from fastapi import APIRouter, Depends
from sqlalchemy import func, select
from sqlalchemy.orm import Session

from app import quota
from app.auth import current_user
from app.db import get_db
from app.models import Channel, Subscription, User, Video
from app.sync.subscriptions import import_subscriptions

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


@router.post("/subscriptions")
def sync_subscriptions(
    user: User = Depends(current_user), db: Session = Depends(get_db)
) -> dict:
    before = quota.units_used_today(db)
    result = import_subscriptions(db, user)
    result["quota_used_estimate"] = quota.units_used_today(db) - before
    result["quota_remaining_today"] = quota.remaining_today(db)
    return result


@router.get("/status")
def sync_status(
    user: User = Depends(current_user), db: Session = Depends(get_db)
) -> dict:
    sub_count = db.scalar(
        select(func.count())
        .select_from(Subscription)
        .where(Subscription.user_id == user.id)
    )
    return {
        "subscriptions": sub_count,
        "channels_total": db.scalar(select(func.count()).select_from(Channel)),
        "videos_total": db.scalar(select(func.count()).select_from(Video)),
        "quota_used_today": quota.units_used_today(db),
        "quota_remaining_today": quota.remaining_today(db),
    }