import { WorkspaceChannel } from '@/constants/channels';
import { PageType } from '@/constants/pageTypes';
import { SupportedStorageServices } from '@services/types';
import { ProxyPropertyType } from 'electron-ipc-cat/common';
import { BehaviorSubject, Observable } from 'rxjs';
import { SetOptional } from 'type-fest';

/**
 * Fields that not part of config that user can edit. Change of these field won't show "save" button on edit page.
 */
export const nonConfigFields = ['metadata', 'lastNodeJSArgv'];

/**
 * Fields that should be synced to wiki folder's tidgi.config.json.
 * These are user preferences that should follow the wiki across devices.
 *
 * ⚠️ IMPORTANT: When modifying this list, remember to also update:
 * - src/services/workspaces/tidgi.config.schema.json (JSON Schema definition)
 * - syncableConfigDefaultValues (default values)
 */
export const syncableConfigFields = [
  'name',
  'port',
  'gitUrl',
  'storageService',
  'userName',
  'readOnlyMode',
  'tokenAuth',
  'enableHTTPAPI',
  'enableFileSystemWatch',
  'ignoreSymlinks',
  'backupOnInterval',
  'syncOnInterval',
  'syncOnStartup',
  'disableAudio',
  'disableNotifications',
  'hibernateWhenUnused',
  'transparentBackground',
  'excludedPlugins',
  'tagNames',
  'includeTagTree',
  'fileSystemPathFilterEnable',
  'fileSystemPathFilter',
  'rootTiddler',
  'https',
] as const;

/**
 * Type for syncable config fields
 */
export type SyncableConfigField = typeof syncableConfigFields[number];

/**
 * Fields that are device-specific and should only be stored locally.
 */
export const localOnlyFields = [
  'id',
  'order',
  'active',
  'hibernated',
  'lastUrl',
  'lastNodeJSArgv',
  'homeUrl',
  'authToken',
  'picturePath',
  'wikiFolderLocation',
  'mainWikiToLink',
  'mainWikiID',
  'isSubWiki',
  'pageType',
] as const;

/**
 * Default values for syncable config fields (stored in tidgi.config.json)
 *
 * ⚠️ IMPORTANT: When modifying this object, remember to also update:
 * - src/services/workspaces/tidgi.config.schema.json (JSON Schema definition)
 * - syncableConfigFields (field list)
 */
export const syncableConfigDefaultValues = {
  name: '',
  port: 5212,
  gitUrl: null,
  storageService: SupportedStorageServices.local,
  userName: '',
  readOnlyMode: false,
  tokenAuth: false,
  enableHTTPAPI: false,
  enableFileSystemWatch: false,
  ignoreSymlinks: true,
  backupOnInterval: true,
  syncOnInterval: false,
  syncOnStartup: true,
  disableAudio: false,
  disableNotifications: false,
  hibernateWhenUnused: false,
  transparentBackground: false,
  excludedPlugins: [] as string[],
  tagNames: [] as string[],
  includeTagTree: false,
  fileSystemPathFilterEnable: false,
  fileSystemPathFilter: null as string | null,
  rootTiddler: undefined as string | undefined,
  https: undefined as { enabled: boolean; tlsCert?: string; tlsKey?: string } | undefined,
} as const;

/**
 * Type for syncable config
 *
 * ⚠️ IMPORTANT: This type is derived from syncableConfigDefaultValues.
 * When modifying types here, remember to also update:
 * - src/services/workspaces/tidgi.config.schema.json (JSON Schema definition)
 */
export type ISyncableWikiConfig = {
  -readonly [K in keyof typeof syncableConfigDefaultValues]: (typeof syncableConfigDefaultValues)[K];
};

/**
 * Default values for local-only fields (stored in database)
 */
export const localConfigDefaultValues = {
  id: '',
  order: 0,
  active: false,
  hibernated: false,
  lastUrl: null as string | null,
  lastNodeJSArgv: [] as string[],
  homeUrl: '',
  authToken: undefined as string | undefined,
  picturePath: null as string | null,
  mainWikiToLink: null as string | null,
  mainWikiID: null as string | null,
  pageType: null as PageType.wiki | null,
} as const;

/**
 * Default values for IWikiWorkspace fields. These are used for:
 * 1. Initializing new workspaces
 * 2. Providing default values when fields are missing from persisted config
 * 3. Determining which fields need to be saved (only non-default values are persisted)
 */
export const wikiWorkspaceDefaultValues = {
  ...localConfigDefaultValues,
  ...syncableConfigDefaultValues,
} satisfies Omit<IWikiWorkspace, 'wikiFolderLocation' | 'isSubWiki'>;

export interface IDedicatedWorkspace {
  /**
   * Is this workspace selected by user, and showing corresponding webview?
   */
  active: boolean;
  id: string;
  /**
   * Display name for this wiki workspace
   */
  name: string;
  /**
   * You can drag workspaces to reorder them
   */
  order: number;
  /**
   * If this workspace represents a page (like help, guide, agent), this field indicates the page type.
   * If null or undefined, this is a regular wiki workspace.
   */
  pageType?: PageType | null;
  /**
   * workspace icon's path in file system
   */
  picturePath: string | null;
}

