* {
  padding: 0;
  margin: 0;
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
}
body {
  height: 100vh;
  background: linear-gradient(135deg, #c3a3f1, #6414e9);
}
.wrapper {
  width: 90%;
  max-width: 34.37em;
  max-height: 90vh;
  background-color: #ffffff;
  position: absolute;
  transform: translate(-50%, -50%);
  top: 50%;
  left: 50%;
  padding: 3em;
  border-radius: 1em;
  box-shadow: 0 4em 5em rgba(27, 8, 53, 0.2);
}
.container {
  position: relative;
  width: 100%;
  height: 100%;
}
#wheel {
  max-height: inherit;
  width: inherit;
  top: 0;
  padding: 0;
}
@keyframes rotate {
  100% {
    transform: rotate(360deg);
  }
}
#spin-btn {
  position: absolute;
  transform: translate(-50%, -50%);
  top: 50%;
  left: 50%;
  height: 26%;
  width: 26%;
  border-radius: 50%;
  cursor: pointer;
  border: 0;
  background: radial-gradient(#fdcf3b 50%, #d88a40 85%);
  color: #c66e16;
  text-transform: uppercase;
  font-size: 1.8em;
  letter-spacing: 0.1em;
  font-weight: 600;
}
img {
  position: absolute;
  width: 4em;
  top: 45%;
  right: -8%;
}
#final-value {
  font-size: 1.5em;
  text-align: center;
  margin-top: 1.5em;
  color: #202020;
  font-weight: 500;
}
@media screen and (max-width: 768px) {
  .wrapper {
    font-size: 12px;
  }
  img {
    right: -5%;
  }
}

const wheel = document.getElementById("wheel");
const spinBtn = document.getElementById("spin-btn");
const finalValue = document.getElementById("final-value");
//Object that stores values of minimum and maximum angle for a value
const rotationValues = [
  { minDegree: 0, maxDegree: 30, value: 2 },
  { minDegree: 31, maxDegree: 90, value: 1 },
  { minDegree: 91, maxDegree: 150, value: 6 },
  { minDegree: 151, maxDegree: 210, value: 5 },
  { minDegree: 211, maxDegree: 270, value: 4 },
  { minDegree: 271, maxDegree: 330, value: 3 },
  { minDegree: 331, maxDegree: 360, value: 2 },
];
//Size of each piece
const data = [16, 16, 16, 16, 16, 16];
//background color for each piece
var pieColors = [
  "#8b35bc",
  "#b163da",
  "#8b35bc",
  "#b163da",
  "#8b35bc",
  "#b163da",
];
//Create chart
let myChart = new Chart(wheel, {
  //Plugin for displaying text on pie chart
  plugins: [ChartDataLabels],
  //Chart Type Pie
  type: "pie",
  data: {
    //Labels(values which are to be displayed on chart)
    labels: [1, 2, 3, 4, 5, 6],
    //Settings for dataset/pie
    datasets: [
      {
        backgroundColor: pieColors,
        data: data,
      },
    ],
  },
  options: {
    //Responsive chart
    responsive: true,
    animation: { duration: 0 },
    plugins: {
      //hide tooltip and legend
      tooltip: false,
      legend: {
        display: false,
      },
      //display labels inside pie chart
      datalabels: {
        color: "#ffffff",
        formatter: (_, context) => context.chart.data.labels[context.dataIndex],
        font: { size: 24 },
      },
    },
  },
});
//display value based on the randomAngle
const valueGenerator = (angleValue) => {
  for (let i of rotationValues) {
    //if the angleValue is between min and max then display it
    if (angleValue >= i.minDegree && angleValue <= i.maxDegree) {
      finalValue.innerHTML = `<p>Value: ${i.value}</p>`;
      spinBtn.disabled = false;
      break;
    }
  }
};

//Spinner count
let count = 0;
//100 rotations for animation and last rotation for result
let resultValue = 101;
//Start spinning
spinBtn.addEventListener("click", () => {
  spinBtn.disabled = true;
  //Empty final value
  finalValue.innerHTML = `<p>Good Luck!</p>`;
  //Generate random degrees to stop at
  let randomDegree = Math.floor(Math.random() * (355 - 0 + 1) + 0);
  //Interval for rotation animation
  let rotationInterval = window.setInterval(() => {
    //Set rotation for piechart
    /*
    Initially to make the piechart rotate faster we set resultValue to 101 so it rotates 101 degrees at a time and this reduces by 1 with every count. Eventually on last rotation we rotate by 1 degree at a time.
    */
    myChart.options.rotation = myChart.options.rotation + resultValue;
    //Update chart with new value;
    myChart.update();
    //If rotation>360 reset it back to 0
    if (myChart.options.rotation >= 360) {
      count += 1;
      resultValue -= 5;
      myChart.options.rotation = 0;
    } else if (count > 15 && myChart.options.rotation == randomDegree) {
      valueGenerator(randomDegree);
      clearInterval(rotationInterval);
      count = 0;
      resultValue = 101;
    }
  }, 10);
});