from __future__ import annotations

from yuxi.channels.adapters.nostr.crypto import normalize_pubkey


def normalize_target(raw: str) -> str:
    if not raw:
        return ""
    cleaned = raw.strip().lower()
    if cleaned.startswith("nostr:"):
        cleaned = cleaned[6:]
    normalized = normalize_pubkey(cleaned)
    if normalized:
        return normalized
    return ""


def looks_like_id(raw: str) -> bool:
    if not raw:
        return False
    cleaned = raw.strip().lower()
    if cleaned.startswith("nostr:"):
        cleaned = cleaned[6:]
    if cleaned.startswith("npub1") and len(cleaned) == 63:
        return True
    if cleaned.startswith("nprofile1"):
        return True
    if len(cleaned) == 64 and all(c in "0123456789abcdef" for c in cleaned):
        return True
    return False


def hint() -> str:
    return "<npub|hex pubkey|nprofile>"