@use '@angular/cdk';

@use '../core/focus-indicators/private';
@use '../core/tokens/token-utils';
@use './m3-datepicker';

$calendar-padding: 8px !default;
$calendar-header-divider-width: 1px !default;
$calendar-controls-vertical-padding: 5%;
// We use the same padding as the month / year label, but subtract 16px since there is padding
// between the edge of the button and the text. This ensures that the button text lines up with
// the month / year label text.
$calendar-controls-side-margin: calc(33% / 7 - 16px);

$calendar-arrow-size: 5px !default;
$calendar-arrow-disabled-opacity: 0.5 !default;

$fallbacks: m3-datepicker.get-tokens();

.mat-calendar {
  display: block;

  // Prevents layout issues if the line height bleeds in from the body (see #29756).
  line-height: normal;

  font-family: token-utils.slot(datepicker-calendar-text-font, $fallbacks);
  font-size: token-utils.slot(datepicker-calendar-text-size, $fallbacks);
}

.mat-calendar-header {
  padding: $calendar-padding $calendar-padding 0 $calendar-padding;
}

.mat-calendar-content {
  padding: 0 $calendar-padding $calendar-padding $calendar-padding;
  outline: none;
}

.mat-calendar-controls {
  display: flex;
  align-items: center;
  margin: $calendar-controls-vertical-padding $calendar-controls-side-margin;
}

.mat-calendar-spacer {
  flex: 1 1 auto;
}

.mat-calendar-period-button {
  min-width: 0;
  margin: 0 8px;

  font-size: token-utils.slot(datepicker-calendar-period-button-text-size, $fallbacks);
  font-weight: token-utils.slot(datepicker-calendar-period-button-text-weight, $fallbacks);
  --mat-button-text-label-text-color: #{
      token-utils.slot(datepicker-calendar-period-button-text-color, $fallbacks)};
}

.mat-calendar-arrow {
  display: inline-block;
  width: $calendar-arrow-size * 2;
  height: $calendar-arrow-size;
  margin: 0 0 0 $calendar-arrow-size;
  vertical-align: middle;

  fill: token-utils.slot(datepicker-calendar-period-button-icon-color, $fallbacks);

  &.mat-calendar-invert {
    transform: rotate(180deg);
  }

  [dir='rtl'] & {
    margin: 0 $calendar-arrow-size 0 0;
  }

  @include cdk.high-contrast {
    // Setting the fill to `currentColor` doesn't work on Chromium browsers.
    fill: CanvasText;
  }
}

.mat-calendar-previous-button,
.mat-calendar-next-button {
  // Needs need a bit more specificity to avoid being overwritten by the .mat-icon-button.
  .mat-datepicker-content &:not(.mat-mdc-button-disabled) {
    color: token-utils.slot(datepicker-calendar-navigation-button-icon-color, $fallbacks);
  }

  [dir='rtl'] & {
    transform: rotate(180deg);
  }
}

.mat-calendar-table {
  border-spacing: 0;
  border-collapse: collapse;
  width: 100%;
}

.mat-calendar-table-header th {
  text-align: center;
  padding: 0 0 $calendar-padding 0;
  color: token-utils.slot(datepicker-calendar-header-text-color, $fallbacks);
  font-size: token-utils.slot(datepicker-calendar-header-text-size, $fallbacks);
  font-weight: token-utils.slot(datepicker-calendar-header-text-weight, $fallbacks);
}

.mat-calendar-table-header-divider {
  position: relative;
  height: $calendar-header-divider-width;

  // We use an absolutely positioned pseudo-element as the divider line for the table header so we
  // can extend it all the way to the edge of the calendar.
  &::after {
    content: '';
    position: absolute;
    top: 0;
    left: -$calendar-padding;
    right: -$calendar-padding;
    height: $calendar-header-divider-width;
    background: token-utils.slot(datepicker-calendar-header-divider-color, $fallbacks);
  }
}

// For the calendar element, default inset/offset values are necessary to ensure that
// the focus indicator is sufficiently contrastive and renders appropriately.
.mat-calendar-body-cell-content::before {
  $border-width: var(--mat-focus-indicator-border-width, #{private.$default-border-width});
  $offset: calc(#{$border-width} + 3px);
  margin: calc(#{$offset} * -1);
}

// For calendar cells, render the focus indicator when the parent cell is
// focused.
.mat-calendar-body-cell:focus-visible .mat-focus-indicator::before {
  content: '';
}

