<?php

declare(strict_types=1);

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

use LIT\MCP\Integrations\Divi\BlockTree\NodeIndex;
use LIT\MCP\Integrations\Divi\BlockTree\Parser;
use PHPUnit\Framework\TestCase;

final class NodeIndexTest extends TestCase
{
    public function testAssignsPathIdsPerParentAndLetter(): void
    {
        $index = NodeIndex::build((new Parser())->parse($this->fixture('synthetic-basic.html')));

        self::assertSame(
            [
                's0', 's0.r0', 's0.r0.c0', 's0.r0.c0.m0', 's0.r0.c1', 's0.r0.c1.m0', 's0.r0.c1.m1', 's0.r0.c1.m2',
                's1', 's1.r0', 's1.r0.c0', 's1.r0.c0.m0', 's1.r0.c1', 's1.r0.c1.m0', 's1.r0.c1.m0.m0',
                's1.r0.c1.m0.m1',
            ],
            array_column($index->entries(), 'id')
        );
        self::assertSame('divi/button', $index->find('s0.r0.c1.m2')?->name());
        self::assertSame('s0.r0.c1', $index->parentId($index->find('s0.r0.c1.m2')));
        self::assertNull($index->parentId($index->find('s1')));
        self::assertSame('divi/placeholder', $index->root() instanceof \LIT\MCP\Integrations\Divi\BlockTree\Block
            ? $index->root()->name() : '');
        self::assertSame($index->root(), $index->parentOf($index->find('s0')));
        self::assertNull($index->find('s9'));
    }

    public function testGlobalAndForeignBlocksAreLeavesWithOwnLetters(): void
    {
        $index = NodeIndex::build((new Parser())->parse($this->fixture('synthetic-mixed.html')));

        self::assertSame(
            ['x0', 's0', 's0.c0', 's0.c0.m0', 's0.c1', 's0.c1.r0', 's0.c1.r0.c0', 's0.c1.r0.c0.m0', 's0.c1.r0.c1',
                's1', 's1.g0', 's1.g1', 's1.g2'],
            array_column($index->entries(), 'id')
        );
        self::assertSame(1, preg_match(NodeIndex::ID_PATTERN, 's1.g2'));
        self::assertSame(0, preg_match(NodeIndex::ID_PATTERN, 's1..g2'));
    }

    public function testDocumentWithoutPlaceholderIsItsOwnRoot(): void
    {
        $document = (new Parser())->parse('<!-- wp:divi/section /-->');
        $index = NodeIndex::build($document);

        self::assertSame($document, $index->root());
        self::assertSame('s0', $index->entries()[0]['id']);
    }

    private function fixture(string $name): string
    {
        return (string) file_get_contents(dirname(__DIR__, 4) . '/Fixtures/divi/' . $name);
    }
}