import { NextMiddlewareResult } from 'next/dist/server/web/types';
import { NextRequest, NextResponse } from 'next/server';

type Method = 'GET' | 'POST' | 'PUT' | 'DELETE' | 'PATCH' | 'OPTIONS';
type Origin = string | RegExp;
type CorsConfig = {
    origins: Origin[];
    methods?: Method[];
    headers?: string[];
    allowCredentials?: boolean;
    exposedHeaders?: string[];
    maxAge?: number;
    preflightContinue?: boolean;
    optionsSuccessStatus?: number;
};
type NextCorsMiddleware = (request: NextRequest, response?: NextResponse) => NextMiddlewareResult;
type PathMatcher = {
    startWith: string;
    additionalIncludes?: string[];
};
type PathOptions = {
    includes?: PathMatcher[];
    excludes?: PathMatcher[];
};

/**
 * CORS middleware builder
 * @param config - The CORS configuration (origins, methods, headers, etc.)
 * @param pathOptions - Path options selector (includes, excludes) to enable or disable CORS for specific paths
 * @returns The corsMiddleware function
 * @usage
 * ```ts
 * export const corsMiddleware = createCorsMiddleware(config, pathOptions);
 * ```
 */
declare const createCorsMiddleware: (config: CorsConfig, pathOptions?: PathOptions) => NextCorsMiddleware;

type CorsConfigDefaults = {
    origins: undefined;
    methods: Method[];
    headers: string[];
    allowCredentials: boolean;
    exposedHeaders: string[];
    preflightContinue: boolean;
    maxAge: number;
    optionsSuccessStatus: number;
};
/**
 * @default origins is undefined, you must specify it manually to prevent unwanted * which can be a security risk
 * @default methods is ['GET', 'POST', 'PUT', 'DELETE', 'PATCH', 'OPTIONS']
 * @default headers is ['Content-Type', 'Authorization']
 * @default allowCredentials is true
 * @default preflightContinue is false
 * @default optionsSuccessStatus is 204
 * @default exposedHeaders is []
 * @default maxAge is 1 day
 */
declare const DEFAULT_CORS_CONFIG: CorsConfigDefaults;

export { type CorsConfig, DEFAULT_CORS_CONFIG, createCorsMiddleware, createCorsMiddleware as default };