package objects

import (
	"errors"
	"fmt"
	"mvc/interfaces"
)

type BankAccountModel struct {
	kontostand float64
	observer   []interfaces.IObserver
}

func NewBankAccountModel() BankAccountModel {
	return BankAccountModel{}
}

func (bm *BankAccountModel) GetBalance() float64 {
	return bm.kontostand
}

func (bm *BankAccountModel) AddObserver(observer interfaces.IObserver) error {
	bm.observer = append(bm.observer, observer)
	return nil
}

func (bm *BankAccountModel) NotifyObserver() error {

	if len(bm.observer) <= 0 {
		return errors.New("no observer found")
	}

	for _, observer := range bm.observer {
		observer.Update()
	}

	return nil
}
func (bm *BankAccountModel) Deposit(balance float64) error {

	if balance <= 0 {
		return errors.New("balance cannot be 0")
	}

	fmt.Printf("balance: %v", balance)

	bm.kontostand += balance

	fmt.Printf("balance: %v", bm.kontostand)

	bm.NotifyObserver()
	return nil
}

func (bm *BankAccountModel) Withdraw(balance float64) error {

	if balance <= 0 {
		return errors.New("balance cannot be 0")
	}

	fmt.Printf("balance: %v", balance)

	bm.kontostand -= balance

	fmt.Printf("balance: %v", bm.kontostand)

	bm.NotifyObserver()
	return nil
}