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

public class walk : MonoBehaviour
{
	private Camera cam;
    string output = "";
        // Start is called before the first frame update
        void Start()
        {
		cam = Camera.main;
        }

	Vector3 lastMouseCoordinate = Vector3.zero;
	public void Update() 
	{
	    //用滑鼠按下操控
	    if(Input.GetMouseButtonUp(0))
	    {
		//move 
		//transform.position = Vector3.Lerp(transform.position, transform.position+new Vector3(0, 0, 2), 0.3f);

	        Vector3 objectToscreenPos = cam.WorldToScreenPoint(transform.position);
		Debug.Log("objectToscreenPos=" + objectToscreenPos);
		Vector3 mouseToscreenPos = Input.mousePosition;
		mouseToscreenPos.z = 0;
		Debug.Log("mouseToscreenPos=" + mouseToscreenPos);

		Vector3 mouseDelta = mouseToscreenPos - objectToscreenPos;
	    	if(mouseDelta.y > 0)transform.position = Vector3.Lerp(transform.position, transform.position+new Vector3(0, 0, 2), 0.3f); 
	    	if(mouseDelta.y < 0)transform.position = Vector3.Lerp(transform.position, transform.position+new Vector3(0, 0, -2), 0.3f);
	    	if(mouseDelta.x > 0)transform.position = Vector3.Lerp(transform.position, transform.position+new Vector3(3, 0, 0), 0.3f);  
	    	if(mouseDelta.x < 0)transform.position = Vector3.Lerp(transform.position, transform.position+new Vector3(-3, 0, 0), 0.3f); 
	    }

	    //用鍵盤ws前後，ad左右操控
            if (Input.GetKeyDown (KeyCode.W)) 
            {  
                transform.position = Vector3.Lerp(transform.position, transform.position+new Vector3(0, 0, 2), 0.3f); 
            }  
            if (Input.GetKeyDown (KeyCode.S)) 
	    {  
               transform.position = Vector3.Lerp(transform.position, transform.position+new Vector3(0, 0, -2), 0.3f);  
            }  
            if (Input.GetKeyDown (KeyCode.A)) 
	    {  
                transform.position = Vector3.Lerp(transform.position, transform.position+new Vector3(-3, 0, 0), 0.3f); 
            }
            if (Input.GetKeyDown (KeyCode.D)) 
            {  
                transform.position = Vector3.Lerp(transform.position, transform.position+new Vector3(3, 0, 0), 0.3f);  
            }  
	    //用鍵盤↑↓←→上下左右鍵操控
   	    //if(Input.GetKey("up"))
   	    if(Input.GetKeyDown("up"))
            {  
                transform.position = Vector3.Lerp(transform.position, transform.position+new Vector3(0, 0, 2), 0.3f); 
 		//Debug.Log("Up Arrow key was pressed.");
            }
	    if(Input.GetKeyDown("down"))
	    {  
               transform.position = Vector3.Lerp(transform.position, transform.position+new Vector3(0, 0, -2), 0.3f);  
            } 
	    if(Input.GetKeyDown("left"))
	    {  
                transform.position = Vector3.Lerp(transform.position, transform.position+new Vector3(-3, 0, 0), 0.3f); 
            }
	    if(Input.GetKeyDown("right"))  
    	    {  
                transform.position = Vector3.Lerp(transform.position, transform.position+new Vector3(3, 0, 0), 0.3f);  
            }  

	}
    //void OnCollisionEnter(Collision other)
    void OnTriggerEnter  (Collider other)
    {
        if (other.tag == "final")
        {
            output = "恭喜，你已經成功過關。";
        }
        
    	if (other.tag == "car" || other.tag == "tree" )
        {
            //Debug.Log("car");
            output = "Game Over，遊戲結束";
        }
    }

    void OnGUI()
    {
        GUILayout.BeginHorizontal("box1");
            GUILayout.Label(output);
        GUILayout.EndHorizontal();
    }

}