<?phpnamespace App\Sim;/** Plays a level's 'solution' on its World: the title demo, the smoke test, the proof that a level can be won. */final class Autoplay{ private int $next = 0; public function __construct(private World $world, private array $steps) { } public function done(): bool { return $this->next >= count($this->steps); } /** Call once per tick, after World::step(). */ public function step(): void { if ($this->done()) { return; } $s = $this->steps[$this->next]; [$skill, $who, $x, $dir] = $s; $leader = null; foreach ($this->world->lumis as $l) { if ($l->alive && !$l->is(Lumi::STOP) && ($leader === null || $l->x > $leader->x)) { $leader = $l; } } if (isset($s[5])) { $ref = $s[4] === -5 ? $leader : ($this->world->lumis[$s[4]] ?? null); if ($this->world->saved === 0 && ($ref === null || ($ref->alive && $ref->x < $s[5]))) { return; } } foreach ($this->world->lumis as $l) { if (!$l->alive) { continue; } $match = match (true) { $who >= 0 => $l->id === $who, $who === -1 => $l !== $leader && $l->state === Lumi::WALK, $who === -5 => $l === $leader, $who === -2 => $l->state === Lumi::STOP, default => $l->state === Lumi::WALK, }; if (!$match || ($dir !== 0 && $l->dir !== $dir)) { continue; } if ($x > 0 && ($l->dir > 0 ? $l->x < $x : $l->x > $x)) { continue; } if ($x > 0 && $who < 0 && $who !== -5 && abs($l->x - $x) > 3) { continue; } if ($this->world->assign($l, $skill)) { $this->next++; return; } } }}