#!/usr/bin/env python3
from pathlib import Path
import re
import sys

# ===================== ⚙️ 配置区域 (请修改这里) =====================

# 路径 A、B：需要统计 video ids 的文件夹
A_DIR = Path("/storage/wenzheng/dataset/omni/ChronusAV/video")
B_DIR = Path("/storage/wenzheng/dataset/omni/ChronusAV/video_new")

# 输出文件
OUTPUT_A = Path("ids_video_1.txt")
OUTPUT_B = Path("ids_video_2.txt")

# 是否递归遍历子文件夹
RECURSIVE = True

# 仅统计指定后缀（None 表示不限）。A 路径要求只统计 mp4
EXTENSIONS_A = {".mp4"}
EXTENSIONS_B = {".mp4"}

# 如果文件名里包含 11 位的 YouTube id，则优先提取
ID_PATTERN = re.compile(r"[A-Za-z0-9_-]{11}")

# ===================================================================


def iter_files(root: Path):
    if RECURSIVE:
        yield from (p for p in root.rglob("*") if p.is_file())
    else:
        yield from (p for p in root.iterdir() if p.is_file())


def extract_id(path: Path) -> str:
    name = path.stem
    match = ID_PATTERN.search(name)
    return match.group(0) if match else name


def collect_ids(root: Path, extensions=None):
    ids = []
    for path in iter_files(root):
        if path.name.startswith("."):
            continue
        if extensions is not None and path.suffix.lower() not in extensions:
            continue
        vid = extract_id(path)
        if vid:
            ids.append(vid)
    return sorted(set(ids))


def write_ids(ids, out_path: Path):
    out_path.parent.mkdir(parents=True, exist_ok=True)
    content = "\n".join(ids) + ("\n" if ids else "")
    out_path.write_text(content, encoding="utf-8")


def ensure_dir(path: Path, label: str):
    if not path.is_dir():
        print(f"❌ 错误：{label} 不存在或不是文件夹: {path}")
        sys.exit(1)


def main():
    ensure_dir(A_DIR, "路径 A")
    ensure_dir(B_DIR, "路径 B")

    ids_a = collect_ids(A_DIR, EXTENSIONS_A)
    ids_b = collect_ids(B_DIR, EXTENSIONS_B)

    write_ids(ids_a, OUTPUT_A)
    write_ids(ids_b, OUTPUT_B)

    print("✅ 完成")
    print(f"路径 A: {A_DIR} -> {OUTPUT_A} (共 {len(ids_a)} 条)")
    print(f"路径 B: {B_DIR} -> {OUTPUT_B} (共 {len(ids_b)} 条)")


if __name__ == "__main__":
    main()