const express = require('express');
const morgan = require('morgan');

const app = express();
app.use(morgan('dev'));

app.get('/sum', (req, res) => {
  const a = req.query.a
  const b = req.query.b

  res.send(`The sum of ${a} and ${b} is ${Number(a) + Number(b)}`);
})

app.get('/cipher', (req, res) => {
  const text = req.query.text
  const shift = req.query.shift

  let splitArr = text.split('')
  let shiftedArr = splitArr.map(letter => {
    let charCode = letter.charCodeAt(0)
    let shiftedCharCode = charCode + Number(shift)
    return String.fromCharCode(shiftedCharCode)
  })

  res.send(`${shiftedArr.join('')}`)
})

app.get('/lotto', (req, res) => {
  const userNumbers = req.query.number
  let match = 0;
  let winningNumbers = [];

  for (let i = 0; i < 6; i++) {
    winningNumbers.push(Math.floor((Math.random() * 20) + 1))
  }

  userNumbers.forEach(num => {
    winningNumbers.forEach(winningNum => {
      if (Number(num) === winningNum) {
        match++;
      }
    })
  })

  switch (match) {
    case 4:
      res.send('Congrats, you win a free ticket')
      break;
    case 5:
      res.send('Congrats, you win $100')
      break;
    case 6:
      res.send('Wow, unbelievable you could have won the jackpot')
      break;
    default:
      res.send('Sorry, you lose! You got ' + match + ' matches')
  }

})

app.listen(8080)