// When color definition differs for dark and light variant
// it gets @if ed depending on $variant

//  

@function gtkalpha($color, $opacity) {
  @if $color=="currentColor" {
    @return unquote("alpha(#{$color}, #{$opacity})");
  } @else {
    @return rgba($color, $opacity);
  }
}

@function gtkmix($color1, $color2, $multiplier) {
  $alpha: blend(alpha($color1), alpha($color2), $multiplier);
  
  @if $alpha<=0 {
    @return rgba(0, 0, 0, $alpha);
  } @else {
    $red: blend(red($color1) * alpha($color1), red($color2) * alpha($color2), $multiplier) / $alpha;
    $green: blend(green($color1) * alpha($color1), green($color2) * alpha($color2), $multiplier) / $alpha;
    $blue: blend(blue($color1) * alpha($color1), blue($color2) * alpha($color2), $multiplier) / $alpha;
    
    @return rgba($red, $green, $blue, $alpha);
  }
}

@function gtkshade($color, $multiplier) {
  $new: hsla(hue($color), saturation($color) * $multiplier, lightness($color) * $multiplier, alpha($color));
  @return $new;
}

//
@import 'palette';

$base_color: #ffffff;
$text_color: #1a1a1a;
$bg_color: $core_color_b;
$fg_color: #000000;

$selected_fg_color: #42453E;
$selected_bg_color: gtkshade($core_color_a,0.9);

$selected_borders_color: gtkshade($core_color_a,0.61);
$borders_color: gtkshade($core_color_b, 0.61);
$alt_borders_color: if($variant == 'light', darken($bg_color, 24%), darken($bg_color, 8%));
$borders_edge: if($variant == 'light', transparentize(white, 0.2), transparentize($fg_color, 0.93));
$link_color: darken($core_color_a, 40%);
$link_visited_color: #551a8b;
$top_hilight: $borders_edge;
$dark_fill: mix($borders_color, $bg_color, 50%);
$headerbar_color: if($variant == 'light', lighten($bg_color, 5%), darken($bg_color, 3%));
$popover_bg_color: gtkshade($core_color_b, 1.1);
$popover_hover_color: #000000;

$scrollbar_bg_color: if($variant == 'light', mix($bg_color, $fg_color, 80%), mix($base_color, $bg_color, 50%));
$scrollbar_slider_color: mix($fg_color, $bg_color, 60%);
$scrollbar_slider_hover_color: mix($fg_color, $bg_color, 80%);
$scrollbar_slider_active_color: if($variant=='light', darken($selected_bg_color, 10%), lighten($selected_bg_color, 10%));

$warning_color: $yellow;
$error_color: $red;
$success_color: lighten($green, 5%);
$destructive_color: if($variant == 'light', $red, darken($red, 10%));

$osd_fg_color: #eeeeec;
$osd_text_color: white;
$osd_bg_color: transparentize(#252621, 0.2);
$osd_insensitive_bg_color: $osd_bg_color;
$osd_insensitive_fg_color: $osd_fg_color;
$osd_borders_color: transparentize(black, 0.3);

$sidebar_bg_color: mix($bg_color, $base_color, 50%);
$base_hover_color: transparentize($fg_color, 0.95);

$tooltip_borders_color: transparentize(white, 0.9);
$shadow_color: transparentize(black, 0.9);

$drop_target_color: $success_color;

//insensitive state derived colors
$insensitive_fg_color: gtkshade($core_color_b, 0.70);
$insensitive_bg_color: $bg_color;
$insensitive_borders_color: gtkshade($core_color_b, 0.79);

