import { autorun, computed, observable } from 'mobx';
import { ipcRenderer } from 'electron';
import { webContents } from '@electron/remote';
import normalizeUrl from 'normalize-url';
import { join } from 'path';
import ElectronWebView from 'react-electron-web-view';

import { todosStore } from '../features/todos';
import { isValidExternalURL } from '../helpers/url-helpers';
import UserAgent from './UserAgent';
import { DEFAULT_SERVICE_ORDER } from '../config';
import { ifUndefined } from '../jsUtils';
import { IRecipe } from './Recipe';

const debug = require('../preload-safe-debug')('Ferdium:Service');

interface DarkReaderInterface {
  brightness: number;
  contrast: number;
  sepia: number;
}

// TODO: Shouldn't most of these values default to what's defined in DEFAULT_SERVICE_SETTINGS?
export default class Service {
  id: string = '';

  recipe: IRecipe;

  _webview: ElectronWebView | null = null;

  timer: NodeJS.Timeout | null = null;

  events = {};

  @observable isAttached: boolean = false;

  @observable isActive: boolean = false; // Is current webview active

  @observable name: string = '';

  @observable unreadDirectMessageCount: number = 0;

  @observable unreadIndirectMessageCount: number = 0;

  @observable dialogTitle: string = '';

  @observable order: number = DEFAULT_SERVICE_ORDER;

  @observable isEnabled: boolean = true;

  @observable isMuted: boolean = false;

  @observable team: string = '';

  @observable customUrl: string = '';

  @observable isNotificationEnabled: boolean = true;

  @observable isBadgeEnabled: boolean = true;

  @observable trapLinkClicks: boolean = false;

  @observable isIndirectMessageBadgeEnabled: boolean = true;

  @observable iconUrl: string = '';

  @observable customIconUrl: string = '';

  @observable hasCustomUploadedIcon: boolean = false;

  @observable hasCrashed: boolean = false;

  @observable isDarkModeEnabled: boolean = false;

  @observable isProgressbarEnabled: boolean = true;

  @observable darkReaderSettings: DarkReaderInterface = {
    brightness: 100,
    contrast: 90,
    sepia: 10,
  };

  @observable spellcheckerLanguage: string | null = null;

  @observable isFirstLoad: boolean = true;

  @observable isLoading: boolean = true;

  @observable isLoadingPage: boolean = true;

  @observable isError: boolean = false;

  @observable errorMessage: string = '';

  @observable isUsingCustomUrl: boolean = false;

  @observable isServiceAccessRestricted: boolean = false;

  // todo is this used?
  @observable restrictionType = null;

  @observable isHibernationEnabled: boolean = false;

  @observable isWakeUpEnabled: boolean = true;

  @observable isHibernationRequested: boolean = false;

  @observable onlyShowFavoritesInUnreadCount: boolean = false;

  @observable lastUsed: number = Date.now(); // timestamp

  @observable lastHibernated: number | null = null; // timestamp

  @observable lastPoll: number = Date.now();

  @observable lastPollAnswer: number = Date.now();

  @observable lostRecipeConnection: boolean = false;

  @observable lostRecipeReloadAttempt: number = 0;

  @observable userAgentModel: UserAgent;

  @observable proxy: string | null = null;

  constructor(data, recipe: IRecipe) {
    if (!data) {
      throw new Error('Service config not valid');
    }

    if (!recipe) {
      throw new Error('Service recipe not valid');
    }

    this.recipe = recipe;

    this.userAgentModel = new UserAgent(recipe.overrideUserAgent);

