOf(int ch, int node)
        {
            if (!HasData || !ChapterUnlocked(ch)) return NodeState.Lock;
            int cleared = WorldProgress.Cleared(ch);
            if (node < cleared) return NodeState.Clear;
            return node == cleared ? NodeState.Open : NodeState.Lock;
        }

        public bool ChapterUnlocked(int ch)
        {
            if (!HasData || ch < 0 || ch >= cfg.chapters.Length) return false;
            return ch == 0 || WorldProgress.Cleared(ch - 1) >= NodesIn(ch - 1);
        }

        // ---------- 팝업 ----------

        void OnNodeClicked(int node)
        {
            if (Time.unscaledTime < inputBlockUntil) return;
            OpenPopup(node);
        }

        public void OpenPopup(int node)
        {
            if (!HasData) return;
            int si = StageIndexOf(chapter, node);
            if (si < 0) return;
            popupNode = node;
            var st = StateOf(chapter, node);
            var def = cfg.chapters[chapter];
            var stage = cfg.stages[si];
            string tag = stage.kind == StageKind.Boss ? "  보스" : stage.kind == StageKind.Elite ? "  엘리트" : "";
            popupTitle.text = def.no + "-" + stage.stage + tag + "\n제" + def.no + "장 " + def.title;
            var body = new System.Text.StringBuilder();
            body.Append(stage.title);
            if (!string.IsNullOrEmpty(stage.place)) body.Append("\n<size=26>").Append(stage.place).Append(string.IsNullOrEmpty(stage.bgTheme) ? "" : " · " + stage.bgTheme).Append("</size>");
            body.Append("\n\n").Append(EnemySummary(stage));
            if (st == NodeState.Lock) body.Append("\n\n잠긴 스테이지 — 앞 스테이지를 먼저 깨세요");
            popupBody.text = body.ToString();
            popupGo.interactable = st != NodeState.Lock;
            popupGoLabel.text = st == NodeState.Clear ? "다시 출전" : "출전";
            popup.SetActive(true);
        }

        public void ClosePopup()
        {
            popupNode = -1;
            if (popup != null) popup.SetActive(false);
        }

        public void ConfirmPopup()
        {
            if (popupNode < 0) return;
            if (StateOf(chapter, popupNode) == NodeState.Lock) return;
            EnterStage(chapter, popupNode);
        }

        /// <summary>노드의 전투로 들어간다(월드맵 닫음 · HUD·조작 켬).</summary>
        public void EnterStage(int ch, int node)
        {
            if (!HasData)
            {
                battle.StartStage(0);
                return;
            }
            chapter = Mathf.Clamp(ch, 0, cfg.chapters.Length - 1);
            int si = StageIndexOf(chapter, node);
            if (si < 0) return;
            entryChapter = chapter;
            entryNode = node;
            ClosePopup();
            root.SetActive(false);
            if (hud != null) hud.gameObject.SetActive(true);
            if (sling != null) sling.enabled = true;
            battle.StartStage(si);
        }

        void OnBattleResult(bool win)
        {
            int ch = entryChapter >= 0 ? entryChapter : chapter;
            if (win && entryNode >= 0)
            {
                WorldProgress.MarkCleared(ch, entryNode);
                // 챕터 마지막 스테이지를 깨면 다음 챕터 맵으로
                if (entryNode == NodesIn(ch) - 1 && ch + 1 < cfg.chapters.Length) ch++;
            }
            entryChapter = entryNode = -1;
            Show(ch);
        }

        /// <summary>적 수·병종 + 장수(보스 · 엘리트) 이름.</summary>
        static string EnemySummary(BalanceConfig.StageDef stage)
        {
            var counts = new int[UnitTypeInfo.Count];
            var bosses = new List<string>();
            var elites = new List<string>();
            foreach (var e in stage.enemies)
            {
                counts[(int)e.type]++;
                if (e.isBoss) bosses.Add(e.name);
                else if (e.isGeneral) elites.Add(e.name);
            }
            var sb = new System.Text.StringBuilder("적 " + stage.enemies.Count + "기  ·  ");
            bool first = true;
            for (int t = 0; t < counts.Length; t++)
            {
                if (counts[t] == 0) continue;
                if (!first) sb.Append(" ");
                sb.Append(UnitTypeInfo.Korean((UnitType)t)).Append(" ").Append(counts[t]);
                first = false;
            }
            if (bosses.Count > 0) sb.Append("\n보스  ").Append(string.Join(" · ", bosses.ToArray()));
            if (elites.Count > 0) sb.Append("\n장수  ").Append(string.Join(" · ", elites.ToArray()));
            return sb.ToString();
        }

        void BuildPopup()
        {
            var dim = Img("Popup", root.transform, null, Vector2.zero, Vector2.one, new Vector2(0.5f, 0.5f), Vector2.zero, Vector2.zero);
            dim.color = new Color(0f, 0f, 0f, 0.6f);
            dim.raycastTarget = true;
            popup = dim.gameObject;
            var panel = Img("Panel", popup.transform, Sprite("plate"), new Vector2(0.5f, 0.5f), new Vector2(0.5f, 0.5f), new Vector2(0.5f, 0.5f), new Vector2(0f, 40f), new Vector2(880f, 760f));
            panel.type = Image.Type.Sliced;
            panel.raycastTarget = true;
            var head = Img("Head", panel.transform, Sprite("banner"), new Vector2(0.5f, 1f), new Vector2(0.5f, 1f), new Vector2(0.5f, 0.5f), new Vector2(0f, 0f), new Vector2(760f, 112f));
            head.type = Image.Type.Sliced;
            var bk = data.Kit("banner");
            popupTitle = Label(head.transform, "", 34, Paper, new Vector2(0.5f, 1f - (bk != null ? bk.numberCenter[1] : 0.4f)));
            popupTitle.lineSpacing = 0.9f;
            popupBody = Label(panel.transform, "", 34, new Color(0.25f, 0.15f, 0.1f), new Vector2(0.5f, 0.55f));
            popupBody.GetComponent<Outline>().enabled = false;
            popupBody.rectTransform.sizeDelta = new Vector2(780f, 420f);
            popupBody.horizontalOverflow = HorizontalWrapMode.Wrap;
            popupBody.supportRichText = true;
            popupGo = WideButton("Go", panel.transform, "출전", new Vector2(-180f, 80f), new Color(0.89f, 0.33f, 0.23f), ConfirmPopup, out popupGoLabel);
            Text closeLabel;
            WideButton("Close", panel.transform, "닫기", new Vector2(180f, 80f), new Color(0.6f, 0.55f, 0.5f), ClosePopup, out closeLabel);
            popup.SetActive(false);
        }

