<?php

declare(strict_types=1);

namespace app\controller;

use OpenApi\Annotations as OA;
use support\Response;
use WebmanTech\Swagger\Controller\RequiredElementsAttributes\PathItem\OpenapiSpec;
use WebmanTech\Swagger\DTO\ConfigOpenapiDocDTO;
use WebmanTech\Swagger\DTO\ConfigSwaggerUiDTO;
use WebmanTech\Swagger\Helper\JsExpression;
use WebmanTech\Swagger\Integrations\Response as SwaggerResponse;
use WebmanTech\Swagger\Overwrite\Generator;

final class OpenApiController
{
    private readonly array $requiredElements;

    public function __construct()
    {
        $this->requiredElements = [
            'info' => __DIR__ . '/../../vendor/webman-tech/swagger/src/Controller/RequiredElementsAttributes/Info',
            'pathItem' => __DIR__ . '/../../vendor/webman-tech/swagger/src/Controller/RequiredElementsAttributes/PathItem',
        ];
    }

    public function index(string $documentUrl): Response
    {
        $config = ConfigSwaggerUiDTO::fromConfig([
            'data' => [
                'ui_config' => [
                    'url' => new JsExpression(json_encode($documentUrl, JSON_THROW_ON_ERROR)),
                ],
            ],
        ]);

        return SwaggerResponse::create()->renderView($config->view, $config->data, $config->view_path);
    }

    public function document(array $openapiDocConfig): Response
    {
        $config = ConfigOpenapiDocDTO::fromConfig($openapiDocConfig);

        $generator = (new Generator($config))->init();
        $config->applyGenerator($generator);

        $openapi = $generator->generate(
            [$this->requiredElements, $config->getScanSources()],
            validate: false,
        );
        if ($openapi === null) {
            throw new \RuntimeException('OpenAPI document generation failed.');
        }
        if (count($openapi->paths) > 1) {
            $openapi->paths = array_filter(
                $openapi->paths,
                static fn (OA\PathItem $pathItem): bool => $pathItem->path !== OpenapiSpec::EXAMPLE_PATH,
            );
        }
        if ($config->openapi_validate) {
            $openapi->validate();
        }

        $config->applyModify($openapi);
        [$content, $contentType] = $config->generateWithFormat($openapi);

        return new Response(200, [
            'Content-Type' => $contentType,
        ], $content);
    }
}