//     _            _           _                           _ _
//    (_)          | |         | |                         | (_)
//     _ _ __   ___| |_   _  __| | ___   _ __ ___   ___  __| |_  __ _
//    | | '_ \ / __| | | | |/ _` |/ _ \ | '_ ` _ \ / _ \/ _` | |/ _` |
//    | | | | | (__| | |_| | (_| |  __/ | | | | | |  __/ (_| | | (_| |
//    |_|_| |_|\___|_|\__,_|\__,_|\___| |_| |_| |_|\___|\__,_|_|\__,_|
//
//      Simple, elegant and maintainable media queries in Sass
//                        v2.0.0
//
//        https://eduardoboucas.github.io/include-media
//
//         Authors: Eduardo Boucas (@eduardoboucas)
//                  Kitty Giraudel (@kittygiraudel)
//
//      This project is licensed under the terms of the MIT license
@charset "UTF-8";

////
/// include-media library public configuration
/// @author Eduardo Boucas
/// @access public
////
@use 'sass:math';
@use 'sass:map';
@use 'sass:list';
@use 'sass:string';
@use 'sass:meta';

///
/// Creates a list of global breakpoints
///
/// @example scss - Creates a single breakpoint with the label `phone`
///  $breakpoints: ('phone': 320px);
///
$breakpoints: (
	'phone': 320px,
	'tablet': 768px,
	'desktop': 1024px,
) !default;

///
/// Creates a list of static expressions or media types
///
/// @example scss - Creates a single media type (screen)
///  $media-expressions: ('screen': 'screen');
///
/// @example scss - Creates a static expression with logical disjunction (OR operator)
///  $media-expressions: (
///    'retina2x': '(-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi)'
///  );
///
$media-expressions: (
	'screen': 'screen',
	'print': 'print',
	'handheld': 'handheld',
	'landscape': '(orientation: landscape)',
	'portrait': '(orientation: portrait)',
	'retina2x':
		'(-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi), (min-resolution: 2dppx)',
	'retina3x':
		'(-webkit-min-device-pixel-ratio: 3), (min-resolution: 350dpi), (min-resolution: 3dppx)',
) !default;

///
/// Defines a number to be added or subtracted from each unit when declaring breakpoints with exclusive intervals
///
/// @example scss - Interval for pixels is defined as `1` by default
///  @include media('>128px') {}
///
///  /* Generates: */
///  @media (min-width: 129px) {}
///
/// @example scss - Interval for ems is defined as `0.01` by default
///  @include media('>20em') {}
///
///  /* Generates: */
///  @media (min-width: 20.01em) {}
///
/// @example scss - Interval for rems is defined as `0.1` by default, to be used with `font-size: 62.5%;`
///  @include media('>2.0rem') {}
///
///  /* Generates: */
///  @media (min-width: 2.1rem) {}
///
$unit-intervals: (
	'px': 1,
	'em': 0.01,
	'rem': 0.1,
	'': 0,
) !default;

///
/// Defines whether support for media queries is available, useful for creating separate stylesheets
/// for browsers that don't support media queries.
///
/// @example scss - Disables support for media queries
///  $im-media-support: false;
///  @include media('>=tablet') {
///    .foo {
///      color: tomato;
///    }
///  }
///
///  /* Generates: */
///  .foo {
///    color: tomato;
///  }
///
$im-media-support: true !default;

///
/// Selects which breakpoint to emulate when support for media queries is disabled. Media queries that start at or
/// intercept the breakpoint will be displayed, any others will be ignored.
///
/// @example scss - This media query will show because it intercepts the static breakpoint
///  $im-media-support: false;
///  $im-no-media-breakpoint: 'desktop';
///  @include media('>=tablet') {
///    .foo {
///      color: tomato;
///    }
///  }
///
///  /* Generates: */
///  .foo {
///    color: tomato;
///  }
///
/// @example scss - This media query will NOT show because it does not intercept the desktop breakpoint
///  $im-media-support: false;
///  $im-no-media-breakpoint: 'tablet';
///  @include media('>=desktop') {
///    .foo {
///      color: tomato;
///    }
///  }
///
///  /* No output */
///
$im-no-media-breakpoint: 'desktop' !default;

