import {
  makeWorld, sim, tick, aimAt, check, section, report,
  CFG, Radicals, Input, ROOMS,
} from './harness.mjs';

// ============================================================
// THE GO/NO-GO: does one radical eat a field?
// ============================================================
section('THE RADICAL — outbreak dynamics');
{
  const w = makeWorld();
  w.load(ROOMS[1]);
  w.particles.length = 0;
  // a dense-ish field, deterministic layout (no Math.random in the test)
  let i = 0;
  for (let gx = 0; gx < 16; gx++)
    for (let gy = 0; gy < 9; gy++)
      w.spawn({ x: 240 + gx * 42, y: 110 + gy * 46, el: ['H', 'C', 'O', 'N'][i++ % 4] });
  w.molly.x = 80; w.molly.y = 660;

  Radicals.make(w.particles[0]);
  tick(w);
  const t0 = w.radicals.count;

  const trace = [];
  for (let s = 0; s < 6; s++) {
    sim(w, 1);
    trace.push(`t=${s + 1}s n=${w.radicals.count} hops=${w.radicals.chain}`);
  }
  console.log('    ' + trace.join('  |  '));

  check('starts with exactly one radical', t0 === 1, `n=${t0}`);
  check('the wound MOVES (chain hops)', w.radicals.chain > 5, `hops=${w.radicals.chain}`);
  check('branch factor crosses 1 in a dense field', w.radicals.peak > 1, `peak=${w.radicals.peak}`);
  check('respects the population cap', w.radicals.peak <= CFG.RAD_CAP, `peak=${w.radicals.peak}`);
}

// ============================================================
// TERMINATION — the wrestle is the kill move
// ============================================================
section('TERMINATION — two radicals annihilate');
{
  const w = makeWorld();
  w.load(ROOMS[1]);
  w.particles.length = 0;
  const a = w.spawn({ x: 620, y: 322, el: 'C' });
  const b = w.spawn({ x: 620, y: 398, el: 'C' });
  Radicals.make(a); Radicals.make(b);
  w.molly.x = 620; w.molly.y = 520;      // stand clear; the squeeze point is lethal
  aimAt(w, 620, 360);
  Input.grab = true;

  let killT = null;
  for (let i = 0; i < 600; i++) {
    tick(w);
    if (!a.radical && !b.radical) { killT = i / 120; break; }
  }
  Input.grab = false;

  check('two radicals can be terminated', killT !== null, killT ? `in ${killT.toFixed(2)}s` : 'NEVER');
  check('termination is FAST enough to be a combat move',
        killT !== null && killT < 0.9, `${killT ? killT.toFixed(2) : '-'}s (target ~0.4, must be < 0.9)`);
  check('they annihilate rather than bond', !a.isBondedTo(b));
}

// ============================================================
// the barrier multiplier must actually be doing the work
// ============================================================
section('BARRIER — radical pairs are barrierless');
{
  const { barrierHump } = await import('../src/physics.js');
  const A = { r: 11, radical: false }, B = { r: 11, radical: false };
  const lock = (A.r + B.r) * CFG.LOCK_MUL;
  const d = lock + CFG.BARRIER_BAND / 2;   // peak of the hump
  const normal = barrierHump(d, A, B);
  const rad = barrierHump(d, { r: 11, radical: true }, { r: 11, radical: true });
  check('normal pair hits the full barrier', normal > 0.9, `hump=${normal.toFixed(2)}`);
  check('radical pair is ~85% easier', rad < normal * 0.2, `hump=${rad.toFixed(2)}`);
}

