/*****************************************************************************\
|  █████  █████ ██    █ █████ █████   ████  ██      ████   █████ █████  ███ ® |
| ██      █     ███   █ █     ██  ██ ██  ██ ██      ██  █ ██   ██  █   █      |
| ██  ███ ████  █ ██  █ ████  █████  ██████ ██      ████   █   █   █    ██    |
| ██   ██ █     █  ██ █ █     ██  ██ ██  ██ ██      ██  █ ██   ██  █      █   |
|  █████  █████ █   ███ █████ ██  ██ ██  ██ █████   ████   █████   █   ███    |
|                                                                             |
| General Bots Copyright (c) pragmatismo.cloud. 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.cloud.              |
| 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';

import { GBLog, GBMinInstance, GBService } from 'botlib';
import { GBServer } from '../../../src/app.js';
import { CollectionUtil } from 'pragmatismo-io-framework';
import { GBVMService } from '../../basic.gblib/services/GBVMService.js';
import { GuaribasSchedule } from '../../core.gbapp/models/GBModel.js';

import cron from 'node-cron';
import { GBLogEx } from '../../core.gbapp/services/GBLogEx.js';

/**
 * @fileoverview Schedule Services.
 */

/**
 * Basic services for BASIC manipulation.
 */
export class ScheduleServices extends GBService {
  public async deleteScheduleIfAny(min: GBMinInstance, name: string) {
    let i = 1;
    while (i <= 10) {
      const task = min['scheduleMap'] ? min['scheduleMap'][name + i] : null;

      if (task) {
        task.destroy();
      }
      const id = `${name};${i}`;

      delete min['scheduleMap'][id];
      const count = await GuaribasSchedule.destroy({
        where: {
          instanceId: min.instance.instanceId,
          name: id
        }
      });

      if (count > 0) {
        GBLogEx.info(min, `Removed ${name} SET SCHEDULE and ${count} rows from storage on: ${min.botId}...`);
      }

      i++;
    }
  }

  /**
   * Finds and update user agent information to a next available person.
   */
  public async createOrUpdateSchedule(min: GBMinInstance, schedule: string, name: string): Promise<GuaribasSchedule> {
    let record = await GuaribasSchedule.findOne({
      where: {
        instanceId: min.instance.instanceId,
        name: name
      }
    });

    if (record === null) {
      record = await GuaribasSchedule.create(<GuaribasSchedule>{
        instanceId: min.instance.instanceId,
        name: name,
        schedule: schedule
      });
    } else {
      record.schedule = schedule;
      await record.save();
    }

    this.ScheduleItem(record, min);

    return record;
  }

  /**
   * Load all cached schedule from BASIC SET SCHEDULE keyword.
   */
  public async scheduleAll() {
    let schedules;
    try {
      schedules = await GuaribasSchedule.findAll();
      let i = 0;
      let lastName = '';

      await CollectionUtil.asyncForEach(schedules, async item => {
        if (item.name === lastName) {
          item.name = item.name + ++i;
        } else {
          i = 0;
        }

        let min: GBMinInstance = GBServer.globals.minInstances.filter(
          p => p.instance.instanceId === item.instanceId
        )[0];

        if (min) {
          this.ScheduleItem(item, min);
        }
      });
    } catch (error) {
      throw new Error(`Cannot schedule: ${error.message}.`);
    }
    return schedules;
  }

  private ScheduleItem(item: GuaribasSchedule, min: GBMinInstance) {
    GBLogEx.info(min, `Scheduling ${item.name} on ${min.botId}...`);
    try {
      const options = {
        scheduled: true,
        timezone: 'America/Sao_Paulo'
      };

      const task = min['scheduleMap'][item.name];
      if (task) {
        task.stop();
        min['scheduleMap'][item.name] = null;
      }

      min['scheduleMap'][item.name] = cron.schedule(
        item.schedule,
        function () {
          const finalData = async () => {
            let script = item.name.split(';')[0];
            let min: GBMinInstance = GBServer.globals.minInstances.filter(
              p => p.instance.instanceId === item.instanceId
            )[0];
            GBLogEx.info(min, `Running .gbdialog word ${item.name} on:${item.schedule}...`);

            const pid = GBVMService.createProcessInfo(null, min, 'batch', null);
            await GBVMService.callVM(script, min, null, pid);
          };
          (async () => {
            await finalData();
          })();
        },
        options
      );
    } catch (error) {
      GBLogEx.error(min, `Running .gbdialog word ${item.name} : ${error}...`);
    }
  }
}