from typing import List

from pydantic import BaseModel, Field


class Message(BaseModel):
    role: str
    content: str


class ChatRequest(BaseModel):
    model: str = "gpt-oss"
    messages: List[Message]
    max_tokens: int = Field(default=256, ge=1, le=4096)
    temperature: float = Field(default=0.7, ge=0, le=2)


class ChatResponse(BaseModel):
    id: str
    choices: List[dict]
    usage: dict
    model: str