    this.id = ifUndefined<string>(data.id, this.id);
    this.name = ifUndefined<string>(data.name, this.name);
    this.team = ifUndefined<string>(data.team, this.team);
    this.customUrl = ifUndefined<string>(data.customUrl, this.customUrl);
    this.iconUrl = ifUndefined<string>(data.iconUrl, this.iconUrl);
    this.order = ifUndefined<number>(data.order, this.order);
    this.isEnabled = ifUndefined<boolean>(data.isEnabled, this.isEnabled);
    this.isNotificationEnabled = ifUndefined<boolean>(
      data.isNotificationEnabled,
      this.isNotificationEnabled,
    );
    this.isBadgeEnabled = ifUndefined<boolean>(
      data.isBadgeEnabled,
      this.isBadgeEnabled,
    );
    this.trapLinkClicks = ifUndefined<boolean>(
      data.trapLinkClicks,
      this.trapLinkClicks,
    );
    this.isIndirectMessageBadgeEnabled = ifUndefined<boolean>(
      data.isIndirectMessageBadgeEnabled,
      this.isIndirectMessageBadgeEnabled,
    );
    this.isMuted = ifUndefined<boolean>(data.isMuted, this.isMuted);
    this.isDarkModeEnabled = ifUndefined<boolean>(
      data.isDarkModeEnabled,
      this.isDarkModeEnabled,
    );
    this.darkReaderSettings = ifUndefined<DarkReaderInterface>(
      data.darkReaderSettings,
      this.darkReaderSettings,
    );
    this.isProgressbarEnabled = ifUndefined<boolean>(
      data.isProgressbarEnabled,
      this.isProgressbarEnabled,
    );
    this.hasCustomUploadedIcon = ifUndefined<boolean>(
      data.iconId?.length > 0,
      this.hasCustomUploadedIcon,
    );
    this.onlyShowFavoritesInUnreadCount = ifUndefined<boolean>(
      data.onlyShowFavoritesInUnreadCount,
      this.onlyShowFavoritesInUnreadCount,
    );
    this.proxy = ifUndefined<string | null>(data.proxy, this.proxy);
    this.spellcheckerLanguage = ifUndefined<string | null>(
      data.spellcheckerLanguage,
      this.spellcheckerLanguage,
    );
    this.userAgentPref = ifUndefined<string | null>(
      data.userAgentPref,
      this.userAgentPref,
    );
    this.isHibernationEnabled = ifUndefined<boolean>(
      data.isHibernationEnabled,
      this.isHibernationEnabled,
    );
    this.isWakeUpEnabled = ifUndefined<boolean>(
      data.isWakeUpEnabled,
      this.isWakeUpEnabled,
    );

    // Check if "Hibernate on Startup" is enabled and hibernate all services except active one
    const { hibernateOnStartup } = window['ferdium'].stores.settings.app;
    // The service store is probably not loaded yet so we need to use localStorage data to get active service
    const isActive =
      window.localStorage.service &&
      JSON.parse(window.localStorage.service).activeService === this.id;
    if (hibernateOnStartup && !isActive) {
      this.isHibernationRequested = true;
    }

    autorun((): void => {
      if (!this.isEnabled) {
        this.webview = null;
        this.isAttached = false;
        this.unreadDirectMessageCount = 0;
        this.unreadIndirectMessageCount = 0;
      }

      if (this.recipe.hasCustomUrl && this.customUrl) {
        this.isUsingCustomUrl = true;
      }
    });
  }

  @computed get shareWithWebview(): object {
    return {
      id: this.id,
      spellcheckerLanguage: this.spellcheckerLanguage,
      isDarkModeEnabled: this.isDarkModeEnabled,
      isProgressbarEnabled: this.isProgressbarEnabled,
      darkReaderSettings: this.darkReaderSettings,
      team: this.team,
      url: this.url,
      hasCustomIcon: this.hasCustomIcon,
      onlyShowFavoritesInUnreadCount: this.onlyShowFavoritesInUnreadCount,
      trapLinkClicks: this.trapLinkClicks,
    };
  }

  @computed get isTodosService(): boolean {
    return this.recipe.id === todosStore.todoRecipeId;
  }

  @computed get canHibernate(): boolean {
    return this.isHibernationEnabled;
  }

  @computed get isHibernating(): boolean {
    return this.canHibernate && this.isHibernationRequested;
  }

  get webview(): ElectronWebView | null {
    if (this.isTodosService) {
      return todosStore.webview;
    }

    return this._webview;
  }

  set webview(webview) {
    this._webview = webview;
  }

  @computed get url(): string {
    if (this.recipe.hasCustomUrl && this.customUrl) {
      let url: string = '';
      try {
        url = normalizeUrl(this.customUrl, {
          stripAuthentication: false,
          stripWWW: false,
          removeTrailingSlash: false,
        });
      } catch {
        console.error(
          `Service (${this.recipe.name}): '${this.customUrl}' is not a valid Url.`,
        );
      }

      const { buildUrl } = this.recipe;
      if (typeof buildUrl === 'function') {
        url = buildUrl(url);
      }

      return url;
    }

    if (this.recipe.hasTeamId && this.team) {
      return this.recipe.serviceURL.replace('{teamId}', this.team);
    }

    return this.recipe.serviceURL;
  }

  @computed get icon(): string {
    if (this.iconUrl) {
      return this.iconUrl;
    }

    return join(this.recipe.path, 'icon.svg');
  }

  @computed get hasCustomIcon(): boolean {
    return Boolean(this.iconUrl);
  }

  @computed get userAgent(): string {
    return this.userAgentModel.userAgent;
  }

  @computed get userAgentPref(): string | null {
    return this.userAgentModel.userAgentPref;
  }

  set userAgentPref(pref) {
    this.userAgentModel.userAgentPref = pref;
  }

  @computed get defaultUserAgent(): string {
    return this.userAgentModel.defaultUserAgent;
  }

