<?php

declare(strict_types=1);

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

use LIT\MCP\Integrations\Divi\BlockTree\Block;
use LIT\MCP\Integrations\Divi\BlockTree\Json;
use LIT\MCP\Integrations\Divi\BlockTree\NodeIndex;
use LIT\MCP\Integrations\Divi\BlockTree\Parser;
use LIT\MCP\Integrations\Divi\Compose\VariableRef;
use LIT\MCP\Integrations\Divi\Design\VariableDetachRewrite;
use PHPUnit\Framework\TestCase;

final class VariableDetachRewriteTest extends TestCase
{
    private const RADIUS = 'gvid-radius0001';
    private const CLAIM = 'gvid-claim00001';

    /** A whole reference to global variable $id, as the Divi Builder stores it. */
    public static function ref(string $id, array $settings = []): string
    {
        return VariableRef::serialize('content', $id, $settings);
    }

    /** A breakpoint map with one desktop value. */
    private static function desktop(mixed $value): array
    {
        return ['desktop' => ['value' => $value]];
    }

    /**
     * @param list<array{0: string, 1: array<string, mixed>}> $blocks name and attributes, in the order of the column
     * @return NodeIndex Blocks below s0.r0.c0 are m0, m1, … (g0, … for instances, x0, … for other blocks).
     */
    private static function index(array $blocks): NodeIndex
    {
        $inner = '';
        foreach ($blocks as [$name, $attrs]) {
            $inner .= sprintf('<!-- wp:%s %s /-->', $name, Json::encode($attrs));
        }

        return NodeIndex::build((new Parser())->parse(
            '<!-- wp:divi/section --><!-- wp:divi/row --><!-- wp:divi/column -->' . $inner
            . '<!-- /wp:divi/column --><!-- /wp:divi/row --><!-- /wp:divi/section -->'
        ));
    }

    private static function node(NodeIndex $index, string $id): Block
    {
        $block = $index->find('s0.r0.c0.' . $id);
        self::assertNotNull($block);

        return $block;
    }

    public function testReplacesWholeNumberReferencesAtAnyDepth(): void
    {
        $index = self::index([['divi/button', [
            'button' => ['decoration' => ['border' => self::desktop([
                'radius' => ['topLeft' => self::ref(self::RADIUS), 'topRight' => self::ref(self::RADIUS)],
            ])]],
            'module' => ['decoration' => ['spacing' => self::desktop(['padding' => ['top' => '10px']])]],
        ]]]);

        $attrs = (new VariableDetachRewrite(self::RADIUS, '8px', 'numbers'))->rewrite(self::node($index, 'm0'));

        self::assertSame(
            ['topLeft' => '8px', 'topRight' => '8px'],
            $attrs['button']['decoration']['border']['desktop']['value']['radius'] ?? null
        );
        self::assertSame('10px', $attrs['module']['decoration']['spacing']['desktop']['value']['padding']['top']);
    }

    public function testAStringsVariableKeepsBeforeAndAfterOfTheReference(): void
    {
        $index = self::index([
            ['divi/text', ['content' => ['innerContent' => self::desktop(
                self::ref(self::CLAIM, ['before' => 'Jetzt: ', 'after' => '!'])
            )]]],
            ['divi/text', ['content' => ['innerContent' => self::desktop(self::ref(self::CLAIM))]]],
        ]);
        $rewrite = new VariableDetachRewrite(self::CLAIM, 'Gut beraten', 'strings');

        self::assertSame(
            'Jetzt: Gut beraten!',
            $rewrite->rewrite(self::node($index, 'm0'))['content']['innerContent']['desktop']['value'] ?? null
        );
        self::assertSame(
            'Gut beraten',
            $rewrite->rewrite(self::node($index, 'm1'))['content']['innerContent']['desktop']['value'] ?? null
        );
    }

    public function testOtherTypesIgnoreBeforeAndAfter(): void
    {
        self::assertSame(
            'Open Sans',
            VariableDetachRewrite::replacement(self::ref('gvid-font000001', ['before' => 'x']), 'Open Sans', 'fonts')
        );
        self::assertSame('a1b', VariableDetachRewrite::replacement(self::ref(self::CLAIM, [
            'before' => 'a', 'after' => 'b',
        ]), '1', 'strings'));
    }

    public function testFontsAndOtherReferencesStayUntouched(): void
    {
        $color = VariableRef::serialize('color', 'gcid-primary-color', []);
        $dynamic = VariableRef::serialize('content', 'post_title', []);
        $index = self::index([
            ['divi/heading', [
                'title' => ['decoration' => ['font' => ['font' => self::desktop([
                    'family' => self::ref('gvid-font000001'),
                    'color' => $color,
                ])]]],
                'content' => ['innerContent' => self::desktop($dynamic)],
            ]],
            ['divi/text', ['content' => ['innerContent' => self::desktop(self::ref(self::RADIUS))]]],
            ['core/paragraph', ['content' => self::ref('gvid-font000001')]],
        ]);
        $rewrite = new VariableDetachRewrite('gvid-font000001', 'Open Sans', 'fonts');

