@use 'sass:map';
@use 'sass:math';
@use '@material/density/functions' as mdc-density-functions;
@use '@material/icon-button/icon-button-theme' as mdc-icon-button-theme;
@use '../core/tokens/m2/mdc/icon-button' as tokens-mdc-icon-button;
@use '../core/tokens/m2/mat/icon-button' as tokens-mat-icon-button;
@use '../core/style/sass-utils';
@use '../core/tokens/token-utils';
@use '../core/theming/theming';
@use '../core/theming/inspection';
@use '../core/theming/validation';


@mixin base($theme) {
  @if inspection.get-theme-version($theme) == 1 {
    @include _theme-from-tokens(inspection.get-theme-tokens($theme, base));
  }
  @else {
    // Add default values for tokens not related to color, typography, or density.
    @include sass-utils.current-selector-or-root() {
      @include mdc-icon-button-theme.theme(tokens-mdc-icon-button.get-unthemable-tokens());
    }
  }
}

@mixin _icon-button-variant($theme, $palette) {
  $mdc-tokens: if($palette,
    tokens-mdc-icon-button.private-get-color-palette-color-tokens($theme, $palette),
    tokens-mdc-icon-button.get-color-tokens($theme)
  );

  $mat-tokens: if($palette,
    tokens-mat-icon-button.private-get-color-palette-color-tokens($theme, $palette),
    tokens-mat-icon-button.get-color-tokens($theme)
  );

  @include mdc-icon-button-theme.theme($mdc-tokens);
  @include token-utils.create-token-values(tokens-mat-icon-button.$prefix, $mat-tokens);
}

@mixin color($theme) {
  @if inspection.get-theme-version($theme) == 1 {
    @include _theme-from-tokens(inspection.get-theme-tokens($theme, color));
  }
  @else {
    @include sass-utils.current-selector-or-root() {
      @include _icon-button-variant($theme, null);

      .mat-mdc-icon-button {
        &.mat-primary {
          @include _icon-button-variant($theme, primary);
        }

        &.mat-accent {
          @include _icon-button-variant($theme, accent);
        }

        &.mat-warn {
          @include _icon-button-variant($theme, warn);
        }
      }
    }
  }
}

@mixin typography($theme) {
  @if inspection.get-theme-version($theme) == 1 {
    @include _theme-from-tokens(inspection.get-theme-tokens($theme, typography));
  }
  @else {
    @include sass-utils.current-selector-or-root() {
      @include token-utils.create-token-values(tokens-mat-icon-button.$prefix,
        tokens-mat-icon-button.get-typography-tokens($theme));
    }
  }
}

@mixin density($theme) {
  @if inspection.get-theme-version($theme) == 1 {
    @include _theme-from-tokens(inspection.get-theme-tokens($theme, density));
  }
  @else {
    $icon-size: 24px;
    $density-scale: inspection.get-theme-density($theme);
    // Manually apply the expected density theming, and include the padding
    // as it was applied before
    $calculated-size: mdc-density-functions.prop-value(
      $density-config: (
        size: (
          default: 48px,
          maximum: 48px,
          minimum: 28px,
        ),
      ),
      $density-scale: $density-scale,
      $property-name: size,
    );

    @include sass-utils.current-selector-or-root() {
      @include token-utils.create-token-values(tokens-mat-icon-button.$prefix,
        tokens-mat-icon-button.get-density-tokens($theme));
    }

    // Use `mat-mdc-button-base` to increase the specificity over the button's structural styles.
    .mat-mdc-icon-button.mat-mdc-button-base {
      // Match the styles that used to be present. This is necessary for backwards
      // compat to match the previous implementations selector count (two classes).
      @include mdc-icon-button-theme.theme((
        state-layer-size: $calculated-size,
      ));

      // TODO: Switch calculated-size to "var(--mdc-icon-button-state-layer-size)"
      // Currently fails validation because the variable is "undefined"
      // in the sass stack.
      // TODO: Switch icon-size to "var(--mdc-icon-button-icon-size)". Currently
      // fails validation because the variable is "undefined" in the sass stack.
      width: var(--mdc-icon-button-state-layer-size);
      height: var(--mdc-icon-button-state-layer-size);
      padding: math.div($calculated-size - $icon-size, 2);
    }
  }
}

@mixin theme($theme) {
  @include theming.private-check-duplicate-theme-styles($theme, 'mat-icon-button') {
    @if inspection.get-theme-version($theme) == 1 {
      @include _theme-from-tokens(inspection.get-theme-tokens($theme));
    }
    @else {
      @include base($theme);
      @if inspection.theme-has($theme, color) {
        @include color($theme);
      }
      @if inspection.theme-has($theme, density) {
        @include density($theme);
      }
      @if inspection.theme-has($theme, typography) {
        @include typography($theme);
      }
    }
  }
}

@mixin _theme-from-tokens($tokens) {
  @include validation.selector-defined(
      'Calls to Angular Material theme mixins with an M3 theme must be wrapped in a selector');
  @if ($tokens != ()) {
    @include mdc-icon-button-theme.theme(map.get($tokens, tokens-mdc-icon-button.$prefix));
    @include token-utils.create-token-values(
        tokens-mat-icon-button.$prefix, map.get($tokens, tokens-mat-icon-button.$prefix));
  }
}