#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""爆音资产排查（R6）：扫描 6 游戏全部 .ogg。

检测项：
  1. 峰值 > -1dBFS（有损编码过冲/归一不足）
  2. 首尾 5ms 内电平突变（无淡入淡出 → 爆豆声）。loop 类（bgm/ 与 sfx/amb_*）按
     首尾交叉淡化工艺制造，边界连续是特性，只做 DC/峰值检查，不报爆豆、不修。
  3. 直流偏置（|DC| > 0.001）
输出 JSON 行到 stdout 供汇总；--fix 模式见 fix_clicks.py 逻辑（本文件只扫）。
"""
import os
import sys

import numpy as np
import soundfile as sf

ROOT = "/home/xsl/SoundGame/web"
GAMES = ["storyline", "escape", "simon", "rhythm", "space", "rpg"]
EDGE_MS = 5
DC_THRESH = 0.001
PEAK_THRESH = 10 ** (-1.0 / 20)  # -1dBFS


def is_loop(relpath):
    parts = relpath.split(os.sep)
    return "/bgm/" in "/" + relpath or os.path.basename(relpath).startswith("amb_")


def scan(path):
    y, sr = sf.read(path, always_2d=True)
    mono = y.mean(axis=1)
    peak = float(np.max(np.abs(mono)))
    dc = float(np.mean(mono))
    n5 = max(1, int(sr * EDGE_MS / 1000))
    n1 = max(1, int(sr * 1 / 1000))
    n50 = max(1, int(sr * 50 / 1000))
    head = float(np.max(np.abs(mono[:n5])))
    tail = float(np.max(np.abs(mono[-n5:])))
    # 爆豆判定（突变而非渐变）：首/末 1ms 内的最大幅值 与 相邻 50ms 窗口峰值之比。
    # 正常淡入（8ms cos²）首 1ms 幅值 < 局部峰值 15%；硬边/步进则趋近 1。
    loc_h = float(np.max(np.abs(mono[:n50])))
    loc_t = float(np.max(np.abs(mono[-n50:])))
    FLOOR = 0.01  # 局部窗口低于 -40dB 视为静音区，不判爆豆（编解码底噪残余）
    step_head = loc_h > FLOOR and float(np.max(np.abs(mono[:n1]))) > 0.15 * loc_h
    step_tail = loc_t > FLOOR and float(np.max(np.abs(mono[-n1:]))) > 0.15 * loc_t
    return {
        "path": os.path.relpath(path, ROOT),
        "loop": is_loop(os.path.relpath(path, ROOT)),
        "peak_db": round(20 * np.log10(max(peak, 1e-9)), 2),
        "dc": round(dc, 5),
        "head5ms_db": round(20 * np.log10(max(head, 1e-9)), 2),
        "tail5ms_db": round(20 * np.log10(max(tail, 1e-9)), 2),
        "hot_peak": peak > PEAK_THRESH,
        "dc_bad": abs(dc) > DC_THRESH,
        "click_head": step_head,
        "click_tail": step_tail,
    }


def main():
    results = []
    for g in GAMES:
        base = os.path.join(ROOT, g, "audio")
        for dirpath, _d, files in os.walk(base):
            for f in sorted(files):
                if f.endswith(".ogg"):
                    results.append(scan(os.path.join(dirpath, f)))
    import json
    for r in results:
        print(json.dumps(r, ensure_ascii=False))
    return 0


if __name__ == "__main__":
    sys.exit(main())