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

public class gun : MonoBehaviour
{
    /*[Header("Weapon prefab")]
    public GameObject wepaonInHand;
    public GameObject pickUpWeapon;*/
    

    [Header("Weapon Damage Info")]
// this is what does damage to objects that have the "Target" script on them 
    public float damage = 10f;
    public float range = 100f;
    public float impactForce = 30f;
    public float fireRate = 15f;
    public enum Mode { Mode1, Mode2, Mode3 }
    

    [Header("Weapon Ammo & Info")]
// this is the ammo information for the gun this script is attacted to. 
    public int maxAmmo = 15;
    public int currentAmmo;
    public int maxNumberOfClips = 1;
    public int currentClips = 0;

[Header("Weapon Recoil Info")]
// this is the recoil information you can play around with this to setup the recoil for your gun 
    public float recoil;
    public float maxRecoilX = 10;//Play Around with these Variables
    public float maxRecoilY = 10;
    public float recoilSpeed = 5;

 [Header("Weapon Ejector Info")]
 // the ejector for the bullet prefab, make sure that you orientate it so  that it pops out the ejector correctly.
    public float myforce;
    public Transform bulletEject;
    public GameObject shellCasing;    

[Header("Weapon Sway Info 1")] 
// this is the weapon sway that you have. play around with these numbers 
    public float mouseX;
    public float mouseY;
    public float speed;
    Quaternion rotationSpeed;

[Header("Weapon Sway Info 2")] 
// this is the weapon sway that you have. play around with these numbers
    public float tiltAngle = 4.0f;
    public float tiltAmount = 0.001f;
    public float smoothComplexity = 3.0f;

[Header("Weapon Aim Info")]
//aiming with your weapon is done via script by using its vector 3 position.
    public float scopedFOV = 15f;
    public float normalFOV;
    public Vector3 aimDownSight;
    public Vector3 hipFire;
    

[Header("Weapon Camera Info")]
// just need both of your cameras here , if your new to unity please look at how my player prefab in the demo folders. is setup to make your own.
    public Camera mainCamera;
    public Camera fpsCam;

[Header("Weapon Particle Systems Info")]
// gotta make those particle systems for your weapons 
    public ParticleSystem muzzleFlash;
    public GameObject impactPrefab;
    public GameObject impactPrefabmetal;
    public GameObject impactPrefabwood;
    public GameObject impactPrefabwater;
    public GameObject impactPrefabstone;
    public GameObject impactPrefabflesh;
    public GameObject impactPrefabsand;
    private GameObject impactGO;

    [Header("Weapon Audio Info")]
// this is what makes some noise when your gun does somthing.
    public AudioSource audioSource;
    public AudioClip gunShotFire;    
    public AudioClip gunShotEmpty;


[Header("Weapon Reloading Info")]
//your wepaon reloading informations , play around with it to make different reloading times.
    public float nextTimeToFire = 0f;
    public float reloadTime = 1f;
    public bool isReloading = false;

[Header("Weapon Animator Info")]
//animator for some animations on your weapon.
    public Animator animator;

[Header("UI Manager")]
//UI information thats is not being used at the momment.
   // public uiManager uimanager;
    public GameObject crossHair;
    
    /// <summary>
    /// all of my public variables used in this script
    /// 
    /// </summary>

  





    private void Start()
    {
        

       // uimanager.refreshAmmo(currentAmmo);
        audioSource = GetComponent<AudioSource>();

        // Start edits //
        if (currentAmmo <= 0 && maxNumberOfClips > 0)
        {
            currentClips = maxNumberOfClips;
            currentAmmo = maxAmmo;

            // If you want to take a clip away at start (ie. player has just loaded one in)
            // uncomment the thing below
             currentClips -= 1;
        }
        // End edits //
    }
    public void AddRecoil()
    {
        recoil += 0.01f;
    }

    void Recoil() // this is the function to add recoil to the weapon " gun " 
    {
        if (recoil > 0)
        {
            var maxRecoil = Quaternion.Euler(maxRecoilX + Random.Range(-10, 10), maxRecoilY + Random.Range(-10, 10), 0);
            transform.localRotation = Quaternion.Slerp(transform.localRotation, maxRecoil, Time.deltaTime * recoilSpeed); // This controls the actual recoil
            transform.localEulerAngles = new Vector3(transform.localEulerAngles.x, transform.localEulerAngles.y, transform.localEulerAngles.z); // This one also
            recoil -= Time.deltaTime;
        }
        else
        {
            recoil = 0;
            var minRecoil = Quaternion.Euler(0, 0, 0);
            transform.localRotation = Quaternion.Slerp(transform.localRotation, Quaternion.identity, Time.deltaTime * recoilSpeed / 2);
            transform.localEulerAngles = new Vector3(transform.localEulerAngles.x, transform.localEulerAngles.y, transform.localEulerAngles.z);

