from typing import List, Optional
from pydantic import BaseModel


class CsvFieldsRequest(BaseModel):
    csv_url: str

class FieldMetadata(BaseModel):
    name: str
    type: str
    nullable: bool
    isPrimaryKey: bool

class CsvFieldsResponse(BaseModel):
    success: bool
    fields: List[FieldMetadata]
    error: Optional[str] = None
    request_id: str