// Definitions by: Jannik Keye <https://github.com/jannikkeye>

import { Server, IncomingMessage, ServerResponse } from 'http'

import fastify = require('fastify');

type originCallback = (err: Error, allow: boolean) => void;

type originFunction = (origin: string, callback: originCallback) => void;

type originType = string | boolean | RegExp;

type ValueOrArray<T> = T | ArrayOfValueOrArray<T>;

interface ArrayOfValueOrArray<T> extends Array<ValueOrArray<T>> {}

declare const fastifyCors: fastify.Plugin<Server, IncomingMessage, ServerResponse, {
    /**
     * Configures the Access-Control-Allow-Origin CORS header.
     */
    origin?: ValueOrArray<originType> | originFunction;
    /**
     * Configures the Access-Control-Allow-Credentials CORS header.
     * Set to true to pass the header, otherwise it is omitted.
     */
    credentials?: boolean;
    /**
     * Configures the Access-Control-Expose-Headers CORS header.
     * Expects a comma-delimited string (ex: 'Content-Range,X-Content-Range')
     * or an array (ex: ['Content-Range', 'X-Content-Range']).
     * If not specified, no custom headers are exposed.
     */
    exposedHeaders?: string | string[];
    /**
     * Configures the Access-Control-Allow-Headers CORS header.
     * Expects a comma-delimited string (ex: 'Content-Type,Authorization')
     * or an array (ex: ['Content-Type', 'Authorization']). If not
     * specified, defaults to reflecting the headers specified in the
     * request's Access-Control-Request-Headers header.
     */
    allowedHeaders?: string | string[];
    /**
     * Configures the Access-Control-Allow-Methods CORS header.
     * Expects a comma-delimited string (ex: 'GET,PUT,POST') or an array (ex: ['GET', 'PUT', 'POST']).
     */
    methods?: string | string[];
    /**
     * Configures the Access-Control-Max-Age CORS header.
     * Set to an integer to pass the header, otherwise it is omitted.
     */
    maxAge?: number;
    /**
     * Pass the CORS preflight response to the route handler (default: false).
     */
    preflightContinue?: boolean;
    /**
     * Provides a status code to use for successful OPTIONS requests,
     * since some legacy browsers (IE11, various SmartTVs) choke on 204.
     */
    optionsSuccessStatus?: number;
    /**
     * Pass the CORS preflight response to the route handler (default: false).
     */
    preflight?: boolean;
    /**
     * Hide options route from the documentation built using fastify-swagger (default: true).
     */
    hideOptionsRoute?: boolean;
}>;

export = fastifyCors;