<?php

namespace App\Http\Controllers;

use App\User;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Artisan;

class InstallController extends Controller
{
    public function index(Request $request)
    {
        abort_if(file_exists(base_path('.env')), 404);

        return view('installer.index');
    }

    public function getRequirements()
    {
        abort_if(file_exists(base_path('.env')), 404);
        $reqs = [];

        $phpExtensions = [
            'bcmath',
            'ctype',
            'curl',
            'intl',
            'json',
            'mbstring',
            'openssl',
            'gd',
            'redis',
            'pdo_mysql',
            'pdo_pgsql',
        ];

        $dirs = [
            'bootstrap',
            'storage',
        ];

        $reqs['php'] = [
            'version' => PHP_VERSION,
            'supported' => (bool) version_compare(PHP_VERSION, '7.4'),
            'min_version' => '7.4',
            'memory_limit' => [
                'recommended' => '256M',
                'actual' => ini_get('memory_limit'),
            ],
            'upload_max_filesize' => [
                'recommended' => '15M',
                'actual' => ini_get('upload_max_filesize'),
            ],
            'post_max_size' => [
                'recommended' => '15M',
                'actual' => ini_get('post_max_size'),
            ],
        ];

        $reqs['php']['extensions'] = collect($phpExtensions)
            ->map(function ($ext) {
                return ['name' => $ext, 'loaded' => extension_loaded($ext)];
            });

        $reqs['permissions'] = collect($dirs)
            ->map(function ($path) {
                return [
                    'name' => $path,
                    'writable' => is_writable(base_path($path)),
                    'mode' => substr(sprintf('%o', fileperms(base_path($path))), -4),
                    'path' => base_path($path),
                ];
            });

        return $reqs;
    }

    public function store(Request $request)
    {
        abort_if(file_exists(base_path('.env')), 404, 'The .env configuration file already exists.');

        return $this->checkPermissions($request);
    }

    protected function checkPermissions($request)
    {
        abort_if(file_exists(base_path('.env')), 404);

        if (file_exists(base_path('.env'))) {
            return response('Found existing .env file, aborting installation', 400);
        }

        if (! is_writable(base_path('storage/'))) {
            return response('Permission Problem(s), cannot write to bootstrap or storage directories', 400);
        }

        return $this->checkDatabase($request);
    }

    protected function checkDatabase($request)
    {
        abort_if(file_exists(base_path('.env')), 404);

        $driver = $request->input('db_driver', 'mysql');
        $name = $request->input('db_name', 'pixelfed');
        $host = $request->input('db_host', 'localhost');
        $username = $request->input('db_username');
        $password = $request->input('db_password');
        $dsn = "{$driver}:dbname={$name};host={$host}";
        $dbh = new \PDO($dsn, $username, $password);

        try {
            $dbh->query('SELECT count(*) from INFORMATION_SCHEMA.TABLES');
        } catch (\PDOException $e) {
            return response($e, 400);
        }

        $this->createConfiguration($request);
    }

    protected function createConfiguration($request)
    {
        abort_if(file_exists(base_path('.env')), 404);
        $source = base_path('.env.example');
        $target = base_path('.env');
        @copy($source, $target);

        $this->updateConfig('APP_URL=http://localhost', 'APP_URL=https://'.$request->input('domain'));
        $this->updateConfig('APP_NAME="Pixelfed Prod"', 'APP_NAME="'.$request->input('name').'"');
        $this->updateConfig('APP_DOMAIN="localhost"', 'APP_DOMAIN="'.$request->input('domain').'"');
        $this->updateConfig('ADMIN_DOMAIN="localhost"', 'ADMIN_DOMAIN="'.$request->input('domain').'"');
        $this->updateConfig('SESSION_DOMAIN="localhost"', 'SESSION_DOMAIN="'.$request->input('domain').'"');

        $this->updateConfig('DB_CONNECTION=mysql', 'DB_CONNECTION='.$request->input('db_driver'));
        $this->updateConfig('DB_HOST=127.0.0.1', 'DB_HOST='.$request->input('db_host'));
        $this->updateConfig('DB_PORT=3306', 'DB_PORT='.$request->input('db_port'));
        $this->updateConfig('DB_DATABASE=pixelfed', 'DB_DATABASE='.$request->input('db_name'));
        $this->updateConfig('DB_USERNAME=pixelfed', 'DB_USERNAME='.$request->input('db_username'));
        $this->updateConfig('DB_PASSWORD=pixelfed', 'DB_PASSWORD='.$request->input('db_password'));

