<?php

namespace App\Sim;

/**
 * One Lumikin: a small lantern creature that walks straight ahead until told otherwise.
 * (x, y): x is the centre column, y the row of the ground pixel under its feet (the body is the rows above).
 */
final class Lumi
{
    public const WALK = 'walk';
    public const FALL = 'fall';
    public const GLIDE = 'glide';
    public const CLIMB = 'climb';
    public const STOP = 'stop';
    public const BRIDGE = 'bridge';
    public const BASH = 'bash';
    public const MINE = 'mine';
    public const DIG = 'dig';
    public const LEAVE = 'leave';

    public string $state = self::FALL;
    /** ticks in the current state (animation, work rhythm) */
    public int $frame = 0;
    /** pixels fallen since the fall began */
    public int $fall = 0;
    public bool $climber = false;
    public bool $glider = false;
    /** ticks before it bursts, -1: no fuse */
    public int $fuse = -1;
    public int $bricks = 0;
    public int $work = 0;
    public bool $alive = true;

    public function __construct(public readonly int $id, public int $x, public int $y, public int $dir = 1)
    {
    }

    public function is(string ...$states): bool
    {
        return in_array($this->state, $states, true);
    }

    public function set(string $state): void
    {
        $this->state = $state;
        $this->frame = 0;
        $this->work = 0;
    }
}