using UnityEngine;
using TMPro;

public class GunSystem : MonoBehaviour
{

    //Animations

    //Gun stats
    public int damage;
    public float timeBetweenShooting, spread, range, reloadTime, timeBetweenShots;
    public int magazineSize, bulletsPerTap;
    public bool allowButtonHold;
    int bulletsLeft, bulletsShot;

    //bools
    bool shooting, readyToShoot, reloading;

    //Reference
    public Camera fpsCam;
    public Transform attackPoint;
    public RaycastHit rayHit;
    public LayerMask whatIsEnemy;


    //Graphics
    public GameObject muzzleFlash, bulletHoleGraphic;
    public float camShakeMagnitude, camShakeDuration;
    public TextMeshProUGUI text;

    private void Awake()
    {
        bulletsLeft = magazineSize;
        readyToShoot = true;

    }
    private void Update()
    {
        MyInput();

        //SetText
        text.SetText(bulletsLeft + " / " + magazineSize);
    }
    private void MyInput()
    {
        if (allowButtonHold) shooting = Input.GetKey(KeyCode.Mouse0);
        else shooting = Input.GetKeyDown(KeyCode.Mouse0);

        if (Input.GetKeyDown(KeyCode.R) && bulletsLeft < magazineSize && !reloading) Reload();

        //Shoot
        if (readyToShoot && shooting && !reloading && bulletsLeft > 0)
        {
            bulletsShot = bulletsPerTap;
            Shoot();
        }
    }
    private void Shoot()
    {
        readyToShoot = false;

        //Spread
        float x = Random.Range(-spread, spread);
        float y = Random.Range(-spread, spread);

        //Calculate Direction with Spread
        Vector3 direction = fpsCam.transform.forward + new Vector3(x, y, 0);

        //Play Animation


        //RayCast
        if (Physics.Raycast(fpsCam.transform.position, direction, out rayHit, range, whatIsEnemy))
        {
            Debug.Log(rayHit.collider.name);
            TriggerAppear platform = rayHit.collider.gameObject.GetComponent<TriggerAppear>();
            AIHealth health = rayHit.collider.gameObject.GetComponent<AIHealth>();
            if(platform != null)
            {
                platform.Platform.SetActive(true);
            }
            if(rayHit.collider.gameObject.tag == "Enemy")
            {
                if(health != null)
                {
                    health.Health -= damage;
                }
            }
        }

        //ShakeCamera

        //Graphics
        Instantiate(bulletHoleGraphic, rayHit.point + rayHit.normal * 0.002f, Quaternion.LookRotation(rayHit.normal), rayHit.collider.gameObject.transform);
        Instantiate(muzzleFlash, attackPoint.position, Quaternion.identity);

        bulletsLeft--;
        bulletsShot--;

        Invoke("ResetShot", timeBetweenShooting);

        if (bulletsShot > 0 && bulletsLeft > 0)
            Invoke("Shoot", timeBetweenShots);
    }
    private void ResetShot()
    {
        readyToShoot = true;
    }
    private void Reload()
    {
        reloading = true;
        Invoke("ReloadFinished", reloadTime);
    }
    private void ReloadFinished()
    {
        bulletsLeft = magazineSize;
        reloading = false;
    }
}