# app/models/schemas/chain.py — Chain Pydantic models
from __future__ import annotations

from pydantic import BaseModel


class ChainCreate(BaseModel):
    name: str


class ChainRow(BaseModel):
    id: str
    name: str
    created_at: float
    node_count: int = 0


class ChainTree(BaseModel):
    id: str
    name: str
    created_at: float
    nodes: list["NodeRow"] = []


# Avoid circular import — NodeRow imported at runtime
from app.models.schemas.node import NodeRow  # noqa: E402
ChainTree.model_rebuild()