import axios from 'axios'
import * as  fs from 'fs'
import  { logit, logerror}  from'./logit.js'
import { DateTime } from 'luxon'
const API_URL = 'https://api.sensor.community/static/v1/data.json';	// URL to API on 'luftdaten.info'
const SAVE_NAME = 'data/aktdata.json';  // filename for actual data

let LIVE = (process.env.LIVE == "true") || true
export let statistics = {};

export const doReadfromAPI = async () => {
    logit(`LIVE = ${LIVE}`)
    let start = DateTime.now()
    let data = []
    if (LIVE) {
        logit(`Start Reading from API`)
        let body
        for(let count = 1; count <= 3; count++) {
            try {
                logit(`Try - ${count}`)
                let ret = await axios(API_URL, {timeout: 10000})
                if (ret.status != 200) {
                    continue
                }
                data = ret.data
                saveDatatoFile(SAVE_NAME, JSON.stringify(data))
                break
            } catch (e) {
                logerror(`doReadfromAPI  ${e}`)
            }
        }
    } else {
        logit('Start using data on disk')
        data = readDatafromFile(SAVE_NAME)
    }
    statistics.readInTime = start.diffNow('seconds').toObject().seconds * -1
    statistics.entries = data.length
    logit(`ReadIn-Time: ${statistics.readInTime} sec`)
    return data
}


// die Daten in eimnr Datei zwischenspeichern
function saveDatatoFile(fn, data) {
    fs.writeFileSync(fn, data)
}

// Daten wieder vom File lesen
function readDatafromFile(fn) {
    return JSON.parse(fs.readFileSync(fn))
}