// hive-warn.js — <hive-warn>, the shared inline warning-banner
// component. Consolidates three independently-written instances of the
// same thing: `.cred-warning` (credentials.html, static
// markup), `.tombstone-warn` (core.js, JS-built), `.port-conflict`
// (swarm.js, JS-built) — the first two differed only by an
// undeliberate 10% vs 8% tint, the strongest evidence this was drift,
// not three genuinely different needs.
//
// Purely presentational — no internal state, no lifecycle beyond
// attaching its shadow root once. `level` ('info' | 'warning' | 'error',
// default 'warning') is read directly by hive-warn.css's
// `:host([level="…"])` selectors — a fixed three-tier semantic ladder,
// not an open severity+modifier combination (mara, on review: "there
// should be distinction between info, warning, error — all warnings
// should be styled identically"). Unlike `<hive-btn>`'s
// `variant`/`disabled` there's no inner native element that needs the
// attribute mirrored onto it, so no `attributeChangedCallback` is
// needed at all — the CSS reads the host attribute directly.
//
// Content is arbitrary light-DOM children through the shadow tree's
// single default `<slot>` — same reuse of the existing `<strong>`/
// `<code>` markup every call site already writes, no caller-side
// rewrite of their message content needed.
//
// Usage:
//   `<hive-warn level="warning">...</hive-warn>`     (static HTML)
//   `el('hive-warn', { level: 'warning' }, ...)`      (JS-built)
//   `el('hive-warn', { level: 'error' }, ...)`         (active incident, pulses)

import { attachShadowCss } from '../shadow-css.js';
import hiveWarnCss from './hive-warn.css';

class HiveWarn extends HTMLElement {
  connectedCallback() {
    if (this._built) return; // re-parenting re-fires connectedCallback
    const root = attachShadowCss(this, hiveWarnCss);
    root.append(document.createElement('slot'));
    this._built = true;
  }
}
customElements.define('hive-warn', HiveWarn);