import { SpaceEntity } from '@app/common/modules/space/entities/space.entity';
import { HttpException, HttpStatus } from '@nestjs/common';
import { CommandHandler, ICommandHandler } from '@nestjs/cqrs';
import { DeviceService } from 'src/device/services';
import { UserSpaceService } from 'src/users/services';
import { DataSource } from 'typeorm';
import { DisableSpaceCommand } from '../commands';
import { SpaceSceneService, SubSpaceService } from '../services';

@CommandHandler(DisableSpaceCommand)
export class DisableSpaceHandler
  implements ICommandHandler<DisableSpaceCommand>
{
  constructor(
    private readonly subSpaceService: SubSpaceService,
    private readonly userService: UserSpaceService,
    private readonly deviceService: DeviceService,
    private readonly sceneService: SpaceSceneService,
    private readonly dataSource: DataSource,
  ) {}

  async execute(command: DisableSpaceCommand): Promise<void> {
    const queryRunner = this.dataSource.createQueryRunner();

    await queryRunner.connect();
    await queryRunner.startTransaction();

    try {
      const { spaceUuid, orphanSpace } = command.param;

      const space = await queryRunner.manager.findOne(SpaceEntity, {
        where: { uuid: spaceUuid, disabled: false },
        relations: [
          'subspaces',
          'parent',
          'devices',
          'scenes',
          'children',
          'userSpaces',
          'productAllocations',
          'productAllocations.tag',
          'productAllocations.product',
        ],
      });

      if (!space) {
        throw new HttpException(
          `Space with UUID ${spaceUuid} not found`,
          HttpStatus.NOT_FOUND,
        );
      }

      if (space.children && space.children.length > 0) {
        for (const child of space.children) {
          await this.execute(
            new DisableSpaceCommand({ spaceUuid: child.uuid, orphanSpace }),
          );
        }
      }

      const tagUuids =
        space.productAllocations?.map(({ tag }) => tag.uuid) || [];
      /*   const subspaceDtos =
        space.subspaces?.map((subspace) => ({
          subspaceUuid: subspace.uuid,
        })) || []; */
      const deletionTasks = [
        this.userService.deleteUserSpace(space.uuid),

        this.deviceService.deleteDevice(
          space.devices,
          orphanSpace,
          queryRunner,
        ),
        this.sceneService.deleteScenes(space, queryRunner),
      ];

      await Promise.all(deletionTasks);

      // Mark space as disabled
      space.disabled = true;
      await queryRunner.manager.save(space);

      await queryRunner.commitTransaction();
    } catch (error) {
      await queryRunner.rollbackTransaction();
      console.error(`Failed to disable space: ${error.message}`);
    } finally {
      await queryRunner.release();
    }
  }
}