// Helpers

$box-input-size: 2.5;
$box-input-border-width: 2px;
$box-input-margin-right: 1.5;
$input-state-border-width: 0.5;

@mixin range-focus {
  background-color: color('white');
  box-shadow: 0 0 0 units(2px) color($theme-focus-color);
}

@mixin range-track {
  background-color: color('base-lightest');
  border-radius: radius('pill');
  border: units(1px) solid color('base');
  cursor: pointer;
  height: units(2);
  width: 100%;
}

@mixin range-thumb {
  @include u-circle($box-input-size);
  background: color('base-lightest');
  border: none;
  box-shadow: 0 0 0 units($box-input-border-width) color('base');
  cursor: pointer;
}

@mixin range-ms-fill {
  background-color: color('base-lightest');
  border-radius: radius('pill');
  border: units(1px) solid color('base');
}

// Block input elements
.usa-fieldset,
.usa-input,
.usa-textarea,
.usa-select,
.usa-range,
.usa-form-hint {
  @include border-box-sizing;
  @include typeset(
    $theme-form-font-family,
    $theme-body-font-size,
    $theme-input-line-height
  );
}

.usa-input,
.usa-textarea,
.usa-select,
.usa-range {
  @include u-border(1px, 'base-dark');
  appearance: none;
  border-radius: 0;
  color: color('ink'); // standardize on firefox
  display: block;
  height: units(5);
  margin-top: units(1);
  max-width: units($theme-input-max-width);
  padding: units(1);
  width: 100%;

  &.usa-input-success {
    @include u-border($input-state-border-width, 'success');
  }
}

.usa-fieldset {
  border: none;
  margin: 0;
  padding: 0;
}

.usa-form-group-error {
  @include u-border-left(0.5, 'error-dark');
  margin-top: units(4);
  padding-left: units(2);
  position: relative;

  @include at-media('desktop') {
    margin-left: units(-2.5);
  }
}

.usa-input-error {
  @include u-border($input-state-border-width, 'error-dark');
}

.usa-input-error-label {
  display: block;
  font-weight: font-weight('bold');
  margin-top: 0;
}

.usa-input-error-message {
  @include u-padding-y(0.5);
  color: color('error-dark');
  display: block;
  font-weight: font-weight('bold');
}

.usa-input-label-helper {
  color: color('base');
}

.usa-input-label-required {
  color: color('error-dark');
}

.usa-label {
  display: block;
  line-height: line-height($theme-form-font-family, 2);
  margin-top: units(3);
  max-width: units($theme-input-max-width);
}

.usa-textarea {
  height: units('card');
}

.usa-select {
  @include add-background-svg('arrow-both');
  appearance: none;
  background-color: color('white');
  background-position: right units(1.5) center;
  background-size: units(1);
  padding-right: units(4);

  &::-ms-expand {
    display: none;
  }

  // Show default webkit style on select element when autofilled to show icon
  &:-webkit-autofill {
    appearance: menulist;
  }

  // Remove dotted outline from select element on focus in Firefox
  &:-moz-focusring {
    color: transparent;
    text-shadow: 0 0 0 color('black');
  }
}

.usa-legend {
  font-size: font-size($theme-form-font-family, 'xl');
  font-weight: font-weight('bold');
}

// Hint text

.usa-form-hint {
  color: color('base');
  margin-bottom: 0;
}

// Custom checkboxes

@include override-prose {
  .usa-input-list {
    @include add-list-reset;

    li {
      line-height: line-height($theme-form-font-family, $theme-input-line-height);
    }
  }
}

.usa-checkbox-input,
.usa-radio-input {
  // The actual input element is only visible to screen readers, because
  // all visual styling is done via the label.
  @include sr-only();

  .lt-ie9 & {
    border: 0;
    float: left;
    margin: units(0.5) units(0.5) 0 0;
    position: static;
    width: auto;
  }
}

.usa-checkbox-label,
.usa-radio-label {
  cursor: pointer;
  display: inherit;
  font-weight: font-weight('normal');
  margin-bottom: units(1.5);
  padding-left: units($box-input-margin-right + $box-input-size);
  position: relative;
  text-indent: units(-$box-input-margin-right - $box-input-size);
}

