/*****************************************************************************\
|                                               ( )_  _                       |
|    _ _    _ __   _ _    __    ___ ___     _ _ | ,_)(_)  ___   ___     _     |
|   ( '_`\ ( '__)/'_` ) /'_ `\/' _ ` _ `\ /'_` )| |  | |/',__)/' _ `\ /'_`\   |
|   | (_) )| |  ( (_| |( (_) || ( ) ( ) |( (_| || |_ | |\__, \| ( ) |( (_) )  |
|   | ,__/'(_)  `\__,_)`\__  |(_) (_) (_)`\__,_)`\__)(_)(____/(_) (_)`\___/'  |
|   | |                ( )_) |                                                |
|   (_)                 \___/'                                                |
|                                                                             |
| General Bots Copyright (c) Pragmatismo.io. All rights reserved.             |
| Licensed under the AGPL-3.0.                                                |
|                                                                             |
| According to our dual licensing model, this program can be used either      |
| under the terms of the GNU Affero General Public License, version 3,        |
| or under a proprietary license.                                             |
|                                                                             |
| The texts of the GNU Affero General Public License with an additional       |
| permission and of our proprietary license can be found at and               |
| in the LICENSE file you have received along with this program.              |
|                                                                             |
| This program is distributed in the hope that it will be useful,             |
| but WITHOUT ANY WARRANTY, without even the implied warranty of              |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                |
| GNU Affero General Public License for more details.                         |
|                                                                             |
| "General Bots" is a registered trademark of Pragmatismo.io.                 |
| The licensing of the program under the AGPLv3 does not imply a              |
| trademark license. Therefore any rights, title and interest in              |
| our trademarks remain entirely with us.                                     |
|                                                                             |
\*****************************************************************************/

/**
 * @fileoverview General Bots server core.
 */

'use strict';

const logger = require('../../../src/logger');
const Path = require('path');
const UrlJoin = require('url-join');
const Fs = require('fs');
const WaitUntil = require('wait-until');
const express = require('express');
const child_process = require('child_process');
const graph = require('@microsoft/microsoft-graph-client');

import { GBMinInstance, IGBCoreService, IGBInstance } from 'botlib';
import { GBError, IGBPackage } from 'botlib';
import { AzureSearch } from 'pragmatismo-io-framework';
import { AzureDeployerService } from '../../azuredeployer.gbapp/services/AzureDeployerService';
import { GuaribasInstance, GuaribasPackage } from '../models/GBModel';
import { GBAdminService } from './../../admin.gbapp/services/GBAdminService';
import { KBService } from './../../kb.gbapp/services/KBService';
import { GBConfigService } from './GBConfigService';
import { GBCoreService } from './GBCoreService';
import { GBImporter } from './GBImporterService';
import { GBVMService } from './GBVMService';

/**
 *
 * Deployer service for bots, themes, ai and more.
 */

export class GBDeployer {
  public static deployFolder = 'packages';
  public core: IGBCoreService;
  public importer: GBImporter;
  public workDir: string = './work';

  constructor(core: IGBCoreService, importer: GBImporter) {
    this.core = core;
    this.importer = importer;
  }

  public static getConnectionStringFromInstance(instance: GuaribasInstance) {
    return `Server=tcp:${instance.storageServer}.database.windows.net,1433;Database=${instance.storageName};User ID=${
      instance.storageUsername
    };Password=${instance.storagePassword};Trusted_Connection=False;Encrypt=True;Connection Timeout=30;`;
  }

  /**
   *
   * Performs package deployment in all .gbai or default.
   *
   */
  public async deployPackages(core: IGBCoreService, server: any, appPackages: IGBPackage[]) {
    const _this = this;

    return new Promise(
      (resolve: any, reject: any): any => {
        let totalPackages = 0;
        const additionalPath = GBConfigService.get('ADDITIONAL_DEPLOY_PATH');
        let paths = [GBDeployer.deployFolder];
        if (additionalPath) {
          paths = paths.concat(additionalPath.toLowerCase().split(';'));
        }
        const botPackages = new Array<string>();
        const gbappPackages = new Array<string>();
        let generalPackages = new Array<string>();

        function doIt(path) {
          const isDirectory = source => Fs.lstatSync(source).isDirectory();
          const getDirectories = source =>
            Fs.readdirSync(source)
              .map(name => Path.join(source, name))
              .filter(isDirectory);

          const dirs = getDirectories(path);
          dirs.forEach(element => {
            if (element.startsWith('.')) {
              logger.info(`Ignoring ${element}...`);
            } else {
              if (element.endsWith('.gbot')) {
                botPackages.push(element);
              } else if (element.endsWith('.gbapp')) {
                gbappPackages.push(element);
              } else {
                generalPackages.push(element);
              }
            }
          });
        }

        logger.info(`Starting looking for packages (.gbot, .gbtheme, .gbkb, .gbapp)...`);
        paths.forEach(e => {
          logger.info(`Looking in: ${e}...`);
          doIt(e);
        });

