import {
  SpaceModelEntity,
  SubspaceModelEntity,
  SubspaceProductModelEntity,
  SubspaceProductModelRepository,
} from '@app/common/modules/space-model';
import { QueryRunner } from 'typeorm';
import { HttpException, HttpStatus, Injectable } from '@nestjs/common';

import { SubspaceProductItemModelService } from './subspace-product-item-model.service';
import {
  CreateProductModelDto,
  ProductModelModificationDto,
  UpdateProductModelDto,
} from '../../dtos';
import { BaseProductModelService } from '../../common';
import { ProductService } from 'src/product/services';
import {
  IModifiedProductModelsInterface,
  ProductModelInterface,
} from '../../interfaces';

@Injectable()
export class SubspaceProductModelService extends BaseProductModelService {
  constructor(
    private readonly subpaceProductModelRepository: SubspaceProductModelRepository,
    productService: ProductService,
    private readonly subspaceProductItemModelService: SubspaceProductItemModelService,
  ) {
    super(productService);
  }

  async createSubspaceProductModels(
    spaceProductModelDtos: CreateProductModelDto[],
    spaceModel: SpaceModelEntity,
    subspaceModel: SubspaceModelEntity,
    queryRunner: QueryRunner,
  ): Promise<ProductModelInterface[]> {
    try {
      if (!spaceProductModelDtos?.length) return;

      const productModels = await Promise.all(
        spaceProductModelDtos.map(async (dto) => {
          this.validateProductCount(dto);
          const product = await this.getProduct(dto.productUuid);
          return queryRunner.manager.create(
            this.subpaceProductModelRepository.target,
            {
              product,
              productCount: dto.productCount,
              subspaceModel,
            },
          );
        }),
      );

      const savedProductModels = await queryRunner.manager.save(productModels);

      const newProductModels = await Promise.all(
        spaceProductModelDtos.map(async (dto, index) => {
          const savedModel = savedProductModels[index];
          const productItemModels =
            await this.subspaceProductItemModelService.createProductItemModel(
              dto.items,
              savedModel,
              spaceModel,
              queryRunner,
            );
          return {
            productModel: savedModel,
            productItemModels,
          } as ProductModelInterface;
        }),
      );
      return newProductModels;
    } catch (error) {
      if (error instanceof HttpException) {
        throw error;
      }
      throw new HttpException(
        error.message ||
          'An unexpected error occurred while creating product models.',
        HttpStatus.INTERNAL_SERVER_ERROR,
      );
    }
  }

  async updateSubspaceProductModels(dtos: UpdateProductModelDto[]) {
    try {
      for (const dto of dtos) {
        await this.findOne(dto.productModelUuid);
        const newCount = dto.productCount;
        if (
          dto.items.add.length +
            dto.items.delete.length +
            dto.items.delete.length !==
          newCount
        ) {
          throw new HttpException(
            `Invalid list of items`,
            HttpStatus.BAD_REQUEST,
          );
        }
      }
    } catch (error) {}
  }

  async modifySubspaceProductModels(
    dto: ProductModelModificationDto,
    spaceModel: SpaceModelEntity,
    subspaceModel: SubspaceModelEntity,
    queryRunner: QueryRunner,
  ) {
    const productItemModels: IModifiedProductModelsInterface = {};
    try {
      productItemModels.add = await this.createSubspaceProductModels(
        dto.add,
        spaceModel,
        subspaceModel,
        queryRunner,
      );
    } catch (error) {
      if (error instanceof HttpException) {
        throw error;
      }
      throw new HttpException(
        'Failed to modify Subspace product model',
        HttpStatus.INTERNAL_SERVER_ERROR,
      );
    }
  }

  async findOne(uuid: string): Promise<SubspaceProductModelEntity> {
    const productModel = await this.subpaceProductModelRepository.findOne({
      where: {
        uuid,
      },
    });
    if (!productModel)
      throw new HttpException(
        `Subspace Product model with uuid ${uuid} not found`,
        HttpStatus.NOT_FOUND,
      );
    return productModel;
  }
}