@import "govuk_publishing_components/individual_component_support";

$input-size: 40px;
$large-input-size: 50px;

@mixin large-mode {
  .gem-c-search__label {
    @include govuk-font($size: 19, $line-height: $large-input-size);
  }

  .gem-c-search__input[type="search"] {
    height: $large-input-size;
  }

  .gem-c-search__submit {
    width: $large-input-size;
    height: $large-input-size;

    .gem-c-search__icon {
      @include icon-positioning($large-input-size);
    }
  }
}

.gem-c-search {
  position: relative;
  margin-bottom: 30px;
}

.gem-c-search__label {
  @include govuk-font($size: 19, $line-height: $input-size);
  display: block;
  color: $govuk-text-colour;

  h1 {
    @include govuk-font($size: 19, $line-height: $input-size);
    margin: 0;
  }

  .js-enabled & {
    position: absolute;
    left: 2px;
    top: 2px;
    bottom: 2px;
    padding-left: govuk-spacing(3);
    z-index: 1;
    color: $govuk-secondary-text-colour;
    background: govuk-colour("white");
  }

  // match label colour with the label component colour
  // when javascript is enabled and inline_label option  is set to false
  .js-enabled .gem-c-search--separate-label & {
    color: $govuk-text-colour;
  }
}

%gem-c-search-input-focus {
  outline: $govuk-focus-width solid $govuk-focus-colour;
  // Ensure outline appears outside of the element
  outline-offset: 0;
  // Double the border by adding its width again. Use `box-shadow` for this // instead of changing `border-width`
  // Also, `outline` cannot be utilised here as it is already used for the yellow focus state.
  box-shadow: inset 0 0 0 $govuk-border-width-form-element;

  @include govuk-if-ie8 {
    // IE8 doesn't support `box-shadow` so double the border with
    // `border-width`.
    border-width: $govuk-border-width-form-element * 2;
  }
}

.gem-c-search__input[type="search"] { // overly specific to prevent some overrides from outside
  @include govuk-font($size: 19, $line-height: (28 / 19));
  margin: 0;
  width: 100%;
  height: govuk-em(40, 16);
  padding: govuk-em(6, 16);
  border: $govuk-border-width-form-element solid $govuk-input-border-colour;
  background: govuk-colour("white");
  border-radius: 0; // otherwise iphones apply an automatic border radius
  box-sizing: border-box;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  @include govuk-media-query($from: tablet) {
    height: govuk-em(40, 19);
    padding: govuk-em(6, 19);
  }

  // the .focus class is added by JS and ensures that the input remains above the label once clicked/filled in
  &:focus,
  &.focus {
    z-index: 2;
  }

  &:focus {
    @extend %gem-c-search-input-focus;
  }
}

@mixin icon-positioning($container-size) {
  $icon-dimension: 20px;
  $icon-position: ($container-size - $icon-dimension) / 2;

  display: block;
  pointer-events: none;
  position: absolute;
  height: $icon-dimension;
  width: $icon-dimension;
  top: $icon-position;
  left: $icon-position;
}

.gem-c-search__submit {
  border: 0;
  cursor: pointer;
  border-radius: 0;
  position: relative;
  padding: 0;
  width: $input-size;
  height: $input-size;
  text-indent: -5000px;
  overflow: hidden;

  .gem-c-search__icon {
    @include icon-positioning($input-size);
  }

  &:focus {
    z-index: 2;
    outline: $govuk-focus-width solid $govuk-focus-colour;
    // Ensure outline appears outside of the element
    outline-offset: 0;
    // Double the border by adding its width again. Use `box-shadow` for this // instead of changing `border-width` - this is for consistency with
    // Also, `outline` cannot be utilised
    // here as it is already used for the yellow focus state.
    box-shadow: inset 0 0 0 $govuk-border-width-form-element * 2 govuk-colour("black");

    @include govuk-if-ie8 {
      // IE8 doesn't support `box-shadow` so double the border with
      // `border-width`.
      border-width: $govuk-border-width-form-element * 2;
    }
  }

  &::-moz-focus-inner {
    border: 0;
  }
}

.gem-c-search__item-wrapper {
  display: table;
  width: 100%;
  background: govuk-colour("white");
}

// general class applied to search input and button wrapper
.gem-c-search__item {
  position: relative;
  display: table-cell;
  vertical-align: top;
}

.gem-c-search__submit-wrapper {
  width: 1%;
}

.gem-c-search--on-govuk-blue {
  .gem-c-search__label {
    color: govuk-colour("white");
  }

  .gem-c-search__input {
    border-width: 0;

    // no need for black outline as there is enough contrast
    // with the blue background
    &:focus {
      box-shadow: none;
    }
  }

  .gem-c-search__submit {
    background-color: govuk-colour("black");
    color: govuk-colour("white");

    &:hover {
      background-color: lighten(govuk-colour("black"), 5%);
    }
  }

  .js-enabled & {
    .gem-c-search__label {
      color: $govuk-secondary-text-colour;
    }
  }
}

.gem-c-search--on-white {
  .gem-c-search__submit {
    background-color: govuk-colour("blue");
    color: govuk-colour("white");

    &:hover {
      background-color: lighten(govuk-colour("blue"), 5%);
    }
  }

  .gem-c-search__input[type="search"] {
    border-right-width: 0;

    // add the border once focused
    &:focus {
      border-right-width: 2px;
    }
  }
}

.gem-c-search--no-border {
  .gem-c-search__label {
    color: govuk-colour("white");
  }

  .gem-c-search__input[type="search"] {
    border: 0;
  }

  .js-enabled & {
    .gem-c-search__label {
      color: $govuk-secondary-text-colour;
    }
  }
}

.gem-c-search--large {
  @include large-mode;
}

.gem-c-search--large-on-mobile {
  @include govuk-media-query($until: "tablet") {
    @include large-mode;
  }
}

.gem-c-search--separate-label {
  .gem-c-search__label {
    position: relative;
    top: auto;
    left: auto;
    padding-left: 0;
  }
}

.search-toggle {
  display: none;
  background-color: govuk-colour("blue");
  background-image: image-url("govuk_publishing_components/search-button.png");
  background-position: 0 50%;
  background-repeat: no-repeat;
  float: right;
  height: 30px;
  margin: -46px 0;
  overflow: hidden;
  padding: 0;
  text-indent: -5000px;
  width: 36px;
  border: 0;

  &:focus {
    border-width: 0;
    box-shadow: inset 0 0 0 4px $govuk-input-border-colour;
    outline: $govuk-focus-width solid $govuk-focus-colour;
    outline-offset: 0;
  }

  &:focus,
  &:hover {
    background-color: lighten(govuk-colour("blue"), 5%);
  }

  &.js-hidden {
    display: none;
  }

  @include govuk-device-pixel-ratio {
    background-size: 52.5px 35px;
    background-position: 100% 50%;
  }

  @include govuk-media-query($from: tablet) {
    display: none;
  }

  @include govuk-media-query($until: tablet) {
    .js-enabled & {
      display: block;
    }
  }
}