"""用户头像 URL 解析（sys_user.avatar 可能存 MinIO 相对路径或完整 URL）"""
from typing import Optional

from app.core.config import settings
from app.core.storage import storage


def resolve_avatar_display_url(raw: Optional[str]) -> Optional[str]:
    """服务端内部拼完整 URL（邮件等）；Web API 应返回库中原始路径。"""
    if raw is None:
        return None
    s = str(raw).strip()
    if not s:
        return None
    lower = s.lower()
    if lower.startswith("http://") or lower.startswith("https://") or s.startswith("/"):
        return s
    try:
        return storage.get_url(s.lstrip("/"))
    except Exception:
        base = (settings.MINIO_BASE_URL or settings.LOCAL_STORAGE_URL or "").rstrip("/")
        if base:
            return f"{base}/{s.lstrip('/')}"
        return s


def extract_avatar_storage_key(full_url: str) -> str:
    """从 upload 返回值或历史完整 URL 中提取 avatar/ 相对路径。"""
    u = (full_url or "").strip()
    if not u:
        return ""
    base_url = (settings.MINIO_BASE_URL or "").rstrip("/")
    if base_url and u.startswith(base_url + "/"):
        return u[len(base_url) + 1 :].lstrip("/")
    marker = "/avatar/"
    idx = u.lower().find(marker)
    if idx >= 0:
        return f"avatar/{u[idx + len(marker) :].lstrip('/')}"
    if not u.lower().startswith("http") and not u.startswith("/"):
        return u.lstrip("/")
    return u