<?php

namespace PublishDeck\App\Http\Controllers;

// Exit if accessed directly.
if (! defined('ABSPATH')) {
    exit;
}

use PublishDeck\App\Services\Sync\MetaAllowlist;
use WP_REST_Request;
use WP_REST_Response;

/**
 * GET and PUT the global settings stored in the `fspd_settings` option.
 */
class SettingsController extends Controller
{
    private const OPTION = 'fspd_settings';

    private const DEFAULTS = [
        'always_push_as_draft' => false,
        'skip_unchanged'       => true,
        'meta_allowlist'       => [],
    ];

    public function show(WP_REST_Request $request): WP_REST_Response
    {
        unset($request);

        $stored = get_option(self::OPTION, []);

        return $this->sendSuccess(self::visible(is_array($stored) ? $stored : []));
    }

    public function update(WP_REST_Request $request): WP_REST_Response
    {
        $stored = get_option(self::OPTION, []);
        if (!is_array($stored)) {
            $stored = [];
        }

        if ($request->has_param('always_push_as_draft')) {
            $stored['always_push_as_draft'] = (bool) $request->get_param('always_push_as_draft');
        }

        if ($request->has_param('skip_unchanged')) {
            $stored['skip_unchanged'] = (bool) $request->get_param('skip_unchanged');
        }

        if ($request->has_param('meta_allowlist')) {
            $keys = MetaAllowlist::cleanKeys((array) $request->get_param('meta_allowlist'));
            if ($keys instanceof \WP_Error) {
                return $this->sendError($keys->get_error_message(), 400, $keys->get_error_code());
            }

            $stored['meta_allowlist'] = $keys;
        }

        // allow_local is a wp-config constant only, so clear any stray stored value.
        unset($stored['allow_local']);

        update_option(self::OPTION, $stored, false);

        return $this->sendSuccess(self::visible($stored));
    }

    /**
     * The settings as the screen edits them, with only the meta keys the rule still takes.
     *
     * @param  array<string,mixed> $stored
     * @return array<string,mixed>
     */
    private static function visible(array $stored): array
    {
        $settings                   = array_merge(self::DEFAULTS, $stored);
        $settings['meta_allowlist'] = MetaAllowlist::listed($settings);

        return $settings;
    }
}