        // Deploys all .gbapp files first.

        const appPackagesProcessed = this.deployAppPackages(gbappPackages, core, appPackages);

        WaitUntil()
          .interval(1000)
          .times(10)
          .condition(cb => {
            logger.info(`Waiting for app package deployment...`);
            cb(appPackagesProcessed === gbappPackages.length);
          })
          .done(async result => {
            logger.info(`App Package deployment done.`);

            ({ generalPackages, totalPackages } = await this.deployDataPackages(
              core,
              botPackages,
              _this,
              generalPackages,
              server,
              reject,
              totalPackages,
              resolve
            ));
          });
      }
    );
  }

  /**
   * Deploys a bot to the storage.
   */

  public async deployBot(localPath: string): Promise<IGBInstance> {
    const packageType = Path.extname(localPath);
    const packageName = Path.basename(localPath);
    const instance = await this.importer.importIfNotExistsBotPackage(null, packageName, localPath);

    return instance;
  }

  public async deployPackageToStorage(instanceId: number, packageName: string): Promise<GuaribasPackage> {
    return GuaribasPackage.create({
      packageName: packageName,
      instanceId: instanceId
    });
  }

  public async deployFromSharePoint(instanceId: number, path: string) {
    const adminService = new GBAdminService(this.core);
    const accessToken = adminService.acquireElevatedToken(instanceId);

    // Initialize Graph client.

    const client = graph.Client.init({
      authProvider: done => {
        done(null, accessToken);
      }
    });

    const events = await client
      .api('/me/events')
      .select('subject,organizer,start,end')
      .orderby('createdDateTime DESC')
      .get();
  }

  public deployScriptToStorage(instanceId: number, localPath: string) {}

  public deployTheme(localPath: string) {
    // DISABLED: Until completed, "/ui/public".
    // FsExtra.copy(localPath, this.workDir + packageName)
    //   .then(() => {
    //   })
    //   .catch(err => {
    //     var gberr = GBError.create(
    //       `GuaribasBusinessError: Error copying package: ${localPath}.`
    //     )
    //   })
  }

  public async deployPackageFromSharePoint(min: GBMinInstance, path: string) {}

  public async deployPackageFromLocalPath(min: GBMinInstance, localPath: string) {
    const packageType = Path.extname(localPath);

    switch (packageType) {
      case '.gbot':
        return this.deployBot(localPath);

      case '.gbtheme':
        return this.deployTheme(localPath);

      // PACKAGE: Put in package logic.
      case '.gbkb':
        const service = new KBService(this.core.sequelize);
        return service.deployKb(this.core, this, localPath);

      case '.gbui':
        break;

      case '.gbdialog':
        const vm = new GBVMService();
        return vm.loadDialogPackage(localPath, min, this.core, this);

      default:
        const err = GBError.create(`GuaribasBusinessError: Unknown package type: ${packageType}.`);
        Promise.reject(err);
        break;
    }
  }

  public async undeployPackageFromLocalPath(instance: IGBInstance, localPath: string) {
    const packageType = Path.extname(localPath);
    const packageName = Path.basename(localPath);

    const p = await this.getPackageByName(instance.instanceId, packageName);

    switch (packageType) {
      case '.gbot':
        // TODO: this.undeployBot(packageName, localPath)
        break;

      case '.gbtheme':
        // TODO: this.undeployTheme(packageName, localPath)
        break;

      case '.gbkb':
        const service = new KBService(this.core.sequelize);
        return service.undeployKbFromStorage(instance, this, p.packageId);

      case '.gbui':
        break;

      case '.gbdialog':
        break;

      default:
        const err = GBError.create(`GuaribasBusinessError: Unknown package type: ${packageType}.`);
        Promise.reject(err);
        break;
    }
  }

  public async rebuildIndex(instance: GuaribasInstance) {
    const search = new AzureSearch(
      instance.searchKey,
      instance.searchHost,
      instance.searchIndex,
      instance.searchIndexer
    );

    const connectionString = GBDeployer.getConnectionStringFromInstance(instance);

    const dsName = 'gb';
    try {
      await search.deleteDataSource(dsName);
    } catch (err) {
      if (err.code != 404) {
        // First time, nothing to delete.
        throw err;
      }
    }

    await search.createDataSource(dsName, dsName, 'GuaribasQuestion', 'azuresql', connectionString);

