"""Извлечение полей для учёта алерта из тела вебхука Grafana (Unified Alerting)."""

from __future__ import annotations

import json
from typing import Any


def extract_alert_row_from_grafana_body(body: dict[str, Any]) -> tuple[str, str, dict[str, Any], str | None]:
    """
    Возвращает: title, severity (info|warning|critical), labels (dict), fingerprint.
    """
    title = str(body.get("title") or body.get("ruleName") or "").strip()[:500]
    alerts = body.get("alerts")
    labels: dict[str, Any] = {}
    fingerprint: str | None = None
    sev = "warning"

    if isinstance(alerts, list) and alerts and isinstance(alerts[0], dict):
        a0 = alerts[0]
        fp = a0.get("fingerprint")
        if fp is not None:
            fingerprint = str(fp)[:500]
        if isinstance(a0.get("labels"), dict):
            labels.update(a0["labels"])
        ann = a0.get("annotations")
        if isinstance(ann, dict) and not title:
            title = str(ann.get("summary") or ann.get("description") or "").strip()[:500]

    cl = body.get("commonLabels")
    if isinstance(cl, dict):
        for k, v in cl.items():
            labels.setdefault(k, v)

    if not title and isinstance(alerts, list) and alerts and isinstance(alerts[0], dict):
        title = str(alerts[0].get("labels", {}).get("alertname") or "").strip()[:500]

    raw_s = None
    if isinstance(labels.get("severity"), str):
        raw_s = labels["severity"].lower()
    elif isinstance(labels.get("priority"), str):
        raw_s = labels["priority"].lower()
    if raw_s in ("critical", "error", "fatal"):
        sev = "critical"
    elif raw_s in ("warning", "warn"):
        sev = "warning"
    elif raw_s in ("info", "informational", "none"):
        sev = "info"

    # JSONB: только JSON-совместимые значения
    clean_labels = {str(k): v for k, v in labels.items() if isinstance(v, (str, int, float, bool, type(None)))}

    return title, sev, clean_labels, fingerprint