#!/usr/bin/env python3
from dotenv import load_dotenv
load_dotenv('/opt/rinet-gpu/.env.master')
# auto-added by patch_scrapers_with_dotenv.sh
# ==============================================================================
# notif_router.py — Notification center API for /app#notif
# Author : Damir Radulić — dradulic@outlook.com / damir@rinet.one
# Version: 1.0.0
# Date   : 2026-05-05
# Purpose: REST endpoints under /api/v2/notif/* powering the in-app
#          notification center. Operates on pgz_sport.notifications table
#          (extended by migrations/notifications_20260505.sql).
# Routes : GET   /api/v2/notif/list?unread_only=&limit=&user_id=
#          GET   /api/v2/notif/count?user_id=
#          POST  /api/v2/notif/{id}/read
#          POST  /api/v2/notif/mark-all-read
#          DELETE /api/v2/notif/{id}
# ==============================================================================
from __future__ import annotations
import os

from typing import Optional, List, Dict, Any
from fastapi import APIRouter, HTTPException, Query, Header
from pydantic import BaseModel
import psycopg2
import psycopg2.extras

# Reuse the v2 DB config (same as pgz_sport_v2_router)
DB = dict(
    host="10.10.0.2",
    port=6432,
    dbname="rinet_v3",
    user="rinet",
    password=os.environ["DB_PASSWORD"],
)

router = APIRouter(prefix="/api/v2/notif", tags=["pgz_sport_notif"])


# ----------------------------- helpers ---------------------------------------
def _conn():
    return psycopg2.connect(**DB)


def _row(r) -> Dict[str, Any]:
    if r is None:
        return {}
    if isinstance(r, dict):
        d = dict(r)
    else:
        d = dict(r)
    # JSON-friendly conversions
    for k, v in list(d.items()):
        if hasattr(v, "isoformat"):
            d[k] = v.isoformat()
    return d


def _resolve_user_id(authorization: Optional[str]) -> Optional[int]:
    """Best-effort: pull user_id from Bearer token. Tries JWT (auth_v2) first
    then falls back to legacy session-token-hash lookup."""
    if not authorization:
        return None
    token = authorization.replace("Bearer ", "").strip()
    if not token:
        return None
    # 1) Try JWT (preferred — current auth)
    try:
        from auth.auth_v2 import decode_token  # type: ignore
        payload = decode_token(token)
        sub = payload.get("sub")
        if sub is not None:
            try:
                return int(sub)
            except (TypeError, ValueError):
                pass
    except Exception:
        pass
    # 2) Legacy: SHA-256 hash lookup in user_sessions
    import hashlib
    th = hashlib.sha256(token.encode()).hexdigest()
    try:
        with _conn() as c:
            cur = c.cursor()
            cur.execute(
                """SELECT user_id FROM pgz_sport.user_sessions
                    WHERE token_hash=%s AND revoked=false AND expires_at>now()
                    LIMIT 1""",
                (th,),
            )
            r = cur.fetchone()
            return r[0] if r else None
    except Exception:
        return None


# ----------------------------- LIST ------------------------------------------
@router.get("/list")
def notif_list(
    unread_only: bool = Query(False),
    limit: int = Query(50, ge=1, le=500),
    user_id: Optional[int] = Query(None, description="Override (admin); else taken from JWT"),
    authorization: Optional[str] = Header(None),
):
    """
    Returns InApp notifications visible to the user. System-wide (user_id IS NULL)
    rows are always included. If no auth + no user_id, returns only system-wide.
    """
    uid = user_id if user_id is not None else _resolve_user_id(authorization)

    where = ["channel = 'inapp'"]
    params: List[Any] = []
    if uid is not None:
        where.append("(user_id = %s OR user_id IS NULL)")
        params.append(uid)
    else:
        where.append("user_id IS NULL")

    if unread_only:
        where.append("COALESCE(is_read, false) = false")

    sql = f"""
      SELECT id, user_id, kind, title, COALESCE(subject, title) AS subject, body,
             link, COALESCE(is_read, read_at IS NOT NULL) AS is_read,
             status, created_at, read_at
        FROM pgz_sport.notifications
       WHERE {' AND '.join(where)}
       ORDER BY created_at DESC NULLS LAST, id DESC
       LIMIT %s
    """
    params.append(limit)

    with _conn() as conn:
        cur = conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor)
        cur.execute(sql, params)
        rows = [_row(r) for r in cur.fetchall()]
    return {"count": len(rows), "rows": rows, "user_id": uid}


