//
// Copyright 2018 Google Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//

@function mdc-typography-get-global-variable_($style) {
  @if $style == "headline1" {
    @return $mdc-typography-styles-headline1;
  } @else if $style == "headline2" {
    @return $mdc-typography-styles-headline2;
  } @else if $style == "headline3" {
    @return $mdc-typography-styles-headline3;
  } @else if $style == "headline4" {
    @return $mdc-typography-styles-headline4;
  } @else if $style == "headline5" {
    @return $mdc-typography-styles-headline5;
  } @else if $style == "headline6" {
    @return $mdc-typography-styles-headline6;
  } @else if $style == "subtitle1" {
    @return $mdc-typography-styles-subtitle1;
  } @else if $style == "subtitle2" {
    @return $mdc-typography-styles-subtitle2;
  } @else if $style == "body1" {
    @return $mdc-typography-styles-body1;
  } @else if $style == "body2" {
    @return $mdc-typography-styles-body2;
  } @else if $style == "caption" {
    @return $mdc-typography-styles-caption;
  } @else if $style == "button" {
    @return $mdc-typography-styles-button;
  } @else if $style == "overline" {
    @return $mdc-typography-styles-overline;
  } @else {
    @return ();
  }
}

@function mdc-typography-set-styles_($base-styles, $scale-styles) {
  @each $style, $style-props in $scale-styles {

    // Merge base properties for all styles.
    $style-props: map-merge($base-styles, $style-props);

    // Merge global overrides onto each style.
    @if global_variable_exists(unquote("mdc-typography-styles-#{$style}")) {
      $style-props: map-merge($style-props, mdc-typography-get-global-variable_(#{$style}));
    }

    // Override original styles with new styles.
    $scale-styles: map-merge($scale-styles, (#{$style}: $style-props));
  }

  @return $scale-styles;
}

@function mdc-typography-get-letter-spacing_($tracking, $font-size) {
  @return $tracking / ($font-size * 16) * 1em;
}