.usa-checkbox-label::before,
.usa-radio-label::before {
  background: color('white');
  content: '\a0';
  display: inline-block;
  left: units($box-input-border-width);
  position: relative;
  vertical-align: middle\0; // Target IE 11 and below to vertically center inputs
}

.usa-checkbox-label::before {
  @include u-square($box-input-size);
  border-radius: radius($theme-checkbox-border-radius);
}

.usa-radio-label::before {
  @include u-circle($box-input-size);
}

.usa-checkbox-label::before,
.usa-radio-label::before {
  box-shadow: 0 0 0 units($box-input-border-width) color('base');
  line-height: units($box-input-size);
  margin-right: units($box-input-margin-right);
}

.usa-checkbox-input:checked + .usa-checkbox-label::before,
.usa-radio-input:checked + .usa-radio-label::before {
  background-color: color('primary');
  box-shadow: 0 0 0 units($box-input-border-width) color('primary');
}

.usa-radio-input:checked + .usa-radio-label::before {
  box-shadow: 0 0 0 units($box-input-border-width) color('primary'), inset 0 0 0 units($box-input-border-width) color('white');
}

.usa-checkbox-input:checked + .usa-checkbox-label::before,
.usa-checkbox-input:checked:disabled + .usa-checkbox-label::before {
  @include add-background-svg('correct8');
  background-position: center center;

  @media print {
    background-image: none;
    background-color: color('white');
    content: url('#{$theme-image-path}/correct8-alt.png');
    content: url('#{$theme-image-path}/correct8-alt.svg');
    text-indent: 0;
  }
}

.usa-radio-input:focus + .usa-radio-label::before {
  @include focus-outline(null, null, null, 0.5);
}

.usa-checkbox-input:disabled + .usa-checkbox-label {
  color: color('disabled');
}

.usa-checkbox-input:focus + .usa-checkbox-label::before {
  @include focus-outline;
}

.usa-checkbox-input:disabled + .usa-checkbox-label::before,
.usa-radio-input:disabled + .usa-radio-label::before {
  background: color('disabled-light');
  box-shadow: 0 0 0 units($box-input-border-width) color('disabled');
  cursor: not-allowed;
}

// Range inputs
.usa-range {
  appearance: none;
  border: none;
  padding-left: 1px;
  width: 100%;

  &:focus {
    outline: none;

    &::-webkit-slider-thumb {
      @include range-focus;
    }

    &::-moz-range-thumb {
      @include range-focus;
    }

    &::-ms-thumb {
      @include range-focus;
    }
  }

  &::-webkit-slider-runnable-track {
    @include range-track;
  }

  &::-moz-range-track {
    @include range-track;
  }

  &::-ms-track {
    @include range-track;
  }

  &::-webkit-slider-thumb {
    @include range-thumb;
    appearance: none;
    margin-top: px-to-rem(-3px); // magic number
  }

  &::-moz-range-thumb {
    @include range-thumb;
  }

  &::-ms-thumb {
    @include range-thumb;
  }

  &::-ms-fill-lower {
    @include range-ms-fill;
  }

  &::-ms-fill-upper {
    @include range-ms-fill;
  }
}

// File input type
[type='file'] {
  border: none;
  padding-left: 0;
}

// Memorable dates

.usa-memorable-date {
  display: flex;
  [type=number] {
    -moz-appearance: textfield;

    &::-webkit-inner-spin-button {
      appearance: none;
    }

    &::-webkit-contacts-auto-fill-button {
      visibility: hidden;
      display: none !important; /* stylelint-disable-line declaration-no-important */
      pointer-events: none;
      height: 0;
      width: 0;
      margin: 0;
    }
  }
}

.usa-form-group-day,
.usa-form-group-month,
.usa-form-group-year {
  @include u-flex(auto);
  margin-right: units(2);
  width: units(6);
}

.usa-form-group-year {
  width: units(9);
}