#!/usr/bin/env php
<?php

namespace Studip\Cli;

use Symfony\Component\Console\Application;

require __DIR__ . '/studip_cli_env.inc.php';
require __DIR__ . '/../composer/autoload.php';

\StudipAutoloader::addAutoloadPath('cli', 'Studip\\Cli');

$application = new Application();
$application->addCommands(loadCoreCommands());
$application->addCommands(loadPluginCommands($application));
$application->run();

function loadCoreCommands(): array
{
    $commands = require __DIR__ . '/commands.php';
    return array_map(fn($command) => app($command), $commands);
}

function loadPluginCommands(Application $application): array
{
    $pluginCommands = [];
    foreach (scanPluginDirectory() as $manifest) {
        $pluginCommands = array_merge($pluginCommands, getPluginCommands($application, $manifest));
    }
    return $pluginCommands;
}

function scanPluginDirectory(): \Generator
{
    $basepath = \Config::get()->PLUGINS_PATH;
    $pluginManager = \PluginManager::getInstance();
    $iterator = createPluginManifestIterator($basepath);

    foreach ($iterator as $manifestFile) {
        $manifest = $pluginManager->getPluginManifest($manifestFile->getPath());
        if (isValidPluginManifest($manifest, $basepath, $manifestFile)) {
            $manifest['path'] = $manifestFile->getPath();
            yield $manifest;
        }
    }
}

function createPluginManifestIterator(string $basepath): \RegexIterator
{
    return new \RegexIterator(
        new \RecursiveIteratorIterator(
            new \RecursiveDirectoryIterator(
                $basepath,
                \FilesystemIterator::FOLLOW_SYMLINKS | \FilesystemIterator::UNIX_PATHS
            )
        ),
        '/\/plugin\.manifest$/',
        \RegexIterator::MATCH
    );
}

function isValidPluginManifest(array $manifest, string $basepath, \SplFileInfo $manifestFile): bool
{
    if (!isset($manifest['pluginclassname'], $manifest['cli'])) {
        return false;
    }

    $pluginpath = $basepath . '/' . $manifest['origin'] . '/' . $manifest['pluginclassname'];
    return $pluginpath === $manifestFile->getPath();
}

function getPluginCommands(Application $application, array $manifest): array
{
    $cliFile = $manifest['path'] . '/' . $manifest['cli'];
    $commandsFn = require_once $cliFile;
    $commands = [];

    foreach ($commandsFn($application) as $class => $path) {
        require_once $path;
        $commands[] = app($class);
    }

    return $commands;
}