from datetime import date, datetime, timedelta, timezone

from sqlalchemy.orm import Session

from app.config import settings
from app.models import AlertDispatch, OutboundClick
from app.services.email import send_email

TICKET_KINDS = ("bookmyshow", "district")


def maybe_notify_click_spike(db: Session) -> None:
    if not settings.smtp_configured:
        return

    since = datetime.now(timezone.utc) - timedelta(hours=24)
    count = (
        db.query(OutboundClick)
        .filter(OutboundClick.created_at >= since, OutboundClick.link_kind.in_(TICKET_KINDS))
        .count()
    )
    if count < settings.alert_click_threshold:
        return

    alert_key = f"click_spike_{date.today().isoformat()}"
    if db.query(AlertDispatch).filter(AlertDispatch.alert_key == alert_key).first():
        return

    send_email(
        subject=f"Desi Clans — ticket click spike ({count} in 24h)",
        body=(
            f"Ticket outbound clicks in the last 24 hours: {count}\n"
            f"Threshold: {settings.alert_click_threshold}\n"
            f"City: Bengaluru\n"
            "Check admin analytics for details."
        ),
    )
    db.add(AlertDispatch(alert_key=alert_key))
    db.commit()