<?php

declare(strict_types=1);

namespace LIT\MCP\Integrations\Divi\Design;

use RuntimeException;

defined('ABSPATH') || exit;

/**
 * The site-wide custom CSS of the active theme: WordPress' "Zusätzliches CSS", a custom_css post per theme. Divi 5's
 * field "Eigenes CSS" writes the same post (themes/Divi/epanel/core_functions.php), so this is the one place. Not
 * final so the area and the abilities can be tested with a mock.
 */
class CustomCssStore
{
    /**
     * @return array{stylesheet: string, css: string} The stored text – not wp_get_custom_css(), which plugins filter.
     */
    public function read(): array
    {
        $stylesheet = get_stylesheet();
        $post = wp_get_custom_css_post($stylesheet);

        return ['stylesheet' => $stylesheet, 'css' => $post === null ? '' : (string) $post->post_content];
    }

    /** @throws RuntimeException When WordPress refuses to store the CSS. */
    public function write(string $css): void
    {
        $saved = wp_update_custom_css_post($css, ['stylesheet' => get_stylesheet()]);
        if (is_wp_error($saved)) {
            throw new RuntimeException($saved->get_error_message());
        }
    }
}