<?php

/**
 * JCH Optimize - Performs several front-end optimizations for fast downloads
 *
 * @package   jchoptimize/wordpress-platform
 * @author    Samuel Marshall <samuel@jch-optimize.net>
 * @copyright Copyright (c) 2023 Samuel Marshall / JCH Optimize
 * @license   GNU/GPLv3, or later. See LICENSE file
 *
 * If LICENSE file missing, see <http://www.gnu.org/licenses/>.
 */

namespace JchOptimize\WordPress\Model;

use _JchOptimizeVendor\V91\Joomla\Filesystem\File;
use _JchOptimizeVendor\V91\Psr\Http\Message\UploadedFileInterface;
use Exception;
use JchOptimize\Core\Mvc\Model;
use JchOptimize\Core\Registry;
use JchOptimize\Core\SystemUri\SystemUri;

use function array_unique;
use function in_array;
use function pathinfo;
use function strtolower;
use function update_option;

use const JCH_PLUGIN_DIR;
use const PATHINFO_EXTENSION;

class BulkSettings extends Model
{
    public function setDefaultSettings(): bool
    {
        return update_option('jch-optimize_settings', []);
    }

    public function exportSettings(): string
    {
        $file = JCH_PLUGIN_DIR . 'tmp/' . SystemUri::currentUri()->getHost() . '_jchoptimize_settings.json';

        $params = $this->state->toString();

        File::write($file, $params);

        return $file;
    }

    public function importSettings(UploadedFileInterface $uploadedFile): void
    {
        $clientFilename = $uploadedFile->getClientFilename();

        if (
            $clientFilename === null
            || strtolower(pathinfo($clientFilename, PATHINFO_EXTENSION)) !== 'json'
        ) {
            throw new Exception('Only JSON settings files can be imported.');
        }

        $clientMediaType = strtolower((string)$uploadedFile->getClientMediaType());

        $allowedMediaTypes = ['application/json', 'application/octet-stream', 'text/json', 'text/plain'];

        if ($clientMediaType !== '' && !in_array($clientMediaType, $allowedMediaTypes, true)) {
            throw new Exception('Invalid settings file type.');
        }

        $stream = $uploadedFile->getStream();
        $stream->rewind();
        $uploadedSettings = (new Registry())->loadString($stream->getContents());

        if ($uploadedSettings->get('merge')) {
            $this->mergeSettings($uploadedSettings);
        } else {
            $this->setState($uploadedSettings);
            update_option('jch-optimize_settings', $uploadedSettings->toArray());
        }
    }

    private function mergeSettings(Registry $uploadedSettings): void
    {
        $uploadedSettings->remove('merge');

        foreach ($uploadedSettings as $setting => $value) {
            if (is_array($value)) {
                $mergedSetting = array_unique(array_merge($this->state->get($setting, []), $value));
            } else {
                $mergedSetting = $value;
            }

            $this->state->set($setting, $mergedSetting);
        }

        update_option('jch-optimize_settings', $this->state->toArray());
    }
}