    try {
      await search.deleteIndex();
    } catch (err) {
      if (err.code != 404) {
        // First time, nothing to delete.
        throw err;
      }
    }
    await search.createIndex(AzureDeployerService.getKBSearchSchema(instance.searchIndex), dsName);
  }

  public async getPackageByName(instanceId: number, packageName: string): Promise<GuaribasPackage> {
    const where = { packageName: packageName, instanceId: instanceId };
    return GuaribasPackage.findOne({
      where: where
    });
  }

  public installDefaultGBUI() {
    const root = 'packages/default.gbui';
    if (!Fs.existsSync(`${root}/build`)) {
      logger.info(`Preparing default.gbui (it may take some additional time for the first time)...`);
      Fs.writeFileSync(`${root}/.env`, 'SKIP_PREFLIGHT_CHECK=true');
      child_process.execSync('npm install', { cwd: root });
      child_process.execSync('npm run build', { cwd: root });
    }
  }

  private async deployDataPackages(
    core: GBCoreService,
    botPackages: string[],
    _this: this,
    generalPackages: string[],
    server: any,
    reject: any,
    totalPackages: number,
    resolve: any
  ) {
    try {
      await core.syncDatabaseStructure();
    } catch (e) {
      throw e;
    }

    // Deploys all .gbot files first.

    botPackages.forEach(e => {
      if (e !== 'packages\\boot.gbot') {
        logger.info(`Deploying bot: ${e}...`);
        _this.deployBot(e);
        logger.info(`Bot: ${e} deployed...`);
      }
    });

    // Then all remaining generalPackages are loaded.

    generalPackages = generalPackages.filter(p => !p.endsWith('.git'));
    generalPackages.forEach(filename => {
      const filenameOnly = Path.basename(filename);
      logger.info(`Deploying package: ${filename}...`);

      // Handles apps for general bots - .gbapp must stay out of deploy folder.

      if (Path.extname(filename) === '.gbapp' || Path.extname(filename) === '.gblib') {
        // Themes for bots.
      } else if (Path.extname(filename) === '.gbtheme') {
        server.use('/themes/' + filenameOnly, express.static(filename));
        logger.info(`Theme (.gbtheme) assets accessible at: ${'/themes/' + filenameOnly}.`);
      } else if (Path.extname(filename) === '.gbkb') {
        server.use('/kb/' + filenameOnly + '/subjects', express.static(UrlJoin(filename, 'subjects')));
        logger.info(`KB (.gbkb) assets accessible at: ${'/kb/' + filenameOnly}.`);
      } else if (Path.extname(filename) === '.gbui') {
        // Already Handled
      } else if (Path.extname(filename) === '.gbdialog') {
        // Already Handled
      } else {
        // Unknown package format.
        const err = new Error(`Package type not handled: ${filename}.`);
        reject(err);
      }
      totalPackages++;
    });

    WaitUntil()
      .interval(100)
      .times(5)
      .condition(cb => {
        logger.info(`Waiting for package deployment...`);
        cb(totalPackages === generalPackages.length);
      })
      .done(result => {
        if (botPackages.length === 0) {
          logger.info('Use ADDITIONAL_DEPLOY_PATH to point to a .gbai package folder (no external packages).');
        } else {
          logger.info(`Package deployment done.`);
        }
        resolve();
      });

    return { generalPackages, totalPackages };
  }

  private deployAppPackages(gbappPackages: string[], core: any, appPackages: any[]) {
    let appPackagesProcessed = 0;
    gbappPackages.forEach(e => {
      // Skips .gbapp inside deploy folder.
      if (!e.startsWith('packages')) {
        logger.info(`Deploying app: ${e}...`);

        let folder = Path.join(e, 'node_modules');
        if (!Fs.existsSync(folder)) {
          logger.info(`Installing modules for ${e}...`);
          child_process.execSync('npm install', { cwd: e });
        }

        folder = Path.join(e, 'dist');
        if (!Fs.existsSync()) {
          logger.info(`Compiling ${e}...`);

          try {
            child_process.execSync(Path.join(e, 'node_modules/.bin/tsc'), { cwd: e });
            import(e)
              .then(m => {
                const p = new m.Package();
                p.loadPackage(core, core.sequelize);
                appPackages.push(p);
                logger.info(`App (.gbapp) deployed: ${e}.`);
                appPackagesProcessed++;
              })
              .catch(err => {
                logger.error(`Error deploying .gbapp package: ${e}\n${err}`);
                appPackagesProcessed++;
              });
          } catch (error) {
            logger.error(`Error compiling .gbapp package ${e}:\n${error.stdout.toString()}`);
            appPackagesProcessed++;
          }
        }
      } else {
        appPackagesProcessed++;
      }
    });
    return appPackagesProcessed;
  }
}