@use '../../../style/sass-utils';
@use '../../token-utils';

// The prefix used to generate the fully qualified name for tokens in this file.
$prefix: (mdc, icon-button);

// Tokens that can't be configured through Angular Material's current theming API,
// but may be in a future version of the theming API.
//
// Tokens that are available in MDC, but not used in Angular Material should be mapped to `null`.
// `null` indicates that we are intentionally choosing not to emit a slot or value for the token in
// our CSS.
@function get-unthemable-tokens() {
  @return (
    // =============================================================================================
    // = TOKENS THAT SHOULD NOT BE CUSTOMIZABLE                                                    =
    // =============================================================================================
    // Determines the size of the icon. Name is inaccurate - applies to the whole component,
    // not just the state layer.
    state-layer-size: 48px,
    // MDC's icon size applied to svg and img elements inside the component
    icon-size: 24px,
    // Only applies to :disabled icons, but Angular Components uses [disabled] since :disabled
    // wouldn't work on <a> tags.
    disabled-icon-color: black,
    // Angular version applies an opacity 1 with a color change, and this only applies with
    // :disabled anyways.
    disabled-icon-opacity: 0.38,
    // =============================================================================================
    // = TOKENS NOT USED IN ANGULAR MATERIAL                                                       =
    // =============================================================================================
    // State layer is unused
    focus-icon-color: null,
    focus-state-layer-color: null,
    focus-state-layer-opacity: null,
    hover-icon-color: null,
    hover-state-layer-color: null,
    hover-state-layer-opacity: null,
    pressed-icon-color: null,
    pressed-state-layer-color: null,
    pressed-state-layer-opacity: null,
  );
}

// Tokens that can be configured through Angular Material's color theming API.
@function get-color-tokens($config) {
  @return (
    icon-color: inherit,
  );
}

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

// Tokens that can be configured through Angular Material's density theming API.
@function get-density-tokens($config) {
  @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(token-utils.$placeholder-color-config),
      get-typography-tokens(token-utils.$placeholder-typography-config),
      get-density-tokens(token-utils.$placeholder-density-config)
  );
}