@import compass/utilities

// Configure grid coordinates
$grid-columns: 12 !default
$grid-width: 60px !default
$grid-gutter-width: 20px !default
$overflow: true !default

=grid-coordinates
  @if $overflow
    .grid-pie-clearfix
      +pie-clearfix
  @else
    .grid-clearfix
      +clearfix
  .grid-container
    +grid-container-base
    @if $overflow
      @extend .grid-pie-clearfix
    @else
      @extend .grid-clearfix
  .nested-grid-container
    +nested-grid-container-base
    @if $overflow
      @extend .grid-pie-clearfix
    @else
      @extend .grid-clearfix
  .grid-block
    +grid-block-base
    @if $overflow
      @extend .grid-pie-clearfix
    @else
      @extend .grid-clearfix
  .grid-full
    +grid-base($grid-columns)
    @extend .grid-block

  // Loops
  @for $i from 1 through $grid-columns
    .grid-#{$i}
      +grid-base($i)
      @extend .grid-block
  @for $i from 1 through $grid-columns - 1
    .grid-prefix-#{$i}
      +grid-prefix($i)
  @for $i from 1 through $grid-columns - 1
    .grid-suffix-#{$i}
      +grid-suffix($i)
  @for $i from 1 through $grid-columns - 1
    .grid-push-#{$i}
      +grid-push($i)
  @for $i from 1 through $grid-columns - 1
    .grid-pull-#{$i}
      +grid-pull($i)

=overflow
  @if $overflow
    +pie-clearfix
  @else
    +clearfix

// Grid Container
=grid-container-base
  margin: 0 auto
  width: $grid-columns * $grid-width + $grid-columns * $grid-gutter-width

=grid-container
  +overflow
  +grid-container-base

// Nested Container
=nested-grid-container-base
  display: inline-block
  margin:
    left: -$grid-gutter-width / 2
    right: -$grid-gutter-width / 2
  width: auto

=nested-grid-container
  +overflow
  +nested-grid-container-base

// Grid Block
=grid-block-base
  +float-left
  position: relative
  margin: 0 $grid-gutter-width / 2

=grid-block
  +grid-block-base
  +overflow

// Grid
=grid-base($grid-columns)
  +grid-width($grid-columns)

=grid($grid-columns)
  +grid-base($grid-columns)
  +grid-block

=grid-full
  +grid($grid-columns)

// Grid logic
=grid-width($grid-columns)
  @if $grid-columns == 1
    width: $grid-width
  @else
    width: (($grid-columns * $grid-width) + ($grid-columns * $grid-gutter-width)) - $grid-gutter-width

=grid-prefix($grid-columns)
  @if $grid-columns == 1
    padding-left: $grid-width + $grid-gutter-width
  @else
    padding-left: ($grid-columns * $grid-width) + ($grid-columns * $grid-gutter-width)

=grid-suffix($grid-columns)
  @if $grid-columns == 1
    padding-right: $grid-width + $grid-gutter-width
  @else
    padding-right: ($grid-columns * $grid-width) + ($grid-columns * $grid-gutter-width)

=grid-push($grid-columns)
  @if $grid-columns == 1
    left: $grid-width + $grid-gutter-width
  @else
    left: ($grid-columns * $grid-width) + ($grid-columns * $grid-gutter-width)

=grid-pull($grid-columns)
  @if $grid-columns == 1
    left: -(($grid-width + $grid-gutter-width))
  @else
    left: -(($grid-columns * $grid-width) + ($grid-columns * $grid-gutter-width))