////
/// @group Internal Helper Functions
////

///
/// Returns truthiness of a value
///
/// @access private
///
/// @param {*} $value
///
/// @return {Bool}
///
@function flint-is-true($value) {
	@return if($value == null, false, $value and $value != null and $value != "" and $value != ());
}

///
/// Checks if item is map
///
/// @access private
///
/// @param {Map} $n
///
/// @return {Bool}
///
@function flint-is-map($n) {
	@return type-of($n) == "map";
}

///
/// Checks if item is list
///
/// @access private
///
/// @param {List} $n
///
/// @return {Bool}
///
@function flint-is-list($n) {
	@return type-of($n) == "list";
}

///
/// Checks if item is number
///
/// @access private
///
/// @param {Number} $n
///
/// @return {Bool}
///
@function flint-is-number($n) {
	@return type-of($n) == "number";
}

///
/// Checks if item is string
///
/// @access private
///
/// @param {String} $n
///
/// @return {Bool}
///
@function flint-is-string($n) {
	@return type-of($n) == "string";
}

///
/// Checks if item is not string
///
/// @access private
///
/// @param {String} $n
///
/// @return {Bool}
///
@function flint-is-not-string($n) {
	@return type-of($n) != "string";
}

///
/// Get gutter value from config map
///
/// @access private
///
/// @return {Number}
///
@function flint-get-gutter() {
	@return flint-get-value("settings", "gutter");
}

///
/// Gets list of each breakpoint's key
///
/// @access private
///
/// @return {List}
///
@function flint-get-all-keys() {
	@return map-keys(flint-get-value("breakpoints"));
}

///
/// Gets list of all breakpoints
///
/// @access private
///
/// @return {List}
///
@function flint-get-all-breakpoints() {
	$all-keys: flint-get-all-keys();
	$all-breakpoints: ();

	@each $key in $all-keys {
		$all-breakpoints: append($all-breakpoints, flint-get-value("breakpoints", $key, "breakpoint"), "comma");
	}

	@return $all-breakpoints;
}

///
/// Checks if passed $key is the highest breakpoint
///
/// @access private
///
/// @param {String} $key - alias of breakpoint
///
/// @return {Bool}
///
@function flint-is-highest-breakpoint($key) {
	@return flint-get-value("breakpoints", $key, "breakpoint") == max(flint-get-all-breakpoints()...);
}

///
/// Checks if passed $key is the lowest breakpoint
///
/// @access private
///
/// @param {String} $key - alias of breakpoint
///
/// @return {Bool}
///
@function flint-is-lowest-breakpoint($key) {
	@return flint-get-value("breakpoints", $key, "breakpoint") == min(flint-get-all-breakpoints()...);
}

///
/// Checks if $key is grid default
///
/// @access private
///
/// @param {String} $key - alias of breakpoint
///
/// @return {Bool}
///
@function flint-is-default($key) {
	@return $key == flint-get-value("settings", "default");
}

///
/// Gets all breakpoint column values
///
/// @access private
///
/// @return {List}
///
@function flint-get-all-columns() {
	$all-keys: flint-get-all-keys();
	$all-columns: ();

	@each $key in $all-keys {
		$all-columns: append($all-columns, flint-get-value("breakpoints", $key, "columns"), "comma");
	}

	@return $all-columns;
}

///
/// Returns the unit used in config
///
/// @access private
///
/// @return {*}
///
@function flint-get-config-unit() {
	@return unit(flint-get-value("settings", "gutter"));
}

///
/// Convert pixel value to em
///
/// @access private
///
/// @param {Number} $target  - pixel value
/// @param {Number} $context - context to divide by
///
/// @return {Number} em value of target relative to context
///
@function flint-to-em($target, $context: $flint__base-font-size) {
	@return ($target / $context) * 1em;
}

//
/// Convert pixel value to rem
///
/// @access private
///
/// @param {Number} $target  - pixel value
/// @param {Number} $context - context to divide by
///
/// @return {Number} rem value of target relative to context
///
@function flint-to-rem($target, $context: $flint__base-font-size) {
	@return ($target / $context) * 1rem;
}

///
/// Use Ruby functions in place of Sass functions where possible
///   to speed up performance, especially with string functions
///
/// @access private
///
/// @return {Bool}
///
@function flint-use-ruby-functions() {
	@return flint_use_ruby() == true;
}