///
/// Selects which media expressions are allowed in an expression for it to be used when media queries
/// are not supported.
///
/// @example scss - This media query will show because it intercepts the static breakpoint and contains only accepted media expressions
///  $im-media-support: false;
///  $im-no-media-breakpoint: 'desktop';
///  $im-no-media-expressions: ('screen');
///  @include media('>=tablet', 'screen') {
///    .foo {
///      color: tomato;
///    }
///  }
///
///   /* Generates: */
///   .foo {
///     color: tomato;
///   }
///
/// @example scss - This media query will NOT show because it intercepts the static breakpoint but contains a media expression that is not accepted
///  $im-media-support: false;
///  $im-no-media-breakpoint: 'desktop';
///  $im-no-media-expressions: ('screen');
///  @include media('>=tablet', 'retina2x') {
///    .foo {
///      color: tomato;
///    }
///  }
///
///  /* No output */
///
$im-no-media-expressions: ('screen', 'portrait', 'landscape') !default;

////
/// Cross-engine logging engine
/// @author Kitty Giraudel
/// @access private
////

///
/// Log a message either with `@error` if supported
/// else with `@warn`, using `feature-exists('at-error')`
/// to detect support.
///
/// @param {String} $message - Message to log
///
@function im-log($message) {
	@if meta.feature-exists('at-error') {
		@error $message;
	} @else {
		@warn $message;
		$_: noop();
	}

	@return $message;
}

///
/// Wrapper mixin for the log function so it can be used with a more friendly
/// API than `@if im-log('..') {}` or `$_: im-log('..')`. Basically, use the function
/// within functions because it is not possible to include a mixin in a function
/// and use the mixin everywhere else because it's much more elegant.
///
/// @param {String} $message - Message to log
///
@mixin log($message) {
	@if im-log($message) {
	}
}

///
/// Function with no `@return` called next to `@warn` in Sass 3.3
/// to trigger a compiling error and stop the process.
///
@function noop() {
}

///
/// Determines whether a list of conditions is intercepted by the static breakpoint.
///
/// @param {Arglist}   $conditions  - Media query conditions
///
/// @return {Boolean} - Returns true if the conditions are intercepted by the static breakpoint
///
@function im-intercepts-static-breakpoint($conditions...) {
	$no-media-breakpoint-value: map.get($breakpoints, $im-no-media-breakpoint);

	@if not $no-media-breakpoint-value {
		@if im-log('`#{$im-no-media-breakpoint}` is not a valid breakpoint.') {
		}
	}

	@each $condition in $conditions {
		@if not map.has-key($media-expressions, $condition) {
			$operator: get-expression-operator($condition);
			$prefix: get-expression-prefix($operator);
			$value: get-expression-value($condition, $operator);

			@if ($prefix == 'max' and $value <= $no-media-breakpoint-value) or
				($prefix == 'min' and $value > $no-media-breakpoint-value)
			{
				@return false;
			}
		} @else if not list.index($im-no-media-expressions, $condition) {
			@return false;
		}
	}

	@return true;
}

////
/// Parsing engine
/// @author Kitty Giraudel
/// @access private
////

///
/// Get operator of an expression
///
/// @param {String} $expression - Expression to extract operator from
///
/// @return {String} - Any of `>=`, `>`, `<=`, `<`, `≥`, `≤`
///
@function get-expression-operator($expression) {
	@each $operator in ('>=', '>', '<=', '<', '≥', '≤') {
		@if string.index($expression, $operator) {
			@return $operator;
		}
	}

	// It is not possible to include a mixin inside a function, so we have to
	// rely on the `im-log(..)` function rather than the `log(..)` mixin. Because
	// functions cannot be called anywhere in Sass, we need to hack the call in
	// a dummy variable, such as `$_`. If anybody ever raise a scoping issue with
	// Sass 3.3, change this line in `@if im-log(..) {}` instead.
	$_: im-log('No operator found in `#{$expression}`.');
}