        // ---------- 그리기 도우미 ----------

        void Update()
        {
            if (cursor != null) cursor.anchoredPosition = cursorBase + new Vector2(0f, 10f * Mathf.Abs(Mathf.Sin(Time.unscaledTime * 4f)));
            if (group != null) group.interactable = Time.unscaledTime >= inputBlockUntil;
        }

        static Vector2 V(float[] a)
        {
            return a != null && a.Length >= 2 ? new Vector2(a[0], a[1]) : Vector2.zero;
        }

        static Sprite Sprite(string name)
        {
            return Resources.Load<Sprite>(UiRoot + name);
        }

        /// <summary>맵 px 위치(y 아래로)에 부품 1개. 크기 = kit refSize · 피벗 = kit pivot.</summary>
        Image Piece(string name, Vector2 mapPos, bool raycast)
        {
            var sp = Sprite(name);
            var kit = data.Kit(name);
            if (sp == null || kit == null) return null;
            var go = new GameObject(name);
            go.transform.SetParent(content, false);
            var rt = go.AddComponent<RectTransform>();
            rt.anchorMin = rt.anchorMax = new Vector2(0f, 1f);
            rt.pivot = new Vector2(kit.pivot[0], 1f - kit.pivot[1]);
            rt.sizeDelta = new Vector2(kit.refSize[0], kit.refSize[1]);
            rt.anchoredPosition = new Vector2(mapPos.x, -mapPos.y);
            var img = go.AddComponent<Image>();
            img.sprite = sp;
            img.raycastTarget = raycast;
            spawned.Add(go);
            return img;
        }

        static RectTransform Rect(string name, Transform parent, Vector2 aMin, Vector2 aMax, Vector2 pivot, Vector2 pos, Vector2 size)
        {
            var go = new GameObject(name);
            go.transform.SetParent(parent, false);
            var rt = go.AddComponent<RectTransform>();
            rt.anchorMin = aMin;
            rt.anchorMax = aMax;
            rt.pivot = pivot;
            rt.anchoredPosition = pos;
            rt.sizeDelta = size;
            return rt;
        }

        static Image Img(string name, Transform parent, Sprite sp, Vector2 aMin, Vector2 aMax, Vector2 pivot, Vector2 pos, Vector2 size)
        {
            var rt = Rect(name, parent, aMin, aMax, pivot, pos, size);
            var img = rt.gameObject.AddComponent<Image>();
            img.sprite = sp;
            img.raycastTarget = false;
            return img;
        }

        /// <summary>부모 안 anchor 지점(비율 · 아래 원점)에 가운데 맞춤 글자(흰 글자 + 검정 테).</summary>
        static Text Label(Transform parent, string text, int size, Color color, Vector2 anchor)
        {
            var rt = Rect("Text", parent, anchor, anchor, new Vector2(0.5f, 0.5f), Vector2.zero, new Vector2(600f, size * 2.6f));
            var t = rt.gameObject.AddComponent<Text>();
            t.font = TextUtil.Font;
            t.fontSize = size;
            t.fontStyle = FontStyle.Bold;
            t.alignment = TextAnchor.MiddleCenter;
            t.color = color;
            t.horizontalOverflow = HorizontalWrapMode.Overflow;
            t.verticalOverflow = VerticalWrapMode.Overflow;
            t.raycastTarget = false;
            t.text = text;
            var o = rt.gameObject.AddComponent<Outline>();
            o.effectColor = Ink;
            o.effectDistance = new Vector2(3f, -3f);
            return t;
        }

        Button SmallButton(string name, Transform parent, string label, Vector2 anchor, Vector2 pos, Action onClick)
        {
            var img = Img(name, parent, Sprite("plate"), anchor, anchor, new Vector2(0.5f, 0.5f), pos, new Vector2(110f, 80f));
            img.type = Image.Type.Sliced;
            img.raycastTarget = true;
            var b = img.gameObject.AddComponent<Button>();
            b.onClick.AddListener(() => onClick());
            var t = Label(img.transform, label, 40, new Color(0.45f, 0.22f, 0.12f), new Vector2(0.5f, 0.55f));
            t.GetComponent<Outline>().enabled = false;
            return b;
        }

        Button WideButton(string name, Transform parent, string label, Vector2 pos, Color tint, Action onClick, out Text labelText)
        {
            var img = Img(name, parent, Sprite("plate"), new Vector2(0.5f, 0f), new Vector2(0.5f, 0f), new Vector2(0.5f, 0.5f), pos, new Vector2(300f, 100f));
            img.type = Image.Type.Sliced;
            img.color = tint;
            img.raycastTarget = true;
            var b = img.gameObject.AddComponent<Button>();
            b.onClick.AddListener(() => onClick());
            labelText = Label(img.transform, label, 42, Paper, new Vector2(0.5f, 0.55f));
            return b;
        }
    }
}