<?php

declare(strict_types=1);

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

use LIT\MCP\Integrations\Divi\Schema\AttrPathIndex;
use LIT\MCP\Integrations\Divi\Schema\ModuleCatalog;
use LIT\MCP\Integrations\Divi\Schema\ShortformMap;
use PHPUnit\Framework\TestCase;

final class ModuleCatalogTest extends TestCase
{
    /** Real Divi 5.2.1 metadata (tests/Integration/divi-metadata-fixture.php). */
    public static function sampleCatalog(): ModuleCatalog
    {
        $sample = json_decode(
            (string) file_get_contents(dirname(__DIR__, 4) . '/Fixtures/divi/metadata-sample.json'),
            true
        );

        return new ModuleCatalog(
            $sample['metadata'],
            static fn (string $name): array => (array) ($sample['defaults'][$name] ?? [])
        );
    }

    public function testKnowsModulesTitlesCategoriesAndChildren(): void
    {
        $catalog = self::sampleCatalog();

        self::assertTrue($catalog->has('divi/button'));
        self::assertFalse($catalog->has('button'));
        self::assertSame('divi/button', ModuleCatalog::normalize(' Button '));
        self::assertSame('divi/accordion-item', ModuleCatalog::normalize('divi/accordion-item'));
        self::assertSame('structure', $catalog->category('divi/section'));
        self::assertSame(['divi/accordion-item'], $catalog->childrenOf('divi/accordion'));
        self::assertSame(['divi/column'], $catalog->childrenOf('divi/row'));
        self::assertContains(
            ['name' => 'divi/heading', 'title' => 'Heading', 'category' => 'module', 'children' => []],
            $catalog->summary()
        );
    }

    public function testDerivesAttributePathsFromSettingsAndDefaults(): void
    {
        $catalog = self::sampleCatalog();

        foreach (
            [
                'button.innerContent', 'button.decoration.button', 'button.decoration.background',
                'module.advanced.alignment', 'module.decoration.spacing', 'module.meta.adminLabel',
                'module.advanced.text.text',
            ] as $path
        ) {
            self::assertTrue($catalog->isKnownPath('divi/button', $path), $path);
        }

        self::assertTrue($catalog->isKnownPath('divi/heading', 'title.decoration.font.font'));
        self::assertFalse($catalog->isKnownPath('divi/heading', 'title.decoration.font'));
        self::assertTrue($catalog->isKnownPath('divi/text', 'content.decoration.bodyFont.body.font'));
        self::assertTrue($catalog->isKnownPath('divi/accordion-item', 'module.advanced.open'));
        self::assertTrue($catalog->isKnownPath('divi/column', 'module.decoration.sizing'));
        self::assertFalse($catalog->isKnownPath('divi/button', 'button.innerContent.text'));
        self::assertSame('title.decoration.font.font', $catalog->suggestions('divi/heading', 'title.decoration.fnt.font')[0]);
    }

    public function testPathIndexFromHandwrittenMetadata(): void
    {
        $paths = AttrPathIndex::paths(
            [
                'title' => ['settings' => [
                    'innerContent' => ['groupType' => 'group-item', 'item' => ['attrName' => 'title.innerContent']],
                    'decoration' => ['font' => [], 'groupType' => 'x'],
                ]],
                'module' => ['settings' => [
                    'meta' => ['meta' => []],
                    'advanced' => ['text' => ['item' => ['attrName' => 'module.advanced.alignment']]],
                ]],
            ],
            ['module' => ['advanced' => ['open' => ['desktop' => ['value' => 'off']]]], 'builderVersion' => '5']
        );

        self::assertSame(
            [
                'module.advanced.alignment', 'module.advanced.open', 'module.advanced.text.text',
                'module.advanced.text.textShadow', 'module.meta.adminLabel', 'title.decoration.font.font',
                'title.decoration.font.textShadow', 'title.innerContent',
            ],
            $paths
        );
    }

    public function testEveryShortformPathIsKnownForTheSampledModules(): void
    {
        $catalog = self::sampleCatalog();
        foreach (['text', 'heading', 'button', 'image', 'blurb', 'code', 'accordion-item'] as $type) {
            foreach (ShortformMap::fields($type) as $field => $spec) {
                self::assertTrue(
                    $catalog->isKnownPath('divi/' . $type, $spec['path']),
                    sprintf('%s.%s → %s', $type, $field, $spec['path'])
                );
            }
        }
    }

    public function testShortformTableIsConsistent(): void
    {
        $kinds = ['text', 'html', 'code', 'url', 'media', 'enum', 'onoff', 'level', 'number', 'ids', 'color'];
        foreach (ShortformMap::types() as $type) {
            $fields = ShortformMap::fields($type);
            $primary = ShortformMap::primary($type);
            self::assertTrue($primary === null || isset($fields[$primary]), $type . ' primary');
            $child = ShortformMap::childType($type);
            self::assertTrue($child === null || ShortformMap::has($child), $type . ' child');
            foreach ($fields as $field => $spec) {
                self::assertContains($spec['kind'], $kinds, $type . '.' . $field);
                self::assertSame(1, preg_match('/^[a-zA-Z]+(\.[a-zA-Z]+)+$/', $spec['path']), $type . '.' . $field);
                self::assertSame($spec['kind'] === 'media', isset($spec['keys']), $type . '.' . $field);
                self::assertSame($spec['kind'] === 'enum', isset($spec['values']), $type . '.' . $field);
            }
        }

