"""Telegram — enige externe meldkanaal."""
import os
import httpx


def send_message(text: str, parse_mode: str = "HTML") -> bool:
    token = os.environ.get("TELEGRAM_BOT_TOKEN", "").strip()
    chat_id = os.environ.get("TELEGRAM_CHAT_ID", "").strip()
    if not token or not chat_id:
        return False
    url = f"https://api.telegram.org/bot{token}/sendMessage"
    # Telegram max ~4096
    if len(text) > 4000:
        text = text[:3990] + "…"
    r = httpx.post(
        url,
        data={"chat_id": chat_id, "text": text, "parse_mode": parse_mode},
        timeout=30,
    )
    return r.status_code == 200


def format_alert(severity: str, title: str, body: str, actions=None) -> str:
    icon = {"critical": "🔴", "high": "🟠", "medium": "🟡", "low": "🔵", "info": "⚪"}.get(
        severity, "⚪"
    )
    lines = [
        f"{icon} <b>EL-KADI SECURITY</b> · {severity.upper()}",
        f"<b>{_esc(title)}</b>",
        "",
        _esc(body),
    ]
    if actions:
        lines.append("")
        lines.append("<b>Agent acties:</b>")
        for a in actions:
            lines.append(f"• {_esc(a)}")
    return "\n".join(lines)


def _esc(s: str) -> str:
    return s.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;")