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

public class EnemyController : MonoBehaviour
{
    private NavMeshAgent agent;
    private Vector3 startingPos;
    private Animator anim;
    private AudioSource aSource;
    private GameObject player;
    private GameManager gameMgr;
    public List<Transform> navPoints = new List<Transform>();
    public bool mainEnemy;
    private bool engagePlayer;

    private void Awake()
    {
        if(mainEnemy)
        {
            agent = GetComponent<NavMeshAgent>();
            anim = GetComponent<Animator>();
        }
        else
        {
            agent = GetComponent<NavMeshAgent>();
        }

        aSource = GetComponent<AudioSource>();
        startingPos = transform.position;
    }

    private void Start()
    {
        player = ReferenceManager.GetObject(8);
        gameMgr = ReferenceManager.GetGameManager();
    }

    private void Update()
    {
        Vector3 playerPos = player.transform.position;

        if(!engagePlayer)
        {
            if (Vector3.Distance(transform.position, playerPos) <= 17.5f)
            {
                agent.SetDestination(playerPos);

                if (mainEnemy)
                    anim.SetBool("Walking", true);

                return;
            }

            if (Vector3.Distance(transform.position, agent.destination) <= 5)
            {
                int randomIndex = Random.Range(0, navPoints.Count);

                agent.SetDestination(navPoints[randomIndex].position);

                if (mainEnemy)
                    anim.SetBool("Walking", true);
            }
        }
        else
        {
            agent.SetDestination(playerPos);

            if (mainEnemy)
            {
                if(Vector3.Distance(transform.position, playerPos) <= 1f)
                {
                    anim.SetBool("Walking", false);
                    agent.isStopped = true;
                }
                else
                {
                    anim.SetBool("Walking", true);
                }
            }
            return;
        }


    }

    private void OnTriggerEnter(Collider other)
    {
        if(other.gameObject.name == "FPSController" && gameMgr.GetGameOverState() == false)
        {
            gameMgr.OnGameOver();
            agent.isStopped = true;
        }
    }

    public void SetAudioSourceState(bool state)
    {
        if (state)
            aSource.Play();
        else
            aSource.Stop();
    }

    public void OnGameReset()
    {
        transform.position = startingPos;
        engagePlayer = false;
    }

    public void TargetPlayer()
    {
        engagePlayer = true;
    }
}