from dataclasses import dataclass
from typing import Dict, List, Optional


@dataclass
class TelemetryContract:
    dataset: str
    schema: Dict[str, object]
    privacy_flags: Dict[str, bool]
    retention: Optional[int] = None


@dataclass
class VisualizationWidget:
    widget_type: str
    aggregations: List[str]
    color_schema: Dict[str, str]


@dataclass
class AccessPolicy:
    roles: List[str]
    viewers: List[str]
    editors: List[str]


__all__ = [
    "TelemetryContract",
    "VisualizationWidget",
    "AccessPolicy",
]