Schmup-JIN/Assets/Scripts/AbstractShooter.cs

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public abstract class AbstractShooter : MonoBehaviour
{
    // Energy consumed per shot
    [SerializeField] protected float _energyCost = 2;
    public float EnergyCost => _energyCost;
    
    // Minimum time between two shots
    protected float _minDeltaTime = 1f / 5;

    [SerializeField] private int _shotsPerSecond = 5;
    public int ShotsPerSecond
    {
        get { return _shotsPerSecond; }
        set
        {
            _shotsPerSecond = value;
            _minDeltaTime = 1f / _shotsPerSecond;
        }
    }

    private float _timeLeft;
    
    // Start is called before the first frame update
    void Start()
    {
        _minDeltaTime = 1f / ShotsPerSecond;
        _timeLeft = 0;
    }

    void Update()
    {
        _timeLeft -= Time.deltaTime;
    }

    private void OnValidate()
    {
        _minDeltaTime = 1f / ShotsPerSecond;
    }

    public bool Shoot(float currentEnergy)
    {
        if (_timeLeft <= 0 && currentEnergy > 0)
        {
            InstantiateProjectiles();
            _timeLeft = _minDeltaTime;
            return true;
        }

        return false;
    }
    protected abstract void InstantiateProjectiles();
}