/**
 * A workspace is basically a TiddlyWiki instance, it can be a local/online wiki (depends on git related config). Can be a mainWiki that starts a a TiddlyWiki instance or subwiki that link to a main wiki.
 *
 * New value added here can be init in `sanitizeWorkspace`
 */
export interface IWikiWorkspace extends IDedicatedWorkspace {
  authToken?: string;
  /**
   * When this workspace is a local workspace, we can still use local git to backup
   */
  backupOnInterval: boolean;
  disableAudio: boolean;
  disableNotifications: boolean;
  enableHTTPAPI: boolean;
  /**
   * List of plugins excluded on startup, for example `['$:/plugins/bimlas/kin-filter', '$:/plugins/dullroar/sitemap']`
   */
  excludedPlugins: string[];
  /**
   * The online repo to back data up to
   */
  gitUrl: string | null;
  /**
   * Hibernate workspace on startup and when switch to another workspace.
   */
  hibernateWhenUnused: boolean;
  /**
   * Is this workspace hibernated. You can hibernate workspace manually, without setting its hibernateWhenUnused. So we record this field in workspace.
   */
  hibernated: boolean;
  /**
   * Localhost server url to load in the electron webview
   */
  homeUrl: string;
  /**
   * Mostly used for deploying blog. Need tls-key and tls-cert.
   */
  https?: {
    enabled: boolean;
    tlsCert?: string;
    tlsKey?: string;
  };
  /**
   * Is this workspace a subwiki that link to a main wiki, and doesn't have its own webview?
   */
  isSubWiki: boolean;
  /**
   * Nodejs start argument cli, used to start tiddlywiki server in terminal
   */
  lastNodeJSArgv?: string[];
  /**
   * Last visited url, used for rememberLastPageVisited in preferences
   */
  lastUrl: string | null;
  /**
   * ID of main wiki of the sub-wiki. Only useful when isSubWiki === true
   */
  mainWikiID: string | null;
  /**
   * Absolute path of main wiki of the sub-wiki. Only useful when isSubWiki === true , this is the wiki repo that this subwiki's folder soft links to
   */
  mainWikiToLink: string | null;
  /**
   * For wiki workspaces, pageType is restricted to wiki type or null for regular wiki workspaces
   */
  pageType?: PageType.wiki | null;
  /**
   * Localhost tiddlywiki server port
   */
  port: number;
  /**
   * Make wiki readonly if readonly is true. This is normally used for server mode, so also enable gzip.
   *
   * The principle is to configure anonymous reads, but writes require a login, and then give an unguessable username and password to.
   *
   * @url https://wiki.zhiheng.io/static/TiddlyWiki%253A%2520Readonly%2520for%2520Node.js%2520Server.html
   */
  readOnlyMode: boolean;
  /**
   * The root tiddler for wiki. When missing, may use `$:/core/save/lazy-images`
   * @url https://tiddlywiki.com/#LazyLoading
   */
  rootTiddler?: string;
  /**
   * Storage service this workspace sync to
   */
  storageService: SupportedStorageServices;
  /**
   * Sync wiki every interval.
   * If this is false (false by default to save the CPU usage from chokidar watch), then sync will only happen if user manually trigger by click sync button in the wiki, or sync at the app open.
   */
  syncOnInterval: boolean;
  /**
   * Commit and Sync when App starts.
   */
  syncOnStartup: boolean;
  /**
   * Tag names in tiddlywiki's filesystemPath, tiddlers with any of these tags will be saved into this subwiki
   */
  tagNames: string[];
  /**
   * When enabled, tiddlers that are indirectly tagged (tag of tag of tag...) with any of this sub-wiki's tagNames
   * will also be saved to this sub-wiki. Uses the in-tagtree-of filter operator.
   * Applies when creating new tiddlers and when modifying existing ones (e.g., when tags change).
   */
  includeTagTree: boolean;
  /**
   * When enabled, also use fileSystemPathFilter expressions to match tiddlers, in addition to tagName/includeTagTree matching.
   * This allows more complex matching logic using TiddlyWiki filter expressions.
   */
  fileSystemPathFilterEnable: boolean;
  /**
   * TiddlyWiki filter expressions to match tiddlers for this workspace (one per line).
   * Example: `[in-tagtree-of[Calendar]!tag[Public]!tag[Draft]]`
   * Any matching filter will route the tiddler to this workspace.
   * Only used when fileSystemPathFilterEnable is true.
   */
  fileSystemPathFilter: string | null;
  /**
   * Use authenticated-user-header to provide `TIDGI_AUTH_TOKEN_HEADER` as header key to receive a value as username (we use it as token)
   */
  tokenAuth: boolean;
  transparentBackground: boolean;
  userName: string;
  /**
   * folder path for this wiki workspace
   */
  wikiFolderLocation: string;
  /**
   * Enable file system watching (experimental feature using chokidar)
   * When enabled, external file changes will be synced to the wiki automatically
   * This is an experimental feature and may have bugs
   */
  enableFileSystemWatch: boolean;
  /**
   * Symlinks are similar to shortcuts. The old version used them to implement sub-wiki functionality,
   * but the new version no longer needs them.You can manually delete legacy symlinks.
   * When enabled, the file system watcher will skip symlinks to avoid redundant file sync operations.
   */
  ignoreSymlinks: boolean;
}
export type IWorkspace = IWikiWorkspace | IDedicatedWorkspace;

