// TODO: https://github.com/hastic/hastic-grafana-app/blob/c67bd8af140105c36f24c875187929869e48e51e/src/panel/graph_panel/services/analytic_service.ts

import { API_URL } from "@/config";
import axios from 'axios';

import { getGenerator } from '@/utils';

import {
  AnalyticUnitType, AnlyticUnitConfig,
  PatternConfig, ThresholdConfig, AnomalyConfig
} from "@/types/analytic_units";
import { AnomalyHSR } from "@/types";
import { AnalyticStatus } from "@/store";

import _ from 'lodash';


const ANALYTICS_API_URL = API_URL + "analytics/";

export async function getStatus(): Promise<AnalyticStatus> {
  const uri = ANALYTICS_API_URL + `status`;
  try {
    const res = await axios.get<{ status: string }>(uri);
    const data = res.data;
    return {
      available: true,
      message: data.status
    };
  } catch (e) {
    return {
      available: false,
      message: e.message
    };
  }
}

export async function getConfig(): Promise<[AnalyticUnitType, AnlyticUnitConfig]> {
  const uri = ANALYTICS_API_URL + `config`;
  const res = await axios.get(uri);

  const data = res['data'];

  let analyticUnitType = AnalyticUnitType.ANOMALY;
  let analyticUnitConfig = undefined;
  if(data['Pattern'] !== undefined) {
    analyticUnitType = AnalyticUnitType.PATTERN;
    analyticUnitConfig = data['Pattern'] as PatternConfig
  }
  if(data['Threshold'] !== undefined) {
    analyticUnitType = AnalyticUnitType.THRESHOLD;
    analyticUnitConfig = data['Threshold'] as ThresholdConfig
  }
  if(data['Anomaly'] !== undefined) {
    analyticUnitType = AnalyticUnitType.ANOMALY;
    analyticUnitConfig = data['Anomaly'] as AnomalyConfig
  }

  if(analyticUnitConfig === undefined) {
    throw new Error("unknows config type" + _.keys(data));
  }

  return [analyticUnitType, analyticUnitConfig];
}

export async function patchConfig(patchObj: any) {
  const uri = ANALYTICS_API_URL + `config`;
  await axios.patch(uri, patchObj);
}

export function getStatusGenerator(): AsyncIterableIterator<AnalyticStatus> {
  return getGenerator<AnalyticStatus>(100, getStatus);
}


export async function getHSRAnomaly(from: number, to: number): Promise<AnomalyHSR> {
  if(from >= to) {
    throw new Error("`from` can`t be less than `to`");
  }

  const uri = ANALYTICS_API_URL + `hsr/?from=${from}&to=${to}`;
  const res = await axios.get(uri);

  const values = res["data"]["AnomalyHSR"];

  return values as AnomalyHSR;
}