window.addEventListener('load', function() {
  // Initialize the 2Pay.js client.
  let jsPaymentClient = new TwoPayClient('AVLRNG');

  // Define a custom JSON Style
  let style = {
    margin                 : 0,
    fontFamily             : 'sans-serif',
    fontSize               : '1rem',
    fontWeight             : '400',
    lineHeight             : '1.5',
    color                  : '#212529',
    textAlign              : 'left',
    backgroundColor        : 'pink',
    '*'                    : {
      'boxSizing': 'border-box'
    },
    '.no-gutters'          : {
      marginRight: 0,
      marginLeft : 0
    },
    '.row'                 : {
      display : 'flex',
      flexWrap: 'wrap'
    },
    '.col'                 : {
      flexBasis: '0',
      flexGrow : '1',
      maxWidth : '100%',
      padding  : '.5rem 0 .5rem 0',
      position : 'relative',
      width    : '100%'
    },
    'div'                  : {
      display: 'block'
    },
    label                  : {
      display     : 'inline-block',
      marginBottom: '.5rem',
      color       : 'green',
      fontWeight  : '900'
    },
    'input'                : {
      overflow       : 'visible',
      margin         : 0,
      fontFamily     : 'inherit',
      display        : 'block',
      width          : '100%',
      height         : 'calc(1.5em + .75rem + 2px)',
      padding        : '.375rem .75rem',
      fontSize       : '1rem',
      fontWeight     : '400',
      lineHeight     : '1.5',
      color          : 'red',
      backgroundColor: '#eee',
      backgroundClip : 'padding-box',
      border         : '1px solid #ced4da',
      borderRadius   : '.25rem',
      transition     : 'border-color .15s ease-in-out,box-shadow .15s ease-in-out'
    },
    '.card-expiration-date': {
      paddingRight: '.5rem'
    }
  };
  
  // Create the component that will hold the card fields.
  let component = jsPaymentClient.components.create('card', style);
  
  // Mount the card fields component in the desired HTML tag. This is where the iframe will be located.
  component.mount('#card-element');

  // Handle form submission.
  document.getElementById('payment-form').addEventListener('submit', (event) => {
    event.preventDefault();
    
    // Extract the Name field value
    const billingDetails = {
      name: document.querySelector('#name').value
    };

    // Call the generate method using the component as the first parameter
    // and the billing details as the second one
    jsPaymentClient.tokens.generate(component, billingDetails).then((response) => {
      console.log(response.token);
    }).catch((error) => {
      console.error(error);
    });
  });
});