//colors for the backdrop state, derived from the main colors.
$backdrop_base_color: if($variant == 'light', darken($base_color, 1%), lighten($base_color, 3%));
$backdrop_text_color: if($variant == 'light', transparentize($text_color, 0.31), transparentize(white, 0.45));
$backdrop_bg_color: if($variant == 'light', $bg_color, lighten($bg_color, 3%));
$backdrop_fg_color: if($variant == 'light', mix($fg_color, $backdrop_bg_color, 80%), transparentize(white, 0.35));
$backdrop_insensitive_color: if($variant == 'light', darken($backdrop_bg_color, 15%), lighten($backdrop_bg_color, 15%));
$backdrop_selected_fg_color: if($variant == 'light', $backdrop_base_color, $backdrop_text_color);
$backdrop_borders_color: mix($borders_color, $bg_color, 80%);
$backdrop_dark_fill: mix($backdrop_borders_color, $backdrop_bg_color, 35%);
$backdrop_sidebar_bg_color: mix($backdrop_bg_color, $backdrop_base_color, 50%);

$backdrop_scrollbar_bg_color: darken($backdrop_bg_color, 3%);
$backdrop_scrollbar_slider_color: mix($backdrop_fg_color, $backdrop_bg_color, 40%);

$backdrop_menu_color: if($variant == 'light', $backdrop_base_color, mix($backdrop_bg_color, $backdrop_base_color, 20%));

//special cased widget colors
$suggested_bg_color: if($variant == 'light', lighten($green, 5%), darken($green, 5%));
$suggested_border_color: if($variant=='light', darken($suggested_bg_color, 5%), darken($suggested_bg_color, 10%));
$progress_bg_color: if($variant== 'light', lighten($secondary_accent_bg_color, 10%), lighten($secondary_accent_bg_color, 5%));
$progress_border_color: $selected_borders_color;
$checkradio_bg_color:  darken($core_color_a , 20%);;
$checkradio_fg_color: $borders_color;
$checkradio_borders_color:  $borders_color;
$focus_border_color:  $borders_color;
$coloured_focus_border_color: transparentize(white, 0.3);
// Headerbar bg colors for the "mixed" theme
$headerbar_bg_color: #323030;
$headerbar_fg_color: $fg_color;
$headerbar_border_color: $borders_color;
$headerbar_text_color: $silk;
$headerbar_insensitive_color: mix($headerbar_fg_color, $headerbar_bg_color, 50%);
$backdrop_headerbar_bg_color: lighten($headerbar_bg_color, 5%);
$backdrop_headerbar_fg_color: mix($headerbar_fg_color, $headerbar_bg_color, 70%);
$backdrop_headerbar_text_color: mix($headerbar_text_color, $backdrop_headerbar_bg_color, 70%);
$backdrop_headerbar_insensitive_color: mix($headerbar_fg_color, $backdrop_headerbar_bg_color, 70%);

//
// button
//
$button_gradient_a: gtkshade($core_color_b, 1.07);
$button_gradient_b: gtkshade($core_color_b, 1.06);
$button_gradient_c: gtkshade($core_color_b, 1.04);
$button_gradient_d: gtkshade($core_color_b, 0.98);

$button_default_border_color:  gtkshade($core_color_a, 0.5);
$button_default_box_shadow_color: gtkshade($core_color_a, 1.2);

/* hover */

$button_hover_gradient_a: $base_color;
$button_hover_gradient_b: gtkshade($core_color_b, 1.05);
$button_hover_gradient_c: $core_color_b;

/* active */

$button_active_text_color: $fg_color;

$button_active_gradient_a: gtkshade($core_color_b, 0.85);
$button_active_gradient_b: gtkshade($core_color_b, 0.90);
$button_active_gradient_c: gtkshade($core_color_b, 0.91);
$button_active_gradient_d: gtkshade($core_color_b, 0.86);
$button_active_gradient_e: gtkshade($core_color_b, 0.84);
$button_active_gradient_f: gtkshade($core_color_b, 0.80);

/* insensitive */

$button_insensitive_inner_border_color: gtkshade($core_color_b, 1.05);

$button_insensitive_gradient_a: gtkshade($core_color_b, 1.04);
$button_insensitive_gradient_b: gtkshade($core_color_b, 1.01);
$button_insensitive_gradient_c: gtkshade($core_color_b, 0.99);
$button_insensitive_gradient_d: gtkshade($core_color_b, 0.96);

