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

public class RayController : MonoBehaviour
{
    public Transform anchor;
    public float maxDistance = 100;
    private LineRenderer lineRenderer;
    public AudioClip sound;
    private bool isRotating;
    public GameObject carBody;
    public Material[] bodyColor;
    public AudioClip sound2;
    private int currentNum = 0;
    public GameObject[] cars;

    void Start()
    {
        lineRenderer = GetComponent<LineRenderer>();
    }

    void Update()
    {
        if (OVRInput.GetDown(OVRInput.Button.Back))
        {
            if (lineRenderer.enabled)
            {
                lineRenderer.enabled = false;
            }
            else
            {
                lineRenderer.enabled = true;
            }
        }

        RaycastHit hit;
        Ray ray = new Ray(anchor.position, anchor.forward);
        lineRenderer.SetPosition(0, ray.origin);

        if (Physics.Raycast(ray, out hit, maxDistance))
        {
            lineRenderer.SetPosition(1, hit.point);
            GameObject target = hit.collider.gameObject;
            if (OVRInput.GetDown(OVRInput.Button.Back))
            {
                if (target.tag == "Block")
                {
                    target.transform.localScale = new Vector3(0.2f, 0.2f, 0.2f);
                    AudioSource.PlayClipAtPoint(sound, Camera.main.transform.position);
                }
                if (target.tag == "Car")
                {
                    if (!isRotating)
                    {
                        AudioSource.PlayClipAtPoint(sound, Camera.main.transform.position);
                        target.GetComponent<Rotate>().enabled = true;
                        isRotating = true;
                    }
                    else
                    {
                        AudioSource.PlayClipAtPoint(sound, Camera.main.transform.position);
                        target.GetComponent<Rotate>().enabled = false;
                        isRotating = false;
                    }
                }
            }

            if (OVRInput.GetDown(OVRInput.Button.PrimaryIndexTrigger))
            {
                if (target.tag == "Car")
                {
                    AudioSource.PlayClipAtPoint(sound2, Camera.main.transform.position);

                    // ①色を順繰りに変更する。
                    // 青 赤 黄 黒・・・＞以下繰り返し
                    var render = carBody.GetComponent<MeshRenderer>();
                    Material[] mats = render.materials;
                    currentNum = (currentNum + 1) % bodyColor.Length;
                    mats[2] = bodyColor[currentNum];
                    render.materials = mats;

                    // ②車種を順繰りに変更する。
                    currentNum = (currentNum + 1) % cars.Length;
                    for (int i = 0; i < cars.Length; i++)
                    {
                        if (i == currentNum)
                        {
                            cars[i].SetActive(true);
                        }
                        else
                        {
                            cars[i].SetActive(false);
                        }
                    }
                }
            }
        }
        else
        {
            lineRenderer.SetPosition(1, ray.origin + ray.direction * maxDistance);
        }
    }
}