/* ============================================================
 * debug_physics_balls_preview_match.js · 物理弹球 · 预览=实际轨迹验证
 * 清空砖块后以固定角度发射，对比 simulatePath 预览点与真实球位置：
 * 瞄准折线必须与球实际运动线路一致（误差 < 2px）。
 * 运行：node dev_test_scripts/debug/debug_physics_balls_preview_match.js
 * ============================================================ */
'use strict';
const fs = require('fs');
const path = require('path');
const vm = require('vm');

const LAB = path.join(__dirname, '..', '..', 'public', 'tools', 'thought_lab', 'labs', 'physics_balls');
const ctx = {
  Math,
  console,
  PBAudio: { fire() {}, hit() {}, wall() {}, item() {}, breakBlock() {}, over() {}, claim() {} },
  PBStorage: { getEscape() { return 50; } }
};
vm.createContext(ctx);
for (const f of ['pb_physics.js', 'pb_rules.js', 'pb_game.js', 'pb_render.js']) {
  vm.runInContext(fs.readFileSync(path.join(LAB, f), 'utf8'), ctx, { filename: f });
}

const G = ctx.PBGame, RD = ctx.PBRender;

let ok = true;
for (const ang of [0, 0.35, -0.6, 1.0]) {
  const g = G.create();
  G.startGame(g);
  g.blocks = []; g.items = [];          // 清空砖块，保证对比确定
  g.aimAngle = ang;

  const pts = RD.simulatePath(g);       // 预览点：pts[k] 对应 t = k/60 s（subDt=1/240，每 4 子步采样）

  G.fire(g);
  let maxErr = 0, checked = 0;
  for (let f = 1; f <= 30; f++) {       // 前 0.5s，每帧 4 子步与预览采样对齐
    G.update(g, 1 / 60);
    if (!g.balls.length) break;
    if (f % 2) continue;
    if (f >= pts.length) break;
    const b = g.balls[0];
    const err = Math.hypot(b.x - pts[f].x, b.y - pts[f].y);
    maxErr = Math.max(maxErr, err);
    checked++;
  }
  const pass = checked >= 10 && maxErr < 2;
  console.log((pass ? 'PASS ' : 'FAIL ') + 'angle=' + ang + ' checked=' + checked + ' maxErr=' + maxErr.toFixed(2) + 'px');
  ok = pass && ok;
}

process.exit(ok ? 0 : 1);