"""Safe external profile fields derived from captured player identifiers."""

from __future__ import annotations

import re


_STEAM_ID64_RE = re.compile(r"^\d{17}$")
_EPIC_ID_RE = re.compile(r"^[0-9a-f]{32}$", re.IGNORECASE)


def build_external_player_profile_fields(
    *,
    player_id: object = None,
    steam_id: object = None,
) -> dict[str, object]:
    """Expose player profile links only when a captured SteamID64 is valid."""
    steam_id_64 = normalize_steam_id_64(steam_id) or normalize_steam_id_64(player_id)
    if steam_id_64:
        return {
            "steam_id_64": steam_id_64,
            "platform": "steam",
            "external_profile_links": {
                "steam": f"https://steamcommunity.com/profiles/{steam_id_64}",
                "hellor": f"https://hellor.pro/player/{steam_id_64}",
                "hll_records": f"https://hllrecords.com/profiles/{steam_id_64}",
            },
        }
    return {"platform": infer_player_platform(player_id=player_id, steam_id=steam_id)}


def normalize_steam_id_64(value: object) -> str | None:
    normalized = str(value or "").strip()
    return normalized if _STEAM_ID64_RE.fullmatch(normalized) else None


def infer_player_platform(*, player_id: object = None, steam_id: object = None) -> str:
    normalized_player_id = str(player_id or "").strip()
    if normalize_steam_id_64(steam_id) or normalize_steam_id_64(normalized_player_id):
        return "steam"
    if _EPIC_ID_RE.fullmatch(normalized_player_id):
        return "epic"
    return "unknown"