@use 'sass:map';
@use 'sass:list';
@use '../core/tokens/m3-utils';
@use '../core/theming/theming';
@use '../core/theming/inspection';
@use '../core/tokens/m3';

// The prefix used to generate the fully qualified name for tokens in this file.
$prefix: (mat, stepper);

/// Generates custom tokens for the mat-stepper.
/// @param {String} $color-variant The color variant to use for the component
@function get-tokens($theme: m3.$sys-theme, $color-variant: null) {
  $system: m3-utils.get-system($theme);
  @if $color-variant {
    $system: m3-utils.replace-colors-with-variant($system, primary, $color-variant);
  }

  @return (
    base: (
      stepper-header-error-state-icon-background-color: transparent,
      stepper-header-focus-state-layer-shape: map.get($system, corner-medium),
      stepper-header-hover-state-layer-shape: map.get($system, corner-medium),
    ),
    color: (
      stepper-container-color: map.get($system, surface),
      stepper-header-done-state-icon-background-color: map.get($system, primary),
      stepper-header-done-state-icon-foreground-color: map.get($system, on-primary),
      stepper-header-edit-state-icon-background-color: map.get($system, primary),
      stepper-header-edit-state-icon-foreground-color: map.get($system, on-primary),
      stepper-header-error-state-icon-foreground-color: map.get($system, error),
      stepper-header-error-state-label-text-color: map.get($system, error),
      stepper-header-focus-state-layer-color: m3-utils.color-with-opacity(
          map.get($system, inverse-surface), map.get($system, focus-state-layer-opacity)),
      stepper-header-hover-state-layer-color: m3-utils.color-with-opacity(
          map.get($system, inverse-surface), map.get($system, hover-state-layer-opacity)),
      stepper-header-icon-background-color: map.get($system, on-surface-variant),
      stepper-header-icon-foreground-color: map.get($system, surface),
      stepper-header-label-text-color: map.get($system, on-surface-variant),
      stepper-header-optional-label-text-color: map.get($system, on-surface-variant),
      stepper-header-selected-state-icon-background-color: map.get($system, primary),
      stepper-header-selected-state-icon-foreground-color: map.get($system, on-primary),
      stepper-header-selected-state-label-text-color: map.get($system, on-surface-variant),
      stepper-line-color: map.get($system, outline),
    ),
    typography: (
      stepper-container-text-font: map.get($system, body-medium-font),
      stepper-header-label-text-font: map.get($system, title-small-font),
      stepper-header-label-text-size: map.get($system, title-small-size),
      stepper-header-label-text-weight: map.get($system, title-small-weight),
      stepper-header-error-state-label-text-size: map.get($system, title-small-size),
      stepper-header-selected-state-label-text-size: map.get($system, title-small-size),
      stepper-header-selected-state-label-text-weight: map.get($system, title-small-weight),
    ),
    density: get-density-tokens(map.get($theme, inspection.$internals, density-scale)),
  );
}

// Tokens that can be configured through Angular Material's density theming API.
@function get-density-tokens($scale) {
  $scale: theming.clamp-density(scale, -4);
  $index: ($scale * -1) + 1;

  @return (
    stepper-header-height: list.nth((72px, 68px, 64px, 60px, 42px), $index),
  );
}