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

public class walk : MonoBehaviour
{
	public GUISkin customSkin;
	public Texture TextureScore;
	int mScore = 0;
	private Camera cam;
    string output = "";
    bool isMoving = true;
    // 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(isMoving == true)
        {
            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);
			mScore ++;
		}
                if (mouseDelta.y < 0) 
		{
			transform.position = Vector3.Lerp(transform.position, transform.position + new Vector3(0, 0, -2), 0.3f);
			mScore --;
		}
                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);
		mScore ++;
            }
            if (Input.GetKeyDown(KeyCode.S))
            {
                transform.position = Vector3.Lerp(transform.position, transform.position + new Vector3(0, 0, -2), 0.3f);
		mScore --;
            }
            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.GetKeyDown("up"))
            {
                transform.position = Vector3.Lerp(transform.position, transform.position + new Vector3(0, 0, 2), 0.3f);
		mScore ++;
            }
            if (Input.GetKeyDown("down"))
            {
                transform.position = Vector3.Lerp(transform.position, transform.position + new Vector3(0, 0, -2), 0.3f);
		mScore --;
            }
            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 OnTriggerEnter  (Collider other)
    {
        if (other.tag == "final")
        {
            output = "恭喜，你已經成功過關。";
            isMoving = false;
        }

        if (other.tag == "car" || other.tag == "tree")
        {
            output = "Game Over，遊戲結束";
            isMoving = false;
        }
    }
    void OnGUI()
    {
	GUI.skin = customSkin;
	GUI.Label(new Rect( 80, 25, 100, 60 ), "score : ");
	GUI.Label(new Rect( Screen.width-35, 25, 100, 60 ), mScore.ToString() );
	GUI.DrawTexture(new Rect(10, 10, 60, 60), TextureScore , ScaleMode.ScaleToFit, true, 1.0F);
	int buttonWidth = 200;
	int buttonHeight = 50;		
	int buttonX = (Screen.width - buttonWidth ) / 2;
	int buttonY = (Screen.height - buttonHeight ) / 2;
	if(isMoving==false)
	{
		if ( GUI.Button(new Rect( buttonX, buttonY, buttonWidth, buttonHeight ), "Game Over,Try again?" ) )
		{
			UnityEngine.SceneManagement.SceneManager.LoadScene(0);
		}
	}
    }
}