import { HttpException, HttpStatus, Injectable } from '@nestjs/common';
import { EntityNotFoundError, Repository } from 'typeorm';
import { ProductSubCategories } from './entities/product-sub-category.entity';
import { InjectRepository } from '@nestjs/typeorm';
import { CreateSubCategoriesProductDto } from './dto/sub-categories/create-sub-categories-product.dto';
import { UpdateSubCategoriesProductDto } from './dto/sub-categories/update-sub-categories-product.dto';
import { ProductCategoriesService } from './product-categories.service';

@Injectable()
export class ProductSubCategoriesService {
  constructor(
    @InjectRepository(ProductSubCategories)
    private productSubCategoriesRepository: Repository<ProductSubCategories>,
    private productCategoriesService: ProductCategoriesService,
  ) {}

  async create(createSubCategoriesProductDto: CreateSubCategoriesProductDto) {
    const check = await this.productSubCategoriesRepository.findOne({
      code: createSubCategoriesProductDto.code,
    });

    if (check) {
      throw new HttpException(
        {
          statusCode: HttpStatus.NOT_ACCEPTABLE,
          error: 'Sub Category Already Exist',
        },
        HttpStatus.NOT_FOUND,
      );
    }

    const categories = await this.productCategoriesService.findOne(
      createSubCategoriesProductDto.categoryId,
    );

    const result = await this.productSubCategoriesRepository.insert({
      name: createSubCategoriesProductDto.name,
      code: createSubCategoriesProductDto.code,
      category: categories,
    });

    return this.productSubCategoriesRepository.findOneOrFail(
      result.identifiers[0].id,
    );
  }

  async findAll(page, category) {
    const baseQuery = this.productSubCategoriesRepository
      .createQueryBuilder('product_sub_categories')
      .leftJoinAndSelect('product_sub_categories.category', 'category');

    if (category != 'null' && category) {
      baseQuery.where({
        category: category,
      });
    }

    const data = await baseQuery
      .skip(page * 10)
      .take(10)
      .getMany();

    const totalData = await baseQuery.getCount();

    return {
      data,
      count: totalData,
    };
  }

  findAllByCategories(page, category) {
    return this.productSubCategoriesRepository.findAndCount({
      skip: page * 10,
      take: 10,
      where: {
        category: category,
      },
      relations: ['category'],
      order: {
        version: 'DESC',
      },
    });
  }

  async findOne(id: string) {
    try {
      return await this.productSubCategoriesRepository.findOneOrFail(id);
    } catch (e) {
      if (e instanceof EntityNotFoundError) {
        throw new HttpException(
          {
            statusCode: HttpStatus.NOT_FOUND,
            error: 'Product Sub Categories not found',
          },
          HttpStatus.NOT_FOUND,
        );
      } else {
        throw e;
      }
    }
  }

  async update(
    id: string,
    updateCategoriesProductDto: UpdateSubCategoriesProductDto,
  ) {
    try {
      await this.productSubCategoriesRepository.findOneOrFail(id);
    } catch (e) {
      if (e instanceof EntityNotFoundError) {
        throw new HttpException(
          {
            statusCode: HttpStatus.NOT_FOUND,
            error: 'Product Sub Categories not found',
          },
          HttpStatus.NOT_FOUND,
        );
      } else {
        throw e;
      }
    }

    const categories = await this.productCategoriesService.findOne(
      updateCategoriesProductDto.categoryId,
    );

    const result = await this.productSubCategoriesRepository.update(id, {
      name: updateCategoriesProductDto.name,
      category: categories,
    });

    return this.productSubCategoriesRepository.findOneOrFail(id);
  }

  async remove(id: string) {
    try {
      await this.productSubCategoriesRepository.findOneOrFail(id);
    } catch (e) {
      if (e instanceof EntityNotFoundError) {
        throw new HttpException(
          {
            statusCode: HttpStatus.NOT_FOUND,
            error: 'Product Sub Categories not found',
          },
          HttpStatus.NOT_FOUND,
        );
      } else {
        throw e;
      }
    }

    await this.productSubCategoriesRepository.delete(id);
  }
}