import { FastifyPluginCallback, FastifyReply, FastifyRequest, FastifyInstance } from 'fastify'
import { CookieSerializeOptions } from '@fastify/cookie'

interface FastifyOauth2 extends FastifyPluginCallback<fastifyOauth2.FastifyOAuth2Options> {
  APPLE_CONFIGURATION: fastifyOauth2.ProviderConfiguration;
  DISCORD_CONFIGURATION: fastifyOauth2.ProviderConfiguration;
  FACEBOOK_CONFIGURATION: fastifyOauth2.ProviderConfiguration;
  GITHUB_CONFIGURATION: fastifyOauth2.ProviderConfiguration;
  GITLAB_CONFIGURATION: fastifyOauth2.ProviderConfiguration;
  LINKEDIN_CONFIGURATION: fastifyOauth2.ProviderConfiguration;
  GOOGLE_CONFIGURATION: fastifyOauth2.ProviderConfiguration;
  MICROSOFT_CONFIGURATION: fastifyOauth2.ProviderConfiguration;
  SPOTIFY_CONFIGURATION: fastifyOauth2.ProviderConfiguration;
  VKONTAKTE_CONFIGURATION: fastifyOauth2.ProviderConfiguration;
  TWITCH_CONFIGURATION: fastifyOauth2.ProviderConfiguration;
  VATSIM_CONFIGURATION: fastifyOauth2.ProviderConfiguration;
  VATSIM_DEV_CONFIGURATION: fastifyOauth2.ProviderConfiguration;
  EPIC_GAMES_CONFIGURATION: fastifyOauth2.ProviderConfiguration;
  YANDEX_CONFIGURATION: fastifyOauth2.ProviderConfiguration;
  X_CONFIGURATION: fastifyOauth2.ProviderConfiguration;
}

declare namespace fastifyOauth2 {
  export interface FastifyGenerateStateFunction {
    (this: FastifyInstance, request: FastifyRequest): Promise<string> | string
    (this: FastifyInstance, request: FastifyRequest, callback: (err: any, state: string) => void): void
  }

  export interface FastifyCheckStateFunction {
    (this: FastifyInstance, request: FastifyRequest): Promise<boolean> | boolean
    (this: FastifyInstance, request: FastifyRequest, callback: (err?: any) => void): void
  }

  export interface FastifyOAuth2Options {
    name: string;
    scope?: string[];
    credentials: Credentials;
    callbackUri: string | ((req: FastifyRequest) => string);
    callbackUriParams?: Object;
    tokenRequestParams?: Object;
    generateStateFunction?: FastifyGenerateStateFunction;
    checkStateFunction?: FastifyCheckStateFunction;
    startRedirectPath?: string;
    tags?: string[];
    schema?: object;
    cookie?: CookieSerializeOptions;
    userAgent?: string | false;
    pkce?: 'S256' | 'plain';
    discovery?: { issuer: string; }
    redirectStateCookieName?: string;
    verifierCookieName?: string;
  }

  export type TToken = 'access_token' | 'refresh_token'

  export interface Token {
    token_type: 'Bearer';
    access_token: string;
    refresh_token?: string;
    id_token?: string;
    expires_in: number;
    expires_at: Date;
  }

  export interface OAuth2Token {
    /**
         * Immutable object containing the token object provided while constructing a new access token instance.
         * This property will usually have the schema as specified by RFC6750,
         * but the exact properties may vary between authorization servers.
         */
    token: Token;

    /**
         * Determines if the current access token is definitely expired or not
         * @param expirationWindowSeconds Window of time before the actual expiration to refresh the token. Defaults to 0.
         */
    expired(expirationWindowSeconds?: number): boolean;

    /** Refresh the access token */
    refresh(params?: {}): Promise<OAuth2Token>;

    /** Revoke access or refresh token */
    revoke(tokenType: 'access_token' | 'refresh_token'): Promise<void>;

