from datetime import datetime
from typing import Optional

from pydantic import BaseModel, ConfigDict


class SnapshotBrief(BaseModel):
    """Snapshot metadata without content — used in list endpoints."""

    model_config = ConfigDict(from_attributes=True)

    id: int
    device_id: int
    device_ip: Optional[str] = None
    device_hostname: Optional[str] = None
    sha256: str
    label: Optional[str]
    size: int
    created_at: datetime


class SnapshotDetail(SnapshotBrief):
    """Snapshot with full content — used when viewing a single snapshot."""

    content: str


class SnapshotDiffResponse(BaseModel):
    snapshot_a_id: int
    snapshot_b_id: int
    diff: str
    is_identical: bool