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

public class TurretController : MonoBehaviour, IPooledObject{

    [SerializeField] float speed = 1f;
    [SerializeField] Animator anim = default;
    [SerializeField] GameObject head = default;
    [SerializeField] GameObject headObj = default;

    [Space]
    [SerializeField, Range(0, 3f)] float firstAttackDelay = 1f;
    [SerializeField] int numberOfDisks = 10;
    int currentDisk;
    [SerializeField] float maxHeigth = 1f;
    [SerializeField] float minHeigth = 0f;
    [SerializeField] GameObject turretObject = default;
    [SerializeField] Transform shootPos = default;

    [Space]
    [SerializeField, Range(0, 15)] float shootingDistance = 7f;
    [SerializeField, Range(0, 5)] float aimingTime = 2f;
    [SerializeField, Range(0, 1)] float attackDelay = .25f;
    [SerializeField] LayerMask whatIsPlayer = default;
    [SerializeField] LayerMask whatIsWall = default;
    PlayerController player;
    float rotationVelocity;
    bool canAttack;
    bool aiming;
    bool prepareShooting;
    bool playerDetected;

    NavMeshAgent agent;

    [HideInInspector] public EnemySpawner spawner;
    [HideInInspector] public RoomTrigger room;

    // Start is called before the first frame update
    void Awake(){
        agent = FindObjectOfType<NavMeshAgent>();
        player = FindObjectOfType<PlayerController>();
        agent.speed = speed;
    }

    public void OnObjectSpawn(){
        currentDisk = numberOfDisks;
        turretObject.transform.localPosition = new Vector3(minHeigth + (maxHeigth - minHeigth) / numberOfDisks * currentDisk, 0, 0);
        playerDetected = aiming = prepareShooting = canAttack = false;
        agent.Warp(transform.position);
        agent.isStopped = true;
        StartCoroutine(FirstAttackDelay());
    }

    IEnumerator FirstAttackDelay(){
        yield return new WaitForSeconds(firstAttackDelay);
        canAttack = true;
    }

    void Update(){
        if(!playerDetected && Physics.CheckSphere(transform.position, shootingDistance, whatIsPlayer)){
            agent.isStopped = false;
            playerDetected = true;
        }

        Vector3 dire = (player.transform.position - (transform.position + Vector3.up * .3f)).normalized;
        //Ray rayx = new Ray(transform.position + Vector3.up * .3f, dire * Vector3.Distance(transform.position + Vector3.up * .3f, player.transform.position));
        //Debug.DrawRay(rayx.origin, rayx.direction * Vector3.Distance(transform.position + Vector3.up, player.transform.position));

        if (Physics.CheckSphere(transform.position, shootingDistance, whatIsPlayer) && canAttack && currentDisk > 0){
            Ray ray = new Ray(transform.position + Vector3.up * .3f, dire * Vector3.Distance(transform.position + Vector3.up * .3f, player.transform.position));
            if (!Physics.Raycast(ray, Vector3.Distance(transform.position + Vector3.up * .3f, player.transform.position), whatIsWall)){
                StartCoroutine(Shoot());
                canAttack = false;
            }
        }

        if (Physics.CheckSphere(transform.position + Vector3.up, shootingDistance, whatIsPlayer) && canAttack && currentDisk == 0){
            Ray ray = new Ray(transform.position + Vector3.up * .3f, dire * Vector3.Distance(transform.position + Vector3.up * .3f, player.transform.position));
            if (!Physics.Raycast(ray, Vector3.Distance(transform.position + Vector3.up * .3f, player.transform.position), whatIsWall)){
                StartCoroutine(ShootHead());
                canAttack = false;
            }
        }

        if (aiming){
            if (!prepareShooting){
                agent.SetDestination(player.transform.position);
            }else{
                Vector3 pos = player.transform.position - transform.position;
                float rotY = Mathf.Atan2(-pos.z, pos.x) * Mathf.Rad2Deg;
                float angle = Mathf.SmoothDampAngle(transform.eulerAngles.y, rotY + 90, ref rotationVelocity, .1f);
                transform.rotation = Quaternion.Euler(0f, angle, 0f);
            }
        }else if (playerDetected && !prepareShooting){
            agent.SetDestination(player.transform.position);
        }
    }

    IEnumerator ShootHead(){
        aiming = true;
        yield return new WaitForSeconds(aimingTime);
        agent.isStopped = true;
        prepareShooting = true;
        yield return new WaitForSeconds(attackDelay);
        agent.isStopped = false;
        aiming = false;
        prepareShooting = false;
        anim.SetTrigger("Shoot");
        currentDisk--;
        //turretObject.transform.localPosition = new Vector3(minHeigth + (maxHeigth - minHeigth) / numberOfDisks * currentDisk, 0, 0);
        headObj.SetActive(false);
        //FrisbieController frisbie = ObjectPooler.instance.SpawnFromPool("Disk", shootPos.position, transform.rotation).GetComponent<FrisbieController>();
        ObjectPooler.instance.SpawnFromPool("TurretHead", shootPos.position, transform.rotation);
        canAttack = true;
        gameObject.SetActive(false);
        player.percentage += Utils.RAM_cleanseSmall;
        room.Die(gameObject);
    }

    IEnumerator Shoot(){
        aiming = true;
        yield return new WaitForSeconds(aimingTime);
        agent.isStopped = true;
        prepareShooting = true;
        yield return new WaitForSeconds(attackDelay);
        agent.isStopped = false;
        aiming = false;
        prepareShooting = false;
        anim.SetTrigger("Shoot");
        currentDisk--;
        turretObject.transform.localPosition = new Vector3(minHeigth + (maxHeigth - minHeigth) / numberOfDisks * currentDisk, 0, 0);
        ObjectPooler.instance.SpawnFromPool("EnemyDisk", shootPos.position, transform.rotation);
        //FrisbieController frisbie = Instantiate(bullet, transform.position + Vector3.up, transform.rotation).GetComponent<FrisbieController>();
        canAttack = true;
    }

    void OnTriggerEnter(Collider col){
        if (col.CompareTag("Disk")){
            player.percentage += Utils.RAM_cleanseSmall;
            gameObject.SetActive(false);
            col.GetComponent<Rigidbody>().velocity = Vector3.zero;
            room.Die(gameObject);
            GameMaster.Instance.Pooler.SpawnFromPool("EnemyExplosion", transform.position);
            if (Utils.spawnDisk())
                GameMaster.Instance.Pooler.SpawnFromPool("DiskPickup", transform.position);
            StopAllCoroutines();
        }
    }
    void OnCollisionEnter(Collision col){
        if (col.gameObject.CompareTag("Disk")){
            player.percentage += Utils.RAM_cleanseSmall;
            gameObject.SetActive(false);
            col.gameObject.GetComponent<Rigidbody>().velocity = Vector3.zero;
            room.Die(gameObject);
            GameMaster.Instance.Pooler.SpawnFromPool("EnemyExplosion", transform.position);
            if (Utils.spawnDisk())
                GameMaster.Instance.Pooler.SpawnFromPool("DiskPickup", transform.position);
            StopAllCoroutines();
        }
    }

    void OnDrawGizmosSelected(){
        Gizmos.DrawWireSphere(transform.position, shootingDistance);
    }
}