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


public class WeaponManager : NetworkBehaviour
{
    public int currentWeaponIndex = 0;
    private int lastWeaponIndex = 0;
    private int counter = 0;
    public List<GameObject> activeWeapons = new List<GameObject>();
    private ProcedualAnimationController procedualAnimationController;
    
    [SerializeField] GameObject gunHolster;
    [SerializeField] Camera cam;

    private void Awake()
    {
        
        procedualAnimationController = GetComponent<ProcedualAnimationController>();
    }

    void Update() {
        if (isLocalPlayer) {
            if(Input.GetAxis("Mouse ScrollWheel") > 0f){ // Scroll up
                lastWeaponIndex = currentWeaponIndex;
                int nextActive = SearchForNext(activeWeapons, lastWeaponIndex, -1);
                if (nextActive != -1) { // -1 no next found
                    currentWeaponIndex = nextActive;
                    activeWeapons[currentWeaponIndex].SetActive(true);
                    procedualAnimationController.OnSwitchWeapon(activeWeapons[currentWeaponIndex].gameObject);
                    // play weapon switch animation
                }
            }
            else if (Input.GetAxis("Mouse ScrollWheel") < 0f){ // Scroll down
                lastWeaponIndex = currentWeaponIndex;
                int nextActive = SearchForNext(activeWeapons, lastWeaponIndex, 1);
                if (nextActive != -1) { // -1 no next found
                    currentWeaponIndex = nextActive;
                    activeWeapons[currentWeaponIndex].SetActive(true);
                    procedualAnimationController.OnSwitchWeapon(activeWeapons[currentWeaponIndex].gameObject);
                    // play weapon switch animation
                }
            }
            
            if (Input.GetButtonDown("Interact")) // e 
            {
                PickupWeapon();
            
            }else if (Input.GetButtonDown("Drop")) // q Droping weapon 
            {
                if(activeWeapons[currentWeaponIndex] != null)
                {
                    dropWeapon(); // Throws weapon away
                    int nextActive = SearchForNext(activeWeapons, currentWeaponIndex, 1);
                    if (nextActive != -1) { // -1 no next found
                        currentWeaponIndex = nextActive;
                        activeWeapons[currentWeaponIndex].SetActive(true);
                        procedualAnimationController.OnSwitchWeapon(activeWeapons[currentWeaponIndex].gameObject);
                        // play weapon switch animation
                    }
                }
            }
        }
    }

    private int SearchForNext(List<GameObject> l, int lastActive = 0, int direction = 1) {
        int size = l.Count;
        bool condition = true;
        int counter = 0;
        foreach (GameObject obj in l) { if(obj == null) { counter++;  } }
        if(counter < 4) {
            if (lastActive <= -1) { lastActive = size; }
            if (lastActive >= l.Count) { lastActive = 0; }
            for (int i = lastActive + direction; condition; i += direction) {
                if (i >= l.Count) { i = 0; size = lastActive; }
                else if (i < 0) { i = size - 1; size = -1; }
                if (l[i] != null) {
                    if (l[lastActive] != null) { l[lastActive].SetActive(false); }
                    return i;
                }
                if (direction == 1) {
                    if (i <= size - 1) { condition = true; }
                    else { condition = false; }
                } else if (direction == -1) {
                    if (i >= size - 1) { condition = true; }
                    else { condition = false; }
                }
            }
        }
        return -1;
    }

    public GameObject getCurrentWeapon()
    {
        return activeWeapons[currentWeaponIndex].gameObject;
    }

    private void PickupWeapon() {
        if (Physics.Raycast(cam.transform.position, cam.transform.forward, out RaycastHit hit)) 
        {

            Debug.Log(hit.transform.name);
            if (hit.transform.tag == "Weapon") // If Object is a weapon and the weapon is not in the current active weapons
            {
                foreach (GameObject obj in activeWeapons) { // Disable all weapons
                    if (obj != null) { obj.SetActive(false); }
                }
                hit.transform.parent = gunHolster.transform; // Parent weapon to gunHolster
                hit.rigidbody.isKinematic = true;
                hit.rigidbody.useGravity = false;
                hit.transform.GetComponent<BoxCollider>().enabled = false; // Disable Boxcollider 
                //hit.transform.position = cam.transform.position;
                switch (hit.transform.GetComponent<Weapon>().WeaponKind.ToString()) { // Adding weapon to inventory slot
                    case "Rifle": putWeaponInArray(0, hit); break;
                    case "Pistole": putWeaponInArray(1, hit); break;
                    case "Knife": putWeaponInArray(2, hit); break;
                    case "Grenade": putWeaponInArray(3, hit); break;
                    default: break;
                }
            }
        }
    }

    private bool putWeaponInArray(int index, RaycastHit hit) {
        if (activeWeapons[currentWeaponIndex] != null) {
            dropWeapon(); // Throws weapon away
        }
        activeWeapons[index] = hit.transform.gameObject;
        activeWeapons[index].SetActive(true);
        currentWeaponIndex = index;
        procedualAnimationController.OnSwitchWeapon(activeWeapons[currentWeaponIndex].gameObject);
        return true;
    }

    private bool dropWeapon()
    {
        if(currentWeaponIndex != 2)
        {
            GameObject currentWeapon = activeWeapons[currentWeaponIndex];
            currentWeapon.SetActive(true);
            Rigidbody rigid = currentWeapon.GetComponent<Rigidbody>();
            rigid.useGravity = true;
            rigid.isKinematic = false;
            rigid.velocity = cam.transform.forward * 10 + cam.transform.up * 2;
            currentWeapon.GetComponent<BoxCollider>().enabled = true;
            currentWeapon.gameObject.transform.SetParent(null);
            activeWeapons[currentWeaponIndex] = null;

            return true;
        }
        else
        {
            return false;
        }
        
    }

}