///
/// Get dimension of an expression, based on a found operator
///
/// @param {String} $expression - Expression to extract dimension from
/// @param {String} $operator - Operator from `$expression`
///
/// @return {String} - `width` or `height` (or potentially anything else)
///
@function get-expression-dimension($expression, $operator) {
	$operator-index: string.index($expression, $operator);
	$parsed-dimension: string.slice($expression, 0, $operator-index - 1);
	$dimension: 'width';

	@if string.length($parsed-dimension) > 0 {
		$dimension: $parsed-dimension;
	}

	@return $dimension;
}

///
/// Get dimension prefix based on an operator
///
/// @param {String} $operator - Operator
///
/// @return {String} - `min` or `max`
///
@function get-expression-prefix($operator) {
	@return if(list.index(('<', '<=', '≤'), $operator), 'max', 'min');
}

///
/// Get value of an expression, based on a found operator
///
/// @param {String} $expression - Expression to extract value from
/// @param {String} $operator - Operator from `$expression`
///
/// @return {Number} - A numeric value
///
@function get-expression-value($expression, $operator) {
	$operator-index: string.index($expression, $operator);
	$value: string.slice($expression, $operator-index + string.length($operator));

	@if map.has-key($breakpoints, $value) {
		$value: map.get($breakpoints, $value);
	} @else {
		$value: to-number($value);
	}

	$interval: map.get($unit-intervals, math.unit($value));

	@if not $interval {
		// It is not possible to include a mixin inside a function, so we have to
		// rely on the `im-log(..)` function rather than the `log(..)` mixin. Because
		// functions cannot be called anywhere in Sass, we need to hack the call in
		// a dummy variable, such as `$_`. If anybody ever raise a scoping issue with
		// Sass 3.3, change this line in `@if im-log(..) {}` instead.
		$_: im-log('Unknown unit `#{math.unit($value)}`.');
	}

	@if $operator == '>' {
		$value: $value + $interval;
	} @else if $operator == '<' {
		$value: $value - $interval;
	}

	@return $value;
}

///
/// Parse an expression to return a valid media-query expression
///
/// @param {String} $expression - Expression to parse
///
/// @return {String} - Valid media query
///
@function parse-expression($expression) {
	// If it is part of $media-expressions, it has no operator
	// then there is no need to go any further, just return the value
	@if map.has-key($media-expressions, $expression) {
		@return map.get($media-expressions, $expression);
	}

	$operator: get-expression-operator($expression);
	$dimension: get-expression-dimension($expression, $operator);
	$prefix: get-expression-prefix($operator);
	$value: get-expression-value($expression, $operator);

	@return '(#{$prefix}-#{$dimension}: #{$value})';
}

///
/// Slice `$list` between `$start` and `$end` indexes
///
/// @access private
///
/// @param {List} $list - List to slice
/// @param {Number} $start [1] - Start index
/// @param {Number} $end [length($list)] - End index
///
/// @return {List} Sliced list
///
@function slice($list, $start: 1, $end: list.length($list)) {
	@if list.length($list) < 1 or $start > $end {
		@return ();
	}

	$result: ();

	@for $i from $start through $end {
		$result: list.append($result, list.nth($list, $i), comma);
	}

	@return $result;
}

////
/// String to number converter
/// @author Kitty Giraudel
/// @access private
////

///
/// Casts a string into a number
///
/// @param {String | Number} $value - Value to be parsed
///
/// @return {Number}
///

@function to-number($value) {
	@if meta.type-of($value) == 'number' {
		@return $value;
	} @else if meta.type-of($value) != 'string' {
		$_: im-log('Value for `to-number` should be a number or a string.');
	}

	$first-character: string.slice($value, 1, 1);
	$result: 0;
	$digits: 0;
	$minus: ($first-character == '-');
	$numbers: (
		'0': 0,
		'1': 1,
		'2': 2,
		'3': 3,
		'4': 4,
		'5': 5,
		'6': 6,
		'7': 7,
		'8': 8,
		'9': 9,
	);

	// Remove +/- sign if present at first character
	@if ($first-character == '+' or $first-character == '-') {
		$value: string.slice($value, 2);
	}

	@for $i from 1 through string.length($value) {
		$character: string.slice($value, $i, $i);

		@if not(list.index(map.keys($numbers), $character) or $character == '.') {
			@return to-length(if($minus, -$result, $result), string.slice($value, $i));
		}

