@use 'sass:meta';
@use '../tokens/m2-utils';
@use '../theming/inspection';
@use '../style/sass-utils';

// Tokens that can't be configured through Angular Material's current theming API,
// but may be in a future version of the theming API.
@function get-unthemable-tokens() {
  @return ();
}

// Tokens that can be configured through Angular Material's color theming API.
@function get-color-tokens($theme) {
  $is-dark: inspection.get-theme-type($theme) == dark;
  $base: inspection.get-theme-color($theme, foreground, base);

  // If the base is a color *type* we can use it directly in the `rgba` call below.
  // If it's anything else (e.g. a CSS variable) we fall back to using static colors
  // since we don't have a way of adjusting the opacity.
  $color: if(meta.type-of($base) == color, $base, if($is-dark, #fff, #000));

  @return (
    ripple-color: rgba($color, 0.1),
  );
}

// Tokens that can be configured through Angular Material's typography theming API.
@function get-typography-tokens($theme) {
  @return ();
}

// Tokens that can be configured through Angular Material's density theming API.
@function get-density-tokens($theme) {
  @return ();
}

// Combines the tokens generated by the above functions into a single map with placeholder values.
// This is used to create token slots.
@function get-token-slots() {
  @return sass-utils.deep-merge-all(
      get-unthemable-tokens(),
      get-color-tokens(m2-utils.$placeholder-color-config),
      get-typography-tokens(m2-utils.$placeholder-typography-config),
      get-density-tokens(m2-utils.$placeholder-density-config)
  );
}