  @computed get partition(): string {
    return this.recipe.partition || `persist:service-${this.id}`;
  }

  initializeWebViewEvents({ handleIPCMessage, openWindow, stores }): void {
    const webviewWebContents = webContents.fromId(
      this.webview.getWebContentsId(),
    );

    this.userAgentModel.setWebviewReference(this.webview);

    // If the recipe has implemented 'modifyRequestHeaders',
    // Send those headers to ipcMain so that it can be set in session
    if (typeof this.recipe.modifyRequestHeaders === 'function') {
      const modifiedRequestHeaders = this.recipe.modifyRequestHeaders();
      debug(this.name, 'modifiedRequestHeaders', modifiedRequestHeaders);
      ipcRenderer.send('modifyRequestHeaders', {
        modifiedRequestHeaders,
        serviceId: this.id,
      });
    } else {
      debug(this.name, 'modifyRequestHeaders is not defined in the recipe');
    }

    // if the recipe has implemented 'knownCertificateHosts'
    if (typeof this.recipe.knownCertificateHosts === 'function') {
      const knownHosts = this.recipe.knownCertificateHosts();
      debug(this.name, 'knownCertificateHosts', knownHosts);
      ipcRenderer.send('knownCertificateHosts', {
        knownHosts,
        serviceId: this.id,
      });
    } else {
      debug(this.name, 'knownCertificateHosts is not defined in the recipe');
    }

    this.webview.addEventListener('ipc-message', async e => {
      if (e.channel === 'inject-js-unsafe') {
        await Promise.all(
          e.args.map(script =>
            this.webview.executeJavaScript(
              `"use strict"; (() => { ${script} })();`,
            ),
          ),
        );
      } else {
        handleIPCMessage({
          serviceId: this.id,
          channel: e.channel,
          args: e.args,
        });
      }
    });

    this.webview.addEventListener(
      'new-window',
      (event, url, frameName, options) => {
        debug('new-window', event, url, frameName, options);
        if (!isValidExternalURL(event.url)) {
          return;
        }
        if (
          event.disposition === 'foreground-tab' ||
          event.disposition === 'background-tab'
        ) {
          openWindow({
            event,
            url,
            frameName,
            options,
          });
        } else {
          ipcRenderer.send('open-browser-window', {
            url: event.url,
            serviceId: this.id,
          });
        }
      },
    );

    this.webview.addEventListener('did-start-loading', event => {
      debug('Did start load', this.name, event);

      this.hasCrashed = false;
      this.isLoading = true;
      this.isLoadingPage = true;
      this.isError = false;
    });

    this.webview.addEventListener('did-stop-loading', event => {
      debug('Did stop load', this.name, event);

      this.isLoading = false;
      this.isLoadingPage = false;
    });

    // eslint-disable-next-line unicorn/consistent-function-scoping
    const didLoad = () => {
      this.isLoading = false;
      this.isLoadingPage = false;

      if (!this.isError) {
        this.isFirstLoad = false;
      }
    };

    this.webview.addEventListener('did-frame-finish-load', didLoad.bind(this));
    this.webview.addEventListener('did-navigate', didLoad.bind(this));

    this.webview.addEventListener('did-fail-load', event => {
      debug('Service failed to load', this.name, event);
      if (
        event.isMainFrame &&
        event.errorCode !== -21 &&
        event.errorCode !== -3
      ) {
        this.isError = true;
        this.errorMessage = event.errorDescription;
        this.isLoading = false;
        this.isLoadingPage = false;
      }
    });

    this.webview.addEventListener('crashed', () => {
      debug('Service crashed', this.name);
      this.hasCrashed = true;
    });

    this.webview.addEventListener('found-in-page', ({ result }) => {
      debug('Found in page', result);
      this.webview.send('found-in-page', result);
    });

    webviewWebContents.on('login', (event, _, authInfo, callback) => {
      // const authCallback = callback;
      debug('browser login event', authInfo);
      event.preventDefault();

      if (authInfo.isProxy && authInfo.scheme === 'basic') {
        debug('Sending service echo ping');
        webviewWebContents.send('get-service-id');

        debug('Received service id', this.id);

        const ps = stores.settings.proxy[this.id];

        if (ps) {
          debug('Sending proxy auth callback for service', this.id);
          callback(ps.user, ps.password);
        } else {
          debug('No proxy auth config found for', this.id);
        }
      }
    });
  }

  initializeWebViewListener(): void {
    if (this.webview && this.recipe.events) {
      for (const eventName of Object.keys(this.recipe.events)) {
        const eventHandler = this.recipe[this.recipe.events[eventName]];
        if (typeof eventHandler === 'function') {
          this.webview.addEventListener(eventName, eventHandler);
        }
      }
    }
  }

  resetMessageCount(): void {
    this.unreadDirectMessageCount = 0;
    this.unreadIndirectMessageCount = 0;
  }
}