import Phaser from 'phaser';
import { GFORCE } from '../config.js';
import Kid from '../entities/Kid.js';

export default class KidManager {
  constructor(scene, bus, kidsAboard) {
    this.scene = scene;
    this.bus = bus;
    this.total = kidsAboard;
    this.kids = [];
    this._lastEjectTime = -Infinity;

    for (let i = 0; i < kidsAboard; i++) {
      this.kids.push(new Kid(scene, bus, i));
    }

    this._onGForceExceeded = this._onGForceExceeded.bind(this);
    scene.events.on('gforce-exceeded', this._onGForceExceeded);
  }

  get kidsAboardCount() {
    return this.kids.filter((kid) => kid.state === 'aboard').length;
  }

  _onGForceExceeded({ gForce }) {
    const now = this.scene.time.now;
    if (now - this._lastEjectTime < GFORCE.ejectCooldownMs) return;

    const aboard = this.kids.filter((kid) => kid.state === 'aboard');
    if (aboard.length === 0) return;

    this._lastEjectTime = now;
    const kid = Phaser.Utils.Array.GetRandom(aboard);
    kid.eject(this.bus.chassis.body.velocity, gForce);

    this.scene.events.emit('kid-ejected', {
      kidsAboard: this.kidsAboardCount,
      total: this.total,
    });

    if (this.kidsAboardCount === 0) {
      this.scene.events.emit('level-failed', { reason: 'all-kids-lost' });
    }
  }

  update(time) {
    for (const kid of this.kids) kid.update(time);
  }

  destroy() {
    this.scene.events.off('gforce-exceeded', this._onGForceExceeded);
    for (const kid of this.kids) kid.destroy();
  }
}