import * as vscode from 'vscode';
import * as os from 'os';
import RemoteContainer from './remote-container';
import User from './user';
import * as utils from './utils'

export default class DSHome {
  private context: vscode.ExtensionContext;
  private remoteContainer: RemoteContainer;
  private user:User;
  static defaultUrl = 'http://localhost:8080/test/index.html';

  constructor(context: vscode.ExtensionContext) {
    this.context = context;
    this.user = new User(context);
    this.remoteContainer = new RemoteContainer(this.user);
  }

  async toggle(url: string = DSHome.defaultUrl) {
    console.log(url);
    const panel = vscode.window.createWebviewPanel(
      'homeWebview',
      'Home',
      vscode.ViewColumn.One,
      {
        enableScripts: true,
      }
    );

    utils.fetch(url).then(async (content) => {
      panel.webview.html = await this.getWebviewContent(content);
    })

    panel.webview.onDidReceiveMessage(
      async (message) => {
        const data = message.data
        switch (message.command) {
          // ----------------- frequent -----------------------
          case 'getUserToken':
            const userToken = this.user.getUserTokenFromLocal()
            if (userToken === undefined) {
              panel.webview.postMessage({ command: 'getUserToken', data: {userToken: ''}})
              break;
            } else {
              panel.webview.postMessage({ command: 'getUserToken', data: {userToken: userToken}})
              break;
            }
          case 'getUsername':
            const username = this.user.getUsernameFromLocal()
            if (username === undefined) {
              panel.webview.postMessage({command: 'getUsername', data: {username: ''}})
              break;
            } else {
              panel.webview.postMessage({command: 'getUsername', data: {username: username}})
              break;
            }
          case 'firstOpenRemoteFolder':
            await this.remoteContainer.firstConnect(data.host, data.username, data.port)
            .then((_res) => {
              if (_res == 'success') {
                //  only success then open folder
                this.remoteContainer.openRemoteFolder(data.host, data.username, data.port, data.path);
              }
            }).catch(error => {
              console.error(`Failed to connect ${data.host}: `, error)
            })
            break;
          case 'openRemoteFolder':
            this.remoteContainer.openRemoteFolder(data.host, data.username, data.port, data.path);
            break;
          // ----------------- not frequent -----------------------
          case 'setUserToken':
            this.user.setUserTokenToLocal(data.userToken)
            if (data.userToken === this.user.getUserTokenFromLocal()) {
              panel.webview.postMessage({ command: 'setUserToken', data: {ok: true}})
              break;
            } else {
              panel.webview.postMessage({ command: 'setUserToken', data: {ok: false}})
              break;
            }
          case 'setUsername':
            this.user.setUsernameToLocal(data.username);
            if (data.username === this.user.getUsernameFromLocal()) {
              panel.webview.postMessage({command: 'setUsername', data: {ok: true}});
              break;
            } else {
              panel.webview.postMessage({command: 'setUsername', data: {ok: false}});
              break;
            }
          case 'getUserPublicKey':
            var userPublicKey = '';
            if (this.user.existUserPrivateKey()) {
              userPublicKey = this.user.getUserPublicKey();
              panel.webview.postMessage({command: 'getUserPublicKey', data: {userPublicKey: userPublicKey}})
              break;
            } else {
              panel.webview.postMessage({command: 'getUserPublicKey', data: {userPublicKey: userPublicKey}})
              break;
            }
          case 'createUserPublicKey':
            await this.user.createUserSSHKey();
            if (this.user.existUserPublicKey()) {
              panel.webview.postMessage({command: 'createUserPublicKey', data: {ok: true}})
              break;
            } else {
              panel.webview.postMessage({command: 'createUserPublicKey', data: {ok: false}})
              break;
            }
          case 'getMachineName':
            const machineName = os.hostname();
            panel.webview.postMessage({command: 'getMachineName', data: {machineName: machineName}})
          case 'getDefaultPublicKey':
            var defaultPublicKey;
            if (utils.existDefaultPublicKey()) {
              defaultPublicKey = utils.getDefaultPublicKey();
            } else {
              // if default public key doesn't exist, create it
              utils.createSSHKey();
              defaultPublicKey = utils.getDefaultPublicKey();
            }
            panel.webview.postMessage({ command: 'getDefaultPublicKey', data: {defaultPublicKey: defaultPublicKey}})
        }
      },
      undefined,
      this.context.subscriptions
    );

    this.context.subscriptions.push(panel)
  }


  async getWebviewContent(content: string): Promise<string> {
    return `${content}`
  }
}