import {
  forwardRef,
  HttpException,
  HttpStatus,
  Inject,
  Injectable,
} from '@nestjs/common';
import { EntityNotFoundError, Repository } from 'typeorm';
import { InjectRepository } from '@nestjs/typeorm';
import { COA } from './entities/coa.entity';
import { balanceType, coaType } from '../helper/enum-list';
import { InputCoaDto } from './dto/input-coa.dto';
import { UsersService } from 'src/users/users.service';

export class CoaService {
  constructor(
    @InjectRepository(COA)
    private coaRepository: Repository<COA>,
    @Inject(
      forwardRef(() => {
        return UsersService;
      }),
    )
    private userService: UsersService,
  ) {}

  async create(inputCoaDto: InputCoaDto) {
    const coaData = new COA();
    let name = '';
    if (inputCoaDto.user) {
      coaData.user = inputCoaDto.user.id;
      name = inputCoaDto.user.username;
    }

    if (inputCoaDto.supplier) {
      coaData.supplier = inputCoaDto.supplier.id;
      name = inputCoaDto.supplier.code;
    }

    coaData.name = `${coaType[inputCoaDto.type]}-${name}`;
    coaData.balanceType = inputCoaDto.balanceType;
    coaData.type = inputCoaDto.type;
    coaData.amount = 0;

    const result = await inputCoaDto.coaEntityManager.insert(COA, coaData);

    if (
      inputCoaDto.type == coaType.ACCOUNT_RECEIVABLE ||
      inputCoaDto.type == coaType.ACCOUNT_PAYABLE
    ) {
      coaData.relatedUser = inputCoaDto.relatedUserId;
      await inputCoaDto.coaEntityManager.save(coaData);
    }

    return coaData;
  }

  async findByUser(id: string, typeOfCoa: coaType) {
    try {
      return await this.coaRepository.findOneOrFail({
        user: id,
        type: typeOfCoa,
      });
    } catch (e) {
      if (e instanceof EntityNotFoundError) {
        throw new HttpException(
          {
            statusCode: HttpStatus.NOT_FOUND,
            error: 'COA not found',
          },
          HttpStatus.NOT_FOUND,
        );
      } else {
        throw e;
      }
    }
  }

  async findByUserWithRelated(
    id: string,
    relatedId: string,
    typeOfCoa: coaType,
  ) {
    try {
      return await this.coaRepository.findOneOrFail({
        user: id,
        type: typeOfCoa,
        relatedUser: relatedId,
      });
    } catch (e) {
      if (e instanceof EntityNotFoundError) {
        throw new HttpException(
          {
            statusCode: HttpStatus.NOT_FOUND,
            error: 'Coa Data not found',
          },
          HttpStatus.NOT_FOUND,
        );
      } else {
        throw e;
      }
    }
  }

  async findByName(name: string) {
    try {
      return await this.coaRepository.findOneOrFail({ name: name });
    } catch (e) {
      if (e instanceof EntityNotFoundError) {
        throw new HttpException(
          {
            statusCode: HttpStatus.NOT_FOUND,
            error: 'COA Data not found',
          },
          HttpStatus.NOT_FOUND,
        );
      } else {
        throw e;
      }
    }
  }
}