from pydantic import BaseModel, Field
from typing import List,Literal,Any

class LibraryModel(BaseModel):
    name: str = Field(..., description="Name of the module that has changed")
    action: Literal["added", "removed", "modified"] = Field(..., description="Action performed on that module", examples=["added", "removed", "modified"])
    change_type: str = Field(..., description="The field or the data that has changed in the module")
    changed_by: str = Field(..., description="The user who made the change")
    timestamp: str = Field(..., description="Timestamp of the change in ISO format")
    change_id: int = Field(..., description="Unique identifier for the change in the module")
    change_from: Any = Field(..., description="The previous value of the field that has changed")
    change_to: Any = Field(..., description="The new value of the field that has changed") 
    title: str = Field(..., description="Title of the module that has changed")
    unique_identifier: Literal["library","scheduling"] = Field(..., description="Info about the module that has changed", examples=["library", "scheduling"])