using System.IO;
using UnityEditor;
using UnityEngine;
using BaseGames.Combat;
using BaseGames.Player;

namespace BaseGames.Editor.Combat
{
    /// <summary>
    /// 向导：一键生成武器 HitBox Prefab（W-10）。
    /// 菜单：BaseGames / Create / Weapon HitBox Prefab
    ///
    /// 生成路径规范：Assets/_Game/Prefabs/Weapons/WPN_{weaponId}_HitBox.prefab
    /// Prefab 结构：
    ///   [WPN_{weaponId}_HitBox]   ← WeaponHitBoxInstance
    ///   ├── [HitBox_Ground]       ← Collider2D(IsTrigger, 形状可选) + HitBox, Layer=PlayerHitBox
    ///   ├── [HitBox_Up]
    ///   ├── [HitBox_Down]
    ///   └── [HitBox_Air]
    /// </summary>
    public class WeaponHitBoxWizard : ScriptableWizard
    {
        private const string OutputFolder = "Assets/_Game/Prefabs/Weapons";

        /// <summary>每个方向可选的 Collider 形状。</summary>
        public enum ColliderShape
        {
            [Tooltip("BoxCollider2D — 矩形，适合水平/垂直扫击")]
            Box,
            [Tooltip("CapsuleCollider2D — 胶囊体，适合刺击或弧形")]
            Capsule,
            [Tooltip("PolygonCollider2D（菱形默认点）— 适合不规则斩击")]
            Polygon,
        }

        [MenuItem("BaseGames/Create/Weapon HitBox Prefab", priority = 200)]
        public static void Open() =>
            DisplayWizard<WeaponHitBoxWizard>("Weapon HitBox Prefab 向导", "创建");

        [Tooltip("武器唯一 ID，如 SkyBlade。Prefab 将命名为 WPN_{weaponId}_HitBox")]
        public string weaponId = "";

        [Header("包含哪些攻击方向")]
        public bool includeGround = true;
        public bool includeUp     = true;
        public bool includeDown   = true;
        public bool includeAir    = true;

        [Header("每个方向的 Collider 形状")]
        [Tooltip("Ground / 落地攻击的碰撞体形状")]
        public ColliderShape groundShape = ColliderShape.Box;
        [Tooltip("Up / 上挑攻击的碰撞体形状")]
        public ColliderShape upShape     = ColliderShape.Capsule;
        [Tooltip("Down / 下砸攻击的碰撞体形状")]
        public ColliderShape downShape   = ColliderShape.Box;
        [Tooltip("Air / 空中攻击的碰撞体形状")]
        public ColliderShape airShape    = ColliderShape.Capsule;

        // ── 向导回调 ──────────────────────────────────────────────────────────

        private void OnWizardUpdate()
        {
            isValid = !string.IsNullOrWhiteSpace(weaponId);
            helpString = isValid
                ? $"将创建：{OutputFolder}/WPN_{weaponId}_HitBox.prefab"
                : "请输入 weaponId（武器唯一 ID，如 SkyBlade）。";
        }

        private void OnWizardCreate()
        {
            if (string.IsNullOrWhiteSpace(weaponId))
            {
                EditorUtility.DisplayDialog("错误", "weaponId 不能为空。", "确认");
                return;
            }

            string prefabName = $"WPN_{weaponId}_HitBox";
            string assetPath  = $"{OutputFolder}/{prefabName}.prefab";

            string fullPath = Path.Combine(
                Path.GetDirectoryName(Application.dataPath)!,
                assetPath.Replace('/', Path.DirectorySeparatorChar));

            if (File.Exists(fullPath))
            {
                if (!EditorUtility.DisplayDialog("已存在",
                        $"{assetPath}\n\n该 Prefab 已存在，是否覆盖？",
                        "覆盖", "取消"))
                    return;
            }

            EditorScaffoldUtils.EnsureFolder(OutputFolder);

            int hitBoxLayer = LayerMask.NameToLayer("PlayerHitBox");
            if (hitBoxLayer < 0)
            {
                Debug.LogWarning("[WeaponHitBoxWizard] 未找到 Physics Layer 'PlayerHitBox'，子节点 Layer 将设为 Default。");
                hitBoxLayer = 0;
            }

            // ── 构建 Prefab ────────────────────────────────────────────────
            var root     = new GameObject(prefabName);
            var instance = root.AddComponent<WeaponHitBoxInstance>();
            var so       = new SerializedObject(instance);

            void AddDirection(bool enabled, string nodeName, string fieldName, ColliderShape shape)
            {
                if (!enabled) return;

                var child = new GameObject(nodeName);
                child.transform.SetParent(root.transform, false);
                child.layer = hitBoxLayer;

                AddCollider(child, shape);

                var hb   = child.AddComponent<HitBox>();
                var prop = so.FindProperty(fieldName);
                if (prop != null)
                    prop.objectReferenceValue = hb;
            }

            AddDirection(includeGround, "HitBox_Ground", "_hitBoxGround", groundShape);
            AddDirection(includeUp,     "HitBox_Up",     "_hitBoxUp",     upShape);
            AddDirection(includeDown,   "HitBox_Down",   "_hitBoxDown",   downShape);
            AddDirection(includeAir,    "HitBox_Air",    "_hitBoxAir",    airShape);

            so.ApplyModifiedPropertiesWithoutUndo();

            var prefab = PrefabUtility.SaveAsPrefabAsset(root, assetPath);
            Object.DestroyImmediate(root);
            AssetDatabase.Refresh();

            if (prefab != null)
            {
                EditorScaffoldUtils.PingAndSelect(prefab);
                Debug.Log($"[WeaponHitBoxWizard] 已创建：{assetPath}");
            }
            else
            {
                Debug.LogError($"[WeaponHitBoxWizard] Prefab 保存失败：{assetPath}");
            }
        }

        // ── 辅助：按形状添加 2D 碰撞体 ────────────────────────────────────────

        private static void AddCollider(GameObject go, ColliderShape shape)
        {
            switch (shape)
            {
                case ColliderShape.Box:
                {
                    var c = go.AddComponent<BoxCollider2D>();
                    c.isTrigger = true;
                    c.size      = new Vector2(1f, 0.5f);
                    break;
                }
                case ColliderShape.Capsule:
                {
                    var c = go.AddComponent<CapsuleCollider2D>();
                    c.isTrigger = true;
                    c.size      = new Vector2(0.5f, 1f);
                    break;
                }
                case ColliderShape.Polygon:
                {
                    var c = go.AddComponent<PolygonCollider2D>();
                    c.isTrigger = true;
                    // 默认菱形点（0.5 × 0.5 单位）
                    c.SetPath(0, new Vector2[]
                    {
                        new( 0f,    0.3f),
                        new( 0.5f,  0f  ),
                        new( 0f,   -0.3f),
                        new(-0.5f,  0f  ),
                    });
                    break;
                }
            }
        }
    }
}