from pydantic import BaseModel, Field
from typing import Any, Dict, List, Optional

class QueryReq(BaseModel):
    user_id: Optional[str] = None
    text: str
    visual_ctx: Optional[Dict[str, Any]] = Field(
        default=None,
        json_schema_extra={"example": {}},
    )

class QueryResp(BaseModel):
    answer_text: str
    citations: List[str] = Field(default_factory=list)
    metrics: Dict[str, Any] = Field(default_factory=dict)
    chart_refs: List[str] = Field(default_factory=list)
    # uncertainty: float = 0.0