import {
  forwardRef,
  HttpException,
  HttpStatus,
  Inject,
  Injectable,
} from '@nestjs/common';
import { InjectRepository } from '@nestjs/typeorm';
import { Connection, EntityNotFoundError, Not, Repository } from 'typeorm';
import { Supplier } from '../entities/supplier.entity';
import { InputCoaDto } from '../../transaction/dto/input-coa.dto';
import { balanceType, coaType } from '../../helper/enum-list';
import { CreateSupplierDto } from '../dto/create-supplier.dto';
import { CoaService } from '../../transaction/coa.service';
import * as uuid from 'uuid';
import { UpdateSupplierDto } from '../dto/update-supplier.dto';
import { COA } from '../../transaction/entities/coa.entity';

@Injectable()
export class SupplierService {
  constructor(
    @InjectRepository(Supplier)
    private supplierRepository: Repository<Supplier>,
    @Inject(
      forwardRef(() => {
        return CoaService;
      }),
    )
    private coaService: CoaService,
    private connection: Connection,
  ) {}

  async create(createSupplierDto: CreateSupplierDto) {
    const check = await this.supplierRepository.findOne({
      code: createSupplierDto.code,
    });

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

    const supplierData = new Supplier();
    supplierData.id = uuid.v4();
    supplierData.name = createSupplierDto.name;
    supplierData.code = createSupplierDto.code;
    supplierData.status = false;

    await this.connection.transaction(async (manager) => {
      const result = await manager.insert(Supplier, supplierData);

      const dataCoaInventory = new InputCoaDto();
      dataCoaInventory.supplier = supplierData;
      dataCoaInventory.balanceType = balanceType.DEBIT;
      dataCoaInventory.type = coaType.INVENTORY;
      dataCoaInventory.coaEntityManager = manager;
      await this.coaService.create(dataCoaInventory);

      const dataCoaCostOfSales = new InputCoaDto();
      dataCoaCostOfSales.supplier = supplierData;
      dataCoaCostOfSales.balanceType = balanceType.DEBIT;
      dataCoaCostOfSales.type = coaType.COST_OF_SALES;
      dataCoaCostOfSales.coaEntityManager = manager;
      await this.coaService.create(dataCoaCostOfSales);

      const dataCoaBudget = new InputCoaDto();
      dataCoaBudget.supplier = supplierData;
      dataCoaBudget.balanceType = balanceType.DEBIT;
      dataCoaBudget.type = coaType.BUDGET;
      dataCoaBudget.coaEntityManager = manager;
      await this.coaService.create(dataCoaBudget);

      const dataCoaContraBudget = new InputCoaDto();
      dataCoaContraBudget.supplier = supplierData;
      dataCoaContraBudget.balanceType = balanceType.CREDIT;
      dataCoaContraBudget.type = coaType.CONTRA_BUDGET;
      dataCoaContraBudget.coaEntityManager = manager;
      await this.coaService.create(dataCoaContraBudget);
    });

    return supplierData;
  }

  async update(id: string, updateSupplierDto: UpdateSupplierDto) {
    const check = await this.supplierRepository.findOne({
      code: updateSupplierDto.code,
      id: Not(id),
    });

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

    const supplierData = new Supplier();

    supplierData.name = updateSupplierDto.name;
    supplierData.status = true;

    await this.connection.transaction(async (manager) => {
      await manager.update(Supplier, { id: id }, supplierData);
    });

    return supplierData;
  }

  setStatus = async (id: string, type: string) => {
    const supplierData = new Supplier();

    if (type === 'active') {
      supplierData.status = true;
    } else {
      supplierData.status = false;
    }

    await this.connection.transaction(async (manager) => {
      await manager.update(Supplier, { id: id }, supplierData);
    });

    return supplierData;
  };

  async findAllSupplier(page) {
    const baseQuery = this.supplierRepository
      .createQueryBuilder('supplier')
      .leftJoinAndMapOne(
        'supplier.coa',
        COA,
        'coa',
        `coa.supplier = supplier.id and coa.type = '2'`,
      )
      .leftJoinAndMapOne(
        'supplier.coa_undistribute',
        COA,
        'coa_undistribute',
        `coa_undistribute.supplier = supplier.id and coa_undistribute.type = '9'`,
      )
      .select(['supplier', 'coa.amount', 'coa_undistribute.amount']);

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

    const totalData = await baseQuery.getCount();

    return {
      data,
      count: totalData,
    };
  }

  async findByCode(code: string) {
    try {
      return await this.supplierRepository.findOneOrFail({
        code: code,
      });
    } catch (e) {
      if (e instanceof EntityNotFoundError) {
        throw new HttpException(
          {
            statusCode: HttpStatus.NOT_FOUND,
            error: 'Supplier not found',
          },
          HttpStatus.NOT_FOUND,
        );
      } else {
        throw e;
      }
    }
  }

  async findByActive() {
    try {
      return await this.supplierRepository.findOneOrFail({
        status: true,
      });
    } catch (e) {
      if (e instanceof EntityNotFoundError) {
        throw new HttpException(
          {
            statusCode: HttpStatus.NOT_FOUND,
            error: 'Supplier Data not found',
          },
          HttpStatus.NOT_FOUND,
        );
      } else {
        throw e;
      }
    }
  }

  async findByActiveAll() {
    try {
      return await this.supplierRepository.find({
        status: true,
      });
    } catch (e) {
      if (e instanceof EntityNotFoundError) {
        throw new HttpException(
          {
            statusCode: HttpStatus.NOT_FOUND,
            error: 'Supplier Data not found',
          },
          HttpStatus.NOT_FOUND,
        );
      } else {
        throw e;
      }
    }
  }
}