import * as Electron from 'electron';
import log from 'electron-log';
import * as windowStateKeeper from 'electron-window-state';

import { BrowserWindowChannel, AppChannel } from '@ucap/electron-core';
import { AppApi, BrowserWindowApi, IpcMainApi } from '@ucap/electron-common';
import { WindowState } from '@ucap/native';
import { WindowChannel } from '@ucap/electron-native';
import { AppLoggerService } from '../services/app-logger.service';

const MIN_WIDTH = 420;
const MIN_HEIGHT = 640;
const DEFAULT_WIDTH = 820;
const DEFAULT_HEIGHT = 650;

let savedWindowState: windowStateKeeper.State;

@BrowserWindowApi.BrowserWindowSettings({
  constructorOptions: (appConfiguration: AppApi.AppConfiguration) => {
    savedWindowState = windowStateKeeper({
      defaultWidth: DEFAULT_WIDTH,
      defaultHeight: DEFAULT_HEIGHT
    });

    return {
      x: savedWindowState.x,
      y: savedWindowState.y,
      width: savedWindowState.width,
      height: savedWindowState.height,
      minWidth: MIN_WIDTH,
      minHeight: MIN_HEIGHT,
      center: true,
      backgroundColor: '#fff',
      webPreferences: {
        // Disable auxclick event
        // See https://developers.google.com/web/updates/2016/10/auxclick
        disableBlinkFeatures: 'Auxclick',
        // Enable, among other things, the ResizeObserver
        experimentalFeatures: true,
        nodeIntegration: true
      },
      acceptFirstMouse: true,
      icon: appConfiguration.assets.appIcon,
      titleBarStyle: __DARWIN__ ? 'hidden' : 'default',
      frame: __WIN32__ || __LINUX__ ? false : true
    };
  }
})
export class AppWindow implements BrowserWindowApi.ElectronBrowserWindow {
  static readonly ucapClassName: string = 'appWindow';

  appLoggerService: AppLoggerService;

  constructor(
    private configuration: BrowserWindowApi.BrowserWindowConfiguration,
    public native: Electron.BrowserWindow
  ) {
    savedWindowState.manage(native);
  }

  @BrowserWindowApi.On(BrowserWindowChannel.readyToShow)
  onReadyToShow() {
    log.info('BrowserWindowChannel.ReadyToShow');
  }

  @BrowserWindowApi.On(BrowserWindowChannel.close)
  onClose() {
    log.info('BrowserWindowChannel.Close');
  }

  @BrowserWindowApi.On(BrowserWindowChannel.closed)
  onClosed() {
    log.info('BrowserWindowChannel.Closed');
  }

  @BrowserWindowApi.On(BrowserWindowChannel.focus)
  onFocus() {
    this.sendWindowFocus(true);
  }

  @BrowserWindowApi.On(BrowserWindowChannel.blur)
  onBlur() {
    this.sendWindowFocus(false);
  }

  @BrowserWindowApi.On(BrowserWindowChannel.enterFullScreen)
  onEnterFullScreen() {
    this.sendWindowState(WindowState.FullScreen);
  }

  @BrowserWindowApi.On(BrowserWindowChannel.leaveFullScreen)
  onLeaveFullScreen() {
    this.sendWindowState(this.windowState());
  }

  @BrowserWindowApi.On(BrowserWindowChannel.minimize)
  onMinimize() {
    this.sendWindowState(WindowState.Minimized);
  }

  @BrowserWindowApi.On(BrowserWindowChannel.maximize)
  onMaximize() {
    this.sendWindowState(WindowState.Maximized);
  }

  @BrowserWindowApi.On(BrowserWindowChannel.unmaximize)
  onUnmaximize() {
    this.sendWindowState(WindowState.Normal);
  }

  @BrowserWindowApi.On(BrowserWindowChannel.restore)
  onRestore() {
    this.sendWindowState(WindowState.Normal);
  }

  @BrowserWindowApi.On(BrowserWindowChannel.hide)
  onHide() {
    this.sendWindowState(WindowState.Hidden);
  }

  @BrowserWindowApi.On(BrowserWindowChannel.show)
  onShow() {
    this.sendWindowState(this.windowState());
  }

  @IpcMainApi.Handle(WindowChannel.state)
  async handleState(event: Electron.IpcMainEvent): Promise<WindowState> {
    this.appLoggerService.debug('handleState');
    return this.windowState();
  }

  @IpcMainApi.Handle(WindowChannel.focused)
  async handleFocused(event: Electron.IpcMainEvent): Promise<boolean> {
    this.appLoggerService.debug('handleFocused');
    return this.native.isFocused();
  }

  private attachHandlers() {
    this.attachAppHandlers();
  }

  private attachAppHandlers() {
    Electron.app.on(AppChannel.beforeQuit, (event: Electron.Event) => {
      log.info('AppChannel.BeforeQuit');
    });
  }

  private sendWindowFocus(focus: boolean) {
    this.native.webContents.send(WindowChannel.onFocus$, focus);
  }

  private sendWindowState(windowState: WindowState) {
    this.native.webContents.send(WindowChannel.onState$, windowState);
  }

  private windowState(): WindowState {
    if (this.native.isFullScreen()) {
      return WindowState.FullScreen;
    } else if (this.native.isMaximized()) {
      return WindowState.Maximized;
    } else if (this.native.isMinimized()) {
      return WindowState.Minimized;
    } else if (!this.native.isVisible()) {
      return WindowState.Hidden;
    } else {
      return WindowState.Normal;
    }
  }
}