@use "../functions" as *;
@use "../mixins/focus-ring" as *;
@use "../mixins/tokens" as *;
@use "../mixins/transition" as *;

// stylelint-disable custom-property-no-missing-var-function
$radio-tokens: () !default;

// scss-docs-start radio-tokens
// stylelint-disable-next-line scss/dollar-variable-default
$radio-tokens: defaults(
  (
    --radio-size: 1.25rem,
    --radio-margin-block: .125rem,
    --radio-bg: var(--bg-body),
    --radio-border-color: var(--border-color),
    --radio-checked-bg: var(--control-checked-bg),
    --radio-checked-border-color: var(--control-checked-border-color),
    --radio-disabled-bg: var(--control-disabled-bg),
    --radio-disabled-opacity: var(--control-disabled-opacity),
  ),
  $radio-tokens
);
// scss-docs-end radio-tokens
// stylelint-enable custom-property-no-missing-var-function

@layer forms {
  .radio {
    @include tokens($radio-tokens);

    position: relative;
    flex-shrink: 0;
    width: var(--radio-size);
    height: var(--radio-size);
    margin-block: var(--radio-margin-block);
    appearance: none;
    background-color: var(--theme-bg, var(--radio-bg));
    border: 1px solid var(--theme-bg, var(--radio-border-color));
    // stylelint-disable-next-line property-disallowed-list
    border-radius: 50%;
    // `color` is transitioned because the dot paints with `currentcolor`; without
    // it the dot would snap to the body color as it fades out on uncheck.
    @include transition(
      color var(--control-transition-duration) var(--control-transition-timing),
      background-color var(--control-transition-duration) var(--control-transition-timing),
      border-color var(--control-transition-duration) var(--control-transition-timing)
    );

    // Inner dot: always present but scaled/faded out until checked so it pops in.
    &::before {
      position: absolute;
      inset: calc(var(--radio-size) * .25);
      content: "";
      background-color: currentcolor;
      // stylelint-disable-next-line property-disallowed-list
      border-radius: 50%;
      opacity: 0;
      transform: scale(0);
      @include transition(
        opacity var(--control-transition-duration) var(--control-transition-timing),
        transform var(--control-transition-duration) var(--control-transition-timing)
      );
    }

    &:checked {
      color: var(--theme-contrast, var(--primary-contrast));
      background-color: var(--theme-bg, var(--radio-checked-bg));
      border-color: var(--theme-bg, var(--radio-checked-border-color));

      &::before {
        opacity: 1;
        transform: scale(1);
      }
    }

    &:disabled {
      --radio-bg: var(--radio-disabled-bg);

      ~ label {
        color: var(--secondary-fg);
        cursor: default;
      }
    }
    &:disabled:checked {
      opacity: var(--radio-disabled-opacity);
    }

    &:focus-visible {
      @include focus-ring(true);
    }
  }

  .radio-sm {
    --radio-size: 1rem;

    + label {
      font-size: var(--font-size-sm);
    }
  }
  .radio-lg {
    --radio-size: 1.5rem;
    --radio-margin-block: .375rem;

    + label {
      font-size: var(--font-size-lg);
    }
  }
}