import {
  forwardRef,
  HttpException,
  HttpStatus,
  Inject,
  Injectable,
} from '@nestjs/common';
import { CreateUserDto } from './dto/create-user.dto';
import { UpdateUserDto } from './dto/update-user.dto';
import {
  Connection,
  EntityNotFoundError,
  Equal,
  Not,
  Repository,
} from 'typeorm';
import { User } from './entities/user.entity';
import { InjectRepository } from '@nestjs/typeorm';
import { randomStringGenerator } from '@nestjs/common/utils/random-string-generator.util';
import { hashPassword } from '../helper/hash_password';
import { CoaService } from 'src/transaction/coa.service';
import { balanceType, coaType } from 'src/helper/enum-list';
import { RoleService } from 'src/configurable/roles.service';
import { InputCoaDto } from 'src/transaction/dto/input-coa.dto';
import * as uuid from 'uuid';

@Injectable()
export class UsersService {
  constructor(
    @InjectRepository(User)
    private usersRepository: Repository<User>,
    @Inject(
      forwardRef(() => {
        return CoaService;
      }),
    )
    private coaService: CoaService,
    private roleService: RoleService,
    private connection: Connection,
  ) {}

  async create(createUserDto: CreateUserDto, currentUser: any) {
    const roles = await this.roleService.findOne(createUserDto.roleId);
    const superior = await this.findByUsername(currentUser.username);

    const check = await this.usersRepository.findOne({
      username: createUserDto.username,
    });

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

    const salt = randomStringGenerator();

    const userData = new User();

    userData.id = uuid.v4();
    userData.username = createUserDto.username;
    userData.password = await hashPassword(createUserDto.password, salt);
    userData.salt = salt;
    if (createUserDto.superior) {
      userData.superior = superior;
    } else {
      userData.superior = null;
      userData.partner = createUserDto.partner;
    }
    userData.roles = roles;

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

      const dataCoaWallet = new InputCoaDto();
      dataCoaWallet.user = userData;
      dataCoaWallet.balanceType = balanceType.CREDIT;
      dataCoaWallet.type = coaType.WALLET;
      dataCoaWallet.coaEntityManager = manager;
      await this.coaService.create(dataCoaWallet);

      if (createUserDto.superior) {
        const dataCoaAP = new InputCoaDto();
        dataCoaAP.user = userData;
        dataCoaAP.balanceType = balanceType.CREDIT;
        dataCoaAP.relatedUserId = superior.id;
        dataCoaAP.type = coaType.ACCOUNT_PAYABLE;
        dataCoaAP.coaEntityManager = manager;
        await this.coaService.create(dataCoaAP);

        const dataCoaAR = new InputCoaDto();
        dataCoaAR.user = userData;
        dataCoaAR.balanceType = balanceType.DEBIT;
        dataCoaAR.relatedUserId = superior.id;
        dataCoaAR.type = coaType.ACCOUNT_RECEIVABLE;
        dataCoaAR.coaEntityManager = manager;
        await this.coaService.create(dataCoaAR);
      }
    });

    return userData;
  }

  findAll(page: number, id: string) {
    return this.usersRepository.findAndCount({
      skip: page * 10,
      take: 10,
      order: {
        version: 'DESC',
      },
      where: {
        id: Not(Equal(id)),
      },
    });
  }

  findByRoles(relationId: string, page: number) {
    return this.usersRepository.findAndCount({
      skip: page * 10,
      take: 10,
      where: {
        roles: relationId,
      },
      order: {
        updatedAt: 'DESC',
      },
    });
  }

  findBySuperrior(superriorId: string, page: number) {
    return this.usersRepository.findAndCount({
      skip: page * 10,
      take: 10,
      relations: ['roles'],
      where: {
        superior: superriorId,
      },
      order: {
        updatedAt: 'DESC',
      },
    });
  }

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

  async findByUsername(username: string) {
    try {
      return await this.usersRepository.findOneOrFail({
        where: {
          username: username,
        },
        relations: ['roles'],
      });
    } catch (e) {
      if (e instanceof EntityNotFoundError) {
        throw new HttpException(
          {
            statusCode: HttpStatus.NOT_FOUND,
            error: 'Data not found',
          },
          HttpStatus.NOT_FOUND,
        );
      } else {
        throw e;
      }
    }
  }

  async findOne(id: string) {
    const coa = await this.coaService.findByUser(id, coaType.WALLET);

    try {
      const userData = await this.usersRepository.findOneOrFail({
        where: {
          id: id,
        },
        relations: ['roles', 'superior'],
      });

      return {
        ...userData,
        wallet: coa.amount,
      };
    } catch (e) {
      if (e instanceof EntityNotFoundError) {
        throw new HttpException(
          {
            statusCode: HttpStatus.NOT_FOUND,
            error: 'Data not found',
          },
          HttpStatus.NOT_FOUND,
        );
      } else {
        throw e;
      }
    }
  }

  async update(id: string, updateUserDto: UpdateUserDto, currentUser: any) {
    try {
      await this.usersRepository.findOneOrFail(id);
    } catch (e) {
      if (e instanceof EntityNotFoundError) {
        throw new HttpException(
          {
            statusCode: HttpStatus.NOT_FOUND,
            error: 'Data not found',
          },
          HttpStatus.NOT_FOUND,
        );
      } else {
        throw e;
      }
    }

    const check = await this.usersRepository.findOne({
      username: updateUserDto.username,
      id: Not(id),
    });

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

    const userData = new User();

    userData.id = id;
    userData.username = updateUserDto.username;
    userData.partner = updateUserDto.partner;

    await this.connection.transaction(async (manager) => {
      const result = await manager.update(User, { id: id }, userData);
    });

    return userData;
  }

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

    await this.usersRepository.delete(id);
  }

  async findOneByUsername(username: string) {
    return this.usersRepository.findOneOrFail({
      where: {
        username,
      },
      relations: ['roles'],
    });
  }

  async findOneByPartner(partnerId: string) {
    try {
      return this.usersRepository.findOneOrFail({
        relations: ['roles'],
        where: {
          partner: partnerId,
        },
      });
    } catch (e) {
      if (e instanceof EntityNotFoundError) {
        throw new HttpException(
          {
            statusCode: HttpStatus.NOT_FOUND,
            error: 'Data not found',
          },
          HttpStatus.NOT_FOUND,
        );
      } else {
        throw e;
      }
    }
  }
}