<?php

declare(strict_types=1);

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

use LIT\MCP\Integrations\Divi\BlockTree\Block;
use LIT\MCP\Integrations\Divi\BlockTree\GlobalInstance;
use LIT\MCP\Integrations\Divi\BlockTree\LibraryContent;
use LIT\MCP\Integrations\Divi\BlockTree\NodeIndex;
use LIT\MCP\Integrations\Divi\BlockTree\Parser;
use LIT\MCP\Integrations\Divi\BlockTree\Serializer;
use LIT\MCP\Tests\Support\DiviFixtures;
use PHPUnit\Framework\TestCase;

final class GlobalInstanceTest extends TestCase
{
    private static function libraryRoot(string $file): Block
    {
        return LibraryContent::roots(LibraryContent::load(new Parser(), DiviFixtures::markup('stage3/' . $file)))[0];
    }

    private static function pageIndex(): NodeIndex
    {
        return NodeIndex::build((new Parser())->parse(DiviFixtures::markup('stage3/page--globale-instanzen.html')));
    }

    /** @return array<string, array{string, int, string}> */
    public static function instances(): array
    {
        return [
            'global section' => ['library-global--globaler-abschnitt.html', 1058, '<!-- /wp:divi/global-layout -->'],
            'global module (void)' => ['library-global--globales-modul.html', 1059, '/-->'],
        ];
    }

    /** @dataProvider instances */
    public function testInstanceMatchesTheVisualBuilderByteForByte(string $file, int $id, string $end): void
    {
        $page = DiviFixtures::markup('stage3/page--globale-instanzen.html');
        $start = (int) strpos($page, '<!-- wp:divi/global-layout {"globalModule":"' . $id . '"');
        $expected = substr($page, $start, (int) strpos($page, $end, $start) + strlen($end) - $start);

        $instance = GlobalInstance::of(self::libraryRoot($file), $id);

        self::assertSame($expected, Serializer::block($instance));
        self::assertTrue($instance->isOpaque());
        self::assertTrue($instance->isGlobal());
    }

    public function testOfLeavesTheLibraryRootUnchanged(): void
    {
        $root = self::libraryRoot('library-global--globaler-abschnitt.html');
        $before = Serializer::block($root);

        GlobalInstance::of($root, 1058);

        self::assertSame($before, Serializer::block($root));
    }

    public function testEffectiveNameOfAnInstanceIsItsRootType(): void
    {
        $index = self::pageIndex();

        self::assertSame('divi/section', GlobalInstance::effectiveName($index->find('g0')));
        self::assertSame('divi/text', GlobalInstance::effectiveName($index->find('s0.r0.c0.g0')));
        self::assertSame('divi/section', GlobalInstance::effectiveName($index->find('s0')));
    }

    public function testDeglobalizeRestoresTheLibraryRoot(): void
    {
        $root = self::libraryRoot('library-global--globaler-abschnitt.html');

        $plain = GlobalInstance::deglobalize(self::pageIndex()->find('g0')->copy());

        self::assertSame('divi/section', $plain->name());
        self::assertFalse($plain->isOpaque());
        self::assertEquals($root->attrs(), $plain->attrs());
        self::assertSame(
            array_map([Serializer::class, 'block'], $root->children()),
            array_map([Serializer::class, 'block'], $plain->children())
        );
        self::assertStringNotContainsString('globalParent', Serializer::block($plain));
    }

    public function testDeglobalizeReachesNestedInstances(): void
    {
        $section = GlobalInstance::deglobalize(self::pageIndex()->find('s0')->copy());

        $markup = Serializer::block($section);
        self::assertStringNotContainsString('global-layout', $markup);
        self::assertStringContainsString('<!-- wp:divi/text {"builderVersion":"5.2.1","content":', $markup);
    }

    /** Stored content is not trusted: an instance with an unusable blockName stays an opaque instance. */
    public function testDeglobalizeKeepsAnInstanceWithAnInvalidBlockName(): void
    {
        $markup = '<!-- wp:divi/global-layout {"globalModule":"5","blockName":"Divi Text"} /-->';
        $instance = (new Parser())->parse($markup)->children()[0];

        $result = GlobalInstance::deglobalize($instance);

        self::assertSame($instance, $result);
        self::assertSame($markup, Serializer::block($result));
    }
}