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from typing import Optional

from open_webui.apps.webui.models.models import (
    ModelForm,
    ModelModel,
    ModelResponse,
    Models,
)
from open_webui.constants import ERROR_MESSAGES
from fastapi import APIRouter, Depends, HTTPException, Request, status
from open_webui.utils.utils import get_admin_user, get_verified_user

router = APIRouter()

###########################
# getModels
###########################


@router.get("/", response_model=list[ModelResponse])
async def get_models(id: Optional[str] = None, user=Depends(get_verified_user)):
    if id:
        model = Models.get_model_by_id(id)
        if model:
            return [model]
        else:
            raise HTTPException(
                status_code=status.HTTP_401_UNAUTHORIZED,
                detail=ERROR_MESSAGES.NOT_FOUND,
            )
    else:
        return Models.get_all_models()


############################
# AddNewModel
############################


@router.post("/add", response_model=Optional[ModelModel])
async def add_new_model(
    request: Request,
    form_data: ModelForm,
    user=Depends(get_admin_user),
):
    if form_data.id in request.app.state.MODELS:
        raise HTTPException(
            status_code=status.HTTP_401_UNAUTHORIZED,
            detail=ERROR_MESSAGES.MODEL_ID_TAKEN,
        )
    else:
        model = Models.insert_new_model(form_data, user.id)

        if model:
            return model
        else:
            raise HTTPException(
                status_code=status.HTTP_401_UNAUTHORIZED,
                detail=ERROR_MESSAGES.DEFAULT(),
            )


############################
# UpdateModelById
############################


@router.post("/update", response_model=Optional[ModelModel])
async def update_model_by_id(
    request: Request,
    id: str,
    form_data: ModelForm,
    user=Depends(get_admin_user),
):
    model = Models.get_model_by_id(id)
    if model:
        model = Models.update_model_by_id(id, form_data)
        return model
    else:
        if form_data.id in request.app.state.MODELS:
            model = Models.insert_new_model(form_data, user.id)
            if model:
                return model
            else:
                raise HTTPException(
                    status_code=status.HTTP_401_UNAUTHORIZED,
                    detail=ERROR_MESSAGES.DEFAULT(),
                )
        else:
            raise HTTPException(
                status_code=status.HTTP_401_UNAUTHORIZED,
                detail=ERROR_MESSAGES.DEFAULT(),
            )


############################
# DeleteModelById
############################


@router.delete("/delete", response_model=bool)
async def delete_model_by_id(id: str, user=Depends(get_admin_user)):
    result = Models.delete_model_by_id(id)
    return result