<?php

declare(strict_types=1);

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

use LIT\MCP\Integrations\Divi\BlockTree\AttrMap;
use LIT\MCP\Integrations\Divi\BlockTree\Block;
use LIT\MCP\Integrations\Divi\BlockTree\NodeIndex;
use LIT\MCP\Integrations\Divi\BlockTree\NodeSummary;
use LIT\MCP\Integrations\Divi\BlockTree\Outline;
use LIT\MCP\Integrations\Divi\BlockTree\Parser;
use PHPUnit\Framework\TestCase;
use stdClass;

final class OutlineTest extends TestCase
{
    public function testRowsAndTextOfAPage(): void
    {
        $index = NodeIndex::build((new Parser())->parse($this->fixture('synthetic-basic.html')));
        $outline = new Outline(['a1b2c3d4-e5f6-4a7b-8c9d-0e1f2a3b4c5d' => 'Hero-Titel']);

        $rows = $outline->rows($index);
        self::assertFalse($outline->wasTruncated());

        self::assertSame(
            ['id' => 's0.r0.c1.m0', 'type' => 'heading', 'label' => '', 'excerpt' => 'Willkommen bei Müller & Söhne',
                'info' => '', 'presets' => ['Hero-Titel'], 'children' => 0, 'editable' => true, 'depth' => 3,
                'truncated' => false],
            $rows[5]
        );
        self::assertSame('Spalten 8_24+16_24', $rows[1]['info']);
        self::assertSame('Seit 1987 zuverlässig – jetzt anfragen.', $rows[6]['excerpt']);
        self::assertSame(
            's0 section "Hero"' . "\n"
                . '  s0.r0 row "Hero – Zeile" [Spalten 8_24+16_24]' . "\n"
                . '    s0.r0.c0 column' . "\n"
                . '      s0.r0.c0.m0 image "Hero – Bild" – Unser Team vor dem Büro',
            implode("\n", array_slice(explode("\n", $outline->text($rows)), 0, 4))
        );
    }

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

        $rows = $outline->rows($index, 's1.r0.c1', 1);

        self::assertSame(['s1.r0.c1', 's1.r0.c1.m0'], array_column($rows, 'id'));
        self::assertSame([0, 1], array_column($rows, 'depth'));
        self::assertSame(2, $rows[1]['children']);
    }

    /** Ruling S18: outline breadth limit – caps children per parent, marks the parent truncated. */
    public function testBreadthLimitCapsChildrenPerParentAndMarksTruncation(): void
    {
        $index = NodeIndex::build((new Parser())->parse($this->fixture('synthetic-basic.html')));
        $outline = new Outline();

        // s0.r0.c1 has three children (heading, text, button); cap them at two.
        $rows = $outline->rows($index, 's0.r0.c1', null, 2);

        self::assertSame(['s0.r0.c1', 's0.r0.c1.m0', 's0.r0.c1.m1'], array_column($rows, 'id'));
        self::assertTrue($rows[0]['truncated'], 'the parent whose children were cut is marked');
        self::assertFalse($rows[1]['truncated']);
        self::assertTrue($outline->wasTruncated());

        $full = (new Outline())->rows($index, 's0.r0.c1');
        self::assertSame(4, count($full), 'the default limit (50) does not cut three children');
    }

    /** The page root has no row of its own, so a top-level cap can only show up in wasTruncated(). */
    public function testBreadthLimitAtTheTopLevelStillReportsTruncation(): void
    {
        $index = NodeIndex::build((new Parser())->parse($this->fixture('synthetic-basic.html')));
        $outline = new Outline();

        $rows = $outline->rows($index, null, 0, 1);

        self::assertSame(['s0'], array_column($rows, 'id'));
        self::assertTrue($outline->wasTruncated());
    }

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

        self::assertStringContainsString('x0 core/paragraph (nur lesbar)', $text);
        self::assertStringContainsString('s1.g1 row "Globale Zeile" (nur lesbar)', $text);
        self::assertStringContainsString('s0 section [specialty]', $text);
        self::assertStringContainsString('s0.c1.r0 row-inner [Spalten 1_2+1_2]', $text);
    }

    public function testSummaryHelpers(): void
    {
        self::assertSame('{post_title}', NodeSummary::textOf(
            '$variable({"type":"content","value":{"name":"post_title","settings":{}}})$'
        ));
        self::assertSame('Mehr', NodeSummary::textOf(['linkUrl' => '/x', 'text' => 'Mehr']));
        self::assertSame('', NodeSummary::textOf(new stdClass()));
    }

    public function testLabelIsWhitespaceNormalizedAndBounded(): void
    {
        $block = self::blockWithAdminLabel("Hero  \n  Titel\twith  space");
        self::assertSame('Hero Titel with space', NodeSummary::label($block));

        $long = str_repeat('a', 200);
        $shortened = NodeSummary::label(self::blockWithAdminLabel($long));
        self::assertLessThan(200, mb_strlen($shortened));
        self::assertStringEndsWith('…', $shortened);
    }

    private static function blockWithAdminLabel(string $label): Block
    {
        return Block::create('divi/text', [
            'module' => ['meta' => ['adminLabel' => ['desktop' => ['value' => $label]]]],
        ]);
    }

    public function testAttrMapFlattenGetSetRemove(): void
    {
        $attrs = [
            'builderVersion' => '5.2.1',
            'title' => ['innerContent' => ['desktop' => ['value' => 'Hallo']], 'decoration' => ['font' => [
                'font' => ['desktop' => ['value' => ['headingLevel' => 'h2']], 'phone' => ['value' => ['size' => '20px']]],
            ]]],
            'module' => ['decoration' => ['spacing' => ['desktop' => ['value' => new stdClass()]]]],
        ];

        self::assertSame(
            ['module.decoration.spacing', 'title.decoration.font.font', 'title.innerContent'],
            array_keys(AttrMap::flatten($attrs))
        );
        self::assertSame('Hallo', AttrMap::desktop($attrs, 'title.innerContent'));
        self::assertTrue(AttrMap::isBreakpointMap(['desktop' => [], 'phone' => []]));
        self::assertFalse(AttrMap::isBreakpointMap(['desktop' => [], 'font' => []]));

        $changed = AttrMap::set($attrs, 'module.decoration.spacing.desktop.value.padding', '10px');
        self::assertSame('10px', AttrMap::get($changed, 'module.decoration.spacing.desktop.value.padding'));

        $removed = AttrMap::remove($attrs, 'title.decoration.font.font');
        self::assertArrayNotHasKey('decoration', $removed['title']);
        self::assertSame($attrs, AttrMap::remove($attrs, 'nope.path'));
    }

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