        $attrs = $rewrite->rewrite(self::node($index, 'm0'));
        self::assertSame(
            ['family' => 'Open Sans', 'color' => $color],
            $attrs['title']['decoration']['font']['font']['desktop']['value'] ?? null
        );
        self::assertSame($dynamic, $attrs['content']['innerContent']['desktop']['value']);
        self::assertNull($rewrite->rewrite(self::node($index, 'm1')), 'another variable');
        self::assertNull($rewrite->rewrite(self::node($index, 'x0')), 'not a Divi block');
    }

    public function testEmbeddedReferencesStayAndAreNoted(): void
    {
        $embedded = 'Ab ' . self::ref(self::RADIUS) . ' Rundung';
        $index = self::index([
            ['divi/text', [
                'content' => ['innerContent' => self::desktop($embedded)],
                'module' => ['decoration' => ['border' => self::desktop([
                    'radius' => ['topLeft' => self::ref(self::RADIUS)],
                ])]],
            ]],
            ['divi/text', ['content' => ['innerContent' => self::desktop($embedded)]]],
        ]);
        $rewrite = new VariableDetachRewrite(self::RADIUS, '8px', 'numbers');
        $first = self::node($index, 'm0');

        $attrs = $rewrite->rewrite($first);
        self::assertSame($embedded, $attrs['content']['innerContent']['desktop']['value'] ?? null);
        $first->setAttrs((array) $attrs);
        self::assertStringContainsString('eingebettet', (string) $rewrite->leftover($first));
        self::assertStringContainsString('bleibt unverändert', (string) $rewrite->leftover($first));
        self::assertNotNull($rewrite->leftover(self::node($index, 'm1')), 'embedded only: still reported');
        self::assertNull($rewrite->rewrite(self::node($index, 'm1')), 'only embedded: nothing to replace');
        self::assertNull(
            (new VariableDetachRewrite(self::CLAIM, 'x', 'strings'))->leftover($first),
            'another variable is not reported'
        );
    }

    public function testUnsafeBeforeAndAfterLeaveTheBlockWholeAndReportIt(): void
    {
        $index = self::index([
            ['divi/text', ['content' => ['innerContent' => self::desktop(self::ref(self::CLAIM, ['before' => '<b>']))]]],
            ['divi/text', ['content' => ['innerContent' => self::desktop(
                // Built by hand: VariableRef::serialize() itself refuses a marker in the settings.
                '$variable(' . Json::encode(['type' => 'content', 'value' => [
                    'name' => self::CLAIM, 'settings' => ['after' => 'a $variable(b']
                ]]) . ')$'
            )]]],
            ['divi/text', ['content' => ['innerContent' => self::desktop(self::ref(self::CLAIM, ['before' => '<b>']))]]],
        ]);
        $strict = new VariableDetachRewrite(self::CLAIM, 'x', 'strings');
        $allowed = new VariableDetachRewrite(self::CLAIM, 'x', 'strings', true);

        self::assertNull($strict->rewrite(self::node($index, 'm0')));
        self::assertStringContainsString('Markup', (string) $strict->leftover(self::node($index, 'm0')));
        self::assertNull($allowed->rewrite(self::node($index, 'm1')), 'a marker is never inlined');
        self::assertNotNull($allowed->leftover(self::node($index, 'm1')));
        $third = self::node($index, 'm2');
        $attrs = (array) $allowed->rewrite($third);
        self::assertSame('<b>x', $attrs['content']['innerContent']['desktop']['value'] ?? null);
        $third->setAttrs($attrs);
        self::assertNull($allowed->leftover($third));
    }

    public function testInstancesThatMentionTheIdConcernTheRewrite(): void
    {
        $index = self::index([
            ['divi/global-layout', ['globalModule' => '1058', 'blockName' => 'divi/text', 'localAttrs' => [
                'content' => ['innerContent' => self::desktop(self::ref(self::RADIUS))],
            ]]],
            ['divi/global-layout', ['globalModule' => '1059', 'blockName' => 'divi/text']],
        ]);
        $rewrite = new VariableDetachRewrite(self::RADIUS, '8px', 'numbers');

        self::assertTrue($rewrite->concernsInstance(self::node($index, 'g0')));
        self::assertFalse($rewrite->concernsInstance(self::node($index, 'g1')));
    }
}