using UnityEngine;
using System.Collections;
using UnityEngine.UI;
using UnityStandardAssets.CrossPlatformInput;
using UnityEngine.SceneManagement;

public class TankMovement : MonoBehaviour {
	
	public float moveSpeed;
	public float turnSpeed;
	public float boostSpeed;
	private Rigidbody rb;
	private float movementInputValue;
	private float turnInputValue;
	private int boostCount = 5;
	private Text boostLabel;

	void Awake(){
		rb = GetComponent<Rigidbody> ();
	}

	void Start(){
		boostLabel = GameObject.Find ("Boost").GetComponent<Text> ();
		boostLabel.text = "Boost: " + boostCount;
	}

	/*void Update() {
		//movementInputValue = Input.GetAxis("Vertical");
		//turnInputValue = Input.GetAxis("Horizontal");

		if(Input.GetButtonDown("Boost")){
				if(boostCount <= 0) return;
			rb.velocity = transform.forward * boostSpeed;
				boostCount -= 1;
				boostLabel.text = "Boost: " + boostCount;
		}
	}*/

	public void OnBoostButtonClicked(){
		if (boostCount < 1)
			return;
		rb.velocity = transform.forward * boostSpeed;
		boostCount -= 1;
		boostLabel.text = "Boost: " + boostCount;
	}	

	void FixedUpdate(){
		movementInputValue = CrossPlatformInputManager.GetAxisRaw("Vertical");
		turnInputValue = CrossPlatformInputManager.GetAxisRaw ("Horizontal");

		Move();
		Turn();
	}

	void Move(){
		Vector3 movement = transform.forward * movementInputValue * moveSpeed * Time.deltaTime;
		rb.MovePosition (rb.position + movement);
	}

	void Turn(){
		float turn = turnInputValue * turnSpeed * Time.deltaTime;
		Quaternion turnRotation = Quaternion.Euler (0f, turn, 0f);
		rb.MoveRotation (rb.rotation * turnRotation);
	}

	public void AddBoost(int amount){
		boostCount += amount;
		boostLabel.text = "Boost: " + boostCount;
	}
		
	// ★追加
	void OnCollisionEnter(Collision other){
		if(other.gameObject.CompareTag("MoveFloor")){

			// ぶつかった相手を親にセットする。
			transform.SetParent(other.transform);
		}
	}

	// ★追加
	void OnCollisionExit(Collision other){
		if(other.gameObject.CompareTag("MoveFloor")){

			// 親子関係を解除する。
			// 「null」は「空っぽ（中身がない）」という意味
			transform.SetParent(null);
		}
	}
}