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<?php

/*
 * This file is part of the Fidry CPUCounter Config package.
 *
 * (c) Théo FIDRY <[email protected]>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

declare(strict_types=1);

namespace Fidry\CpuCoreCounter;

use Fidry\CpuCoreCounter\Finder\CpuCoreFinder;
use function array_map;
use function explode;
use function implode;
use function max;
use function str_repeat;
use const PHP_EOL;

/**
 * Utility to debug.
 *
 * @private
 */
final class Diagnoser
{
    /**
     * Provides an aggregated diagnosis based on each finders diagnosis.
     *
     * @param list<CpuCoreFinder> $finders
     */
    public static function diagnose(array $finders): string
    {
        $diagnoses = array_map(
            static function (CpuCoreFinder $finder): string {
                return self::diagnoseFinder($finder);
            },
            $finders
        );

        return implode(PHP_EOL, $diagnoses);
    }

    /**
     * Executes each finders.
     *
     * @param list<CpuCoreFinder> $finders
     */
    public static function execute(array $finders): string
    {
        $diagnoses = array_map(
            static function (CpuCoreFinder $finder): string {
                $coresCount = $finder->find();

                return implode(
                    '',
                    [
                        $finder->toString(),
                        ': ',
                        null === $coresCount ? 'NULL' : $coresCount,
                    ]
                );
            },
            $finders
        );

        return implode(PHP_EOL, $diagnoses);
    }

    private static function diagnoseFinder(CpuCoreFinder $finder): string
    {
        $diagnosis = $finder->diagnose();

        $maxLineLength = max(
            array_map(
                'strlen',
                explode(PHP_EOL, $diagnosis)
            )
        );

        $separator = str_repeat('-', $maxLineLength);

        return implode(
            '',
            [
                $finder->toString().':'.PHP_EOL,
                $separator.PHP_EOL,
                $diagnosis.PHP_EOL,
                $separator.PHP_EOL,
            ]
        );
    }

    private function __construct()
    {
    }
}