import type { TemplateResult } from '@design.estate/dees-element';
import type { IAppBarMenuItem } from './appbarmenuitem.js';
import type { ITab } from './tab.js';
import type { ISecondaryMenuGroup } from './secondarymenu.js';

/**
 * User configuration for the app bar
 */
export interface IAppUser {
  name: string;
  email?: string;
  avatar?: string;
  status?: 'online' | 'offline' | 'busy' | 'away';
}

/**
 * View definition for the view registry
 */
export interface IViewDefinition {
  /** Unique identifier for routing */
  id: string;
  /** Display name */
  name: string;
  /** Optional icon */
  iconName?: string;
  /** The view content - can be a tag name, element class, or template function */
  content: string | (new () => HTMLElement) | (() => TemplateResult);
  /** Secondary menu items specific to this view */
  secondaryMenu?: ISecondaryMenuGroup[];
  /** Content tabs specific to this view */
  contentTabs?: ITab[];
  /** Optional route path (defaults to id) */
  route?: string;
  /** Badge to show on menu item */
  badge?: string | number;
  badgeVariant?: 'default' | 'success' | 'warning' | 'error';
}

/**
 * Main menu section with view references
 */
export interface IMainMenuSection {
  /** Section name (optional for ungrouped) */
  name?: string;
  /** Views in this section (by ID reference) */
  views: string[];
}

/**
 * Main menu configuration
 */
export interface IMainMenuConfig {
  /** Menu sections with view references */
  sections?: IMainMenuSection[];
  /** Bottom pinned items (view IDs) */
  bottomItems?: string[];
}

/**
 * App bar configuration
 */
export interface IAppBarConfig {
  menuItems?: IAppBarMenuItem[];
  breadcrumbs?: string;
  breadcrumbSeparator?: string;
  showWindowControls?: boolean;
  showSearch?: boolean;
  user?: IAppUser;
  profileMenuItems?: IAppBarMenuItem[];
}

/**
 * Branding configuration
 */
export interface IBrandingConfig {
  logoIcon?: string;
  logoText?: string;
}

/**
 * Routing configuration
 */
export interface IRoutingConfig {
  /** Routing mode */
  mode: 'hash' | 'history' | 'external' | 'none';
  /** Base path for history mode */
  basePath?: string;
  /** Default view ID to show on startup */
  defaultView?: string;
  /** Sync URL on view change */
  syncUrl?: boolean;
  /** Handle 404s - show view ID or callback */
  notFound?: string | (() => void);
}

/**
 * State persistence configuration
 */
export interface IStatePersistenceConfig {
  /** Enable state persistence */
  enabled: boolean;
  /** Storage key prefix */
  storageKey?: string;
  /** Storage type */
  storage?: 'localStorage' | 'sessionStorage' | 'memory';
  /** What to persist */
  persist?: {
    mainMenuCollapsed?: boolean;
    secondaryMenuCollapsed?: boolean;
    selectedView?: boolean;
    secondaryMenuSelection?: boolean;
    collapsedGroups?: boolean;
  };
}

/**
 * Activity log configuration
 */
export interface IActivityLogConfig {
  enabled?: boolean;
  width?: number;
}

/**
 * Main unified configuration interface for dees-appui-base
 */
export interface IAppConfig {
  /** Application branding */
  branding?: IBrandingConfig;

  /** App bar configuration */
  appBar?: IAppBarConfig;

  /** View definitions (the registry) */
  views: IViewDefinition[];

  /** Main menu structure */
  mainMenu?: IMainMenuConfig;

  /** Routing configuration */
  routing?: IRoutingConfig;

  /** State persistence configuration */
  statePersistence?: IStatePersistenceConfig;

  /** Activity log configuration */
  activityLog?: IActivityLogConfig;

  /** Event callbacks (optional shorthand) */
  onViewChange?: (viewId: string, view: IViewDefinition) => void;
  onSearch?: () => void;
}

/**
 * Serialized UI state for persistence
 */
export interface IAppUIState {
  /** Current view ID */
  currentViewId?: string;
  /** Main menu collapsed state */
  mainMenuCollapsed?: boolean;
  /** Secondary menu collapsed state */
  secondaryMenuCollapsed?: boolean;
  /** Selected secondary menu item key */
  secondaryMenuSelectedKey?: string;
  /** Collapsed group names in secondary menu */
  collapsedGroups?: string[];
  /** Timestamp of last save */
  timestamp?: number;
}

/**
 * Route change event detail
 */
export interface IRouteChangeEvent {
  viewId: string;
  previousViewId: string | null;
  params?: Record<string, string>;
  source: 'navigation' | 'popstate' | 'initial' | 'programmatic';
}

/**
 * View change event detail
 */
export interface IViewChangeEvent {
  viewId: string;
  view: IViewDefinition;
  previousView?: IViewDefinition;
}