        self::assertSame(
            ['text' => 'Termin', 'url' => '/kontakt'],
            ShortformMap::values('button', ['button' => ['innerContent' => ['desktop' => ['value' => [
                'text' => 'Termin', 'linkUrl' => '/kontakt',
            ]]]]])
        );
    }

    public function testDerivesAttributePathKindsFromComponentMetadataWherePossible(): void
    {
        $catalog = self::sampleCatalog();

        self::assertSame('richtext', $catalog->pathKind('divi/text', 'content.innerContent'));
        self::assertSame('text', $catalog->pathKind('divi/heading', 'title.innerContent'));
        self::assertSame('code', $catalog->pathKind('divi/code', 'content.innerContent'));
        self::assertSame('text', $catalog->pathKind('divi/button', 'module.meta.adminLabel'));
        // Structural/style groups (fonts, backgrounds, …) carry no single scalar component in
        // Divi's metadata; 2b falls back to key-name routing for them (spec §5.6, ruling R3).
        self::assertSame('unknown', $catalog->pathKind('divi/button', 'button.decoration.background'));
        self::assertSame('unknown', $catalog->pathKind('divi/button', 'no.such.path'));
        // divi/image has no explicit attrName for its innerContent sub-fields at all.
        self::assertSame('unknown', $catalog->pathKind('divi/image', 'image.innerContent'));

        // Every kind in the module's kinds() map is a string, keyed by a known attribute path.
        $paths = $catalog->paths('divi/heading');
        foreach ($catalog->kinds('divi/heading') as $path => $kind) {
            self::assertIsString($kind);
            self::assertContains($path, $paths);
        }
    }

    public function testLeavesCompositeAttributePathsUnknownRatherThanGuessing(): void
    {
        $catalog = self::sampleCatalog();

        // button.innerContent's only attrName-annotated node is the "link" sub-group itself
        // (component.type "group": link text + linkUrl + linkTarget), and its "text" sub-field
        // carries no attrName of its own – Divi's metadata gives no reliable subName => kind
        // map here at all, so the whole path stays unknown (never guessed).
        self::assertSame('unknown', $catalog->pathKind('divi/button', 'button.innerContent'));
        self::assertArrayNotHasKey('button.innerContent', $catalog->kinds('divi/button'));
    }

    /**
     * Composite paths (Divi groups several named sub-fields, "subName", under one attribute
     * path) resolve to a subName => kind map wherever the metadata reliably names each
     * sub-field's own component (spec §5.6, ruling F1 #1) – asking without a subName, or for
     * a subName the metadata never names (e.g. an image's auto-synced "alt"), stays unknown.
     */
    public function testDerivesPerSubNameKindsForCompositePaths(): void
    {
        $catalog = self::sampleCatalog();

        // imageIcon.innerContent (divi/blurb): useIcon (toggle), icon (icon-picker), src
        // (upload, image) each carry attrName + subName + their own field component.
        self::assertSame(
            ['useIcon' => 'onoff', 'icon' => 'icon', 'src' => 'image'],
            $catalog->kinds('divi/blurb')['imageIcon.innerContent']
        );
        self::assertSame('onoff', $catalog->pathKind('divi/blurb', 'imageIcon.innerContent', 'useIcon'));
        self::assertSame('icon', $catalog->pathKind('divi/blurb', 'imageIcon.innerContent', 'icon'));
        self::assertSame('image', $catalog->pathKind('divi/blurb', 'imageIcon.innerContent', 'src'));
        // No subName given, or one Divi's metadata never names: unknown, never guessed.
        self::assertSame('unknown', $catalog->pathKind('divi/blurb', 'imageIcon.innerContent'));
        self::assertSame('unknown', $catalog->pathKind('divi/blurb', 'imageIcon.innerContent', 'noSuchField'));

        // fullwidth-header's scrollDown.decoration.icon: show (toggle), color (color-picker),
        // size (range) – same composite pattern one level deeper.
        self::assertSame(
            ['show' => 'onoff', 'color' => 'color', 'size' => 'number'],
            $catalog->kinds('divi/fullwidth-header')['scrollDown.decoration.icon']
        );

        // buttonOne/buttonTwo.innerContent: both sub-fields use the same generic "divi/text"
        // field component, but "linkUrl" is a URL, not plain text – only Divi's own
        // features.dynamicContent.type tells them apart.
        foreach (['buttonOne', 'buttonTwo'] as $attrName) {
            self::assertSame('text', $catalog->pathKind('divi/fullwidth-header', $attrName . '.innerContent', 'text'));
            self::assertSame('url', $catalog->pathKind('divi/fullwidth-header', $attrName . '.innerContent', 'linkUrl'));
        }

        // image.innerContent only has an attrName+subName for "src" – the value actually
        // carries more keys at runtime (alt, id, titleText, synced by the upload component),
        // none of which Divi's metadata names on their own, so they stay unknown rather than
        // inheriting "image".
        self::assertSame(['src' => 'image'], $catalog->kinds('divi/fullwidth-header')['image.innerContent']);
        self::assertSame('image', $catalog->pathKind('divi/fullwidth-header', 'image.innerContent', 'src'));
        self::assertSame('unknown', $catalog->pathKind('divi/fullwidth-header', 'image.innerContent', 'alt'));
        self::assertSame('unknown', $catalog->pathKind('divi/fullwidth-header', 'image.innerContent'));

        // A plain (non-composite) path is unaffected: still a flat string, not a map.
        self::assertSame('richtext', $catalog->pathKind('divi/text', 'content.innerContent'));
        self::assertIsString($catalog->kinds('divi/text')['content.innerContent']);
    }
}