import { omit, clone, defaults } from "lodash";

import { IAbstractProvider, IAnalyticsProvider, IAppProps } from "../types";
import { getUserProps } from "../utils";
import { IndicativeAPIWebSdk as apiSdk } from "./api";
import { IIndicativeConfig, defaultIndicativeConfig } from "./types";

const api = apiSdk && new apiSdk();

export class Indicative implements IAbstractProvider, IAnalyticsProvider {
  private config: IIndicativeConfig;

  constructor(config: IIndicativeConfig) {
    this.config = defaults(clone(config), defaultIndicativeConfig);
  }

  async initialize(appProps: IAppProps): Promise<boolean> {
    const { apiKey } = this.config;

    if (!api || !apiKey) {
      return false;
    }

    const initialized = await api.initialize(apiKey);

    if (initialized) {
      api.addProperties(omit(appProps, "$once"));
    }

    return initialized;
  }

  identify(identifier: string | number, email?: string, props?: object): void {
    const { id, extra } = getUserProps(identifier, email, props);
    const { userProperty } = this.config;

    if (!api) {
      throw new Error("Indicative analytics not initialized!");
    }

    api.setUniqueID(id);
    api.addProperties({ [userProperty!]: extra }); // eslint-disable-line @typescript-eslint/no-non-null-assertion
  }

  send(event: string, data?: object): void {
    if (!api) {
      throw new Error("Indicative analytics not initialized!");
    }

    api.buildEvent(event, data);
  }
}