        }
    }


private void OnEnable() // private function for calling the reloading 
    {
        isReloading = false;
        animator.SetBool("Reloading", false);
    }

    // Update is called once per frame

    void Update()
    {

        /*if (Input.GetKeyDown("e"))
        {
            wepaonInHand.SetActive(false);
            Instantiate(pickUpWeapon, transform.position, transform.rotation);
        }*/
       
        Recoil();

        // uimanager.refreshAmmo(maxNumberOfClips);

        if (isReloading)
            return;

        if (currentAmmo <= 0)
        {
            StartCoroutine(Reload());
            return;

            
        }

        // Start edits //
        if (currentAmmo > 0 && Input.GetButton("Fire1") && Time.time >= nextTimeToFire)
            
        {
            nextTimeToFire = Time.time + 1f / fireRate;
            Shoot();
            Recoil();
        }

    { 
        float tiltX = Input.GetAxis("Mouse X") * tiltAngle;
        float tiltY = Input.GetAxis("Mouse Y") * tiltAngle;
        Quaternion target = Quaternion.Euler(tiltY, tiltX, 0);
        transform.localRotation = Quaternion.Slerp(transform.localRotation, target, Time.deltaTime * smoothComplexity);
    }

        //
       // mouseX = Input.GetAxis("Mouse X");
        //mouseY = Input.GetAxis("Mouse Y");
        //rotationSpeed = Quaternion.Euler(-mouseY, mouseX, 0);
        //transform.localRotation = Quaternion.Slerp(transform.localRotation, rotationSpeed, speed * Time.deltaTime);
        // End edits //

       if (Input.GetButtonDown("Fire2"))
        {
            transform.localPosition = aimDownSight;
            crossHair.SetActive(false);
            normalFOV = mainCamera.fieldOfView;
            mainCamera.fieldOfView = scopedFOV;
        }

        if (Input.GetButtonUp("Fire2"))
        {
            transform.localPosition = hipFire;
            crossHair.SetActive(true);
            mainCamera.fieldOfView = normalFOV;
        }
    }

    IEnumerator Reload()
    {
        Debug.Log("Reloading....");

        // Start edits //
        if (currentClips == 0)
        {
            // No clips? Then no reload for you.
            noMoreBullets();
            Debug.Log("Reload failed; no clips!");
        }
        else
        {
            isReloading = true;

            currentClips -= 1;    // Take a clip away
            yield return new WaitForSeconds(reloadTime);

            animator.SetBool("Reloading", false);

            currentAmmo = maxAmmo;
            isReloading = false;
        }
        // End edits //

    }

    // Why is this public? //
    void noMoreBullets()
    {
        if (Input.GetButtonDown("Fire1"))
        {
            audioSource.PlayOneShot(gunShotEmpty, 0.7F);
        }
        
        return;
    }


    void impactParticleSystems(GameObject particlesystem)
    {

    }

    void Shoot()
    {

        muzzleFlash.Play();
        AddRecoil();
        RaycastHit hit;
        currentAmmo--;

        // UI refresh
       // uimanager.refreshAmmo(currentAmmo);

        GameObject shellCasings = Instantiate(shellCasing, bulletEject.position, bulletEject.rotation);
        shellCasings.GetComponent<Rigidbody>().AddForce(bulletEject.right * myforce);
        Destroy(shellCasings, 2f);

        audioSource.PlayOneShot(gunShotFire, 0.7F);

        if (Physics.Raycast(fpsCam.transform.position, fpsCam.transform.forward, out hit, range))
        {
            Debug.Log(hit.transform.name);
            switch (hit.collider.tag)
            {
                case "flesh":
                    impactGO = impactPrefabflesh;
                    break;
                case "sand":
                    impactGO = impactPrefabsand;
                    break;
                case "wood":
                    impactGO = impactPrefabwood;
                    break;
                case "metal":
                    impactGO = impactPrefabmetal;
                    break;
                case "stone":
                    impactGO = impactPrefabstone;
                    break;
                case "water":
                     impactGO = impactPrefabwater;
                    break;
                default:
                    impactGO = impactPrefab;
                    break;
            }



            Destructiable target = hit.transform.GetComponent<Destructiable>();
            if (target != null)
            {
                target.TakeDamage(damage);
            }

            if (hit.rigidbody != null)
            {
                hit.rigidbody.AddForce(hit.normal * impactForce);
            }

            GameObject impactgo = Instantiate(impactGO, hit.point, Quaternion.LookRotation(hit.normal));
            Destroy(impactgo, 2f);

        }


    }


}