from __future__ import annotations

import logging

logger = logging.getLogger(__name__)


def get_olm_store_path(account_id: str = "default") -> str:
    return f"data/matrix_store/{account_id}"


def is_decryption_failure(event) -> bool:
    source = getattr(event, "source", {})
    return source.get("type") == "m.room.encrypted" and "body" not in source.get("content", {})


def diagnose_decryption(event) -> dict:
    source = getattr(event, "source", {})
    content = source.get("content", {})
    ciphertext = content.get("ciphertext", "")
    return {
        "event_id": getattr(event, "event_id", ""),
        "room_id": getattr(event, "room_id", ""),
        "has_body": "body" in content,
        "algorithm": content.get("algorithm", "unknown"),
        "sender_key": (content.get("sender_key", "") or "")[:16] + "...",
        "session_id": content.get("session_id", "unknown"),
        "ciphertext_len": len(ciphertext) if ciphertext else 0,
    }