// Container Syntax
// ================

// Set a container element
@mixin container(
  $container: get-container()
) {
  $container  : parse-container($container);
  $grid       : parse-grid(nth($container,1));
  $justify    : nth($container,2);
  $show       : nth($container,3);
  $box        : get-setting(box-sizing, $grid);

  // if there is a container width, use it
  $width      : get-setting(container, $grid);

  @if not $width {
    // if we have a column width, calculate container from that
    $column-width-setting: get-setting(column-width, $grid);

    @if $column-width-setting {
      $columns-setting: get-setting(columns, $grid);
      $gutters-setting: get-setting(gutters, $grid);
      $outer: if(get-setting(gutter-placement, $grid) == inside, true, false);

      $width: calculate-container-width($columns-setting, $gutters-setting, $column-width-setting, $outer);
    } @else {
      // if we have nothing, default to 100%
      $width: 100%;
    }
  }

  @if $show and $show != hide {
    @include grid-background($grid);
  }

  @if $box == border-box {
    @include box-sizing(border-box);
  } @else if $box == content-box {
    @include box-sizing(content-box);
  }

  @include float-container($width, $justify, $show);
}

// Container Helpers
// -----------------

// Get the current container-related settings
@function get-container(
) {
  $show: false;

  // Create keyword for show-grids setting
  @if $show-grids and $show-grids != "hide" {
    $show: show;
  } @else {
    $show: hide;
  }

  @return get-grid() $container-position $show;
}

// parse the container shorthand syntax, and return an ordered list
@function parse-container(
  $container: get-container()
) {
  $grid     : false;
  $justify  : $container-position;
  $show     : $show-grids;

  // justify: left | center | right
  @if index($container, left) {
    $justify: left;
    $container: filter($container, left);
  } @else if index($container, center) {
    $justify: center;
    $container: filter($container, center);
  } @else if index($container, right) {
    $justify: right;
    $container: filter($container, right);
  }

  // show-grids: show | hide
  @if index($container, show) {
    $show: true;
    $container: filter($container, show);
  } @else if index($container, hide) {
    $show: false;
    $container: filter($container, hide);
  }

  @if length($container) == 1 {
    $grid: nth($container,1);
  } @else {
    $grid: $container;
  }

  @return $grid $justify $show;
}