"""BAN YARO — Notification Center Routes"""

import logging
from fastapi import APIRouter, Depends, HTTPException

from database import db
from auth import get_current_user

router = APIRouter()
logger = logging.getLogger(__name__)


# ------------------------------------------------------------------
# GET /api/notifications  — letzte 50 Benachrichtigungen des Users
# ------------------------------------------------------------------
@router.get("")
async def list_notifications(user=Depends(get_current_user)):
    with db() as conn:
        rows = conn.execute(
            """SELECT id, type, title, body, data, read_at, created_at
               FROM notifications
               WHERE user_id = ?
               ORDER BY created_at DESC
               LIMIT 50""",
            (user["id"],),
        ).fetchall()
    return [dict(r) for r in rows]


# ------------------------------------------------------------------
# GET /api/notifications/unread-count  — Anzahl ungelesener Einträge
# ------------------------------------------------------------------
@router.get("/unread-count")
async def unread_count(user=Depends(get_current_user)):
    with db() as conn:
        row = conn.execute(
            "SELECT COUNT(*) FROM notifications WHERE user_id=? AND read_at IS NULL",
            (user["id"],),
        ).fetchone()
    return {"count": row[0]}


# ------------------------------------------------------------------
# GET /api/notifications/badge  — Dot-Indikatoren für Header
# personal: Chat, Freunde, Trainer, Sitting, Gesundheit, Meilensteine
# general:  Gassi-Treffen, Giftköder, Verlorene Hunde, Wetter
# ------------------------------------------------------------------
_PERSONAL = {
    'chat_message', 'friend_request', 'weekly_praise',
    'health_reminder', 'milestone',
    'sitting_request', 'sitting_confirmed', 'sitting_cancelled',
}
_GENERAL = {
    'walk_invite', 'lost_dog_alert', 'poison_alert',
    'weather_heat', 'weather_thunder',
}

@router.get("/badge")
async def badge_status(user=Depends(get_current_user)):
    with db() as conn:
        rows = conn.execute(
            "SELECT DISTINCT type FROM notifications WHERE user_id=? AND read_at IS NULL",
            (user["id"],),
        ).fetchall()
    types = {r["type"] for r in rows}
    return {
        "personal": bool(types & _PERSONAL),
        "general":  bool(types & _GENERAL),
    }


# ------------------------------------------------------------------
# PATCH /api/notifications/read-all  — alle als gelesen markieren
# ------------------------------------------------------------------
@router.patch("/read-all")
async def read_all(user=Depends(get_current_user)):
    with db() as conn:
        conn.execute(
            """UPDATE notifications
               SET read_at = datetime('now')
               WHERE user_id = ? AND read_at IS NULL""",
            (user["id"],),
        )
    return {"ok": True}


# ------------------------------------------------------------------
# PATCH /api/notifications/{id}/read  — einzelne als gelesen markieren
# ------------------------------------------------------------------
@router.patch("/{notif_id}/read")
async def read_one(notif_id: int, user=Depends(get_current_user)):
    with db() as conn:
        row = conn.execute(
            "SELECT id FROM notifications WHERE id=? AND user_id=?",
            (notif_id, user["id"]),
        ).fetchone()
        if not row:
            raise HTTPException(404, "Benachrichtigung nicht gefunden.")
        conn.execute(
            "UPDATE notifications SET read_at = datetime('now') WHERE id=?",
            (notif_id,),
        )
    return {"ok": True}


# ------------------------------------------------------------------
# DELETE /api/notifications/{id}  — löschen
# ------------------------------------------------------------------
@router.delete("/{notif_id}")
async def delete_one(notif_id: int, user=Depends(get_current_user)):
    with db() as conn:
        row = conn.execute(
            "SELECT id FROM notifications WHERE id=? AND user_id=?",
            (notif_id, user["id"]),
        ).fetchone()
        if not row:
            raise HTTPException(404, "Benachrichtigung nicht gefunden.")
        conn.execute("DELETE FROM notifications WHERE id=?", (notif_id,))
    return {"ok": True}