using System;
using UnityEngine;

public class SniperEnemy : Enemy
{
    [SerializeField]
    GameObject bullet;

    [SerializeField]
    GameObject rifleStart;

    [SerializeField]
    float cooldown = 1f;

    float timer = 0;
    [SerializeField]float area = 25;

    private enum SniperState
    {
        Wait,
        Prepare,
        Shoot
    }

    private SniperState _currentState = SniperState.Wait;

    void Start() { }

    public override void Move()
    {
        if (_currentState == SniperState.Wait)
        {
            GetComponent<CharacterController>().Move(transform.forward * Time.deltaTime * 2f);
            timer += Time.deltaTime;
            if (timer > 10)
            {
                transform.Rotate(new Vector3(0, 90, 0));
                timer = 0;
            }
        }
    }

    public override void Attack()
    {
        switch (_currentState)
        {
            case SniperState.Wait:
                if (Vector3.Distance(transform.position, player.transform.position) <= area)
                {
                    _currentState = SniperState.Prepare;
                    timer = 0;
                }
                break;
            case SniperState.Prepare:
                timer += Time.deltaTime;
                transform.LookAt(player.transform.position);
                if (timer > cooldown)
                {
                    _currentState = SniperState.Shoot;
                    timer = 0;
                }
                if (Vector3.Distance(transform.position, player.transform.position) > area)
                {
                    _currentState = SniperState.Wait;
                }
                    break;
            case SniperState.Shoot:
                timer = 0;
                GameObject buf = Instantiate(bullet);
                buf.transform.position = rifleStart.transform.position;
                buf.transform.rotation = transform.rotation;
                buf.GetComponent<Bullet>().setDirection(transform.forward);
                buf.GetComponent<Bullet>().MakeSniper();
                _currentState = SniperState.Prepare;
                break;
        }
    }
}