<?php

declare(strict_types=1);

namespace LIT\MCP\Integrations\Divi\Design;

use LIT\MCP\Abilities\Rev;
use LIT\MCP\Integrations\Divi\Release\DiviFeature;

defined('ABSPATH') || exit;

/**
 * The area "custom_css": the custom CSS of the active theme, inventory {stylesheet, css}. The theme belongs to the
 * design_rev, so a theme switch between dry run and confirmation counts as a change. A write replaces the whole text;
 * verify() insists that WordPress stored exactly what was planned (it would strip markup for accounts without
 * unfiltered_html), so a changed text rolls the change back instead of going live altered.
 */
final class CustomCssArea implements DesignArea
{
    /** The reach of every change, named in the dry run like the theme options (ruling W7). */
    public const SITE_WIDE = 'Eigenes CSS wirkt auf die gesamte Website, auch im Divi-Builder.';

    public function __construct(private CustomCssStore $store)
    {
    }

    public function name(): string
    {
        return 'custom_css';
    }

    public function label(): string
    {
        return 'Eigenes CSS';
    }

    /** It is Divi's own field "Eigenes CSS" (Theme-Anpassung), so it follows the release of the theme options. */
    public function feature(): DiviFeature
    {
        return DiviFeature::ThemeOptionWrite;
    }

    public function refresh(): void
    {
        // read() asks the custom_css post; WordPress keeps its cache in step with every write.
    }

    public function raw(): array
    {
        return $this->store->read();
    }

    public function rev(array $raw): string
    {
        return Rev::of(((string) ($raw['stylesheet'] ?? '')) . "\0" . ((string) ($raw['css'] ?? '')));
    }

    /** $mayRemove has no effect: the text is replaced as a whole. */
    public function write(array $raw, bool $mayRemove): array
    {
        $this->store->write((string) ($raw['css'] ?? ''));

        return $this->store->read();
    }

    public function restore(array $raw): array
    {
        return $this->write($raw, true);
    }

    public function verify(array $expected, array $actual): bool
    {
        return (string) ($expected['css'] ?? '') === (string) ($actual['css'] ?? '');
    }

    public function differences(array $expected, array $actual): array
    {
        return [];
    }
}