// Blowing aims within the nozzle's reach, with room for the brush and settling.
const { load, suite, flatWorld, ticks, count } = require('./harness');
const { run } = load();
const { check, done } = suite();

function blowSand(distance, radius) {
  flatWorld(run, 640, 160, 100);
  run('RS = 12345; bot.x = 300 - bot.w / 2; bot.y = 80 - bot.h / 2; bag[SAND] = 40; bagTotal = 40;');
  run(`for (let k = 0; k < 40 && bag[SAND]; k++) { toolBlow(300 + ${distance}, 99, ${radius}, SAND); simTick(); }`);
  ticks(run, 400);
  check('all blown sand lands and stays out of the bag', count(run, run('SAND')) === 40 && run('flyers.length === 0 && bag[SAND] === 0'));
  return run(`(() => {
    let farthest = 0, cursorDistance = 0;
    for (let i = 0; i < N; i++) if (mat[i] === SAND) {
      const x = i % W + 0.5, y = Math.floor(i / W) + 0.5;
      farthest = Math.max(farthest, Math.hypot(x - 300, y - 80));
      cursorDistance = Math.max(cursorDistance, Math.hypot(x - (300 + ${distance} + 0.5), y - 99.5));
    }
    return { farthest, cursorDistance };
  })()`);
}

// Widest brush, 40 grains on flat ground: measured 14.95 grains past REACH.
const BRUSH_AND_SETTLING_MARGIN = 16;
for (const distance of [run('3 * REACH'), run('5 * REACH')]) {
  const landing = blowSand(distance, 6);
  check('aiming far away lands sand within reach plus brush and settling', landing.farthest <= run('REACH') + BRUSH_AND_SETTLING_MARGIN, landing.farthest.toFixed(2));
}
const nearby = blowSand(30, 0);
check('aiming inside reach still lands sand around the cursor', nearby.cursorDistance <= BRUSH_AND_SETTLING_MARGIN, nearby.cursorDistance.toFixed(2));

done();