		@if $character == '.' {
			$digits: 1;
		} @else if $digits == 0 {
			$result: $result * 10 + map.get($numbers, $character);
		} @else {
			$digits: $digits * 10;
			$result: $result + math.div(map.get($numbers, $character), $digits);
		}
	}

	@return if($minus, -$result, $result);
}

///
/// Add `$unit` to `$value`
///
/// @param {Number} $value - Value to add unit to
/// @param {String} $unit - String representation of the unit
///
/// @return {Number} - `$value` expressed in `$unit`
///
@function to-length($value, $unit) {
	$units: (
		'px': 1px,
		'cm': 1cm,
		'mm': 1mm,
		'%': 1%,
		'ch': 1ch,
		'pc': 1pc,
		'in': 1in,
		'em': 1em,
		'rem': 1rem,
		'pt': 1pt,
		'ex': 1ex,
		'vw': 1vw,
		'vh': 1vh,
		'vmin': 1vmin,
		'vmax': 1vmax,
	);

	@if not list.index(map.keys($units), $unit) {
		$_: im-log('Invalid unit `#{$unit}`.');
	}

	@return $value * map.get($units, $unit);
}

///
/// This mixin aims at redefining the configuration just for the scope of
/// the call. It is helpful when having a component needing an extended
/// configuration such as custom breakpoints (referred to as tweakpoints)
/// for instance.
///
/// @author Kitty Giraudel
///
/// @param {Map} $tweakpoints [()] - Map of tweakpoints to be merged with `$breakpoints`
/// @param {Map} $tweak-media-expressions [()] - Map of tweaked media expressions to be merged with `$media-expression`
///
/// @example scss - Extend the global breakpoints with a tweakpoint
///  @include media-context(('custom': 678px)) {
///    .foo {
///      @include media('>phone', '<=custom') {
///       // ...
///      }
///    }
///  }
///
/// @example scss - Extend the global media expressions with a custom one
///  @include media-context($tweak-media-expressions: ('all': 'all')) {
///    .foo {
///      @include media('all', '>phone') {
///       // ...
///      }
///    }
///  }
///
/// @example scss - Extend both configuration maps
///  @include media-context(('custom': 678px), ('all': 'all')) {
///    .foo {
///      @include media('all', '>phone', '<=custom') {
///       // ...
///      }
///    }
///  }
///
@mixin media-context($tweakpoints: (), $tweak-media-expressions: ()) {
	// Save global configuration
	$global-breakpoints: $breakpoints;
	$global-media-expressions: $media-expressions;

	// Update global configuration
	$breakpoints: map.merge($breakpoints, $tweakpoints) !global;
	$media-expressions: map.merge($media-expressions, $tweak-media-expressions) !global;

	@content;

	// Restore global configuration
	$breakpoints: $global-breakpoints !global;
	$media-expressions: $global-media-expressions !global;
}

////
/// include-media public exposed API
/// @author Eduardo Boucas
/// @access public
////

///
/// Generates a media query based on a list of conditions
///
/// @param {Arglist}   $conditions  - Media query conditions
///
/// @example scss - With a single set breakpoint
///  @include media('>phone') { }
///
/// @example scss - With two set breakpoints
///  @include media('>phone', '<=tablet') { }
///
/// @example scss - With custom values
///  @include media('>=358px', '<850px') { }
///
/// @example scss - With set breakpoints with custom values
///  @include media('>desktop', '<=1350px') { }
///
/// @example scss - With a static expression
///  @include media('retina2x') { }
///
/// @example scss - Mixing everything
///  @include media('>=350px', '<tablet', 'retina3x') { }
///
@mixin media($conditions...) {
	@if ($im-media-support and list.length($conditions) == 0) or
		(not $im-media-support and im-intercepts-static-breakpoint($conditions...))
	{
		@content;
	} @else if ($im-media-support and list.length($conditions) > 0) {
		@media #{string.unquote(parse-expression(list.nth($conditions, 1)))} {
			// Recursive call
			$sliced-conditions: slice($conditions, 2);
			@include media($sliced-conditions...) {
				@content;
			}
		}
	}
}
