<?php
declare(strict_types=1);

namespace MailAccountAdmin;

class VersionHelper
{
    private string $version;

    public function __construct()
    {
        $version = $this->loadFromVersionFile();
        if (!empty($version)) {
            $this->version = $version;
        } elseif ($this->inDevelopmentMode()) {
            $this->version = '[dev version]';
        } else {
            $this->version = '[undefined version]';
        }
    }

    public function getAppVersion(): string
    {
        return $this->version;
    }

    private function loadFromVersionFile(): ?string
    {
        $versionFilePath = __DIR__ . '/../VERSION';

        if (file_exists($versionFilePath)) {
            $fileContent = file($versionFilePath);
            return $fileContent[0] ?? null;
        }
        return null;
    }

    private function inDevelopmentMode(): bool
    {
        return getenv('APP_ENV') === 'development';
    }
}