/**
 * Type guard to check if a workspace is a wiki workspace
 */
export function isWikiWorkspace(workspace: IWorkspace): workspace is IWikiWorkspace {
  return 'wikiFolderLocation' in workspace;
}

/**
 * Type guard to check if a workspace is a dedicated workspace (like help, guide, agent pages)
 */
export function isDedicatedWorkspace(workspace: IWorkspace): workspace is IDedicatedWorkspace {
  return !isWikiWorkspace(workspace);
}

export interface IWorkspaceMetaData {
  badgeCount?: number;
  /**
   * Error message if this workspace fails loading
   */
  didFailLoadErrorMessage?: string | null | undefined;
  /**
   * indicating server or webpage is still loading
   */
  isLoading?: boolean;
  /**
   * Is restarting service for this workspace.
   */
  isRestarting?: boolean;
}

export type IWorkspaceWithMetadata = IWorkspace & {
  metadata: IWorkspaceMetaData;
};
export type IWorkspacesWithMetadata = Record<string, IWorkspaceWithMetadata>;

/**
 * Ignore some field that will assign default value in workspaceService.create, these field don't require to be filled in AddWorkspace form
 */
export type INewWikiWorkspaceConfig = SetOptional<
  Omit<IWikiWorkspace, 'active' | 'hibernated' | 'id' | 'lastUrl' | 'syncOnInterval' | 'syncOnStartup'>,
  | 'homeUrl'
  | 'transparentBackground'
  | 'picturePath'
  | 'disableNotifications'
  | 'disableAudio'
  | 'hibernateWhenUnused'
  | 'userName'
  | 'order'
  | 'ignoreSymlinks'
  | 'backupOnInterval'
  | 'enableHTTPAPI'
  | 'excludedPlugins'
  | 'includeTagTree'
  | 'fileSystemPathFilterEnable'
  | 'fileSystemPathFilter'
>;

