@use '../core/style/elevation';
@use '../core/theming/theming';
@use 'sass:map';
@use '../core/tokens/m2-utils';
@use '../core/tokens/m3-utils';

@function get-tokens($theme) {
  $system: m2-utils.get-system($theme);
  $density-scale: theming.clamp-density(map.get($system, density-scale), -3);
  $touch-target-display: block;

  @if ($density-scale < -1) {
    $touch-target-display: none;
  }

  @return (
    base: (
      // visible-track-opacity and hidden-track-opacity:
      // The hidden and visible track represent whichever track is visible or
      // hidden in the ui. This could be the .mdc-switch__track :before or
      // :after depending on whether the switch is selected or unselected.
      //
      // The m2 slide-toggle uses transforms to hide & show the tracks while
      // the m3 slide-toggle uses opacity.
      slide-toggle-disabled-handle-opacity: 0.38,
      slide-toggle-disabled-selected-handle-opacity: 0.38,
      slide-toggle-disabled-selected-icon-opacity: 0.38,
      slide-toggle-disabled-track-opacity: 0.12,
      slide-toggle-disabled-unselected-handle-opacity: 0.38,
      slide-toggle-disabled-unselected-icon-opacity: 0.38,
      slide-toggle-disabled-unselected-track-outline-color: transparent,
      slide-toggle-disabled-unselected-track-outline-width: 1px,
      slide-toggle-handle-height: 20px,
      slide-toggle-handle-shape: 10px,
      slide-toggle-handle-width: 20px,
      slide-toggle-hidden-track-opacity: 1,
      slide-toggle-hidden-track-transition: transform 75ms 0ms cubic-bezier(0.4, 0, 0.6, 1),
      slide-toggle-pressed-handle-size: 20px,
      slide-toggle-selected-focus-state-layer-opacity: map.get($system, focus-state-layer-opacity),
      slide-toggle-selected-handle-horizontal-margin: 0,
      slide-toggle-selected-handle-size: 20px,
      slide-toggle-selected-hover-state-layer-opacity: map.get($system, hover-state-layer-opacity),
      slide-toggle-selected-icon-size: 18px,
      slide-toggle-selected-pressed-handle-horizontal-margin: 0,
      slide-toggle-selected-pressed-state-layer-opacity:
          map.get($system, pressed-state-layer-opacity),
      slide-toggle-selected-track-outline-color: transparent,
      slide-toggle-selected-track-outline-width: 1px,
      slide-toggle-selected-with-icon-handle-horizontal-margin: 0,
      slide-toggle-track-height: 14px,
      slide-toggle-track-outline-color: transparent,
      slide-toggle-track-outline-width: 1px,
      slide-toggle-track-shape: 7px,
      slide-toggle-track-width: 36px,
      slide-toggle-unselected-focus-state-layer-opacity:
          map.get($system, focus-state-layer-opacity),
      slide-toggle-unselected-handle-horizontal-margin: 0,
      slide-toggle-unselected-handle-size: 20px,
      slide-toggle-unselected-hover-state-layer-opacity:
          map.get($system, focus-state-layer-opacity),
      slide-toggle-unselected-icon-size: 18px,
      slide-toggle-unselected-pressed-handle-horizontal-margin: 0,
      slide-toggle-unselected-pressed-state-layer-opacity: 0.1,
      slide-toggle-unselected-with-icon-handle-horizontal-margin: 0,
      slide-toggle-visible-track-opacity: 1,
      slide-toggle-visible-track-transition: transform 75ms 0ms cubic-bezier(0, 0, 0.2, 1),
      slide-toggle-with-icon-handle-size: 20px,
      slide-toggle-touch-target-size: 48px,
    ),
    color: map.merge(private-get-color-palette-color-tokens($theme, primary), (
      slide-toggle-disabled-label-text-color:
          m3-utils.color-with-opacity(map.get($system, on-surface), 38%),
      slide-toggle-disabled-handle-elevation-shadow: elevation.get-box-shadow(0),
      slide-toggle-disabled-selected-handle-color: map.get($system, on-surface),
      slide-toggle-disabled-selected-track-color: map.get($system, on-surface),
      slide-toggle-disabled-unselected-handle-color: map.get($system, on-surface),
      slide-toggle-disabled-unselected-icon-color: map.get($system, surface-variant),
      slide-toggle-disabled-unselected-track-color: map.get($system, on-surface),
      slide-toggle-handle-elevation-shadow: elevation.get-box-shadow(1),
      slide-toggle-handle-surface-color: map.get($system, surface),
      slide-toggle-label-text-color: map.get($system, on-surface),
      slide-toggle-unselected-hover-handle-color: map.get($system, inverse-surface),
      slide-toggle-unselected-focus-handle-color: map.get($system, inverse-surface),
      slide-toggle-unselected-focus-state-layer-color: map.get($system, on-surface),
      slide-toggle-unselected-focus-track-color: map.get($system, outline),
      slide-toggle-unselected-icon-color: map.get($system, surface-variant),
      slide-toggle-unselected-handle-color: map.get($system, on-surface-variant),
      slide-toggle-unselected-hover-state-layer-color: map.get($system, on-surface),
      slide-toggle-unselected-hover-track-color: map.get($system, outline),
      slide-toggle-unselected-pressed-handle-color: map.get($system, inverse-surface),
      slide-toggle-unselected-pressed-track-color: map.get($system, outline),
      slide-toggle-unselected-pressed-state-layer-color: map.get($system, on-surface),
      slide-toggle-unselected-track-color: map.get($system, outline))
    ),
    typography: (
      slide-toggle-label-text-font: map.get($system, body-medium-font),
      slide-toggle-label-text-line-height: map.get($system, body-medium-line-height),
      slide-toggle-label-text-size: map.get($system, body-medium-size),
      slide-toggle-label-text-tracking: map.get($system, body-medium-tracking),
      slide-toggle-label-text-weight: map.get($system, body-medium-weight)
    ),
    density: (
      slide-toggle-state-layer-size: map.get((
        0: 40px,
        -1: 36px,
        -2: 32px,
        -3: 28px,
      ), $density-scale),
      slide-toggle-touch-target-display: $touch-target-display
    ),
  );
}

// Generates the mapping for the properties that change based on the slide toggle color.
@function private-get-color-palette-color-tokens($theme, $color-variant) {
  $system: m2-utils.get-system($theme);
  $system: m3-utils.replace-colors-with-variant($system, primary, $color-variant);

  @return (
    slide-toggle-selected-icon-color: map.get($system, on-primary),
    slide-toggle-disabled-selected-icon-color: map.get($system, on-primary),
    slide-toggle-selected-focus-state-layer-color: map.get($system, primary),
    slide-toggle-selected-handle-color: map.get($system, primary),
    slide-toggle-selected-hover-state-layer-color: map.get($system, primary),
    slide-toggle-selected-pressed-state-layer-color: map.get($system, primary),
    slide-toggle-selected-focus-handle-color: map.get($system, primary),
    slide-toggle-selected-hover-handle-color: map.get($system, primary),
    slide-toggle-selected-pressed-handle-color: map.get($system, primary),
    slide-toggle-selected-focus-track-color: map.get($system, inverse-primary),
    slide-toggle-selected-hover-track-color: map.get($system, inverse-primary),
    slide-toggle-selected-pressed-track-color: map.get($system, inverse-primary),
    slide-toggle-selected-track-color: map.get($system, inverse-primary),
  );
}
