const puppeteer = require('puppeteer');
async function bestdays() {
  const browser = await puppeteer.launch({});  
  days = []
  var page = await browser.newPage();
  const args = process.argv.slice(2)
  await page.goto('https://dev.to/t/'+args[0]+'/top/year');    
  for(x = 0;x < 50;x++){
    try{
      let date1 = await page.$eval("#substories > div:nth-child("+x+") > div > div.crayons-story__top > div > div:nth-child(2) > a > time", element=> element.getAttribute("datetime"))
      const d = new Date(date1);
      let day = d.getDay();
      days.push(day)
    }
    catch{}
  }
  function getAllIndexes(arr, val) {
    var indexes = [], i = -1;
    while ((i = arr.indexOf(val, i+1)) != -1){
        indexes.push(i);
    }
    return indexes;
  }
  function max(input) {
    if (toString.call(input) !== "[object Array]")  
      return false;
    return Math.max.apply(null, input);
  }
  var indexes1 = getAllIndexes(days, 0);
  var indexes2 = getAllIndexes(days, 1);
  var indexes3 = getAllIndexes(days, 2);
  var indexes4 = getAllIndexes(days, 3);
  var indexes5 = getAllIndexes(days, 4);
  var indexes6 = getAllIndexes(days, 5);
  var indexes7 = getAllIndexes(days, 6);
  dm = [indexes1.length, indexes2.length, indexes3.length, indexes4.length, indexes5.length, indexes6.length, indexes7.length]
  dm2 = []
  weekdays = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday"]
  console.log("\n")
  console.log("Best day: "+weekdays[dm.indexOf(max(dm))]+" with "+max(dm)+" top posts from last year")
  for (j = 0; j < dm.length;j++){
    if (j != dm.indexOf(max(dm))){
      dm2.push(dm[j])
    }
    else{
      dm2[j] = 0
    }
  }
  console.log("Second best day: "+weekdays[dm2.indexOf(max(dm2))]+" with "+max(dm2)+" top posts from last year")
  dm3 = []
  for (j = 0; j < dm2.length;j++){
    if (j != dm2.indexOf(max(dm2))){
      dm3.push(dm2[j])
    }
    else{
      dm3[j] = 0
    }
  }
  console.log("Third best day: "+weekdays[dm3.indexOf(max(dm3))]+" with "+max(dm3)+" top posts from last year")
  console.log("\n")
  await page.close()
  await browser.close()
}
bestdays();