import { EventsHandler, IEventHandler } from '@nestjs/cqrs';
import { DataSchedulingChangeStatusEvent } from '../../entities/event/data-scheduling-change-status.event';
import { capitalizeEachWord } from 'src/modules/reports/shared/helpers';
import {
  DataSchedulingLogEntity,
  SCHEDULING_LOG_ACTION_ENUM,
  SCHEDULING_LOG_TYPE_ENUM,
} from '../../entities/data-scheduling.entity';
import { Logger } from '@nestjs/common';
import { DataSchedulingLogDataService } from '../../../data/services/data-scheduling-log-data.service';
import { decryptionTotal } from '../../../infrastructure/helpers';

@EventsHandler(DataSchedulingChangeStatusEvent)
export class DataSchedulingChangeStatusHandler
  implements IEventHandler<DataSchedulingChangeStatusEvent>
{
  private readonly logger = new Logger(DataSchedulingChangeStatusHandler.name);

  constructor(private service: DataSchedulingLogDataService) {}

  async handle(event: DataSchedulingChangeStatusEvent) {
    // Prevent execution if the event data is null, which can happen if triggered from the default percentage update service.
    if (event.data?.data) {
      const oldData = event?.data?.old;
      const newData = event?.data?.data;

      const oldStatus = capitalizeEachWord(oldData?.status);
      const newStatus = capitalizeEachWord(newData?.status);

      const scheduleName = newData?.name || 'an item';
      const editorName = newData.editor_name || 'System';
      const totalPercentage = decryptionTotal(newData?.indexing_key);

      const description = `<div><b>${editorName}</b> changed the status of <b><i>${scheduleName} (${totalPercentage}%)</i></b> schedule from <b><i>${newData?.schedule_date_from}</i></b> to <b><i>${newData.schedule_date_to}</i></b> from <b><i>${oldStatus}</i></b> to <b><i>${newStatus}</i></b>.</div>`;

      const payload: DataSchedulingLogEntity = {
        type: SCHEDULING_LOG_TYPE_ENUM.DATA_SCHEDULING,
        action: SCHEDULING_LOG_ACTION_ENUM.CHANGE_STATUS,
        log_created_at: new Date().getTime(),

        data_id: newData?.id,
        name: newData?.name,
        indexing_key: newData?.indexing_key,
        schedule_date_from: newData?.schedule_date_from,
        schedule_date_to: newData?.schedule_date_to,

        status: newData?.status,
        creator_id: newData?.creator_id,
        creator_name: newData?.creator_name,
        editor_id: newData?.editor_id,
        editor_name: newData?.editor_name,
        created_at: newData?.created_at,
        updated_at: newData?.updated_at,
        description: description,
      };

      await this.service.create(payload as any);
      this.logger.verbose(
        `[SCHEDULING LOG] Change status data for ID: ${payload.data_id}`,
      );
    }
  }
}