<?php

declare(strict_types=1);

namespace App\Providers;

use App\Enums\Models\List\ExternalEntryWatchStatus;
use App\Enums\Models\List\ExternalProfileSite;
use App\Enums\Models\List\ExternalProfileVisibility;
use App\Enums\Models\List\PlaylistVisibility;
use App\Enums\Models\Wiki\AnimeMediaFormat;
use App\Enums\Models\Wiki\AnimeSeason;
use App\Enums\Models\Wiki\AnimeSynonymType;
use App\Enums\Models\Wiki\ImageFacet;
use App\Enums\Models\Wiki\ResourceSite;
use App\Enums\Models\Wiki\ThemeType;
use App\Enums\Models\Wiki\VideoOverlap;
use App\Enums\Models\Wiki\VideoSource;
use App\GraphQL\Definition\Types\BaseType;
use App\GraphQL\Definition\Unions\BaseUnion;
use App\GraphQL\Types\EnumType;
use Illuminate\Contracts\Events\Dispatcher;
use Illuminate\Support\Facades\Config;
use Illuminate\Support\Facades\File;
use Illuminate\Support\ServiceProvider;
use Illuminate\Support\Str;
use Nuwave\Lighthouse\Events\BuildSchemaString;
use Nuwave\Lighthouse\Schema\TypeRegistry;
use Nuwave\Lighthouse\Schema\Types\Scalars\DateTimeTz;
use RecursiveDirectoryIterator;
use RecursiveIteratorIterator;
use ReflectionClass;

/**
 * Class GraphQLServiceProvider.
 */
class GraphQLServiceProvider extends ServiceProvider
{
    /**
     * Bootstrap any application services.
     *
     * @return void
     */
    public function boot(TypeRegistry $typeRegistry): void
    {
        $this->bootModels();
        $this->bootEnums();

        $typeRegistry->register(new DateTimeTz());

        $this->bootTypes();
        $this->bootQueries();
    }

    /**
     * Boot the model namespaces so schema can find them.
     *
     * @return void
     */
    protected function bootModels(): void
    {
        $modelNamespaces = Config::get('lighthouse.namespaces.models', []);

        $modelsBasePaths = [
            'App\\Models' => app_path('Models'),
            'App\\Pivots' => app_path('Pivots'),
        ];

        foreach ($modelsBasePaths as $baseNamespace => $basePath) {
            foreach (new RecursiveIteratorIterator(new RecursiveDirectoryIterator($basePath)) as $file) {
                if ($file->isDir() || $file->getExtension() !== 'php') {
                    continue;
                }

                $relativePath = str_replace($basePath . DIRECTORY_SEPARATOR, '', $file->getPath());
                $relativeNamespace = $relativePath ? '\\' . str_replace(DIRECTORY_SEPARATOR, '\\', $relativePath) : '';

                $namespace = $baseNamespace . $relativeNamespace;

                if (!in_array($namespace, $modelNamespaces)) {
                    $modelNamespaces[] = $namespace;
                }
            }
        }

        Config::set('lighthouse.namespaces.models', $modelNamespaces);
    }

    /**
     * Register the enums to use as type.
     *
     * @return void
     */
    protected function bootEnums(): void
    {
        $typeRegistry = app(TypeRegistry::class);
        $typeRegistry->register(new EnumType(ExternalEntryWatchStatus::class));
        $typeRegistry->register(new EnumType(ExternalProfileSite::class));
        $typeRegistry->register(new EnumType(ExternalProfileVisibility::class));
        $typeRegistry->register(new EnumType(PlaylistVisibility::class));
        $typeRegistry->register(new EnumType(AnimeMediaFormat::class));
        $typeRegistry->register(new EnumType(AnimeSeason::class));
        $typeRegistry->register(new EnumType(AnimeSynonymType::class));
        $typeRegistry->register(new EnumType(ImageFacet::class));
        $typeRegistry->register(new EnumType(ResourceSite::class));
        $typeRegistry->register(new EnumType(ThemeType::class));
        $typeRegistry->register(new EnumType(VideoOverlap::class));
        $typeRegistry->register(new EnumType(VideoSource::class));
    }

    /**
     * Register the types that were made programmatically.
     *
     * @return void
     */
    protected function bootTypes(): void
    {
        $dispatcher = app(Dispatcher::class);

        $paths = [
            app_path('GraphQL/Definition/Types'),
            app_path('GraphQL/Definition/Unions'),
        ];

        foreach ($paths as $path) {
            $files = File::allFiles($path);

            foreach ($files as $file) {
                $relativePath = Str::after($file->getPathname(), app_path() . DIRECTORY_SEPARATOR);
                $class = str_replace(['/', '.php'], ['\\', ''], $relativePath);
                $fullClass = 'App\\' . $class;

                if (!class_exists($fullClass)) {
                    continue;
                }

                $reflection = new ReflectionClass($fullClass);

                if (!$reflection->isInstantiable()) {
                    continue;
                }

                /** @var BaseType|BaseUnion $class */
                $class = new $fullClass;

                $dispatcher->listen(
                    BuildSchemaString::class,
                    fn (): string => $class->mount()
                );
            }
        }
    }

    /**
     * Register the queries that were made programmatically.
     *
     * @return void
     */
    protected function bootQueries(): void
    {
        $dispatcher = app(Dispatcher::class);

        $paths = [
            app_path('GraphQL/Definition/Queries'),
        ];

        $queries = [];

        foreach ($paths as $path) {
            $files = File::allFiles($path);

            foreach ($files as $file) {
                $relativePath = Str::after($file->getPathname(), app_path() . DIRECTORY_SEPARATOR);
                $class = str_replace(['/', '.php'], ['\\', ''], $relativePath);
                $fullClass = 'App\\' . $class;

                if (!class_exists($fullClass)) {
                    continue;
                }

                $reflection = new ReflectionClass($fullClass);

                if (!$reflection->isInstantiable()) {
                    continue;
                }

                /** @var BaseType|BaseUnion $class */
                $class = new $fullClass;

                $dispatcher->listen(
                    BuildSchemaString::class,
                    fn (): string => "
                        extend type Query {
                            {$class->mount()}
                        }
                    "
                );

                $queries[] = $class->mount();
            }
        }
    }
}