<?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\Parser;
use LIT\MCP\Integrations\Divi\BlockTree\Serializer;
use LogicException;
use PHPUnit\Framework\TestCase;

final class ContainerTest extends TestCase
{
    public function testInsertChildRefusesOnAnOpaqueBlock(): void
    {
        $document = (new Parser())->parse('<!-- wp:divi/section {"globalModule":"x"} --><!-- /wp:divi/section -->');
        $section = $document->children()[0];
        self::assertTrue($section->isOpaque());

        $this->expectException(LogicException::class);
        $section->insertChild(0, Block::create('divi/text'));
    }

    public function testInsertChildRefusesOnABlockWithUndecodableAttrs(): void
    {
        $document = (new Parser())->parse('<!-- wp:divi/section {"a":} --><!-- /wp:divi/section -->');
        $section = $document->children()[0];
        self::assertTrue($section->isOpaque());

        $this->expectException(LogicException::class);
        $section->insertChild(0, Block::create('divi/text'));
    }

    public function testRemoveChildRefusesOnAnOpaqueBlock(): void
    {
        $document = (new Parser())->parse(
            '<!-- wp:divi/section {"globalModule":"x"} --><!-- wp:divi/row --><!-- /wp:divi/row --><!-- /wp:divi/section -->'
        );
        $section = $document->children()[0];
        $row = $section->children()[0];
        self::assertTrue($section->isOpaque());

        $this->expectException(LogicException::class);
        $section->removeChild($row);
    }

    public function testAppendRefusesOnAVoidBlock(): void
    {
        $void = Block::parsed('divi/image', [], '<!-- wp:divi/image /-->', true, false);

        $this->expectException(LogicException::class);
        $void->append('text');
    }

    public function testReplaceChildKeepsTheTextAround(): void
    {
        $document = (new Parser())->parse("A<!-- wp:divi/text /-->B");
        $new = Block::create('divi/button');

        $document->replaceChild($document->children()[0], $new);

        self::assertSame('A<!-- wp:divi/button --><!-- /wp:divi/button -->B', Serializer::document($document));
    }

    public function testUnifyLineBreaksOnlyTouchesWhitespaceBetweenBlocks(): void
    {
        $document = (new Parser())->parse(
            "<!-- wp:divi/section -->\r\n<!-- wp:divi/row -->\r\n<!-- /wp:divi/row -->\r\n<!-- /wp:divi/section -->x\r\ny"
        );

        $document->unifyLineBreaks();

        self::assertSame(
            "<!-- wp:divi/section -->\n<!-- wp:divi/row -->\n<!-- /wp:divi/row -->\n<!-- /wp:divi/section -->x\r\ny",
            Serializer::document($document)
        );
    }

    /** Global instances stay opaque: their bytes are Divi's, even the whitespace inside. */
    public function testUnifyLineBreaksLeavesOpaqueBlocksAlone(): void
    {
        $markup = "<!-- wp:divi/global-layout {\"globalModule\":\"5\"} -->\r\n<!-- wp:divi/text /-->\r\n"
            . "<!-- /wp:divi/global-layout -->\r\n";
        $document = (new Parser())->parse($markup);

        $document->unifyLineBreaks();

        self::assertSame(substr($markup, 0, -2) . "\n", Serializer::document($document));
    }

    public function testReplaceChildRefusesOnAnOpaqueBlock(): void
    {
        $document = (new Parser())->parse(
            '<!-- wp:divi/global-layout {"globalModule":"5"} --><!-- wp:divi/text /--><!-- /wp:divi/global-layout -->'
        );
        $instance = $document->children()[0];

        $this->expectException(LogicException::class);

        $instance->replaceChild($instance->children()[0], Block::create('divi/button'));
    }
}