import { Ctx } from '../ctx/base';
import {
  isArray,
  isNullish,
  isNumber,
  isPlacement,
  isRecord,
  isString,
} from '../guardUtils.js';
import { Icon, isIcon } from '../icon';

export type MainNavigationTabsHook = {
  /**
   * Use this function to declare new tabs you want to add in the top-bar of the
   * UI
   *
   * @tag pages
   */
  mainNavigationTabs: (ctx: MainNavigationTabsCtx) => MainNavigationTab[];
};

export type MainNavigationTabsCtx = Ctx;

/**
 * An object expressing a tab to be displayed in the top-bar of the UI
 *
 * @see {isMainNavigationTab}
 */
export type MainNavigationTab = {
  /** Label to be shown. Must be unique. */
  label: string;
  /**
   * Icon to be shown alongside the label. Can be a FontAwesome icon name (ie.
   * `"address-book"`) or a custom SVG definition. To maintain visual
   * consistency with the rest of the interface, try to use FontAwesome icons
   * whenever possible.
   */
  icon: Icon;
  /** ID of the page/inspector linked to the tab */
  pointsTo:
    | {
        pageId: string;
      }
    | {
        inspectorId: string;
        /** The preferred width for the sidebar */
        preferredWidth?: number;
        /** The inspector panel to render when first loaded */
        initialInspectorPanel?: {
          /** ID of the inspector panel to render */
          panelId: string;
          /**
           * An arbitrary configuration object that will be passed as the `parameters`
           * property of the second argument of the `renderInspectorPanel` function
           */
          parameters?: Record<string, unknown>;
        };
      };
  /**
   * Expresses where you want to place the tab in the top-bar. If not specified,
   * the tab will be placed after the standard tabs provided by DatoCMS itself.
   */
  placement?: [
    'before' | 'after',
    'content' | 'media' | 'schema' | 'configuration' | 'cdaPlayground',
  ];
  /**
   * If different plugins specify the same `placement` for their tabs, they will
   * be displayed by ascending `rank`. If you want to specify an explicit value
   * for `rank`, make sure to offer a way for final users to customize it inside
   * the plugin's settings form, otherwise the hardcoded value you choose might
   * clash with the one of another plugin!
   */
  rank?: number;
};

export function isMainNavigationTab(
  value: unknown,
): value is MainNavigationTab {
  return (
    isRecord(value) &&
    isString(value.label) &&
    isIcon(value.icon) &&
    isRecord(value.pointsTo) &&
    (isString(value.pointsTo.pageId) ||
      (isString(value.pointsTo.inspectorId) &&
        (isNullish(value.pointsTo.preferredWidth) ||
          isNumber(value.pointsTo.preferredWidth)))) &&
    (isNullish(value.placement) || isPlacement(value.placement)) &&
    (isNullish(value.rank) || isNumber(value.rank))
  );
}

export function isReturnTypeOfMainNavigationTabsHook(
  value: unknown,
): value is MainNavigationTab[] {
  return isArray(value, isMainNavigationTab);
}