# This file was auto-generated by Fern from our API Definition.

from ..core.unchecked_base_model import UncheckedBaseModel
import pydantic
import typing
from .tool_call import ToolCall
from ..core.pydantic_utilities import IS_PYDANTIC_V2


class ChatMessage(UncheckedBaseModel):
    """
    Represents a single message in the chat history, excluding the current user turn. It has two properties: `role` and `message`. The `role` identifies the sender (`CHATBOT`, `SYSTEM`, or `USER`), while the `message` contains the text content.

    The chat_history parameter should not be used for `SYSTEM` messages in most cases. Instead, to add a `SYSTEM` role message at the beginning of a conversation, the `preamble` parameter should be used.
    """

    message: str = pydantic.Field()
    """
    Contents of the chat message.
    """

    tool_calls: typing.Optional[typing.List[ToolCall]] = None

    if IS_PYDANTIC_V2:
        model_config: typing.ClassVar[pydantic.ConfigDict] = pydantic.ConfigDict(extra="allow")  # type: ignore # Pydantic v2
    else:

        class Config:
            smart_union = True
            extra = pydantic.Extra.allow