import { config } from '../config/Config.js';
import { ensureUiCameras, assignWorld, assignUi } from '../visuals/UiCameras.js';

export { ensureUiCameras, assignWorld, assignUi };

/**
 * The combat CAMERA KICK — a subtle world-camera shake on the big beats:
 * you taking a hit, a hostile going down, the shield collapse.
 *
 * It fires on the WORLD camera only. The UI pass (js/visuals/UiCameras.js
 * → `fx-ui`) renders the bar, feed, and gauge flashes on its own fixed
 * pass, so the HUD stays perfectly still while the world kicks — that's
 * the whole point of the split. Call `ensureUiCameras(scene)` at scene
 * setup (both combat contexts do) so the split exists when the shake
 * lands; without a split (a scene without cameras, the headless tests)
 * this is a guarded no-op.
 *
 * Tuning: data/combat.json → combat.fx.shake — `hit` / `kill` / `break`
 * are the Phaser shake intensities (a small FRACTION of the viewport,
 * the same idiom as the tether contact's 0.003–0.007 in GameScene), and
 * `ms` is the duration.
 */

/**
 * @param {object} scene the combat scene
 * @param {string} kind 'hit' | 'kill' | 'break' — the fx.shake.* intensity
 *   to use (the beat's weight: a player hit < an enemy kill < the
 *   shield-collapse)
 */
export function combatShake(scene, kind = 'hit') {
  const cam = scene?.cameras?.main;
  if (!cam || typeof cam.shake !== 'function') return;
  const fallback = { hit: 0.0045, kill: 0.007, break: 0.011 }[kind] ?? 0.005;
  const intensity = Number(config.get(`combat.fx.shake.${kind}`, fallback));
  if (!Number.isFinite(intensity) || intensity <= 0) return;
  const ms = Math.max(60, Number(config.get('combat.fx.shake.ms', 230)) || 230);
  // The UI split (once) so the kick hits the WORLD pass only — the bar,
  // feed, and gauge flashes render on the untouched `fx-ui` pass and stay
  // perfectly still. (Idempotent; null-safe for camera-less scenes.)
  ensureUiCameras(scene);
  cam.shake(ms, intensity);
}