// Returns truthiness of a value
// -------------------------------------------------------------------------------
// @param $value [Literal] : value
// -------------------------------------------------------------------------------
// @return [Boolean]

@function is-true($value) {
	@return if($value == null, false, $value and $value != null and $value != "" and $value != ());
}

// Checks if item is map
//--------------------------------------------------------------------------------
// @param $n [Value] : value
// -------------------------------------------------------------------------------
// @return [Boolean]

@function is-map($n) {
	@if type-of($n) == "map" {
		@return true;
	} @else {
		@return false;
	}
}

// Checks if item is list
//--------------------------------------------------------------------------------
// @param $n [Value] : value
// -------------------------------------------------------------------------------
// @return [Boolean]

@function is-list($n) {
	@if type-of($n) == "list" {
		@return true;
	} @else {
		@return false;
	}
}

// Checks if item is number
//--------------------------------------------------------------------------------
// @param $n [Value] : value
// -------------------------------------------------------------------------------
// @return [Boolean]

@function is-number($n) {
	@if type-of($n) == "number" {
		@return true;
	} @else {
		@return false;
	}
}

// Checks if item is string
//--------------------------------------------------------------------------------
// @param $n [Value] : value
// -------------------------------------------------------------------------------
// @return [Boolean]

@function is-string($n) {
	@if type-of($n) == "string" {
		@return true;
	} @else {
		@return false;
	}
}

// Checks if item is not string
//--------------------------------------------------------------------------------
// @param $n [Value] : value
// -------------------------------------------------------------------------------
// @return [Boolean]

@function is-not-string($n) {
	@if type-of($n) != "string" {
		@return true;
	} @else {
		@return false;
	}
}

// Gets each breakpoint's key
// -------------------------------------------------------------------------------
// @return [List]

@function get-all-keys() {
	$all-keys: ();
  
	@for $i from 1 through (length(map-fetch($flint, config)) - 1) {
		$key: steal-key($i);
		$all-keys: append($all-keys, $key, 'comma');
	}

	@return $all-keys;
}

// Gets all breakpoints
// -------------------------------------------------------------------------------
// @return [List]

@function get-all-breakpoints() {
	$all-breakpoints: ();

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

	@return $all-breakpoints;
}

// Grabs highest breakpoint
// -------------------------------------------------------------------------------
// @dependence `get-value()`
// -------------------------------------------------------------------------------
// @return [Boolean]

@function is-highest-breakpoint($key) {
	@if get-value($key, breakpoint) == max(get-all-breakpoints()...) {
		@return true;
	} @else {
		@return false;
	}
}

// Grabs highest breakpoint
// -------------------------------------------------------------------------------
// @dependence `get-value()`
// -------------------------------------------------------------------------------
// @return [Boolean]

@function is-lowest-breakpoint($key) {
	@if get-value($key, breakpoint) == min(get-all-breakpoints()...) {
		@return true;
	} @else {
		@return false;
	}
}

// Checks if $key is grid default
// -------------------------------------------------------------------------------
// @dependence `get-value()`
// -------------------------------------------------------------------------------
// @return [Boolean]

@function is-default($key) {
	@if $key == get-value(settings, default) {
		@return true;
	} @else {
		@return false;
	}
}

// Gets all breakpoint column values
// -------------------------------------------------------------------------------
// @return [List]

@function get-all-columns() {
	$all-columns: ();

	@each $map, $keys in map-get($flint, config) {
		@each $key, $value in $keys {
			@if $key == "columns" {
				$all-columns: append($all-columns, $value, 'comma');
			}
		}
	} @return $all-columns;
}