import { action, makeAutoObservable, observable } from 'mobx';
import { ExtensionsLatestVersions } from '@/preferences/panes/extensions-segments';
import {
  ComponentArea,
  ContentType,
  FeatureIdentifier,
  SNComponent,
  IconType,
} from '@standardnotes/snjs';
import { WebApplication } from '@/ui_models/application';

const PREFERENCE_IDS = [
  'general',
  'account',
  'security',
  'appearance',
  'backups',
  'listed',
  'shortcuts',
  'accessibility',
  'get-free-month',
  'help-feedback',
] as const;

export type PreferenceId = typeof PREFERENCE_IDS[number];
interface PreferencesMenuItem {
  readonly id: PreferenceId | FeatureIdentifier;
  readonly icon: IconType;
  readonly label: string;
}

interface SelectableMenuItem extends PreferencesMenuItem {
  selected: boolean;
}

/**
 * Items are in order of appearance
 */
const PREFERENCES_MENU_ITEMS: PreferencesMenuItem[] = [
  { id: 'account', label: 'Account', icon: 'user' },
  { id: 'general', label: 'General', icon: 'settings' },
  { id: 'security', label: 'Security', icon: 'security' },
  { id: 'appearance', label: 'Appearance', icon: 'themes' },
  { id: 'backups', label: 'Backups', icon: 'restore' },
  { id: 'listed', label: 'Listed', icon: 'listed' },
  { id: 'shortcuts', label: 'Shortcuts', icon: 'keyboard' },
  { id: 'accessibility', label: 'Accessibility', icon: 'accessibility' },
  { id: 'get-free-month', label: 'Get a free month', icon: 'star' },
  { id: 'help-feedback', label: 'Help & feedback', icon: 'help' },
];

const READY_PREFERENCES_MENU_ITEMS: PreferencesMenuItem[] = [
  { id: 'account', label: 'Account', icon: 'user' },
  { id: 'general', label: 'General', icon: 'settings' },
  { id: 'security', label: 'Security', icon: 'security' },
  { id: 'appearance', label: 'Appearance', icon: 'themes' },
  { id: 'backups', label: 'Backups', icon: 'restore' },
  { id: 'listed', label: 'Listed', icon: 'listed' },
  { id: 'help-feedback', label: 'Help & feedback', icon: 'help' },
];

export class PreferencesMenu {
  private _selectedPane: PreferenceId | FeatureIdentifier = 'account';
  private _extensionPanes: SNComponent[] = [];
  private _menu: PreferencesMenuItem[];
  private _extensionLatestVersions: ExtensionsLatestVersions =
    new ExtensionsLatestVersions(new Map());

  constructor(
    private application: WebApplication,
    private readonly _enableUnfinishedFeatures: boolean
  ) {
    this._menu = this._enableUnfinishedFeatures
      ? PREFERENCES_MENU_ITEMS
      : READY_PREFERENCES_MENU_ITEMS;

    this.loadExtensionsPanes();
    this.loadLatestVersions();

    makeAutoObservable<
      PreferencesMenu,
      | '_selectedPane'
      | '_twoFactorAuth'
      | '_extensionPanes'
      | '_extensionLatestVersions'
      | 'loadLatestVersions'
    >(this, {
      _twoFactorAuth: observable,
      _selectedPane: observable,
      _extensionPanes: observable.ref,
      _extensionLatestVersions: observable.ref,
      loadLatestVersions: action,
    });
  }

  private loadLatestVersions(): void {
    ExtensionsLatestVersions.load(this.application).then((versions) => {
      this._extensionLatestVersions = versions;
    });
  }

  get extensionsLatestVersions(): ExtensionsLatestVersions {
    return this._extensionLatestVersions;
  }

  loadExtensionsPanes(): void {
    const excludedComponents = [
      FeatureIdentifier.TwoFactorAuthManager,
      'org.standardnotes.batch-manager',
      'org.standardnotes.extensions-manager',
      FeatureIdentifier.CloudLink,
    ];
    this._extensionPanes = (
      this.application.getItems([
        ContentType.ActionsExtension,
        ContentType.Component,
        ContentType.Theme,
      ]) as SNComponent[]
    ).filter(
      (extension) =>
        extension.area === ComponentArea.Modal &&
        !excludedComponents.includes(extension.package_info.identifier)
    );
  }

  get menuItems(): SelectableMenuItem[] {
    const menuItems = this._menu.map((preference) => ({
      ...preference,
      selected: preference.id === this._selectedPane,
    }));
    const extensionsMenuItems: SelectableMenuItem[] = this._extensionPanes.map(
      (extension) => {
        return {
          icon: 'window',
          id: extension.package_info.identifier,
          label: extension.name,
          selected: extension.package_info.identifier === this._selectedPane,
        };
      }
    );

    return menuItems.concat(extensionsMenuItems);
  }

  get selectedMenuItem(): PreferencesMenuItem | undefined {
    return this._menu.find((item) => item.id === this._selectedPane);
  }

  get selectedExtension(): SNComponent | undefined {
    return this._extensionPanes.find(
      (extension) => extension.package_info.identifier === this._selectedPane
    );
  }

  get selectedPaneId(): PreferenceId | FeatureIdentifier {
    if (this.selectedMenuItem != undefined) {
      return this.selectedMenuItem.id;
    }

    if (this.selectedExtension != undefined) {
      return this.selectedExtension.package_info.identifier;
    }

    return 'account';
  }

  selectPane(key: PreferenceId | FeatureIdentifier): void {
    this._selectedPane = key;
  }
}