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

set_time_limit(0);

define('GITHUB_API_LARAVEL_TAGS', 'https://api.github.com/repos/laravel/framework/tags');
define('GITHUB_LARAVEL_ARCHIVE', 'https://github.com/laravel/framework/archive/');

$timer = microtime(true);

$tempPath = __DIR__.'/.temp';
$targetPath = __DIR__.'/../src/Illuminate/Foundation/';

$version = getVersion();
echo "Latest Laravel Version: {$version}".PHP_EOL.PHP_EOL;

createDirectory($tempPath);
handleArchive($version, $tempPath);
moveDirectory($tempPath, $targetPath, $version);
deleteDirectory($tempPath);

$timer = round(microtime(true) - $timer, 2);

echo PHP_EOL."Finished in {$timer} seconds.".PHP_EOL;

/**
 * Get the latest Laravel version.
 */
function getVersion(): string
{
    $request = curl_init(GITHUB_API_LARAVEL_TAGS);
    curl_setopt($request, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($request, CURLOPT_USERAGENT, 'PHP Script');

    $response = curl_exec($request);
    curl_close($request);

    if (! $response) {
        echo 'Error: Could not get the latest Laravel version.';
        exit(1);
    }

    $tags = json_decode($response);
    $version = $tags[0]->name;
    $current = getCurrentVersion();

    if ($version === $current && ! in_array('--force', $_SERVER['argv'])) {
        echo "Laravel is already on the latest version ({$current}).".PHP_EOL;

        if (getenv('CI')) {
            exit(0);
        }

        echo 'Use --force to force update.'.PHP_EOL;
        exit(1);
    }

    file_put_contents(__DIR__.'/.laravel-version', $version);

    return $version;
}

/**
 * Get the current Laravel version.
 */
function getCurrentVersion(): ?string
{
    if (! file_exists($file = __DIR__.'/../src/Illuminate/Foundation/Application.php')) {
        return null;
    }

    $current = file_get_contents($file);
    preg_match('/VERSION = \'(.*)\'/', $current, $matches);

    return "v{$matches[1]}";
}

/**
 * Create a directory if it doesn't exist.
 */
function createDirectory(string $path): void
{
    if (file_exists($path)) {
        deleteDirectory($path);
    }

    mkdir($path, 0777, true);
}

/**
 * Download and extract the archive.
 */
function handleArchive(string $version, string $path): void
{
    $file = "{$version}.tar.gz";
    $archive = "{$path}/{$file}";

    file_put_contents($archive, fopen(GITHUB_LARAVEL_ARCHIVE.$file, 'r'));
    echo "Downloaded the archive to: {$archive}".PHP_EOL;

    (new PharData($archive))->extractTo($path);
    echo "Extracted archive to: {$path}".PHP_EOL;
}

/**
 * Move the Foundation directory into the project.
 */
function moveDirectory(string $tempPath, string $targetPath, string $version): void
{
    $version = substr($version, 1);
    $extracted = "{$tempPath}/framework-{$version}/src/Illuminate/Foundation";

    if (! file_exists($extracted)) {
        echo 'Error: Extracted Foundation directory not found.';
        exit(1);
    }

    if (file_exists($targetPath)) {
        deleteDirectory($targetPath);
    }

    mkdir($targetPath, 0777, true);
    rename($extracted, $targetPath);

    echo "Moved Foundation to: {$targetPath}".PHP_EOL;
}

/**
 * Delete a directory recursively.
 */
function deleteDirectory(string $directory): void
{
    if (! file_exists($directory)) {
        return;
    }

    $files = new RecursiveIteratorIterator(
        new RecursiveDirectoryIterator($directory, RecursiveDirectoryIterator::SKIP_DOTS),
        RecursiveIteratorIterator::CHILD_FIRST
    );

    foreach ($files as $fileInfo) {
        $remove = ($fileInfo->isDir() ? 'rmdir' : 'unlink');
        $remove($fileInfo->getRealPath());
    }

    rmdir($directory);

    echo "Deleted directory: {$directory}".PHP_EOL;
}