////
/// @group accordion
/// Outputs accordion component stylesheet, which can be used with <details> or custom disclosure components
////

// Internal note: We don't require the content to be wrapped, this is so that this can be used on details elements outside of our control. So we use negative margins

@use "sass:map";
@use "sass:math";

@use "../selector";
@use "../utils";
@use "../color";
@use "../typography";

/// Module Settings
/// @type Map
/// @prop {Color}  background-color  [accordion-background] This is the background color of the accordion before it is expanded. 
/// @prop {Color}  background-color-open  [accordion-background-open] This is the background color of the accordion before it is expanded. This will change the background color of the accordion's summary as well as the details.
/// @prop {String} border-color ["rule"]
/// @prop {Number} border-radius  [0] This applies a rounding of edges for the accordion. If there are multiple accordions in a stack, this will only apply to the top of the first accordion and the bottom of the last accordion.
/// @prop {Dimension} border-width  [1px] The width of the borders of the accordions
/// @prop {CssValue} box-shadow  [none] Adds a box shadow to accordion container
/// @prop {Dimension} margin  [3rem] text This is the margin above and below the accordion. Multiple Accordions will stack. See margin-between below.
/// @prop {Dimension} margin-between  [0] This adds a margin between adjacent accordions. By default, accordions do not have any net margin between each other.
/// @prop {Dimension} padding-x  [1.5em] Singular value for the left and right padding
/// @prop {Dimension} padding-y  [1.5em] Singular value for the top and bottom padding
/// @prop {Color} icon-background-color  [transparent] The background color of the icon.
/// @prop {Color} icon-background-color-hover  [transparent] The background color of the icon when hovered or focused.
/// @prop {Number} icon-border-radius  [50%] The border-radius of the icon.
/// @prop {String} icon-color  [link] Color of the icon. This uses color.scss, so the value of this option should be a color variable from color.scss.
/// @prop {String} icon-color-hover  [link-hover] Color of the icon when hovered or focused on. This uses color.scss, so the value of this options should be a color variable from color.scss.
/// @prop {Dimension} icon-font-size  [1.5rem] The font-size of the icon.
/// @prop {Dimension} icon-size  [auto] The size of the icon. Used as the base in the flex property.
/// @prop {Dimension} icon-stroke-width [0.15em]
/// @prop {Color} summary-background-color  [null] The background color for the summary (toggle button) of the accordion
/// @prop {Color} summary-color  [null] The color of the text in the accordion summary.
/// @prop {Color} summary-color-hover  [null] The color of the text in the accordion summary when hovering or focusing on it.
/// @prop {Dimension} summary-line-height  [null] Adjusts the line height of the summary element.
/// @prop {Dimension} summary-padding-y  [1rem] The vertical padding of the summary.
/// @prop {Dimension} summary-type-size  [false] The size of the text in the accordion summary. 
/// @prop {Dimension} transparent-padding-y  [1em] The upper and lower padding of the transparent summary.
/// @prop {Dimension} transparent-padding-x  [0] The upper and lower padding of the transparent summary.
/// @prop {Dimension} borderless-margin-between  [0.5rem] Margin between accordions when using no-border modiifier

$config: (
  "background-color":            "background",
  "background-color-open":       white,
  "border-color":                "rule-light",
  "border-radius":               0,
  "border-width":                1px,
  "box-shadow":                  none,
  "margin":                      3rem,
  "margin-between":              0,
  "padding-x":                   1.5em,
  "padding-y":                   1.5em,
  "icon-background-color":       transparent,
  "icon-background-color-hover": transparent,
  "icon-border-radius":          50%,
  "icon-color":                  "link",
  "icon-color-hover":            "link-hover",
  "icon-font-size":              1.5rem,
  "icon-size":                   auto,
  "icon-stroke-width":           0.15em,
  "summary-background-color":    #f6f6f6,
  "summary-color":               null,
  "summary-background-color-hover": null,
  "summary-color-hover":         null,
  "summary-line-height":         null,
  "summary-padding-y":           1rem,
  "summary-type-size":           false,
  "transparent-padding-x":       0,
  "transparent-padding-y":       1em,
  "borderless-margin-between" :  0.5rem
) !default;

