//
// Copyright IBM Corp. 2018, 2018
//
// This source code is licensed under the Apache-2.0 license found in the
// LICENSE file in the root directory of this source tree.
//

@import 'breakpoint';
@import 'utilities';

/// Get the column width for a given breakpoint
/// @param {String} $breakpoint
/// @param {Map} $breakpoints [$carbon--grid-breakpoints]
/// @return {Number} In rem
/// @access public
/// @group @carbon/layout
@function carbon--get-column-width(
  $breakpoint,
  $breakpoints: $carbon--grid-breakpoints
) {
  @if map-has-key($breakpoints, $breakpoint) {
    $values: map-get($breakpoints, $breakpoint);
    $width: map-get($values, width);
    $margin: map-get($values, margin);
    $columns: map-get($values, columns);

    @return ($width - (2 * $margin)) / $columns;
  } @else {
    @warn 'Breakpoint: `#{$breakpoint}` is not a valid breakpoint.';
  }
}

/// @type Map
/// @access public
/// @group @carbon/layout
$carbon--key-height-scales: (
  sm: (
    carbon--get-column-width(sm),
    carbon--get-column-width(sm) * 2,
    carbon--get-column-width(sm) * 3,
    carbon--get-column-width(sm) * 4,
    carbon--get-column-width(sm) * 5,
    carbon--get-column-width(sm) * 6,
  ),
  md: (
    carbon--get-column-width(md),
    carbon--get-column-width(md) * 2,
    carbon--get-column-width(md) * 3,
    carbon--get-column-width(md) * 4,
    carbon--get-column-width(md) * 5,
    carbon--get-column-width(md) * 6,
  ),
  lg: (
    carbon--get-column-width(lg),
    carbon--get-column-width(lg) * 2,
    carbon--get-column-width(lg) * 3,
    carbon--get-column-width(lg) * 4,
    carbon--get-column-width(lg) * 5,
    carbon--get-column-width(lg) * 6,
    carbon--get-column-width(lg) * 7,
    carbon--get-column-width(lg) * 8,
  ),
  xlg: (
    carbon--get-column-width(xlg),
    carbon--get-column-width(xlg) * 2,
    carbon--get-column-width(xlg) * 3,
    carbon--get-column-width(xlg) * 4,
    carbon--get-column-width(xlg) * 5,
    carbon--get-column-width(xlg) * 6,
    carbon--get-column-width(xlg) * 7,
    carbon--get-column-width(xlg) * 8,
  ),
  max: (
    carbon--get-column-width(max),
    carbon--get-column-width(max) * 2,
    carbon--get-column-width(max) * 3,
    carbon--get-column-width(max) * 4,
    carbon--get-column-width(max) * 5,
    carbon--get-column-width(max) * 6,
    carbon--get-column-width(max) * 7,
    carbon--get-column-width(max) * 8,
  ),
);

/// Get the value of a key height step at a given breakpoint
/// @param {String} $breakpoint
/// @param {Number} $step
/// @return {Number} In rem
/// @access public
/// @group @carbon/layout
@function carbon--key-height($breakpoint, $step) {
  @if map-has-key($carbon--key-height-scales, $breakpoint) {
    @return nth(map-get($carbon--key-height-scales, $breakpoint), $step);
  } @else {
    @warn 'Breakpoint: `#{$breakpoint}` is not a valid breakpoint.';
  }
}