<?php

declare(strict_types=1);

namespace app\miniapi\http;

use Webman\Http\Request;
use support\Response;
use app\miniapi\exception\ApiException;

final class ApiResponse
{
    public static function owns(Request $request): bool
    {
        return $request->path() === '/api/mini' || str_starts_with($request->path(), '/api/mini/');
    }

    public static function requestId(Request $request): string
    {
        return $request->miniRequestId ??= bin2hex(random_bytes(16));
    }

    public static function success(Request $request, mixed $data): Response
    {
        return self::make($request, 200, 0, 'ok', $data);
    }

    public static function error(Request $request, ApiException $error): Response
    {
        $response = self::make(
            $request,
            $error->status,
            $error->getCode(),
            $error->getMessage(),
            $error->fields ? ['fields' => $error->fields] : null
        );
        if (in_array($error->status, [429, 503], true) && isset($error->fields['retry_after'])) {
            $response->withHeader('Retry-After', (string) max(1, (int) $error->fields['retry_after']));
        }

        return $response;
    }

    private static function make(Request $request, int $status, int $code, string $message, mixed $data): Response
    {
        $id = self::requestId($request);

        return new Response(
            $status,
            [
                'Content-Type' => 'application/json; charset=utf-8',
                'Cache-Control' => 'no-store',
                'X-Request-Id' => $id,
                'X-Content-Type-Options' => 'nosniff',
            ],
            json_encode([
                'code' => $code,
                'message' => $message,
                'data' => $data,
                'request_id' => $id,
            ], JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES | JSON_INVALID_UTF8_SUBSTITUTE | JSON_THROW_ON_ERROR)
        );
    }
}