        $this->updateConfig('CACHE_DRIVER=redis', 'CACHE_DRIVER='.$request->input('cache_driver'));
        $this->updateConfig('QUEUE_DRIVER=redis', 'QUEUE_DRIVER='.$request->input('queue_driver'));
        $this->updateConfig('REDIS_SCHEME=tcp', 'REDIS_SCHEME='.$request->input('redis_scheme'));
        $this->updateConfig('REDIS_HOST=127.0.0.1', 'REDIS_HOST='.$request->input('redis_host'));
        $this->updateConfig('REDIS_PORT=6379', 'REDIS_PORT='.$request->input('redis_port'));
        $this->updateConfig('REDIS_PASSWORD=null', 'REDIS_PASSWORD='.$request->input('redis_password'));

        $this->updateConfig('ACTIVITY_PUB=false', 'ACTIVITY_PUB='.($request->input('features.activitypub') ? 'true' : 'false'));
        $this->updateConfig('AP_INBOX=false', 'AP_INBOX='.($request->input('features.activitypub') ? 'true' : 'false'));
        $this->updateConfig('AP_REMOTE_FOLLOW=false', 'AP_REMOTE_FOLLOW='.($request->input('features.activitypub') ? 'true' : 'false'));
        $this->updateConfig('OPEN_REGISTRATION=true', 'OPEN_REGISTRATION='.($request->input('features.open_registration') ? 'true' : 'false'));

        $this->updateConfig('ENFORCE_EMAIL_VERIFICATION=true', 'ENFORCE_EMAIL_VERIFICATION='.($request->input('mail_address_verify') ? 'true' : 'false'));
        $this->updateConfig('PF_OPTIMIZE_IMAGES=true', 'PF_OPTIMIZE_IMAGES='.($request->input('optimize_media') ? 'true' : 'false'));
        $this->updateConfig('MAX_PHOTO_SIZE=15000', 'MAX_PHOTO_SIZE='.($request->input('max_upload_size') * 1000));
        $this->updateConfig('MEDIA_TYPES=image/jpeg,image/png,image/gif', 'MEDIA_TYPES='.implode(',', $request->input('mime_types')));
        $this->updateConfig('OAUTH_ENABLED=true', 'OAUTH_ENABLED=true');

        if ($request->input('optimize_media') == true) {
            $this->updateConfig('IMAGE_QUALITY=80', 'IMAGE_QUALITY='.$request->input('image_quality'));
        }

        sleep(1);
        Artisan::call('config:cache');
        sleep(1);
        Artisan::call('key:generate --force');
        sleep(1);
        Artisan::call('migrate --force');
        sleep(1);
        Artisan::call('config:cache');

        if ($request->has('features.activitypub') && $request->input('features.activitypub') == true) {
            Artisan::call('instance:actor');
        }

        if ($request->filled(['admin_username', 'admin_password', 'admin_email'])) {
            $user = new User;
            $user->username = $request->input('admin_username', 'admin');
            $user->name = $request->input('admin_username', 'admin');
            $user->email = $request->input('admin_email');
            $user->password = bcrypt($request->input('admin_password'));
            $user->is_admin = true;
            $user->email_verified_at = now();
            $user->save();
        }
    }

    protected function updateConfig($key, $value)
    {
        $f = file_get_contents(base_path('.env'));
        if (strpos($f, $key) !== false) {
            $u = str_replace($key, $value, $f);
        } else {
            $u = $f;
            $u .= $value.PHP_EOL;
        }
        sleep(1);
        file_put_contents(base_path('.env'), $u);
    }

    public function precheckDatabase(Request $request)
    {
        abort_if(file_exists(base_path('.env')), 404);
        $driver = $request->input('db_driver', 'mysql');
        $name = $request->input('db_name', 'pixelfed');
        $host = $request->input('db_host', 'localhost');
        $username = $request->input('db_username');
        $password = $request->input('db_password');
        $dsn = "{$driver}:dbname={$name};host={$host}";
        $dbh = new \PDO($dsn, $username, $password);

        try {
            $dbh->query('SELECT count(*) from INFORMATION_SCHEMA.TABLES');
        } catch (\PDOException $e) {
            return response($e, 400);
        }
    }
}
