<?php

declare(strict_types=1);

namespace LIT\MCP\Tests\Unit\Integrations\Divi\Pages;

use Brain\Monkey\Functions;
use LIT\MCP\Abilities\Rev;
use LIT\MCP\Integrations\Divi\BlockTree\NodeIndex;
use LIT\MCP\Integrations\Divi\BlockTree\Parser;
use LIT\MCP\Integrations\Divi\BlockTree\Serializer;
use LIT\MCP\Integrations\Divi\Pages\DiviInsertAbility;
use LIT\MCP\Tests\Support\DiviFixtures;
use LIT\MCP\Tests\Support\DiviWriterFixture;
use LIT\MCP\Tests\Unit\TestCase;

/**
 * Ruling P20 (regression): a user without unfiltered_html (editor) changes one place of a real page;
 * every other byte stays (JSON unicode escapes of markup, CRLF, empty block pairs, instances, foreign
 * blocks). The pages are read from the fixture files only (never written inline), so no tool in
 * between can decode an escape sequence.
 */
final class DiviEditorByteIdentityTest extends TestCase
{
    /** @return array<string, array{string}> */
    public static function pages(): array
    {
        $pages = [];
        foreach (['', 'stage3/'] as $dir) {
            foreach (glob(dirname(__DIR__, 4) . '/Fixtures/divi/' . $dir . '*.html') ?: [] as $file) {
                $name = $dir . basename($file);
                if ($name !== 'divi4-shortcodes.html') {
                    $pages[$name] = [$name];
                }
            }
        }

        return $pages;
    }

    /** @dataProvider pages */
    public function testAnEditorInsertKeepsEveryOtherByte(string $fixture): void
    {
        $original = DiviFixtures::markup($fixture);
        self::assertNotSame('', $original, $fixture);
        DiviFixtures::givenPost($original);
        Functions\when('get_preview_post_link')->justReturn('https://kunde.test/?page_id=7&preview=true');
        $saved = [];

        $result = (new DiviInsertAbility(DiviWriterFixture::writer($saved, unfiltered: false)))->execute([
            'post_id' => 7,
            'tree_rev' => Rev::of($original),
            'nodes' => [['type' => 'section']],
        ]);

        self::assertTrue($result['ok'] ?? false, $fixture . ': ' . json_encode($result));
        self::assertCount(1, $saved);
        $node = NodeIndex::build((new Parser())->parse($saved[0]))->find($result['changed'][0]['id']);
        self::assertNotNull($node, $fixture);
        $inserted = Serializer::block($node);
        $at = strpos($saved[0], $inserted);
        self::assertNotFalse($at, $fixture);
        self::assertSame(
            $original,
            substr($saved[0], 0, (int) $at) . substr($saved[0], (int) $at + strlen($inserted)),
            $fixture . ': only the new section was added'
        );
    }
}