/**
 * @license
 * Copyright Akveo. All Rights Reserved.
 * Licensed under the MIT License. See License.txt in the project root for license information.
 */

@use 'sass:list';
@use 'sass:map';
@use '../../themes/mapping';
@use '../../theming-variables';
@use '../functions';

@function nb-get-enabled-themes() {
  @if (list.length(theming-variables.$nb-enabled-themes) == 0) {
    @each $theme-name, $theme in theming-variables.$nb-themes {
      theming-variables.$nb-enabled-themes: list.append(theming-variables.$nb-enabled-themes, $theme-name);
    }
  }
  @return theming-variables.$nb-enabled-themes;
}

@function get-last-enabled-theme() {
  $themes: nb-get-enabled-themes();
  @return list.nth($themes, list.length($themes));
}

@function nb-set-for-export($theme, $name, $parent-name: null) {
  $parent-theme: map.get(theming-variables.$nb-themes-export, $parent-name);
  @if ($parent-theme != null) {
    $theme: map.merge(map.get($parent-theme, data), $theme);
  }

  $theme-data: (
    data: $theme,
    parent: $parent-name,
  );
  @return functions.map-set(theming-variables.$nb-themes-export, $name, $theme-data);
}

@function nb-get-registered-theme($name) {
  $theme: map.get(theming-variables.$nb-themes, $name);

  // TODO: check if optimal place
  @if ($theme == null) {
    @error 'Nebular Theme: theme `' + $name + '` is not registered with `nb-register-theme` function.';
  }

  @return $theme;
}

// Entry point
// Registers a new theme
@function nb-register-theme($theme, $name, $parent-name: null) {
  @if (theming-variables.$nb-theme-export-mode == true) {
    theming-variables.$nb-themes-export: nb-set-for-export($theme, $name, $parent-name);
  }

  $theme-data: ();

  @if ($parent-name != null) {
    $parent-theme: map.get(theming-variables.$nb-themes, $parent-name);
    @if ($parent-theme == null) {
      @error 'Nebular Theme: parent theme `' + $parent-name + '` is not registered or imported.';
    }
    $theme: map.merge($parent-theme, $theme);
  }
  $theme: map.merge(mapping.$eva-mapping, $theme);
  $nb-themes: functions.map-set(theming-variables.$nb-themes, $name, $theme) !global;

  @return $nb-themes;
}