<?php

declare(strict_types=1);

namespace App\Service;

use Symfony\Component\Process\Process;

final class DockerService
{
    /**
     * @return array{status: string, image: string, version: string, startedAt: string}
     */
    public function getContainerStatus(string $containerName): array
    {
        $process = new Process([
            'docker', 'inspect',
            '--format', '{{.State.Status}}||{{.Config.Image}}||{{.State.StartedAt}}',
            $containerName,
        ]);
        $process->setTimeout(10);
        $process->run();

        if (!$process->isSuccessful()) {
            return [
                'status' => 'not_found',
                'image' => '',
                'version' => '',
                'startedAt' => '',
            ];
        }

        $parts = explode('||', trim($process->getOutput()));

        if (\count($parts) < 3) {
            return [
                'status' => 'not_found',
                'image' => '',
                'version' => '',
                'startedAt' => '',
            ];
        }

        $image = $parts[1];
        $version = 'latest';
        if (str_contains($image, ':')) {
            $version = substr($image, strrpos($image, ':') + 1);
        }

        return [
            'status' => $parts[0],
            'image' => $image,
            'version' => $version,
            'startedAt' => $parts[2],
        ];
    }

    /**
     * @return array{cpuPercent: float, memoryUsage: string, memoryLimit: string, memoryPercent: float}
     */
    public function getContainerStats(string $containerName): array
    {
        $process = new Process([
            'docker', 'stats', '--no-stream',
            '--format', '{{.CPUPerc}}||{{.MemUsage}}||{{.MemPerc}}',
            $containerName,
        ]);
        $process->setTimeout(10);
        $process->run();

        if (!$process->isSuccessful()) {
            return [
                'cpuPercent' => 0.0,
                'memoryUsage' => '',
                'memoryLimit' => '',
                'memoryPercent' => 0.0,
            ];
        }

        $parts = explode('||', trim($process->getOutput()));

        if (\count($parts) < 3) {
            return [
                'cpuPercent' => 0.0,
                'memoryUsage' => '',
                'memoryLimit' => '',
                'memoryPercent' => 0.0,
            ];
        }

        $memParts = explode(' / ', $parts[1]);

        return [
            'cpuPercent' => (float) rtrim($parts[0], '%'),
            'memoryUsage' => $memParts[0] ?? '',
            'memoryLimit' => $memParts[1] ?? '',
            'memoryPercent' => (float) rtrim($parts[2], '%'),
        ];
    }
}