import {
  IAuthRequestBuilder,
  IAuthRequestParams,
  IAuthRequestOptions,
} from "./interfaces";

import { mapCamelCaseToUnderscore, stringifyArrayParams, formatQueryString } from "./utils";

export default class AuthRequestBuilder implements IAuthRequestBuilder {
  options: IAuthRequestOptions;
  authUri: string;

  static build(params: IAuthRequestParams) {
    const builder = new AuthRequestBuilder(params);
    return {
      builder: builder,
      googleLink: builder.getLoginUrl("google", params.options.targetLinkUri),
      twitterLink: builder.getLoginUrl("twitter", params.options.targetLinkUri),
      facebookLink: builder.getLoginUrl("facebook", params.options.targetLinkUri),
      passwordLink: builder.getLoginUrl("password", params.options.targetLinkUri),
      passwordlessLink: (email) => builder.getLoginUrl("passwordless", params.options.targetLinkUri, {
        "login_hint": email
      })
    };
  }

  constructor(params : IAuthRequestParams) {
    this.options = params.options;
    this.authUri = `${params.host}/oauth/authorize`;
  }

  buildUrl(queryObject) {
    const queryWithDefaults = {
        ...mapCamelCaseToUnderscore(stringifyArrayParams(this.options)),
        ...mapCamelCaseToUnderscore(stringifyArrayParams(queryObject)),
    };
    return `${this.authUri}?${formatQueryString(queryWithDefaults)}`;
  }

  getLoginUrl(authMethod, redirect, settings = {}) {
    const queryObject = {
      auth_method: authMethod,
      target_link_uri: redirect,
      response_type: "code",
      prompt: "login",
      ...settings,
    };

    return this.buildUrl(queryObject);
  }

  getRefreshUrl(authMethod, redirect, settings = {}) {
    const queryObject = {
        auth_method: authMethod,
        target_link_uri: redirect,
        response_type: "ajax",
      ...settings,
    };

    return this.buildUrl(queryObject);
  }

  getAccessTokenUrl() {
    const query = {
      response_type: "token id_token",
      response_mode: "ajax",
      target_link_uri: "https://www.lonelyplanet.com",
      auth_method: "none",
      nonce: "null",
    };

    return this.buildUrl(query);
  }
}