from __future__ import annotations

from typing import Any


def list_peers(allow_from: list[str]) -> list[dict[str, Any]]:
    peers: list[dict[str, Any]] = []
    for entry in allow_from:
        if entry == "*":
            continue
        normalized = normalize_id(entry)
        peers.append({"id": normalized, "raw": entry, "type": "user"})
    return peers


def list_groups(groups_config: dict[str, Any]) -> list[dict[str, Any]]:
    groups: list[dict[str, Any]] = []
    for space_name, cfg in groups_config.items():
        if not isinstance(cfg, dict):
            continue
        groups.append(
            {
                "id": space_name,
                "type": "space",
                "name": cfg.get("name", space_name),
                "enabled": cfg.get("enabled", True),
                "requires_mention": cfg.get("require_mention", cfg.get("requireMention", False)),
            }
        )
    return groups


def normalize_id(raw: str) -> str:
    if not raw:
        return ""
    raw = raw.strip()
    if raw.startswith("spaces/"):
        return raw
    if raw.startswith("users/"):
        return raw
    if raw.startswith("user:"):
        return raw.replace("user:", "users/", 1)
    if "@" in raw:
        return f"users/{raw}"
    return f"users/{raw}"