from __future__ import annotations

import random
import time


class EmailSmtpPairingAdapter:
    id_label = "email_address"

    def __init__(self):
        self._codes: dict[str, dict] = {}
        self._code_ttl = 600

    def generate_code(self, peer_id: str) -> str:
        code = str(random.randint(100000, 999999))
        self._codes[peer_id] = {"code": code, "ts": time.monotonic()}
        return code

    def verify_code(self, peer_id: str, code: str) -> bool:
        entry = self._codes.get(peer_id)
        if not entry:
            return False
        if time.monotonic() - entry["ts"] > self._code_ttl:
            del self._codes[peer_id]
            return False
        return entry["code"] == code

    def normalize_allow_entry(self, entry: str) -> str:
        return entry.strip().lower()