/*
 * HELPER FUNCTIONS
 * some useful map functions with safe gaurds
 * https://www.sitepoint.com/extra-map-functions-sass/
 */

// adds a safe gaurd in case map is not a map
@function map-safe-get($map: (), $key: '""') {
  @return if(type-of($map) == map, map-get($map, $key), '');
}

// loops through and returns the value the key list path or the default
@function map-deep-get($map, $keys...) {
  @each $key in $keys {
    $map: map-safe-get($map, $key);
  }

  @return $map;
}

// like merge but is not losey and allows deep merging
@function map-extend($map, $maps... /*, $deep */) {
  $last: nth($maps, -1);
  $deep: $last == true;
  $max: if($deep, length($maps) - 1, length($maps));

  // Loop through all maps in $maps...
  @for $i from 1 through $max {
    // Store current map
    $current: nth($maps, $i);

    // If not in deep mode, simply merge current map with map
    @if not $deep {
      $map: map-merge($map, $current);
    } @else {
      // If in deep mode, loop through all tuples in current map
      @each $key, $value in $current {
        @if length($value) > 0 {
          // If value is a nested map and same key from map is a nested map as well
          @if type-of($value) == 'map' and type-of(map-get($map, $key)) == 'map' {
            // Recursive extend
            $value: map-extend(map-get($map, $key), $value, true);
          }

          // Merge current tuple with map
          $map: map-merge(
            $map,
            (
              $key: $value,
            )
          );
        }
      }
    }
  }

  @return $map;
}