# modules/admin/api.py
from typing import Annotated, Optional
from fastapi import APIRouter, Depends, HTTPException, status
from pydantic import BaseModel
from sqlalchemy.orm import Session
from core.database import get_db
from modules.auth.dependencies import admin_only
from modules.auth.models import User
from modules.notifications.service import send_push_notification
from .tasks import cleardb

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


class ClearDbRequest(BaseModel):
    hard: bool


class SendNotificationRequest(BaseModel):
    username: str
    title: str
    body: str
    data: Optional[dict] = None


@router.get("/")
def read_admin():
    return {"message": "Admin route"}


@router.post("/cleardb")
def clear_db(payload: ClearDbRequest, db: Annotated[Session, Depends(get_db)]):
    """
    Clear the database based on the 'hard' flag in the request body.
    'hard'=True: Drop and recreate all tables.
    'hard'=False: Delete data from tables except users.
    """
    hard = payload.hard
    cleardb.delay(hard)
    return {"message": "Clearing database in the background", "hard": hard}


@router.post("/send-notification", status_code=status.HTTP_200_OK)
async def send_user_notification(
    payload: SendNotificationRequest,
    db: Annotated[Session, Depends(get_db)],
):
    """
    Admin endpoint to send a push notification to a specific user by username.
    """
    target_user = db.query(User).filter(User.username == payload.username).first()

    if not target_user:
        raise HTTPException(
            status_code=status.HTTP_404_NOT_FOUND,
            detail=f"User with username '{payload.username}' not found.",
        )

    if not target_user.expo_push_token:
        raise HTTPException(
            status_code=status.HTTP_400_BAD_REQUEST,
            detail=f"User '{payload.username}' does not have a registered push token.",
        )

    success = await send_push_notification(
        push_token=target_user.expo_push_token,
        title=payload.title,
        body=payload.body,
        data=payload.data,
    )

    if not success:
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR,
            detail="Failed to send push notification via Expo service.",
        )

    return {
        "message": f"Push notification sent successfully to user '{payload.username}'"
    }