/**
 * rigging.selftest.js — assert suite for the prep-phase economy.  [Lane B]
 *
 * Same shape as sail.selftest.js: exports RIGGING_TESTS as [name, fn] pairs so
 * one set of asserts runs under both Lane A's selftest.html (via
 * js/tests/b.test.js) and node.
 */

import { RiggingSession } from './rigging.js';
import { SailRig, TENSION_MIN, TENSION_MAX } from './sail.js';
import { HARDWARE, START_BUDGET, SPARE_COST } from './contracts.js';

const [CARABINER, SHACKLE, RATED] = HARDWARE;

/** Lane A's real yard (THREADS: "yard layout is now FACT"), trimmed to what the economy needs. */
export const ANCHORS = [
  { id: 'h1', type: 'house', pos: { x: -5, y: 2.6, z: -9.9 } },
  { id: 'h2', type: 'house', pos: { x: 0, y: 2.6, z: -9.9 } },
  { id: 'h3', type: 'house', pos: { x: 5, y: 2.6, z: -9.9 } },
  { id: 't1', type: 'tree', pos: { x: -9, y: 3.2, z: 2 } },
  { id: 't2', type: 'tree', pos: { x: 8, y: 3.1, z: -2 } },
  { id: 'p1', type: 'post', pos: { x: -6.4, y: 3.9, z: 7.4 } },
  { id: 'p2', type: 'post', pos: { x: 5.3, y: 3.9, z: 8 } },
].map((a) => ({ ...a, sway: () => a.pos }));

const session = () => new RiggingSession({ anchors: ANCHORS });

const TESTS = [];
const test = (name, fn) => TESTS.push([name, fn]);
const assert = (cond, msg) => { if (!cond) throw new Error(msg); };

test('rigging four corners charges the cheapest hardware each', () => {
  const s = session();
  for (const id of ['h1', 'h3', 'p1', 'p2']) assert(s.rig(id).ok, `rig ${id} failed`);
  assert(s.budget === START_BUDGET - 4 * CARABINER.cost, `budget $${s.budget}`);
  assert(s.canStart, 'four corners should be startable');
  return `$${START_BUDGET} -> $${s.budget} after four carabiners`;
});

test('a sail has four corners, not five', () => {
  const s = session();
  for (const id of ['h1', 'h3', 'p1', 'p2']) s.rig(id);
  const r = s.rig('t1');
  assert(!r.ok && r.reason === 'a sail has four corners', `fifth corner allowed: ${JSON.stringify(r)}`);
  assert(s.budget === START_BUDGET - 4 * CARABINER.cost, 'refused corner should not be charged');
  return 'fifth pick refused and not charged';
});

test('hardware cycles up, charging only the difference', () => {
  const s = session();
  s.rig('h1');
  assert(s.cycleHardware('h1').ok, 'cycle to shackle failed');
  assert(s.pickOf('h1').hw === SHACKLE, 'expected shackle');
  assert(s.budget === START_BUDGET - SHACKLE.cost, `budget $${s.budget} should be $${START_BUDGET - SHACKLE.cost}`);
  s.cycleHardware('h1');
  assert(s.pickOf('h1').hw === RATED, 'expected rated shackle');
  assert(s.budget === START_BUDGET - RATED.cost, `budget $${s.budget}`);
  return `carabiner -> shackle -> rated, paid $${RATED.cost} total`;
});

test('cycling past the top tier wraps and refunds', () => {
  const s = session();
  s.rig('h1');
  s.cycleHardware('h1'); s.cycleHardware('h1'); // -> rated
  s.cycleHardware('h1');                        // -> wraps to carabiner
  assert(s.pickOf('h1').hw === CARABINER, 'expected wrap back to carabiner');
  assert(s.budget === START_BUDGET - CARABINER.cost, `budget $${s.budget} — wrap should refund the difference`);
  return `wrapped and refunded back to $${s.budget}`;
});

test('unrig refunds exactly what the corner cost', () => {
  const s = session();
  s.rig('h1');
  s.cycleHardware('h1'); s.cycleHardware('h1'); // rated, $30
  assert(s.unrig('h1').ok, 'unrig failed');
  assert(s.budget === START_BUDGET, `budget $${s.budget} should be back to $${START_BUDGET}`);
  assert(!s.isRigged('h1'), 'h1 should be free again');
  return 'full refund, no leak';
});

test('spares cost real money and refund', () => {
  const s = session();
  assert(s.setSpares(1).ok, 'buying a spare failed');
  assert(s.budget === START_BUDGET - SPARE_COST, `budget $${s.budget}`);
  s.setSpares(0);
  assert(s.budget === START_BUDGET && s.spares === 0, 'selling the spare back should restore budget');
  return `spare costs $${SPARE_COST}, refunds clean`;
});

test('budget is a real wall', () => {
  const s = session();
  for (const id of ['h1', 'h3', 'p1', 'p2']) s.rig(id);   // $20, $60 left
  s.cycleHardware('h1'); s.cycleHardware('h1');           // -> rated, $25 more, $35 left
  s.cycleHardware('h3'); s.cycleHardware('h3');           // -> rated, $25 more, $10 left
  s.cycleHardware('p1');                                  // -> shackle, $10, $0 left
  const broke = s.cycleHardware('p2');
  assert(!broke.ok && broke.reason === 'not enough budget', `overspend allowed: ${JSON.stringify(broke)}`);
  assert(s.budget === 0, `budget $${s.budget}`);
  assert(s.pickOf('p2').hw === CARABINER, 'refused upgrade should not have applied');
  return 'refused the upgrade that would have gone negative';
});

