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import { join, ky } from "./deps.ts";
/** * parametor of MiAuth url */export interface UrlParam {  name: string;  callback?: string;  permission: Array<string>;}
/** * thow when incorrect format url parametor hand over MiAuth class */class UrlParametorError extends Error {  constructor() {    // TODO: ここに気の利いたエラーを入れる    super("UrlParametorError");  }}
class AuthenticationError extends Error {  constructor() {    // TODO: ここに気の利いたエラーを入れる    super("AuthenticationError");  }}
export class MiAuth {  /**   * MiAuth constructor   *   * origin:   *   your on the instance url   *   * param:   *   url parametor. see UrlParam   */
  private origin: string;  private param: UrlParam;  private session: string;
  constructor(origin: string, param: UrlParam, session: string) {    this.origin = origin;    this.param = param;    this.session = session;  }
  /**   * return miauth authentication url   */  public authUrl(): string {    const param = this.buildParam(this.param);    const requestUrl = new URL(join("miauth", this.session), this.origin);
    requestUrl.search = param;    return requestUrl.toString();  }
  /**   * return misskey api token   * when failed authentication, thow AuthenticationError   */  public async getToken(): Promise<string> {    const url = new URL(      join("api", "miauth", this.session, "check"),      this.origin,    );
    const data: Record<string, unknown> = await ky.post(url).json();    const token = String(data.token);
    if (typeof data.token === "undefined") {      throw new AuthenticationError();    }
    return token;  }
  /**   * build for parametor of miauth authentication url   * when you incorrect parametor, thow UrlParametorError,   * but, when callback parametor incorrect do not thow that error   */  private buildParam(param: UrlParam): string {    const urlParam: Record<string, string> = {      name: param.name,      callback: param.callback as string,      permission: param.permission.join(", "),    };
    const convertdParam = new URLSearchParams();
    Object.keys(urlParam).forEach((key) => {      convertdParam.set(key, String(urlParam[key]));      if (key != "callback") {        if (typeof urlParam[key] === "undefined") {          throw UrlParametorError;        }      } else {        if (typeof urlParam[key] === "undefined") {          convertdParam.delete("callback");        }      }    });    return convertdParam.toString();  }}
/** *  this is MiAuth constructor light wrapper */export function quickAuth(origin: string, param: UrlParam): MiAuth {  const session = crypto.randomUUID();  return new MiAuth(origin, param, session);}