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

namespace BaseGames.Editor.Skills
{
    /// <summary>
    /// 向导：一键生成技能 HitBox Prefab（W-11）。
    /// 菜单：BaseGames / Create / Skill HitBox Prefab
    ///
    /// 生成路径规范：Assets/_Game/Prefabs/Skills/SKL_{skillId}_HitBox.prefab
    /// Prefab 结构（以 hitBoxCount=1 为例）：
    ///   [SKL_{skillId}_HitBox]   ← SkillHitBoxInstance (_hitBoxes 自动赋值)
    ///   └── [HitBox_0]           ← PolygonCollider2D(IsTrigger) + HitBox, Layer=PlayerHitBox
    /// </summary>
    public class SkillHitBoxWizard : ScriptableWizard
    {
        private const string OutputFolder = "Assets/_Game/Prefabs/Skills";

        [MenuItem("BaseGames/Create/Skill HitBox Prefab", priority = 201)]
        public static void Open() =>
            DisplayWizard<SkillHitBoxWizard>("Skill HitBox Prefab 向导", "创建");

        [Tooltip("技能唯一 ID，如 SkySlash。Prefab 将命名为 SKL_{skillId}_HitBox")]
        public string skillId = "";

        [Tooltip("多段伤害时可设置 >1（每段一个 HitBox 子节点）")]
        [Range(1, 4)]
        public int hitBoxCount = 1;

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

        private void OnWizardUpdate()
        {
            isValid = !string.IsNullOrWhiteSpace(skillId);
            helpString = isValid
                ? $"将创建：{OutputFolder}/SKL_{skillId}_HitBox.prefab（{hitBoxCount} 个 HitBox）"
                : "请输入 skillId（技能唯一 ID，如 SkySlash）。";
        }

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

            string prefabName = $"SKL_{skillId}_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("[SkillHitBoxWizard] 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<SkillHitBoxInstance>();
            var so       = new SerializedObject(instance);

            var hbRefs = new HitBox[hitBoxCount];
            for (int i = 0; i < hitBoxCount; i++)
            {
                var child = new GameObject($"HitBox_{i}");
                child.transform.SetParent(root.transform, false);
                child.layer = hitBoxLayer;

                // PolygonCollider2D 默认菱形（1×0.5），策划在 Scene 中调整具体形状
                var poly = child.AddComponent<PolygonCollider2D>();
                poly.isTrigger = true;
                poly.SetPath(0, new Vector2[]
                {
                    new(-0.5f, -0.25f), new(0.5f, -0.25f),
                    new(0.5f,   0.25f), new(-0.5f,  0.25f),
                });

                hbRefs[i] = child.AddComponent<HitBox>();
            }

            // 将 HitBox[] 赋值给 _hitBoxes
            var arrayProp = so.FindProperty("_hitBoxes");
            if (arrayProp != null && arrayProp.isArray)
            {
                arrayProp.arraySize = hitBoxCount;
                for (int i = 0; i < hitBoxCount; i++)
                    arrayProp.GetArrayElementAtIndex(i).objectReferenceValue = hbRefs[i];
                so.ApplyModifiedPropertiesWithoutUndo();
            }
            else
            {
                Debug.LogWarning("[SkillHitBoxWizard] 未找到 SkillHitBoxInstance._hitBoxes 字段，请手动赋值。");
            }

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

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