import logging
import re

from fastapi import APIRouter, HTTPException, status
from sqlalchemy.exc import IntegrityError

from app.api.dependencies import CurrentOwnerUser, SessionDep
from app.crud import user_crud
from app.database.models.user_model import UserRole
from app.schemas.user_schemas import UserRegister, UserUpdate

logger = logging.getLogger(__name__)

INTERNAL_SERVER_ERROR = HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="Internal server error")


router = APIRouter(
    prefix="/user",
    tags=["User", "Dashboard"]
)


@router.get("", summary="Get information about currently logged in user")
async def get_user(session: SessionDep, current_user: CurrentOwnerUser):
    pass


@router.post("", summary="Register new user", status_code=status.HTTP_201_CREATED, response_model=bool)
async def register(session: SessionDep, user_data: UserRegister):
    try:
        user_crud.create_user(session, user_data, None, UserRole.OWNER)
        return True
    except IntegrityError as e:
        field_mapping = {"uuid": "email"}  # If a UUID is duplicate, it means email is in use

        constraint = e.orig.diag.constraint_name
        column_name = re.sub(r"^user_(\w+)_key$", r"\1", constraint) if constraint else None

        if column_name == "uuid":
            column_name = "email"

        detail = f"{field_mapping.get(column_name, column_name or 'Entry').capitalize()} already in use"

        raise HTTPException(
            status_code=status.HTTP_409_CONFLICT,
            detail=detail
        )
    except Exception as e:
        if isinstance(e, HTTPException):
            raise
        logger.error(e)
        raise INTERNAL_SERVER_ERROR


@router.delete("", summary="Delete user")
async def delete_user():
    raise HTTPException(status_code=status.HTTP_501_NOT_IMPLEMENTED, detail="delete_user() not implemented")


@router.put("", summary="Update user details")
async def update_user(data: UserUpdate):
    raise HTTPException(status_code=status.HTTP_501_NOT_IMPLEMENTED, detail="update_user() not implemented")