// ============================================================
// MOLLY'S LIFE
// ============================================================
section('MOLLY — she can die');
{
  const w = makeWorld();
  w.load(ROOMS[1]);
  w.particles.length = 0;
  const r = w.spawn({ x: 400, y: 360, el: 'C' });
  r.fixed = true;
  Radicals.make(r);
  w.molly.x = 400; w.molly.y = 360;

  check('starts with 3 electrons', w.molly.electrons === 3, `e=${w.molly.electrons}`);
  tick(w);
  check('radical contact costs an electron', w.molly.electrons === 2, `e=${w.molly.electrons}`);
  check('i-frames engage', w.molly.iframe > 0, `iframe=${w.molly.iframe.toFixed(2)}`);

  // i-frames should prevent instant death
  for (let i = 0; i < 30; i++) tick(w);
  check('i-frames prevent melt-through', w.molly.electrons === 2, `e=${w.molly.electrons}`);

  // now run it out — hold her in contact (knockback would otherwise save her)
  let deathT = null;
  for (let i = 0; i < 1200 && deathT === null; i++) {
    w.molly.x = 400; w.molly.y = 360; w.molly.vx = w.molly.vy = 0;
    tick(w);
    if (w.molly.dead) deathT = i / 120;
  }
  check('she dies when electrons run out', w.molly.dead, deathT ? `at ${deathT.toFixed(2)}s` : 'survived');
  check('death takes long enough to read', deathT === null || deathT > 1.5, `${deathT ? deathT.toFixed(2) : '-'}s`);
}

// ============================================================
// REGRESSION — everything that worked before still works
// ============================================================
section('REGRESSION');
{
  let ok = 0;
  for (let i = 0; i < ROOMS.length; i++) {
    const w = makeWorld();
    try { w.load(ROOMS[i]); sim(w, 2); ok++; }
    catch (e) { console.log(`    room ${i} threw: ${e.message}`); }
  }
  check('all rooms load + simulate', ok === ROOMS.length, `${ok}/${ROOMS.length}`);

  // the wrestle
  const w = makeWorld();
  w.load(ROOMS[2]);
  const a = w.particles[0], b = w.particles[1];
  a.x = 620; a.y = 322; a.vx = a.vy = 0;
  b.x = 620; b.y = 398; b.vx = b.vy = 0;
  w.molly.x = 620; w.molly.y = 360;
  aimAt(w, 620, 360);
  Input.grab = true;
  let t = null;
  for (let i = 0; i < 600; i++) { tick(w); if (a.isBondedTo(b)) { t = i / 120; break; } }
  Input.grab = false;
  check('bond wrestle still snaps', t !== null, t ? `${t.toFixed(2)}s` : 'FAILED');
  check('wrestle stayed in its feel window', t !== null && t > 1.0 && t < 2.6, `${t ? t.toFixed(2) : '-'}s`);
  check('room 2 exit opens', w.exitOpen);

  // the heist
  const h = makeWorld();
  h.load(ROOMS[5]);
  const k = h.find('key');
  k.setCharge(0); k.grace = 0; k.zoneTimer = 0;
  k.x = 660; k.y = 360; k.vx = 260;
  let locked = null;
  for (let i = 0; i < 900 && locked === null; i++) { tick(h); if (h.exitOpen) locked = i / 120; }
  check('heist still solvable', locked !== null, locked ? `${locked.toFixed(2)}s` : 'FAILED');

  // laserhands
  const g = makeWorld();
  g.load(ROOMS[1]);
  g.particles.length = 0;
  const target = g.spawn({ x: 900, y: 360, el: 'H' });
  target.fixed = true;
  g.molly.x = 200; g.molly.y = 360; g.molly.cool = 0;
  aimAt(g, 900, 360);
  g.bolts.fire(g, 1);
  let hit = null;
  for (let i = 0; i < 300 && hit === null; i++) { tick(g); if (target.charge === 1) hit = i / 120; }
  check('bolt travels and lands on hydrogen', hit !== null, hit ? `${hit.toFixed(2)}s over 700px` : 'MISSED');
  check('bolt is not hitscan', hit !== null && hit > 0.3, `${hit ? hit.toFixed(2) : '-'}s`);
}

process.exit(report() ? 0 : 1);