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

public class RaycastController : MonoBehaviour
{

    public float maxDistanceRay= 100f;
    public static RaycastController instance;
    public Text birdName;
    public Transform gunFlashTarget;
    public float fireRate = 1.6f;
    private bool nextShot = true;
    private string objName = "";

    AudioSource audio;
    public AudioClip[] clips;
    void Awake() {
        if (instance == null) {
            instance = this;
        }
    }

    public void playSound(int sound) {
        audio.clip = clips[sound];
        audio.Play();
    }
    
    // Start is called before the first frame update
    void Start()
    {
        StartCoroutine(spawnNewBird());
    }

    // Update is called once per frame
    void Update()
    {
        
    }

    public void Fire() {
        if(nextShot) {
            StartCoroutine(takeShot());
            nextShot = false;
        }
    }

    private IEnumerator takeShot() {
        Ray ray = Camera.main.ViewportPointToRay(new Vector3(0.5f, 0.5f, 0));
        RaycastHit hit;
        
        int layer_mask = LayerMask.GetMask("birdLayer");
        if(Physics.Raycast(ray, out hit, maxDistanceRay, layer_mask)) {
            //debug
            objName = hit.collider.gameObject.name;
            birdName.text = objName;
            Vector3 birdPosition =  hit.collider.gameObject.transform.position;

            if(objName == "Bird_Asset(Clone)") {
                GameObject Boom = Instantiate(Resources.Load("boom", typeof(GameObject))) as GameObject;
                Boom.transform.position = birdPosition;

                Destroy(hit.collider.gameObject);
                StartCoroutine(spawnNewBird());
                StartCoroutine(clearBoom());
            }
        }

        GameObject gunFlash = Instantiate(Resources.Load("gunFlashSmoke", typeof(GameObject))) as GameObject;
        gunFlash.transform.position = gunFlashTarget.position;

        yield return new WaitForSeconds(fireRate);
        nextShot = true;
    }
    private IEnumerator clearBoom() {
        yield return new WaitForSeconds(1.5f);
        GameObject[] smokeGroup = GameObject.FindGameObjectsWithTag("Boom");
        foreach (GameObject smoke in smokeGroup) {
            Destroy(smoke.gameObject);
        }
    }
    private IEnumerator spawnNewBird() {
        yield return new WaitForSeconds (3f);
        //Spawn new bird
        GameObject newBird = Instantiate(Resources.Load("Bird_Asset", typeof(GameObject))) as GameObject;

        //Make Bird Child ImageTarget
        newBird.transform.parent = GameObject.Find("ImageTarget").transform;

        //Scale Bird
        newBird.transform.localScale = new Vector3(10f,10f,10f);

        //Random Start Position
        Vector3 temp;
        temp.x = Random.Range(-4.8f/2, 4.8f/2);
        temp.y = Random.Range(1f/2, 5f/2);
        temp.z = Random.Range(-4.8f/2, 4.8f/2);
        newBird.transform.position = new Vector3(temp.x,temp.y,temp.z);
    }
}