<?php

declare(strict_types=1);

namespace Fbrinker\ExtensionCheck\Extension;

use ReflectionExtension;

class ExtensionInfo
{
    /** @var ReflectionExtension */
    private $extensionReflection;

    public function __construct(string $extension)
    {
        $this->extensionReflection =  new ReflectionExtension($extension);
    }

    public function getClasses(): array
    {
        $classes = $this->extensionReflection->getClassNames();

        \natcasesort($classes);
        return $classes;
    }

    public function getFunctions(): array
    {
        $functionReflections =  $this->extensionReflection->getFunctions();

        if (empty($functionReflections)) {
            return [];
        }

        $functions = [];
        foreach ($functionReflections as $functionReflection) {
            $functions[] = $functionReflection->getName();
        }

        \natcasesort($functions);
        return $functions;
    }

    public function getConstants(): array
    {
        $constants =  $this->extensionReflection->getConstants();

        if (empty($constants)) {
            return [];
        }

        $constants = array_keys($constants);
        \natcasesort($constants);
        return $constants;
    }

    public function getRequiredDependencies(): array
    {
        $dependencies = $this->extensionReflection->getDependencies();

        if (empty($dependencies)) {
            return [];
        }

        $requiredDependencies = [];
        foreach ($dependencies as $dependency => $status) {
            if ($status !== 'required') {
                continue;
            }

            $requiredDependencies[] = $dependency;
        }

        \natcasesort($requiredDependencies);
        return $requiredDependencies;
    }
}