/**
 * Manage workspace level preferences and workspace metadata.
 */
export interface IWorkspaceService {
  /** Enter a state that no workspace is active (show welcome page) */
  clearActiveWorkspace(oldActiveWorkspaceID: string | undefined): Promise<void>;
  /**
   * Check if a workspace exists by id
   * @param id workspace id to check
   * @returns true if workspace exists, false otherwise
   */
  exists(id: string): Promise<boolean>;
  countWorkspaces(): Promise<number>;
  create(newWorkspaceConfig: INewWikiWorkspaceConfig): Promise<IWorkspace>;
  get(id: string): Promise<IWorkspace | undefined>;
  get$(id: string): Observable<IWorkspace | undefined>;
  /**
   * Get active workspace, if no active workspace, return the first workspace. Only when workspace list is empty, return undefined.
   */
  getActiveWorkspace: () => Promise<IWorkspace | undefined>;
  /**
   * Only meant to be used in TidGi's services internally.
   */
  getActiveWorkspaceSync: () => IWorkspace | undefined;
  getAllMetaData: () => Promise<Record<string, Partial<IWorkspaceMetaData>>>;
  getByWikiFolderLocation(wikiFolderLocation: string): Promise<IWorkspace | undefined>;
  /**
   * Get workspace by human readable wiki name, if no workspace found, return undefined. If multiple workspace with same name, return the first one order by sidebar.
   */
  getByWikiName(wikiName: string): Promise<IWorkspace | undefined>;
  getFirstWorkspace: () => Promise<IWorkspace | undefined>;
  /**
   * Get parent workspace of a subWorkspace, if the workspace you provided is a main workspace, return undefined.
   * @param subWorkspace your workspace object
   */
  getMainWorkspace(subWorkspace: IWorkspace): IWorkspace | undefined;
  getMetaData: (id: string) => Promise<Partial<IWorkspaceMetaData>>;
  getNextWorkspace: (id: string) => Promise<IWorkspace | undefined>;
  getPreviousWorkspace: (id: string) => Promise<IWorkspace | undefined>;
  getSubWorkspacesAsList(workspaceID: string): Promise<IWikiWorkspace[]>;
  /**
   * Only meant to be used in TidGi's services internally.
   */
  getSubWorkspacesAsListSync(workspaceID: string): IWikiWorkspace[];
  getWorkspaces(): Promise<Record<string, IWorkspace>>;
  getWorkspacesAsList(): Promise<IWorkspace[]>;
  getWorkspacesWithMetadata(): IWorkspacesWithMetadata;
  /**
   * Initialize default page workspaces on first startup
   */
  initializeDefaultPageWorkspaces(): Promise<void>;
  /**
   * Open a tiddler in the workspace, open workspace's tag by default.
   */
  openWorkspaceTiddler(workspace: IWorkspace, title?: string): Promise<void>;
  remove(id: string): Promise<void>;
  removeWorkspacePicture(id: string): Promise<void>;
  set(id: string, workspace: IWorkspace, immediate?: boolean): Promise<void>;
  /**
   * Set new workspace to active, and make the old active workspace inactive
   * @param id id to active
   */
  setActiveWorkspace(id: string, oldActiveWorkspaceID: string | undefined): Promise<void>;
  setWorkspacePicture(id: string, sourcePicturePath: string): Promise<void>;
  setWorkspaces(newWorkspaces: Record<string, IWorkspace>): Promise<void>;
  update(id: string, workspaceSetting: Partial<IWorkspace>, immediate?: boolean): Promise<void>;
  updateMetaData: (id: string, options: Partial<IWorkspaceMetaData>) => Promise<void>;
  /**
   * Manually refresh the observable's content, that will be received by react component.
   */
  updateWorkspaceSubject(): void;
  workspaceDidFailLoad(id: string): Promise<boolean>;
  workspaces$: BehaviorSubject<IWorkspacesWithMetadata | undefined>;
}
export const WorkspaceServiceIPCDescriptor = {
  channel: WorkspaceChannel.name,
  properties: {
    clearActiveWorkspace: ProxyPropertyType.Function,
    countWorkspaces: ProxyPropertyType.Function,
    create: ProxyPropertyType.Function,
    get: ProxyPropertyType.Function,
    get$: ProxyPropertyType.Function$,
    getActiveWorkspace: ProxyPropertyType.Function,
    getAllMetaData: ProxyPropertyType.Function,
    getByWikiName: ProxyPropertyType.Function,
    getFirstWorkspace: ProxyPropertyType.Function,
    getMainWorkspace: ProxyPropertyType.Function,
    getMetaData: ProxyPropertyType.Function,
    getNextWorkspace: ProxyPropertyType.Function,
    getPreviousWorkspace: ProxyPropertyType.Function,
    getSubWorkspacesAsList: ProxyPropertyType.Function,
    getWorkspaces: ProxyPropertyType.Function,
    getWorkspacesAsList: ProxyPropertyType.Function,
    getWorkspacesWithMetadata: ProxyPropertyType.Function,
    initializeDefaultPageWorkspaces: ProxyPropertyType.Function,
    openWorkspaceTiddler: ProxyPropertyType.Function,
    remove: ProxyPropertyType.Function,
    removeWorkspacePicture: ProxyPropertyType.Function,
    set: ProxyPropertyType.Function,
    setActiveWorkspace: ProxyPropertyType.Function,
    setWorkspacePicture: ProxyPropertyType.Function,
    setWorkspaces: ProxyPropertyType.Function,
    update: ProxyPropertyType.Function,
    updateMetaData: ProxyPropertyType.Function,
    updateWorkspaceSubject: ProxyPropertyType.Value$,
    workspaceDidFailLoad: ProxyPropertyType.Function,
    workspaces$: ProxyPropertyType.Value$,
  },
};

/**
 * Apply default values to a wiki workspace, using the centralized defaults from wikiWorkspaceDefaultValues.
 * This ensures that missing fields get their default values when loading from persisted config.
 * @param workspace The workspace object that may have missing fields
 * @returns A new workspace object with defaults applied to missing fields
 */
export function applyWorkspaceDefaults(workspace: IWikiWorkspace): IWikiWorkspace {
  return { ...wikiWorkspaceDefaultValues, ...workspace };
}