// DESIGN.md: "good hardware everywhere is unaffordable. You *will* field one
// dodgy corner — the game is choosing which one." If this ever passes, the
// central economic tension of the game is gone and the budget is decoration.
// contracts.js's HARDWARE comment names this as the shape retuning had to keep.
test('you cannot afford good hardware on all four corners', () => {
  const s = session();
  for (const id of ['h1', 'h3', 'p1', 'p2']) s.rig(id);
  let upgraded = 0;
  for (const id of ['h1', 'h3', 'p1', 'p2']) if (s.setHardware(id, RATED).ok) upgraded++;
  assert(upgraded < 4, `all four corners got rated shackles with $${START_BUDGET} — no compromise left to make`);
  assert(upgraded >= 2, `only ${upgraded} rated corners affordable — budget may be too tight to be interesting`);
  return `$${START_BUDGET} buys ${upgraded}/4 rated corners, then you are choosing your weak link`;
});

test('picks come back ring-ordered however you click them', () => {
  const s = session();
  // deliberately crossing order: two diagonals first
  for (const id of ['h1', 'p2', 'h3', 'p1']) s.rig(id);
  const ids = s.picks.map((p) => p.anchorId);
  // a valid ring puts h1 opposite p2 (they are diagonal across the yard)
  const opposite = ids[(ids.indexOf('h1') + 2) % 4];
  assert(opposite === 'p2', `h1 should sit opposite p2 in the ring, got ${ids.join(',')}`);
  return `clicked h1,p2,h3,p1 -> ring ${ids.join(' -> ')}`;
});

test('tension clamps to the rigging range', () => {
  const s = session();
  assert(s.setTension(99) === TENSION_MAX, 'over-tight should clamp');
  assert(s.setTension(0) === TENSION_MIN, 'over-loose should clamp');
  s.setTension(1.15);
  assert(s.tension === 1.15, 'in-range tension should pass through');
  return `clamped to ${TENSION_MIN}..${TENSION_MAX}`;
});

test('commit hands a working rig to the sim', () => {
  const s = session();
  for (const id of ['h1', 'h3', 'p1', 'p2']) s.rig(id);
  s.setHardware('h1', RATED);
  s.setTension(1.1);
  const rig = s.commit(new SailRig({ anchors: ANCHORS }));
  assert(rig.rigged, 'rig should be rigged');
  assert(rig.corners.length === 4, 'rig should have four corners');
  assert(rig.tension === 1.1, `rig tension ${rig.tension}`);
  assert(rig.corners.find((c) => c.anchorId === 'h1').hw === RATED, 'h1 should have carried its rated shackle into the sim');
  const wind = { sample: () => ({ x: 0, y: 0, z: 12 }) };
  for (let i = 0; i < 240; i++) rig.step(1 / 60, wind, i / 60);
  assert(rig.corners.every((c) => Number.isFinite(c.load)), 'committed rig went NaN');
  return `committed and stepped 4 s clean over the real yard, max load ${(rig.maxLoad() / 1000).toFixed(2)} kN`;
});

test('commit refuses an unfinished rig', () => {
  const s = session();
  s.rig('h1'); s.rig('h3');
  let threw = false;
  try { s.commit(new SailRig({ anchors: ANCHORS })); } catch { threw = true; }
  assert(threw, 'committing two corners should throw');
  return 'two corners refused';
});

test('summary names the weak link for the HUD', () => {
  const s = session();
  for (const id of ['h1', 'h3', 'p1', 'p2']) s.rig(id);
  s.setHardware('h1', RATED); s.setHardware('h3', SHACKLE); s.setHardware('p1', SHACKLE);
  const sum = s.summary;
  assert(sum.weakest === 'p2', `weakest should be the lone carabiner p2, got ${sum.weakest}`);
  assert(sum.corners.length === 4, 'summary should list four corners');
  return `weak link flagged: ${sum.weakest}, $${sum.budget} left`;
});

test('reset() returns a used session to a fresh prep phase', () => {
  const s = session();
  for (const id of ['h1', 'h3', 'p1', 'p2']) s.rig(id);
  s.setHardware('h1', RATED); s.setTension(1.2); s.setSpares(1);
  assert(s.budget < START_BUDGET, 'setup should have spent money');
  s.reset();
  assert(s.budget === START_BUDGET, `budget not restored: $${s.budget}`);
  assert(s.picks.length === 0, 'picks not cleared');
  assert(s.tension === 1.0 && s.spares === 0, 'tension/spares not reset');
  // and it's actually usable again, not just zeroed
  assert(s.rig('t1').ok && s.canStart === false, 'session not rig-able after reset');
  return 'budget, picks, tension, spares all fresh; rig-able again';
});

export const RIGGING_TESTS = TESTS;

export function runRiggingSelftest() {
  const results = TESTS.map(([name, fn]) => {
    try { return { name, pass: true, detail: fn() || '' }; }
    catch (e) { return { name, pass: false, detail: e.message }; }
  });
  return { pass: results.every((r) => r.pass), results };
}

function report(out) {
  const lines = out.results.map(
    (r) => `${r.pass ? 'PASS' : 'FAIL'}  ${r.name}${r.detail ? `\n        ${r.detail}` : ''}`
  );
  return `${lines.join('\n')}\n\n${out.pass ? 'ALL GREEN' : 'FAILURES'} — ${out.results.filter((r) => r.pass).length}/${out.results.length}`;
}

if (typeof process !== 'undefined' && process.versions?.node && import.meta.filename === process.argv[1]) {
  const out = runRiggingSelftest();
  console.log(report(out));
  process.exit(out.pass ? 0 : 1);
}

export { report };
