from datetime import datetime, timedelta, timezone

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

from app.auth import get_current_admin
from app.database import get_db
from app.models import AdminUser, OutboundClick
from app.schemas import ClickSummaryItem, OutboundClickPublic

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


@router.get("/clicks/summary", response_model=list[ClickSummaryItem])
def click_summary(
    days: int = 30,
    db: Session = Depends(get_db),
    _: AdminUser = Depends(get_current_admin),
):
    since = datetime.now(timezone.utc) - timedelta(days=max(1, min(days, 365)))
    rows = (
        db.query(OutboundClick.link_kind, func.count(OutboundClick.id))
        .filter(OutboundClick.created_at >= since)
        .group_by(OutboundClick.link_kind)
        .order_by(func.count(OutboundClick.id).desc())
        .all()
    )
    return [ClickSummaryItem(link_kind=kind, count=count) for kind, count in rows]


@router.get("/clicks/recent", response_model=list[OutboundClickPublic])
def recent_clicks(
    limit: int = 50,
    db: Session = Depends(get_db),
    _: AdminUser = Depends(get_current_admin),
):
    limit = max(1, min(limit, 200))
    rows = db.query(OutboundClick).order_by(OutboundClick.id.desc()).limit(limit).all()
    return [OutboundClickPublic.model_validate(r) for r in rows]