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

public class Run : MonoBehaviour {
	Vector3 currentEulerAngles;

	private Rigidbody rb;
	public int iPushForce = 10;
	public bool bForward = false;
	public int iTurnForce = 10;
	public bool bTurnRight = false;
	public bool bTurnLeft = false;
	public int iTiltAngle = 30;
	public float fTilt = 0.0f;
	private bool bTiltLeft;
	private bool bTiltRight;

	// Use this for initialization
	void Start () {
		currentEulerAngles = transform.eulerAngles;
		rb = GetComponent<Rigidbody>();
	}
	
	// Update is called once per frame
	void Update () {
		//前進
		if (Input.GetKeyDown(KeyCode.UpArrow))
		{
			bForward = true;

		}
		if (Input.GetKeyUp(KeyCode.UpArrow))
		{
			bForward = false;
		}
		if (bForward)
		{
			rb.AddForce(transform.forward * iPushForce);
		}

		//左右灣及車身傾斜
		if (Input.GetKeyDown(KeyCode.RightArrow))
		{
			bTurnRight = true;
			bTiltRight = true;

		}
		if (Input.GetKeyUp(KeyCode.RightArrow))
		{
			bTurnRight = false;
			bTiltRight = false;
		}

		if (Input.GetKeyDown(KeyCode.LeftArrow))
		{
			bTurnLeft = true;
			bTiltLeft = true;
		}
		if (Input.GetKeyUp(KeyCode.LeftArrow))
		{
			bTurnLeft = false;
			bTiltLeft = false;
		}
		if (bTurnRight)
		{
			currentEulerAngles += new Vector3(0, iTurnForce * Time.deltaTime, 0);
		}
		if (bTurnLeft)
		{
			currentEulerAngles -= new Vector3(0, iTurnForce * Time.deltaTime, 0);
		}

		if (bTiltLeft || bTiltRight)
		{
			if (bTiltLeft)
			{
				if (fTilt <= iTiltAngle)
					fTilt += iTiltAngle * Time.deltaTime;
			}
			if (bTiltRight)
			{
				if (fTilt >= (-1) * iTiltAngle)
					fTilt -= iTiltAngle * Time.deltaTime;
			}
		}
		else
		{
			fTilt = Mathf.Lerp(fTilt, 0, Time.deltaTime);
		}
		currentEulerAngles.z = fTilt;
		transform.eulerAngles = currentEulerAngles;
	}
}