from __future__ import annotations

from dataclasses import dataclass, field


@dataclass(slots=True)
class PersonIdentity:
    person_id: str
    role: str = "customer"
    track_id: str | None = None
    state: str = "active"
    dwell_seconds: int = 0
    last_seen_ts: int = 0
    pause_start_ts: int | None = None
    embedding: list[float] = field(default_factory=list)


@dataclass(slots=True)
class AlertEvent:
    event: str
    camera_id: str
    ts: str
    payload: dict