// WL838_BowRelease.cs — 활 클립(.anim 또는 FBX)에서 「시위를 놓는 순간」을 수치로 찾는다 (에디트 모드 · 프리뷰 씬)
//   run_script --file AgentScripts/WL838_BowRelease.cs --entry WL838_BowRelease.Run --args '["Assets/WL/Combat/Anim/FR/FR_Bow0.anim", ""]'
//   프레임(30 fps)마다 양손 거리(당김) · 오른손 속도 · 왼손(활팔) 앞 뻗음을 찍는다. 당김이 최대인 뒤 양손 거리가 급감하는 프레임 = 발사(Projectile) 후보.
using System.Linq;
using System.Text;
using UnityEditor;
using UnityEditor.SceneManagement;
using UnityEngine;

public static class WL838_BowRelease
{
    public static string Run(string src, string clipName)
    {
        string pcName = WL.Character.WLCharacterSwapSettings.Resolve("Ai01");
        var model = AssetDatabase.LoadAssetAtPath<GameObject>("Assets/Res_Addr/PC/" + pcName + ".prefab");
        if (model == null) return "PC 프리팹 없음";
        AnimationClip clip;
        if (src.EndsWith(".anim")) clip = AssetDatabase.LoadAssetAtPath<AnimationClip>(src);
        else
        {
            var clips = AssetDatabase.LoadAllAssetsAtPath(src).OfType<AnimationClip>().Where(c => !c.name.StartsWith("__preview")).ToArray();
            clip = string.IsNullOrEmpty(clipName) ? clips.FirstOrDefault() : (clips.FirstOrDefault(c => c.name == clipName) ?? clips.FirstOrDefault(c => c.name.Contains(clipName)));
        }
        if (clip == null) return "클립 없음 " + src;
        var scene = EditorSceneManager.NewPreviewScene();
        bool animMode = false;
        try
        {
            var go = (GameObject)PrefabUtility.InstantiatePrefab(model, scene);
            go.transform.position = Vector3.zero; go.transform.rotation = Quaternion.identity;
            var anim = go.GetComponentInChildren<Animator>();
            if (anim == null) return "Animator 없음";
            AnimationMode.StartAnimationMode(); animMode = true;
            var sb = new StringBuilder();
            sb.Append("clip=").Append(clip.name).Append(" len=").Append(clip.length.ToString("0.000")).Append("s human=").Append(clip.isHumanMotion).Append('\n');
            sb.Append("f   t     norm  handDist  rHandSpd  lHandFwd  rHandFwd  rHandUp\n");
            int frames = Mathf.Max(2, Mathf.RoundToInt(clip.length * 30f));
            Vector3 prevR = Vector3.zero; float maxDist = 0f; int maxF = -1;
            var rows = new System.Collections.Generic.List<string>();
            var dists = new float[frames + 1];
            for (int f = 0; f <= frames; f++)
            {
                float t = Mathf.Min(f / 30f, clip.length);
                AnimationMode.BeginSampling(); AnimationMode.SampleAnimationClip(anim.gameObject, clip, t); AnimationMode.EndSampling();
                var lh = anim.GetBoneTransform(HumanBodyBones.LeftHand); var rh = anim.GetBoneTransform(HumanBodyBones.RightHand); var hips = anim.GetBoneTransform(HumanBodyBones.Hips);
                if (lh == null || rh == null || hips == null) return "손/힙 본 없음";
                Vector3 fwd = go.transform.forward, up = Vector3.up;
                float d = Vector3.Distance(lh.position, rh.position);
                dists[f] = d;
                float spd = f == 0 ? 0f : Vector3.Distance(rh.position, prevR) * 30f;
                prevR = rh.position;
                if (d > maxDist) { maxDist = d; maxF = f; }
                rows.Add(string.Format("{0,-3} {1,5:0.000} {2,5:0.00} {3,8:0.000} {4,9:0.00} {5,9:0.000} {6,9:0.000} {7,8:0.000}", f, t, t / clip.length, d, spd,
                    Vector3.Dot(lh.position - hips.position, fwd), Vector3.Dot(rh.position - hips.position, fwd), Vector3.Dot(rh.position - hips.position, up)));
            }
            foreach (var r in rows) sb.Append(r).Append('\n');
            // 발사 후보 = 최대 당김 이후 양손 거리가 최대의 85% 아래로 처음 떨어지는 프레임
            int rel = -1;
            for (int f = maxF + 1; f <= frames; f++) if (dists[f] < maxDist * 0.85f) { rel = f; break; }
            sb.Append("maxDraw f").Append(maxF).Append(" (norm ").Append((maxF / 30f / clip.length).ToString("0.00")).Append(") dist ").Append(maxDist.ToString("0.000"))
              .Append(" · release candidate f").Append(rel).Append(rel >= 0 ? " (norm " + (rel / 30f / clip.length).ToString("0.00") + ")" : "");
            return sb.ToString();
        }
        finally
        {
            if (animMode) AnimationMode.StopAnimationMode();
            EditorSceneManager.ClosePreviewScene(scene);
        }
    }
}