// *** Progress bar code ***

// Define global elements
const array_of_$_triggers = $('.progress-bar_circle.hide-tablet')
const $_left_arrow = $('.stack2_arrow-cnt').find('.js-prev')
const $_right_arrow = $('.stack2_arrow-cnt').find('.js-next')
const $_slide_wrapper = $('.stack2-slides-wrapper')
// Define global strings

// Main function
function main() {
   $_left_arrow.click(() => {
       scroll_to_slide('left')
   })
   $_right_arrow.click(() => {
       scroll_to_slide('right')
   })
   
}

// Helper functions
// Scroll to slide
const inaccuracy_buffer_float = 0.055 // = xx.x %
function scroll_to_slide( direction ) {
   // Set local variables
   var slide_width = $(window).width()
   var slide_wrapper_position = parseInt( $_slide_wrapper.css('-webkit-transform').split(',')[4] ) * -1
   // Calculate
   var inaccuracy_buffer = slide_width * inaccuracy_buffer_float
   var x = this_slide_is_next( direction, slide_width, inaccuracy_buffer, slide_wrapper_position )
   
   // Scroll to slide x
   array_of_$_triggers[x].click()
       
}
// This slide is next
function this_slide_is_next( direction, width, buffer, position ) {
   
   // Logic
   var min = 0
   var max = array_of_$_triggers.length - 1
   var int = 0
   
   if ( direction == 'left' ) {
       int = Math.ceil( (position - buffer) / width )
       
       if ( int < min + 1 ) {
           int = min
       } else {
           int -= 1
       }
       
   } else if ( direction == 'right' ) {
       int = Math.floor( (position + buffer) / width )
       if ( int > max - 1 ) {
           int = max
       } else {
           int += 1
       }
       
   }
   return int
   
}

// Call main function
main()