from typing import List, Optional, Union
from pydantic import BaseModel, ConfigDict, RootModel


class ImageContent(BaseModel):
    """Model for image content in messages."""
    type: str
    image_url: dict


class TextContent(BaseModel):
    """Model for text content in messages."""
    type: str
    text: str


class MessageContent(RootModel):
    """Model for message content that can be either text or image."""
    root: Union[TextContent, ImageContent]


class OpenAIChatMessage(BaseModel):
    """Model for chat messages in OpenAI format."""
    role: str
    content: Union[str, List[MessageContent]]
    model_config = ConfigDict(extra="allow")


class OpenAIChatCompletionForm(BaseModel):
    """Model for chat completion request parameters."""
    stream: bool = True
    model: str
    messages: List[OpenAIChatMessage]
    model_config = ConfigDict(extra="allow")


class FilterForm(BaseModel):
    """Model for filter request parameters."""
    body: dict
    user: Optional[dict] = None
    model_config = ConfigDict(extra="allow")