import os
import re
from datetime import datetime
# ====================== 【配置区，请修改】 ======================
MEDIA_FOLDER = "/Volumes/JoyDisk/myMedia/olstrms/电影/未分类/2024"
DRY_RUN = True          # True预览不修改；确认后改为False
SKIP_PROCESSED = False
LOG_FILE = "./rename_log.txt"
# =================================================================
RULES = [
    (r"^[A-Za-z] ", ""),                 #1.开头单个字母+空格
    (r"\[.*?\]", ""),                    #2.英文方括号
    (r"【.*?】", ""),                    #2.中文方括号
    (r"\b(2160p|1080p|720p|HDR|DV|DoVi|HEVC|x265|x264|DDP|AAC|Atmos|TrueHD|中英双语)\b", "", re.IGNORECASE),
    (r"\.+", ""),                        #4.连续多点删除
    (r"\s", ""),                         #5.删除全部空格
]
ALLOW_EXT = {".mkv", ".mp4", ".mov", ".srt", ".ass", ".sub"}

def clean_name(name: str) -> str:
    name_no_ext, ext = os.path.splitext(name)
    for item in RULES:
        if len(item) == 3:
            pattern, repl, flag = item
            name_no_ext = re.sub(pattern, repl, name_no_ext, flags=flag)
        else:
            pattern, repl = item
            name_no_ext = re.sub(pattern, repl, name_no_ext)
    name_no_ext = re.sub(r"\s+", " ", name_no_ext).strip()
    return name_no_ext + ext

def write_log(msg: str):
    time_str = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
    line = f"[{time_str}] {msg}"
    print(line)
    with open(LOG_FILE, "a", encoding="utf-8") as f:
        f.write(line + "\n")

if __name__ == "__main__":
    write_log("===== 文件名+文件夹清洗【递归处理全部下级子目录】 =====")
    write_log(f"根目录：{MEDIA_FOLDER}")
    write_log(f"预览模式 DRY_RUN = {DRY_RUN}")
    write_log("说明：递归扫描全部子目录，先收集所有待改，执行时【先文件、后文件夹】避免路径失效")
    dir_rename_list = []
    file_rename_list = []

    for root, dirs, files in os.walk(MEDIA_FOLDER, topdown=False):
        write_log(f"\n==== 扫描目录：{root} | 当前目录文件数量：{len(files)} ====")
        # 处理文件
        for fname in files:
            ext = os.path.splitext(fname)[1].lower()
            if ext not in ALLOW_EXT:
                continue
            new_name = clean_name(fname)
            if new_name != fname:
                if SKIP_PROCESSED and re.search(r"\(\d{4}\)", new_name):
                    write_log(f"【跳过文件】{fname}，检测年份括号")
                    continue
                old_path = os.path.join(root, fname)
                new_path = os.path.join(root, new_name)
                file_rename_list.append((old_path, new_path))
                write_log(f"【待改文件】{fname} → {new_name}")
        # 处理文件夹
        for dname in dirs:
            new_name = clean_name(dname)
            if new_name != dname:
                if SKIP_PROCESSED and re.search(r"\(\d{4}\)", new_name):
                    write_log(f"【跳过文件夹】{dname}，检测年份括号")
                    continue
                old_path = os.path.join(root, dname)
                new_path = os.path.join(root, new_name)
                dir_rename_list.append((old_path, new_name))
                write_log(f"【待改文件夹】{dname} → {new_name}")

    # 执行顺序：先全部文件，再全部文件夹
    file_count = 0
    for old, new in file_rename_list:
        write_log(f"【执行文件】{os.path.basename(old)} → {os.path.basename(new)}")
        file_count +=1
        if not DRY_RUN:
            os.rename(old, new)

    dir_count = 0
    for old, new in dir_rename_list:
        write_log(f"【执行文件夹】{os.path.basename(old)} → {os.path.basename(new)}")
        dir_count +=1
        if not DRY_RUN:
            os.rename(old, new)

    write_log(f"\n任务完成，待修改文件夹：{dir_count}，待修改文件：{file_count}")
    write_log("="*60 + "\n")