/* active insensitive */

$button_active_insensitive_gradient_a: gtkshade($core_color_b, 0.98);
$button_active_insensitive_gradient_b: gtkshade($core_color_b, 1.02);
$button_active_insensitive_gradient_c: gtkshade($core_color_b, 1.03);
$button_active_insensitive_gradient_d: gtkshade($core_color_b, 1.01);
$button_active_insensitive_gradient_e: gtkshade($core_color_b, 0.99);
$button_active_insensitive_gradient_f: gtkshade($core_color_b, 0.96);

/* primary toolbar focus */

$pt_button_focus_gradient_a: mix(#fafafa, gtkshade($core_color_a, 1.09), 0.3);
$pt_button_focus_gradient_b: mix(#ededed, gtkshade($core_color_a, 1.05), 0.3);
$pt_button_focus_gradient_c: mix(#e8e8e8, gtkshade($core_color_a, 1.01), 0.25);
$pt_button_focus_gradient_d: mix(#e8e8e8, gtkshade($core_color_a, 0.96), 0.3);

/* primary toolbar focus hover */

$pt_button_focus_hover_gradient_a: mix(#fcfcfc, gtkshade($core_color_a, 1.09), 0.15);
$pt_button_focus_hover_gradient_b: mix(#fcfcfc, gtkshade($core_color_a, 1.05), 0.15);
$pt_button_focus_hover_gradient_c: mix(#fcfcfc, gtkshade($core_color_a, 1.01), 0.2);
$pt_button_focus_hover_gradient_d: mix(#e8e8e8, gtkshade($core_color_a, 0.96), 0.2);



//
// entry
//
$entry_text_color: $text_color;
$entry_inner_border_color: gtkshade($core_color_b, 0.96);
$entry_bg_color: $base_color;

//
// menu
//
$menu_color: gtkshade($core_color_b, 1.1);
$menu_bg_color: gtkshade($bg_color, 1.04);
$menu_fg_color: $fg_color;
$menu_border_color: gtkshade($core_color_b, 0.72);

//
// menubar
//

$menubar_gradient_a: gtkshade($core_color_b, 0.99);
$menubar_gradient_b: gtkshade($core_color_b, 0.98);
$menubar_gradient_c: gtkshade($core_color_b, 0.96);


$menubar_menuitem_hover_color: $selected_fg_color;
$menubar_menuitem_hover_border_color: gtkshade($core_color_a, 0.58);

$menubar_menuitem_hover_gradient_a: $core_color_a;
$menubar_menuitem_hover_gradient_b: gtkshade($core_color_a, 0.95);
$menubar_menuitem_hover_gradient_c: gtkshade($core_color_a, 0.93);
$menubar_menuitem_hover_gradient_d: gtkshade($core_color_a, 0.88);

//
// progressbar
//

$progressbar_border_color: mix(#6a6a6a, gtkshade($core_color_a, 0.75), 0.80);
$progressbar_pattern_color: $progressbar_border_color;

$progressbar_bg_color: $core_color_a;

$progressbar_gradient_a: $progressbar_bg_color;
$progressbar_gradient_b: $menubar_menuitem_hover_gradient_b;
$progressbar_gradient_c: $menubar_menuitem_hover_gradient_c;
$progressbar_gradient_d: $menubar_menuitem_hover_gradient_d;

//
// toolbar
//
$toolbar_gradient_a: gtkshade($core_color_b, 1.04);
$toolbar_gradient_b: gtkshade($core_color_b, 1.01);
$toolbar_gradient_c: $core_color_b;
$toolbar_gradient_d: gtkshade($core_color_b, 0.97);
$toolbar_border_top_color: gtkshade($core_color_b, 0.82);
$toolbar_border_bottom_color: $toolbar_border_top_color;


//notebook
$notebook_base_color: lighten($bg_color, 3%)