/// Change modules $config
/// @param {Map} $changes Map of changes
/// @example scss
///   @include ulu.component-accordion-set(( "property" : value ));

@mixin set($changes) {
  $config: map.merge($config, $changes) !global;
}

/// Get a config option
/// @param {Map} $name Name of property
/// @example scss
///   @include ulu.component-accordion-get("property");

@function get($name) {
  @return utils.require-map-get($config, $name, "accordion [config]");
}

/// Prints component styles
/// @demo accordion
/// @example scss
///  @include ulu.component-accordion-styles();

@mixin styles {
  $prefix: selector.class("accordion");
  $padding-x: get("padding-x");
  $padding-x-double: get("padding-x") * 2;
  $border: get("border-width") solid color.get(get("border-color"));

  // When not one of our custom classed details components
  #{ $prefix } {
    position: relative; // For active border
    border-radius: 0;
    padding-left: $padding-x;
    padding-right: $padding-x;
    margin-top: get("margin");
    margin-bottom: get("margin");
    border: $border;
    background-color: color.get(get("background-color"));
    box-shadow: get("box-shadow");
    &:first-of-type {
      border-top-left-radius: get("border-radius");
      border-top-right-radius: get("border-radius");
    }
    &:last-of-type {
      border-bottom-left-radius: get("border-radius");
      border-bottom-right-radius: get("border-radius");
    }
    & + & {
      $gap: -(get("margin") - get("margin-between"));
      margin-top: $gap;
      margin-top: calc($gap - get("border-width"));
    }
    &[open], 
    &.is-active  {
      background-color: color.get(get("background-color-open"));
      padding-bottom: get("padding-y");
      z-index: 2; // Above child details
      > #{ $prefix }__summary {
        margin-bottom: get("padding-y");
        border-bottom-left-radius: 0;
        border-bottom-right-radius: 0; 
        border-bottom: $border;
      }
    }
  }
  #{ $prefix }__summary {
    background-color: color.get(get("summary-background-color"));
    color: color.get(get("summary-color"));
    margin-left: -($padding-x);
    margin-right: -($padding-x);
    line-height: get("summary-line-height");
    padding: get("summary-padding-y") $padding-x;
    vertical-align: top;
    font-weight: bold;
    cursor: pointer;
    align-items: center;
    width: calc(100% + $padding-x-double); // To fix if using <button>
 
    &:has(#{ $prefix }__icon) {
      display: flex;
      list-style: none; // Remove the default arrow (old safari?)
      &::-webkit-details-marker,
      &::marker {
        display: none;
        content: "";
      }
    }
    
    @if (get("summary-type-size")) {
      @include typography.size(get("summary-type-size"));
    }
    &:hover {
      background-color: color.get(get("summary-background-color-hover"));
      color: color.get(get("summary-color-hover"));
      #{ $prefix }__icon {
        background-color: color.get(get("icon-background-color-hover"));
        color: color.get(get("icon-color-hover"));
      }
    }
  }
  #{ $prefix }__icon {
    flex: 0 0 get("icon-size");
    color: color.get(get("icon-color"));
    margin-left: auto;
    padding-left: 0.5em;
    background-color: color.get(get("icon-background-color"));
    border-radius: get("icon-border-radius");
    width: get("icon-size");
    height: get("icon-size");
    font-size: get("icon-font-size");
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
  }
  #{ $prefix }--transparent {
    border-left: none;
    border-right: none;
    background-color: transparent;
    padding-left: get("transparent-padding-x");
    padding-right: get("transparent-padding-x");
    > #{ $prefix }__summary {
      margin-left: -(get("transparent-padding-x"));
      margin-right: -(get("transparent-padding-x"));
      width: 100%;
      padding: get("transparent-padding-y") get("transparent-padding-x");
      background-color: transparent;
      border: none;
    }
    &[open], 
    &.is-active {
      background-color: transparent;
      > #{ $prefix }__summary{
        border-bottom: none;
        margin-bottom: 0;
      }
    }
  }
  #{ $prefix }--borderless {
    border: none;
    & + & {
      $gap: -(get("margin") - get("borderless-margin-between"));
      margin-top: $gap;
      margin-top: calc($gap - get("border-width"));
    }
    &[open],
    &.is-active {
      & > .accordion__summary {
        border-bottom: none;
      }
    }
  }
}