Bank

class Bank {
  constructor(bankName) {
    this._bankName = bankName;
    this.allCustomers = [];
  }

  updateTransactions(currentCustomer, operation, amount) {
    if (!currentCustomer.transactions) {
      currentCustomer.transactions = [
        {
          n: 1,
          operation,
          amount,
        },
      ];
    } else {
      // store the transaction information to this customer
      // update the transaction ID
      let lastTransactionId =
        currentCustomer.transactions[currentCustomer.transactions.length - 1].n;

      currentCustomer.transactions.push({
        n: ++lastTransactionId,
        operation,
        amount,
      });
    }
  }

  idFound(id) {
    return this.allCustomers.find(
      (customerObj) => customerObj.personalId === id
    );
  }

  newCustomer(customer) {
    // console.log('customer: ', customer); // Delete
    const { firstName, lastName, personalId } = customer;

    // check if the customer is already registered

    let errorMessage = `${firstName} ${lastName} is already our customer!`;
    if (this.idFound(personalId)) {
      throw new Error(errorMessage);
    }

    // otherwise, add the customer and return customer details
    // create customer
    this.allCustomers.push(customer);
    return customer;
  }

  depositMoney(personalId, amount) {
    (personalId = Number(personalId)), (amount = Number(amount));
    // console.log('ID: ', personalId, 'amount: ', amount); // Delete

    // check if personalId corresponds to an id in this.allCustomers
    // error => 'We have no customer with this ID!'
    let errorMessage = 'We have no customer with this ID!';
    let currentCustomer = this.idFound(personalId);
    if (!currentCustomer) {
      throw new Error(errorMessage);
    }

    // if there is no balance account, create one
    if (!currentCustomer.totalMoney) {
      currentCustomer.totalMoney = 0;
    }

    // add the amount to the corresponding customer's totalMoney
    currentCustomer.totalMoney += amount;

    // update transaction history
    this.updateTransactions(currentCustomer, 'deposit', amount);

    // return the total money of the customer
    return `${currentCustomer.totalMoney}$`;
  }

  withdrawMoney(personalId, amount) {
    (personalId = Number(personalId)), (amount = Number(amount));
    // console.log('ID: ', personalId, 'amount: ', amount); // Delete

    // check if personalId corresponds to an id in this.allCustomers
    // error => 'We have no customer with this ID!'
    let errorMessage = 'We have no customer with this ID!';
    let currentCustomer = this.idFound(personalId);
    if (!currentCustomer) {
      throw new Error(errorMessage);
    }

    // if not enough money in account to withdraw
    errorMessage = `${currentCustomer.firstName} ${currentCustomer.lastName} does not have enough money to withdraw that amount!`;
    if (currentCustomer.totalMoney < amount) {
      throw new Error(errorMessage);
    }

    // if no error subtract amount from totalMoney
    currentCustomer.totalMoney -= amount;
    // update transaction history
    this.updateTransactions(currentCustomer, 'withdraw', amount);

    // return the total money of the customer
    return `${currentCustomer.totalMoney}$`;
  }

  customerInfo(personalId) {
    const output = [];
    personalId = Number(personalId);
    // console.log('ID: ', personalId); // Delete

    // check if personalId corresponds to an id in this.allCustomers
    // error => 'We have no customer with this ID!'
    let currentCustomer = this.idFound(personalId);
    if (!currentCustomer) {
      throw new Error(errorMessage);
    }

    // if no error return all the customer info
    output.push(`Bank name: ${this._bankName}`);

    output.push(
      `Customer name: ${currentCustomer.firstName} ${currentCustomer.lastName}`
    );
    output.push(`Customer ID: ${currentCustomer.personalId}`);
    output.push(`Total Money: ${currentCustomer.totalMoney}$`);

    // for each transaction reversed
    output.push('Transactions:');
    currentCustomer.transactions.reverse().forEach((transaction) => {
      console.log(transaction);
      if (transaction.operation == 'withdraw') {
        output.push(
          `${transaction.n}. ${currentCustomer.firstName} ${currentCustomer.lastName} withdrew ${transaction.amount}$!`
        );
      } else {
        output.push(
          `${transaction.n}. ${currentCustomer.firstName} ${currentCustomer.lastName} made deposit of ${transaction.amount}$!`
        );
      }
    });

    return output.join('\n');
  }
}