const fs = require('fs');

const chartStartDt = 1601524800; // 2020-10-01T04:00:00.000Z
const chartEndDt = 1617249600; // moment(chartStartDt * 1000).add(6, 'months').valueOf() / 1000;

function getRandomArbitrary(min, max) {
    return Math.floor(Math.random() * (max - min) + min);
}

function addMoredays(StartTickTime, timePeriod, offset = 0) {
    let lastTick = StartTickTime;
    const moreTicks = []
    if(timePeriod === '6M') {
        lastTick = chartEndDt // got using moment(endTick).subtrack(6, "months").valueOf()
    }
    let currentTime = StartTickTime + offset;
    while(currentTime <= (lastTick + offset)){
        moreTicks.push({
            "time": currentTime,
            "close": getRandomArbitrary(4100, 4800),
            "volume": getRandomArbitrary(200011089, 559999999)
        })
        currentTime = currentTime + 60*60*24
    }
    return moreTicks
}

const writeToFile = async ({result, fileName}) => {
    try {
        await fs.promises.writeFile(fileName, JSON.stringify(result, null, 4), 'utf8');
        console.log('data is written successfully in the file')
    }
    catch (err) {
        console.log('not able to write data in the file ')
    }
    
}

const pleaseGenerateChartData = async (intervalStartPoint) => {
    const ticks =[]
    // const prevOffset = (60*60*24*29 + 60*60*13 )
    // const offsetBy6Days = 60*60*24*6
    const modified_ticks= addMoredays(intervalStartPoint, '6M')
    console.log(modified_ticks.length)
    console.log(modified_ticks[0])
    console.log(modified_ticks[modified_ticks.length - 1])
    const result = {
        "result": {
            "spx:ind": {
                "historical": true,
                "ticksType": "DayTick",
                "ticks": modified_ticks,
                "low": "4000.04",
                "high": "5079.95",
                "first": modified_ticks[0].time,
                "last": modified_ticks[modified_ticks.length -1].time,
                "security": {
                    "open": "4311.73",
                    "prevClose": "4079.95",
                    "ticker": "spx:ind"
                },
                "hasVolume": true
            }
        }
    }
    await writeToFile({result, fileName: './generated_data.json'})
}

pleaseGenerateChartData(chartStartDt)