@use 'sass:map';

// Shared styling of article images shown as background
@mixin image-as-background {
  background-color: var(--newtab-element-secondary-color);
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  border-radius: var(--border-radius-small);
  box-shadow: $shadow-image-inset;
}

// Note: lineHeight and fontSize should be unitless but can be derived from pixel values
// Bug 1550624 to clean up / remove this mixin to avoid duplicate styles
@mixin limit-visible-lines($line-count, $line-height, $font-size) {
  font-size: $font-size;
  -webkit-line-clamp: $line-count;
  line-height: $line-height;
}

@mixin dark-theme-only {
  [lwt-newtab-brighttext] & {
    @content;
  }
}

@mixin ds-border-top {
  @content;

  @include dark-theme-only {
    border-block-start: 1px solid $grey-60;
  }

  border-block-start: 1px solid $grey-30;
}

@mixin ds-border-bottom {
  @content;

  @include dark-theme-only {
    border-block-end: 1px solid $grey-60;
  }

  border-block-end: 1px solid $grey-30;
}

@mixin ds-fade-in($halo-color: $blue-50-30) {
  box-shadow: 0 0 0 5px $halo-color;
  transition: box-shadow 150ms;
  border-radius: var(--border-radius-small);
  outline: none;
}

// Some wallpapers are light/dark, and may not match the user set contrast,
// so some text, icons, etc that are displayed over the wallpaper need a contrast fix.
@mixin wallpaper-contrast-fix {
  .lightWallpaper & {
    color-scheme: light;
  }

  .darkWallpaper & {
    color-scheme: dark;
  }
}

// Used to visualize the different breakpoints on an applied element
// See variables.scss for $debug-breakpoints
@mixin debug-breakpoints {
  @each $name, $value in $debug-breakpoints {
    $color: map.get($debug-breakpoint-colors, $name);

    @media (min-width: $value) {
      outline: 1px solid #{$color};
    }
  }
}

// Bug 2020945 - CSS custom properties cannot be used in container queries, so these values
// are stored as SCSS variables to be interpolated into calc() expressions.
$col-width-px: 75px;
$col-gap-px: 0.75rem;
$side-col-width-px: $col-width-px * 2;

// Returns the width of $n grid columns including the (n-1) gaps between them.
// stylelint-disable-next-line scss/at-function-pattern
@function --col-span($n) {
  @return calc(#{$n} * var(--col-width) + #{$n - 1} * var(--space-medium));
}

// Use this mixin instead of static media query breakpoints. It applies styles
// when the content grid has room for at least $cols columns, making layouts
// adapt to the available column count rather than fixed viewport widths.
// Usage: @include at-content-cols(6) { grid-column: span 6; }
@mixin at-content-cols($cols) {
  $min-width: calc(#{$cols} * #{$col-width-px} + #{$cols - 1} * #{$col-gap-px});

  @container content-grid (inline-size >= #{$min-width}) {
    @content;
  }
}

// Like at-content-cols but applies only within an exclusive column-count range.
// $min-cols: lower bound (inclusive); use 0 to match from the smallest size.
// $max-cols: upper bound (exclusive).
// Usage: @include at-content-cols-range(8, 12) { … }
@mixin at-content-cols-range($min-cols, $max-cols) {
  $max-width: calc(#{$max-cols} * #{$col-width-px} + #{$max-cols - 1} * #{$col-gap-px});

  @if $min-cols == 0 {
    @container content-grid (inline-size < #{$max-width}) {
      @content;
    }
  } @else {
    $min-width: calc(#{$min-cols} * #{$col-width-px} + #{$min-cols - 1} * #{$col-gap-px});

    @container content-grid ((inline-size >= #{$min-width}) and (inline-size < #{$max-width})) {
      @content;
    }
  }
}

// Use for elements outside .content (e.g. in .sidebar-inline-start).
// Queries the outer .container when it is wide enough to give the content
// area room for at least $cols columns.
// Usage: @include at-outer-grid-cols(6) { display: inline-block; }
@mixin at-outer-grid-cols($cols) {
  $min-width: calc(2 * #{$side-col-width-px} + #{$cols + 1} * #{$col-gap-px} + #{$cols} * #{$col-width-px});

  @container outer-grid (inline-size >= #{$min-width}) {
    @content;
  }
}

// Auto-fill centering grid with column tracks sized to $cols-per-track Nova columns.
// Used for section wrappers and card grids that should center within the content area.
@mixin nova-centering-grid($cols-per-track: 4) {
  display: grid;
  grid-template-columns: repeat(auto-fill, --col-span($cols-per-track));
  gap: var(--space-medium);
  justify-content: center;
  grid-column: 1 / -1;
}

// Adds transparency and a hover effect to card background.
@mixin newtab-card-style {
  background: var(--newtab-background-card);
  transition: opacity 0.2s ease;

  &:hover {
    background: var(--newtab-background-color-secondary);
  }
}

// Nova feature highlight gradient border, shared across highlight components.
@mixin nova-feature-highlight-border {
  --nova-highlight-border-gradient-start: light-dark(#B58CFF, #A67CE5);
  --nova-highlight-border-gradient-end: light-dark(#FF8A5B, #764EDD);
  --nova-highlight-shadow:
    -10px -10px 28px rgba(231, 217, 255, 70%),
    8px 8px 28px rgba(255, 211, 183, 70%),
    0 3px 12px rgba(0, 0, 0, 4%),
    0 0.375px 1px rgba(0, 0, 0, 1.5%);

  border: var(--border-width) solid var(--border-color-transparent);
  border-radius: var(--border-radius-large);
  background:
    linear-gradient(var(--background-color-box), var(--background-color-box)) padding-box,
    linear-gradient(135deg, var(--nova-highlight-border-gradient-start), var(--nova-highlight-border-gradient-end)) border-box;
  box-shadow: var(--nova-highlight-shadow);

  @media (prefers-color-scheme: dark) {
    --nova-highlight-shadow:
      -10px -10px 28px rgba(99, 47, 200, 28%),
      8px 8px 28px rgba(255, 138, 87, 24%),
      0 3px 12px rgba(0, 0, 0, 32%),
      0 0.375px 1.5px rgba(0, 0, 0, 16%);
  }

  @media (forced-colors: active) {
    background: Canvas;
  }
}

// Baseline styles for all widgets
@mixin widget-base-style {
  --widget-size-transition-duration: 180ms;
  --widget-size-transition-easing: ease;

  @include newtab-card-style;

  padding: var(--space-medium);
  border-radius: var(--border-radius-large);
  box-shadow: var(--box-shadow-level-2);
  color: var(--text-color);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: height var(--widget-size-transition-duration) var(--widget-size-transition-easing);

  &.small-widget,
  &.medium-widget {
    height: var(--newtab-card-height-small);
  }

  &.large-widget {
    height: var(--newtab-card-height);
  }

  &:hover,
  &:focus-within {
    outline: 1px solid var(--border-color-deemphasized);
    box-shadow: var(--card-box-shadow-hover);
  }

  @media (prefers-reduced-motion: reduce) {
    transition: none;
  }
}