"""
/admin endpoints.
"""


from fastapi import APIRouter, Depends, HTTPException, status

from ..config import Config
from ..db import Connection
from ..db.schemata import User, UserCapability, UserCreate
from ._common import Responses, get_current_user

router = APIRouter(prefix="/admin", tags=["admin"])


@router.put(
    "/install",
    responses={
        status.HTTP_200_OK: Responses.OK,
        status.HTTP_400_BAD_REQUEST: Responses.INSTALLED,
    },
)
async def install(
    config: Config,
    admin_user: UserCreate,
    current_config: Config | None = Depends(Config.load),
):
    """
    PUT ./install: Install `kiwi-vpn`.
    """

    # fail if already installed
    if current_config is not None:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST)

    # create config file, connect to database
    await config.save()
    Connection.connect(await config.db.db_engine)

    # create an administrative user
    with Connection.use() as db:
        new_user = User.create(
            db=db,
            user=admin_user,
            crypt_context=await config.crypto.crypt_context,
        )

        new_user.capabilities.append(UserCapability.admin)
        new_user.update(db)


@router.put(
    "/config",
    responses={
        status.HTTP_200_OK: Responses.OK,
        status.HTTP_400_BAD_REQUEST: Responses.NOT_INSTALLED,
        status.HTTP_401_UNAUTHORIZED: Responses.NEEDS_USER,
        status.HTTP_403_FORBIDDEN: Responses.NEEDS_ADMIN,
    },
)
async def set_config(
    new_config: Config,
    current_config: Config | None = Depends(Config.load),
    current_user: User | None = Depends(get_current_user),
):
    """
    PUT ./config: Edit `kiwi-vpn` main config.
    """

    # fail if not installed
    if current_config is None:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST)

    # fail if not requested by an admin
    if (current_user is None
            or UserCapability.admin not in current_user.capabilities):
        raise HTTPException(status_code=status.HTTP_403_FORBIDDEN)

    # update config file, reconnect to database
    await new_config.save()
    Connection.connect(await new_config.db.db_engine)