import { SpaceEntity } from '@app/common/modules/space/entities';
import { SpaceRepository } from '@app/common/modules/space/repositories';
import { HttpException, HttpStatus, Injectable } from '@nestjs/common';
import { CommunityService } from '../../community/services';
import { ProjectService } from '../../project/services';
import {
  SpaceModelEntity,
  SpaceModelRepository,
} from '@app/common/modules/space-model';
import { ProjectRepository } from '@app/common/modules/project/repositiories';
import { CommunityRepository } from '@app/common/modules/community/repositories';
import { DeviceRepository } from '@app/common/modules/device/repositories';

@Injectable()
export class ValidationService {
  constructor(
    private readonly projectService: ProjectService,
    private readonly communityService: CommunityService,
    private readonly spaceRepository: SpaceRepository,
    private readonly projectRepository: ProjectRepository,
    private readonly communityRepository: CommunityRepository,
    private readonly spaceModelRepository: SpaceModelRepository,
    private readonly deviceRepository: DeviceRepository,
  ) {}

  async validateCommunityAndProject(
    communityUuid: string,
    projectUuid: string,
  ) {
    const project = await this.projectService.findOne(projectUuid);
    const community = await this.communityService.getCommunityById({
      communityUuid,
      projectUuid,
    });

    return { community: community.data, project: project };
  }

  async checkCommunityAndProjectSpaceExistence(
    communityUuid: string,
    projectUuid: string,
    spaceUuid?: string,
  ): Promise<void> {
    const [projectExists, communityExists, spaceExists] = await Promise.all([
      this.projectRepository.exists({ where: { uuid: projectUuid } }),
      this.communityRepository.exists({
        where: { uuid: communityUuid, project: { uuid: projectUuid } },
      }),
      spaceUuid
        ? this.spaceRepository.exists({
            where: { uuid: spaceUuid },
          })
        : Promise.resolve(true),
    ]);

    if (!projectExists)
      throw new HttpException(`Project not found`, HttpStatus.NOT_FOUND);
    if (!communityExists)
      throw new HttpException(`Community not found`, HttpStatus.NOT_FOUND);
    if (spaceUuid && !spaceExists)
      throw new HttpException(`Space not found`, HttpStatus.NOT_FOUND);
  }

  async validateSpaceWithinCommunityAndProject(
    communityUuid: string,
    projectUuid: string,
    spaceUuid?: string,
  ): Promise<SpaceEntity> {
    await this.validateCommunityAndProject(communityUuid, projectUuid);

    const space = await this.validateSpace(spaceUuid);

    return space;
  }

  async validateSpace(spaceUuid: string): Promise<SpaceEntity> {
    const space = await this.spaceRepository.findOne({
      where: { uuid: spaceUuid, disabled: false },
      relations: [
        'parent',
        'children',
        'subspaces',
        'tags',
        'subspaces.tags',
        'subspaces.devices',
      ],
    });

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

    const devices = await this.deviceRepository.find({
      where: { spaceDevice: { uuid: spaceUuid } },
      select: ['uuid', 'deviceTuyaUuid', 'isActive', 'createdAt', 'updatedAt'],
      relations: ['productDevice', 'tag', 'subspace'],
    });

    space.devices = devices;

    return space;
  }

  async validateSpaceModel(spaceModelUuid: string): Promise<SpaceModelEntity> {
    const spaceModel = await this.spaceModelRepository.findOne({
      where: { uuid: spaceModelUuid },
      relations: [
        'subspaceModels',
        'subspaceModels.tags',
        'tags',
        'subspaceModels.tags.product',
        'tags.product',
      ],
    });

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

    return spaceModel;
  }
}