@import '../../common/variables.less';

/**
 * Minimal styling for initial no-JS server-rendered
 * search form, which gets replaced by Codex on focus.
 * Most values are hard-coded since they aim to
 * mimic Codex-specific variables and disable the
 * ResourceLoader LESS transformation of `calc`.
 */

// Derived from @size-base design token in Codex
@size-base: 32px;

@min-size-search-button: 30px;
@background-size-x-search-button: unit( 20px / @font-size-browser / @font-size-base, em );

// Search container
// We have to put those styles outside `.skin-vector-search-vue`,
// as we can't address no-JS modern and Vue enhanced otherwise.
.vector-search-box {
	// Use Vector's base font-size, as this is a component outside of `.vector-body`.
	font-size: @font-size-base;
	// Support IE 9-11, Trident cuts values 2 digits after decimal point.
	// `calc` enables to set correct calculation in place again. See T102364.
	font-size: @font-size-base--trident-hack;
	// If this is a flex item, make sure it grows into available space.
	flex-grow: 1;

	> div {
		max-width: @max-width-search;
	}
}

// Typeahead search elements
.vector-search-box-vue .vector-search-box-input,
.vector-search-box-vue .searchButton {
	// Overrides #mw-searchButton in resources/skins.vector.styles/SearchBox.less
	font-size: inherit;
}

.vector-search-box-vue .vector-search-box-input {
	height: @size-base;
}

.vector-search-box-vue .searchButton {
	background-size: @background-size-x-search-button auto;
}

// Only apply the following Codex-related rules to clients who have js enabled.
.client-js .vector-search-box-vue {
	// Derived from @size-search-figure in Codex.
	// https://gerrit.wikimedia.org/r/plugins/gitiles/design/codex/+/refs/tags/v0.1.0-alpha.8/packages/codex/src/components/typeahead-search/TypeaheadSearch.vue#676
	@size-search-figure: 40px;
	// Derived from text input start icon padding in Codex.
	// https://gerrit.wikimedia.org/r/plugins/gitiles/design/codex/+/refs/tags/v0.1.0-alpha.8/packages/codex/src/components/text-input/TextInput.vue#257
	@padding-left-start-icon: 36px;

	.cdx-typeahead-search {
		// Hide the button, only show it on hover or when the input or the button itself is focused
		.cdx-search-input__end-button {
			opacity: 0;
			// 250ms transition to match the border-color transition in CdxTextInput
			transition: opacity 250ms;

			&:focus {
				opacity: 1;
			}
		}

		// Hide the border between the input and the button
		.cdx-text-input__input:not( :hover ):not( :focus ) {
			border-right-color: transparent;
		}

		&--active,
		&:hover {
			.cdx-search-input__end-button {
				opacity: 1;
			}

			// Make the text input's right border appear on top of the button's left border,
			// otherwise the hover transition looks weird
			.cdx-text-input {
				z-index: 1;
			}

			// Use straight corners instead of rounded corners for the border between the
			// input and the button. Only apply this on hover, to reduce (but not eliminate) the
			// tiny gap in the input's border when the button is hidden
			.cdx-text-input__input {
				border-top-right-radius: 0;
				border-bottom-right-radius: 0;
			}
		}

		.cdx-menu-item {
			// Remove margin-bottom on li elements that is applied by
			// mediawiki.skinning/elements.css.
			margin-bottom: 0;

			a {
				// Remove link underline on hover that is applied by
				// mediawiki.skinning/elements.css.
				text-decoration: none;
			}
		}

		// Reset Codex. Prevents the input border and the start icon from animating
		// when the input gets inserted into the DOM while being focused.
		&.vector-search-box-disable-transitions {
			.cdx-text-input__input:enabled,
			.cdx-text-input__start-icon {
				transition: none;
			}
		}
	}

	.vector-search-box-input {
		padding-left: @padding-left-start-icon;
		// Derived from @padding-input-text in Codex's TextInput component.
		padding-right: 8px;
	}

	// Move & resize search icon to match Codex.
	.searchButton {
		// T270202: Act like a an inert element instead of a submit button before
		// Codex loads to discourage people clicking on it since it is a submit
		// button styled to look like Codex's inert start icon. Note, ideally these
		// submit buttons should be changed to inert elements like span to be
		// semantically correct.
		pointer-events: none;
		// Override the default right & left position of the icon.
		right: auto;
		top: 0;
		bottom: 0;
		// Accounts for the 1px input border.
		left: @border-width-base;
		// Increase size to match Codex.
		width: @padding-left-start-icon;
		// Set opacity to match icon color from Codex (0.51 approximates #72777d)
		opacity: 0.51;
	}

	.vector-search-box-input:focus ~ .searchButton {
		// When the input is focused, change icon color to match Codex (0.87 approximates #202122)
		opacity: 0.87;
	}

	&.vector-search-box-show-thumbnail {
		> div {
			// Ensure the input + search button = 500px when unfocused and `auto-expand-width` enabled (i.e. search in header)
			// Also increases the width of the sticky header search, which has `auto-expand-width` disabled
			max-width: @max-width-search + unit( @size-search-expand / @font-size-browser / @font-size-base, em ); // 37.42857143em @ 16 & 0.875em
		}

		&.vector-search-box-auto-expand-width .searchButton {
			// Accounts for the margin that allocates space for the input expanding and
			// 1px input border.
			left: @size-search-expand + @border-width-base;
		}

		&.vector-search-box-auto-expand-width .vector-search-box-input {
			margin-left: @size-search-expand;
			width: ~'calc( 100% - @{size-search-expand} )';
		}

		// Recreate Codex expanding input.
		&:not( .vector-search-box-auto-expand-width ) .vector-search-box-input,
		&.vector-search-box-auto-expand-width .vector-search-box-input:focus {
			margin-left: 0;
			// Use ~ and fixed values to disable the LESS transformation in ResourceLoader LESS implementation.
			padding-left: ~'calc( @{padding-left-start-icon} + @{size-search-expand} )';
			width: 100%;
		}

		// Reposition search icon for expanded input.
		&:not( .vector-search-box-auto-expand-width ) .vector-search-box-input ~ .searchButton,
		&.vector-search-box-auto-expand-width .vector-search-box-input:focus ~ .searchButton {
			// Derived from @spacing-start-typeahead-icon in Codex
			// https://gerrit.wikimedia.org/r/plugins/gitiles/design/codex/+/refs/tags/v0.1.0-alpha.8/packages/codex/src/components/typeahead-search/TypeaheadSearch.vue#708
			@spacing-start-typeahead-icon: 22px;
			// Codex uses left: @spacing-start-typeahead-icon, but we have to account for the fact
			// that we made the search button wider and centered the icon in it
			@size-icon-px: 20px;
			left: @spacing-start-typeahead-icon - ( @padding-left-start-icon - @size-icon-px ) / 2;
		}
	}
}