    /** Revoke both the existing access and refresh tokens */
    revokeAll(): Promise<void>;
  }

  export interface ProviderConfiguration {
    /** String used to set the host to request the tokens to. Required. */
    tokenHost: string;
    /** String path to request an access token. Default to /oauth/token. */
    tokenPath?: string | undefined;
    /** String path to revoke an access token. Default to /oauth/revoke. */
    revokePath?: string | undefined;
    /** String used to set the host to request an "authorization code". Default to the value set on auth.tokenHost. */
    authorizeHost?: string | undefined;
    /** String path to request an authorization code. Default to /oauth/authorize. */
    authorizePath?: string | undefined;
  }

  export interface Credentials {
    client: {
      /** Service registered client id. Required. */
      id: string;
      /** Service registered client secret. Required. */
      secret: string;
      /** Parameter name used to send the client secret. Default to client_secret. */
      secretParamName?: string | undefined;
      /** Parameter name used to send the client id. Default to client_id. */
      idParamName?: string | undefined;
    };
    auth?: ProviderConfiguration;
    /**
         * Used to set global options to the internal http library (wreck).
         * All options except baseUrl are allowed
         * Defaults to header.Accept = "application/json"
         */
    http?: {} | undefined;
    options?: {
      /** Format of data sent in the request body. Defaults to form. */
      bodyFormat?: 'json' | 'form' | undefined;
      /**
             * Indicates the method used to send the client.id/client.secret authorization params at the token request.
             * If set to body, the bodyFormat option will be used to format the credentials.
             * Defaults to header
             */
      authorizationMethod?: 'header' | 'body' | undefined;
    } | undefined;
  }

  export interface OAuth2Namespace {
    getAccessTokenFromAuthorizationCodeFlow(
      request: FastifyRequest,
    ): Promise<OAuth2Token>;

    getAccessTokenFromAuthorizationCodeFlow(
      request: FastifyRequest,
      reply: FastifyReply,
    ): Promise<OAuth2Token>;

    getAccessTokenFromAuthorizationCodeFlow(
      request: FastifyRequest,
      callback: (err: any, token: OAuth2Token) => void,
    ): void;

    getAccessTokenFromAuthorizationCodeFlow(
      request: FastifyRequest,
      reply: FastifyReply,
      callback: (err: any, token: OAuth2Token) => void,
    ): void;

    getNewAccessTokenUsingRefreshToken(
      refreshToken: Token,
      params: Object,
      callback: (err: any, token: OAuth2Token) => void,
    ): void;

    getNewAccessTokenUsingRefreshToken(refreshToken: Token, params: Object): Promise<OAuth2Token>;

    generateAuthorizationUri(
      request: FastifyRequest,
      reply: FastifyReply,
      callback: (err: any, uri: string) => void
    ): void

    generateAuthorizationUri(
      request: FastifyRequest,
      reply: FastifyReply,
    ): Promise<string>;

    revokeToken(
      revokeToken: Token,
      tokenType: TToken,
      httpOptions: Object | undefined,
      callback: (err: any) => void
    ): void;

    revokeToken(revokeToken: Token, tokenType: TToken, httpOptions: Object | undefined): Promise<void>;

    revokeAllToken(
      revokeToken: Token,
      httpOptions: Object | undefined,
      callback: (err: any) => void
    ): void;

    revokeAllToken(revokeToken: Token, httpOptions: Object | undefined): Promise<void>;

    userinfo(tokenSetOrToken: Token | string): Promise<Object>;

    userinfo(tokenSetOrToken: Token | string, userInfoExtraOptions: UserInfoExtraOptions | undefined): Promise<Object>;

    userinfo(tokenSetOrToken: Token | string, callback: (err: any, userinfo: Object) => void): void;

    userinfo(tokenSetOrToken: Token | string, userInfoExtraOptions: UserInfoExtraOptions | undefined, callback: (err: any, userinfo: Object) => void): void;
  }
  export type UserInfoExtraOptions = { method?: 'GET' | 'POST', via?: 'header' | 'body', params?: object }
  export const fastifyOauth2: FastifyOauth2
  export { fastifyOauth2 as default }
}

declare function fastifyOauth2 (...params: Parameters<FastifyOauth2>): ReturnType<FastifyOauth2>

export = fastifyOauth2

type UpperCaseCharacters = 'A' | 'B' | 'C' | 'D' | 'E' | 'F' | 'G' | 'H' | 'I' | 'J' | 'K' | 'L' | 'M' | 'N' | 'O' | 'P' | 'Q' | 'R' | 'S' | 'T' | 'U' | 'V' | 'W' | 'X' | 'Y' | 'Z'

declare module 'fastify' {
  interface FastifyInstance {
    // UpperCaseCharacters ensures that the name has at least one character in it + is a simple camel-case:ification
    [key: `oauth2${UpperCaseCharacters}${string}`]: fastifyOauth2.OAuth2Namespace | undefined;
  }
}