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

public class cs01 : MonoBehaviour
{
    float v1 = 3f, v2 = 1;
    float rx, ry, rz = 0;
    int score = 0;
    public AudioClip au1;
    public Text t1;
    Vector3 vel;
    void Update()
    {

        //移動5步驟
        //1.vel.x, vel.y
        vel.x = Input.GetAxis("Horizontal") * v1;
        vel.z = Input.GetAxis("Vertical") * v1;
        //2.放開A,D，W，S
        if (Input.GetKeyDown(KeyCode.A) || Input.GetKeyDown(KeyCode.LeftArrow) || Input.GetKeyDown(KeyCode.D) || Input.GetKeyDown(KeyCode.RightArrow))
        {
            vel.x = 0;
        }
        if (Input.GetKeyDown(KeyCode.W) || Input.GetKeyDown(KeyCode.UpArrow) || Input.GetKeyDown(KeyCode.S) || Input.GetKeyDown(KeyCode.DownArrow))
        {
            vel.z = 0;
        }
        //3.space-jump-addforce
        if (Input.GetKeyDown(KeyCode.Space))
        {
            this.gameObject.GetComponent<Rigidbody>().AddForce(Vector3.up * 300);
        }
        //4.vel.y
        vel.y = this.gameObject.GetComponent<Rigidbody>().velocity.y;

        //5.物件坐標視角移動（達成space.self效果，以物件座標來前進）
        //5-1步驟1：計算局部坐標的合成向量
        //前進合成向量 movePos = 向量(x,y) = x向量  * 移動值    +    y向量 * 移動值
        //                    （錯誤）   =  Vector3.right* vel.x + Vector3.forward * vel.z
        //                    （正確）   =  transform.right * vel.x + transform.forward * vel.z;
        //Vector3 movePos = Vector3.right* vel.x + Vector3.forward * vel.z;
        Vector3 movePos = transform.right * vel.x + transform.forward * vel.z;
        //兩種單位向量：局部坐標向量  / 世界坐標向量
        //（1）局部（自身）座標，單位向量，只有座標軸的正方向沒有負方向
        //Transform.forward 向前
        //Transform.right 向右
        //Transform.up 向上
        //（2）世界座標，單位向量
        //Vector3.forward 向前
        //Vector3.back 向後
        //Vector3.left 向左
        //Vector3.right 向右

        //5-2步驟2：顯示局部坐標，(vel.x, vel.y, vel.z)
        vel.x = movePos.x;
        vel.z = movePos.z;
        //5-3步驟3：局部坐標設定剛體移動的velocity，(vel.x, vel.y, vel.z)
        this.gameObject.GetComponent<Rigidbody>().velocity = vel;

        //旋轉
        rx = 0;
        ry = Input.GetAxis("Rotate") * v2;
        rz = 0;
        this.transform.Rotate(rx, ry, rz, Space.Self);

    }
    //真實物體碰撞的物理效果：Collision
    //缺點：碰撞後，球會被撞而旋轉
    private void OnCollisionEnter(Collision collision)
    {
        if (collision.gameObject.name == "Cylinder1" || collision.gameObject.name == "Cylinder2")
        {
            //刪除被碰撞的物件
            Destroy(collision.gameObject);
            //播放音效
            this.gameObject.GetComponent<AudioSource>().Play();
            //顯示分數
            score += 5;
            t1.text = "分數：" + score.ToString();
            //若是100分，顯示過關
            if (score == 100)
            {
                this.gameObject.GetComponent<AudioSource>().clip = au1;
                this.gameObject.GetComponent<AudioSource>().Play();
                t1.text = "恭喜，過關";
            }

        }
    }
    //只是感應，而不真實碰撞：Trigger
    //優點：接觸後，球不會被撞而旋轉
    private void OnTriggerEnter(Collider other)
    {
        if (other.gameObject.name == "Cylinder3" || other.gameObject.name == "Cylinder4" || other.gameObject.name == "Cylinder5")
        {
            //刪除被碰撞的物件
            Destroy(other.gameObject);
            //播放音效
            this.gameObject.GetComponent<AudioSource>().Play();
            //顯示分數
            score += 30;
            t1.text = "分數：" + score.ToString();
            //若是100分，顯示過關
            if (score == 100)
            {
                this.gameObject.GetComponent<AudioSource>().clip = au1;
                this.gameObject.GetComponent<AudioSource>().Play();
                t1.text = "恭喜，過關";
            }

        }
    }
}