bank

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

    newCustomer(customer) {
        //object {firstName, lastName, personalId}.
        if (
            this.allCustomers.find((c) => c.personalId == customer.personalId)
        ) {
            throw new Error(
                `${customer.firstName} ${customer.lastName} is already our customer!`
            );
        }
        let currentData = Object.assign({}, customer);
        customer.totalMoney = 0;
        customer.transactions = []; //{type:amount}
        this.allCustomers.push(customer);
        return currentData;
    }
    depositMoney(personalId, amount) {
        let currentCustomer = this._findCustomerById(personalId);
        if (!currentCustomer)
            throw new Error(`We have no customer with this ID!`);
        currentCustomer.totalMoney += amount;
        currentCustomer.transactions.push({ 'made deposit of': amount });
        return `${currentCustomer.totalMoney}$`;
    }
    withdrawMoney(personalId, amount) {
        let currentCustomer = this._findCustomerById(personalId);
        if (!currentCustomer) {
            throw new Error('We have no customer with this ID!');
        }
        if (currentCustomer.totalMoney < amount) {
            throw new Error(
                `${currentCustomer.firstName} ${currentCustomer.lastName} does not have enough money to withdraw that amount!`
            );
        }
        currentCustomer.totalMoney -= amount;
        currentCustomer.transactions.push({ withdrew: amount });
        return `${currentCustomer.totalMoney}$`;
    }
    customerInfo(personalId) {
        let currentCustomer = this._findCustomerById(personalId);
        if (!currentCustomer) {
            throw new Error('We have no customer with this ID!');
        }
        let result = [
            `Bank name: ${this._bankName}
Customer name: ${currentCustomer.firstName} ${currentCustomer.lastName}
Customer ID: ${personalId}
Total Money: ${currentCustomer.totalMoney}$
Transactions:`,
        ];
        for (let i = currentCustomer.transactions.length - 1; i >= 0; i--) {
            let [type, amnt] = Object.entries(
                currentCustomer.transactions[i]
            )[0];
            result.push(
                `${i + 1}. ${currentCustomer.firstName} ${
                    currentCustomer.lastName
                } ${type} ${amnt}$!`
            );
        }
        return result.join('\n');
    }
    _findCustomerById(id) {
        return this.allCustomers.find((c) => c.personalId == id);
    }
}