#! /usr/bin / env node
/*****************************************************************************\
|                                               ( )_  _                       |
|    _ _    _ __   _ _    __    ___ ___     _ _ | ,_)(_)  ___   ___     _     |
|   ( '_`\ ( '__)/'_` ) /'_ `\/' _ ` _ `\ /'_` )| |  | |/',__)/' _ `\ /'_`\   |
|   | (_) )| |  ( (_| |( (_) || ( ) ( ) |( (_| || |_ | |\__, \| ( ) |( (_) )  |
|   | ,__/'(_)  `\__,_)`\__  |(_) (_) (_)`\__,_)`\__)(_)(____/(_) (_)`\___/'  |
|   | |                ( )_) |                                                |
|   (_)                 \___/'                                                |
|                                                                             |
| 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.                                     |
|                                                                             |
\*****************************************************************************/

"use strict";

const logger = require("./logger");
const express = require("express");
const bodyParser = require("body-parser");

import { GBConfigService } from "../packages/core.gbapp/services/GBConfigService";
import { GBConversationalService } from "../packages/core.gbapp/services/GBConversationalService";
import { GBMinService } from "../packages/core.gbapp/services/GBMinService";
import { GBDeployer } from "../packages/core.gbapp/services/GBDeployer";
import { GBWhatsappPackage } from "./../packages/whatsapp.gblib/index";
import { GBCoreService } from "../packages/core.gbapp/services/GBCoreService";
import { GBImporter } from "../packages/core.gbapp/services/GBImporter";
import { GBAnalyticsPackage } from "../packages/analytics.gblib";
import { GBCorePackage } from "../packages/core.gbapp";
import { GBKBPackage } from "../packages/kb.gbapp";
import { GBSecurityPackage } from "../packages/security.gblib";
import { GBAdminPackage } from "../packages/admin.gbapp/index";
import { GBCustomerSatisfactionPackage } from "../packages/customer-satisfaction.gbapp";
import { GBAdminService } from "../packages/admin.gbapp/services/GBAdminService";
import { GuaribasInstance } from "../packages/core.gbapp/models/GBModel";
import { AzureDeployerService } from "../packages/azuredeployer.gbapp/services/AzureDeployerService";
import { IGBPackage, IGBInstance } from "botlib";

let appPackages = new Array<IGBPackage>();

/**
 * General Bots open-core entry point.
 */
export class GBServer {
  /**
   *  Program entry-point.
   */

  static run() {
    // Creates a basic HTTP server that will serve several URL, one for each
    // bot instance. This allows the same server to attend multiple Bot on
    // the Marketplace until GB get serverless.

    let port = process.env.port || process.env.PORT || 4242;
    logger.info(`The Bot Server is in STARTING mode...`);
    let server = express();

    server.use(bodyParser.json()); // to support JSON-encoded bodies
    server.use(
      bodyParser.urlencoded({
        // to support URL-encoded bodies
        extended: true
      })
    );

    let bootInstance: IGBInstance;
    server.listen(port, () => {
      (async () => {
        try {
          logger.info(`Accepting connections on ${port}...`);

          // Reads basic configuration, initialize minimal services.

          GBConfigService.init();
          let core = new GBCoreService();

          // Ensures cloud / on-premises infrastructure is setup.

          logger.info(`Establishing a development local proxy...`);
          let proxyAddress = await core.ensureProxy(port);

          let azureDeployer = new AzureDeployerService();

          try {
            await core.initDatabase();
          } catch (error) {
            logger.info(`Deploying cognitive infrastructure...`);
            try {
              bootInstance = await azureDeployer.deployFarm(proxyAddress);
            } catch (error) {
              logger.warn(
                "In case of error, please cleanup any infrastructure (cloud or on-premises) objects created before running again."
              );
              throw error;
            }
            core.writeEnv(bootInstance);
            logger.info(`File .env written, starting...`);
            GBConfigService.init();

            await core.initDatabase();
          }

          // TODO: Get .gb* templates from GitHub and download do additional deploy folder.

          // Check admin password.

          let conversationalService = new GBConversationalService(core);
          let adminService = new GBAdminService(core);
          let password = GBConfigService.get("ADMIN_PASS");

          if (!GBAdminService.StrongRegex.test(password)) {
            throw new Error(
              "STOP: Please, define a really strong password in ADMIN_PASS environment variable before running the server."
            );
          }

          // NOTE: the semicolon is necessary before this line.
          // Loads all system packages.

          [
            GBAdminPackage,
            GBAnalyticsPackage,
            GBCorePackage,
            GBSecurityPackage,
            GBKBPackage,
            GBCustomerSatisfactionPackage,
            GBWhatsappPackage
          ].forEach(e => {
            logger.info(`Loading sys package: ${e.name}...`);
            let p = Object.create(e.prototype) as IGBPackage;
            p.loadPackage(core, core.sequelize);
          });

          // Loads all bot instances from object storage, if it's formatted.

          logger.info(`Loading instances from storage...`);
          let instances: GuaribasInstance[];
          try {
            instances = await core.loadInstances();
            let instance = instances[0];
            if (process.env.NODE_ENV === "development") {
              logger.info(`Updating bot endpoint to local reverse proxy (ngrok)...`);

              await azureDeployer.updateBotProxy(
                instance.botId,
                instance.botId,
                `${proxyAddress}/api/messages/${instance.botId}`
              );
            }
          } catch (error) {
            if (error.parent.code === "ELOGIN") {
              let group = GBConfigService.get("CLOUD_GROUP");
              let serverName = GBConfigService.get("STORAGE_SERVER").split(
                ".database.windows.net"
              )[0];
              await azureDeployer.openStorageFirewall(group, serverName);
            } else {
              // Check if storage is empty and needs formatting.

              let isInvalidObject =
                error.parent.number == 208 || error.parent.errno == 1; // MSSQL or SQLITE.

              if (isInvalidObject) {
                if (GBConfigService.get("STORAGE_SYNC") != "true") {
                  throw `Operating storage is out of sync or there is a storage connection error. Try setting STORAGE_SYNC to true in .env file. Error: ${
                    error.message
                  }.`;
                } else {
                  logger.info(
                    `Storage is empty. After collecting storage structure from all .gbapps it will get synced.`
                  );
                }
              } else {
                throw `Cannot connect to operating storage: ${error.message}.`;
              }
            }
          }

          // Deploy packages and format object store according to .gbapp storage models.

          logger.info(`Deploying packages...`);
          let deployer = new GBDeployer(core, new GBImporter(core));
          await deployer.deployPackages(core, server, appPackages);

          // If instances is undefined here it's because storage has been formatted.
          // Load all instances from .gbot found on deploy package directory.
          if (!instances) {
            let saveInstance = new GuaribasInstance(bootInstance);
            await saveInstance.save();
            instances = await core.loadInstances();
          }

          // Setup server dynamic (per bot instance) resources and listeners.

          logger.info(`Building instances.`);
          let minService = new GBMinService(
            core,
            conversationalService,
            adminService,
            deployer
          );
          await minService.buildMin(server, appPackages, instances);
          logger.info(`The Bot Server is in RUNNING mode...`);

          return core;
        } catch (err) {
          logger.error(`STOP: ${err} ${err.stack ? err.stack : ""}`);
          process.exit(1);
        }
      })();
    });
  }
}

// First line to run.

GBServer.run();