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

public enum Weapon{
    Police9mm,
    PortableMagnum,
}

public class WeaponManager : MonoBehaviour {
    public static WeaponManager instance;
    private int currentWeaponIndex = 0;
    private Weapon[] weapons = { Weapon.Police9mm, Weapon.Police9mm };

    void Awake(){
        if(instance == null){
            instance = this;
        }
        else{
            Destroy(gameObject);
        }
    }

    void Start(){
        SwitchTocurrentWeapon();
    }

    void Update(){
        CheckWeaponSwitch();
    }

    void SwitchTocurrentWeapon(){
        for(int i = 0; i < transform.childCount; i++){
            transform.GetChild(i).gameObject.SetActive(false);
        }
        transform.Find(weapons[currentWeaponIndex].ToString()).gameObject.SetActive(true);
    }

    void CheckWeaponSwitch(){
        float mousewheel = Input.GetAxis("Mouse ScrollWheel");

        // Forward
        if(mousewheel > 0){
            SelectPreviousWeapon();
        }
        // Backward
        else if(mousewheel < 0){
            SelectNextWeapon();
        }
    }

    void SelectPreviousWeapon() {
        if(currentWeaponIndex == 0) {
            currentWeaponIndex = weapons.Length - 1;
        }
        else {
            currentWeaponIndex++;
        }

        SwitchTocurrentWeapon();
    }

    void SelectNextWeapon() {
        if(currentWeaponIndex >= (weapons.Length - 1)) {
            currentWeaponIndex = 0;
        }
        else {
            currentWeaponIndex++;
        }

        SwitchTocurrentWeapon();
    }
}