"""修复 openai_compat_service.py 中被 PowerShell Set-Content 损坏的编码"""
import re

path = 'backend/app/services/openai_compat_service.py'

with open(path, 'rb') as f:
    raw = f.read()

# PowerShell Set-Content 用 UTF-16LE 写入，但文件头没有 BOM，导致中文乱码
# 尝试以 utf-16-le 解码
try:
    text = raw.decode('utf-16-le')
    print("Decoded as utf-16-le")
except Exception:
    # 已经是 utf-8，只是有替换字符 \ufffd
    text = raw.decode('utf-8', errors='replace')
    print("Decoded as utf-8 with replacement")

# 修复已知的损坏模式：注释末尾被截断后紧跟下一行代码
# 模式：中文注释 + \ufffd + 空格 + 代码
text = re.sub(r'[\ufffd\x00]+\s*', '\n        ', text)

# 写回 utf-8
with open(path, 'w', encoding='utf-8') as f:
    f.write(text)

print("Done. Check the file manually for remaining issues.")