Stratadox\Pathfinder\Estimate\Estimate

Complexity

Total Complexity

4

Size/Duplication

Total Lines	31
Duplicated Lines	0 %

Importance

Changes	1
Bugs	0	Features	0

4 Methods

Rating	Name	Duplication	Size	Complexity
A	environment()	0	3	1
A	__construct()	0	6	1
A	costAs()	0	5	1
A	estimate()	0	5	1

<?php declare(strict_types=1);

namespace Stratadox\Pathfinder\Estimate;

use Stratadox\Pathfinder\Environment;
use Stratadox\Pathfinder\Heuristic;
use Stratadox\Pathfinder\Metric;

final class Estimate implements Heuristic
{
    private $environment;
    private $metric;

    private function __construct(
        Metric $metric,
        Environment $environment
    ) {
        $this->metric = $metric;
        $this->environment = $environment;
    }

    public static function costAs(
        Metric $metric,
        Environment $environment
    ): Heuristic {
        return new static($metric, $environment);
    }

    public function estimate(string $start, string $goal): float
    {
        return $this->metric->distanceBetween(
            $this->environment->positionOf($start),
            $this->environment->positionOf($goal)
        );
    }

    public function environment(): Environment
    {
        return $this->environment;
    }
}