# ----------------------------- COUNT -----------------------------------------
@router.get("/count")
def notif_count(
    user_id: Optional[int] = Query(None),
    authorization: Optional[str] = Header(None),
):
    uid = user_id if user_id is not None else _resolve_user_id(authorization)

    where = ["channel = 'inapp'"]
    params: List[Any] = []
    if uid is not None:
        where.append("(user_id = %s OR user_id IS NULL)")
        params.append(uid)
    else:
        where.append("user_id IS NULL")

    sql = f"""
      SELECT
        COUNT(*) FILTER (WHERE COALESCE(is_read, read_at IS NOT NULL) = false) AS unread,
        COUNT(*) AS total
      FROM pgz_sport.notifications
      WHERE {' AND '.join(where)}
    """
    with _conn() as conn:
        cur = conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor)
        cur.execute(sql, params)
        r = cur.fetchone() or {"unread": 0, "total": 0}
    return {
        "unread": int(r["unread"] or 0),
        "total": int(r["total"] or 0),
        "user_id": uid,
    }


# ----------------------------- MARK ONE READ ---------------------------------
@router.post("/{nid}/read")
def notif_mark_read(nid: int):
    with _conn() as conn:
        cur = conn.cursor()
        cur.execute(
            """UPDATE pgz_sport.notifications
                  SET is_read = true,
                      read_at = COALESCE(read_at, now()),
                      status  = CASE WHEN status='pending' THEN 'sent' ELSE status END
                WHERE id = %s
                RETURNING id""",
            (nid,),
        )
        r = cur.fetchone()
        if not r:
            raise HTTPException(404, "Notifikacija ne postoji")
        conn.commit()
    return {"ok": True, "id": nid, "is_read": True}


# ----------------------------- MARK ALL READ ---------------------------------
class MarkAllIn(BaseModel):
    user_id: Optional[int] = None
    include_system: bool = True


@router.post("/mark-all-read")
def notif_mark_all_read(
    body: Optional[MarkAllIn] = None,
    authorization: Optional[str] = Header(None),
):
    body = body or MarkAllIn()
    uid = body.user_id if body.user_id is not None else _resolve_user_id(authorization)

    where = ["channel = 'inapp'", "COALESCE(is_read, false) = false"]
    params: List[Any] = []
    if uid is not None:
        if body.include_system:
            where.append("(user_id = %s OR user_id IS NULL)")
        else:
            where.append("user_id = %s")
        params.append(uid)
    else:
        where.append("user_id IS NULL")

    with _conn() as conn:
        cur = conn.cursor()
        cur.execute(
            f"""UPDATE pgz_sport.notifications
                  SET is_read = true,
                      read_at = COALESCE(read_at, now()),
                      status  = CASE WHEN status='pending' THEN 'sent' ELSE status END
                WHERE {' AND '.join(where)}
                RETURNING id""",
            params,
        )
        ids = [r[0] for r in cur.fetchall()]
        conn.commit()
    return {"ok": True, "marked_read": len(ids), "ids": ids[:500], "user_id": uid}


# ----------------------------- DELETE ----------------------------------------
@router.delete("/{nid}")
def notif_delete(nid: int):
    with _conn() as conn:
        cur = conn.cursor()
        cur.execute(
            "DELETE FROM pgz_sport.notifications WHERE id = %s RETURNING id",
            (nid,),
        )
        r = cur.fetchone()
        if not r:
            raise HTTPException(404, "Notifikacija ne postoji")
        conn.commit()
    return {"ok": True, "id": nid, "deleted": True}