import { NeutralShip } from './NeutralShip.js';

/**
 * The ESCORT CONTRACT's transport (data/combat.json → transport — the
 * neutral freighter from assets/images/ships-transport.png): a PERSISTENT
 * player-side craft the player rendevouses with at a local waypoint and
 * leads through the jump gates to a planet / space station (js/scenes/
 * GameScene.js → the escort's updateEscort).
 *
 * It rides the NeutralShip's escort/engage AI verbatim (hold the ring
 * around the player, fight the NEAREST pirate up with its own volley,
 * never aim at the player — js/combat/NeutralShip.js) with ONE difference
 * that makes it a convoy member instead of a passing escort: the break-off
 * window is lapsed (escortMs = Infinity), so it never peels off. It stays
 * for the life of the contract — the contract's reset (GameScene's
 * landing hook) is what ends it, not the escort clock.
 *
 * PLAYER-SAFE BY CONSTRUCTION (inherited): the target pool is the enemy
 * roster, the collide passes never route an 'ally' bolt into the player,
 * and the player's auto-fire never targets this roster.
 *
 * THE PERSISTENT FLAG (`persistent = true`) is the seam the CombatSystem
 * reads (its `active` + `_neutralOnly` gates skip a persistent ally): a
 * standing convoy must NOT hold the jump gate open or keep the
 * encounter's "active" flag up — the fight is over the moment the last
 * pirate is down, even with the convoy still flying.
 *
 * ART + SCALE: the transport sheet is 180×320 with the art facing north
 * (the LONG side is the ship's length). EnemyShip's scale rule assumes a
 * square sheet (scale = size / frameWidth) — wrong for a portrait
 * freighter. So `size` (data → transport.size, 135) reads as the hull's
 * WORLD LENGTH: ~2.5× a fighter's 54. We re-scale by the sheet's long
 * side (320) and re-anchor the hit circle to the new scale.
 */
export class TransportShip extends NeutralShip {
  /**
   * @param {object} scene the combat scene
   * @param {number} x spawn
   * @param {number} y spawn
   * @param {number} index slot (orbit direction alternates)
   * @param {object} [c] the transport's FULL config (data → transport)
   * @param {object} [o] NeutralShip's options (escortMs is lapsed below)
   */
  constructor(scene, x, y, index, c = null, o = {}) {
    // The break-off window is lapsed (Infinity) — a convoy member stays.
    super(scene, x, y, index, c, { ...o, escortMs: Number.POSITIVE_INFINITY });
    this.persistent = true; // CombatSystem's active/neutralOnly gates skip this
    this.isTransport = true;

    // Portrait-sheet re-scale (see the class doc): size = world length.
    const fw = Number(c?.frameWidth) || 128;
    const fh = Number(c?.frameHeight) || 128;
    const longSide = Math.max(fw, fh);
    const size = Number(this.size) || 54;
    const s = size / longSide;
    this.setScale(s);
    const body = this.body;
    if (body && typeof body.setCircle === 'function') body.setCircle(this.hitRadius / s);
  }
}