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

/// <summary>
/// 拼图控制
/// </summary>
public class move : MonoBehaviour
{
	//执行此选择
	bool isSelected;

	float distanceRay; //定位点击时计算
	GameObject piece; //分配点击时,将移动。
	Transform[] piecesMove;
	//[HideInInspector]
	//public float positionZ = -0.001f;
	[HideInInspector]
	public bool puzzlePlaying;
	Vector3 offset;
	GameObject lightC;
	public float positionX = 0f;
	public float positionY = 0f;
	public float positionZ = 0f;
	Vector3 positionL;
	//数字资源整合
	[Header("SFX")]
	public AudioSource clickSFX;

	private void Start()
    {
	}
    void Update()
	{
		//鼠标信息
		//按下鼠标
		if (Input.GetMouseButtonDown(0))
			{
				TouchClick();
			}
			//移动鼠标
			if (isSelected)
			{
				MovePiece();
			}
			//释放鼠标
			if (Input.GetMouseButtonUp(0))
			{
				FreePiece();
			}
	}

	/// <summary>
	/// 定位点击点
	/// </summary>
	void TouchClick()
	{
		Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);   //从相机到点的触控点
		RaycastHit hit;
		if (Physics.Raycast(ray, out hit))
		{                          //接收触控，如果有击中目标
			//print(hit.collider.gameObject.name);
            if (hit.collider.gameObject.tag == "shui")
            {
                distanceRay = hit.distance;
                piece = hit.collider.gameObject;
                offset = hit.point - hit.collider.gameObject.transform.position;
                isSelected = true;
            }
            else if(hit.collider.gameObject.transform.parent.name == "GrupoPiezas") {
				distanceRay = hit.distance;
				piece = hit.collider.gameObject.transform.parent.gameObject;
				offset = hit.point - hit.collider.gameObject.transform.parent.position;
				isSelected = true;
			}
        }
    }

	/// <summary>
	/// 移动碎片(每帧调用)
	/// </summary>
	void MovePiece()
	{
		Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
		Vector3 limitRay = ray.GetPoint(distanceRay);
		limitRay = new Vector3(limitRay.x, limitRay.y, limitRay.z);
		piece.transform.position = limitRay - offset;
	}

	/// <summary>
	/// 释放碎片
	/// </summary>
	void FreePiece()
	{
		if (isSelected) {
			lightC = GameObject.Find("light");
			positionL = lightC.transform.position;
			positionX = lightC.transform.position.x;
			positionY = lightC.transform.position.y;
			positionZ = lightC.transform.position.z;
			//piece.transform.position = new Vector3(piece.transform.position.x, piece.transform.position.y, piece.transform.position.z);
			if (piece.name == "screan") {
				if (
					(positionX - piece.transform.position.x < 0.5f && positionX - piece.transform.position.x > -0.5f) &&
					(positionY - piece.transform.position.y < -0.5f && positionY - piece.transform.position.y > -1.5f) &&
					(positionZ - piece.transform.position.z < 0.65f && positionZ - piece.transform.position.z > -0.35f)
					) 
				{
					piece.transform.SetParent(lightC.transform.parent);
					piece.transform.position = new Vector3(positionX, positionY + 1.05f, positionZ -  0.15f);
					clickSFX.Play();
					piece.tag = piece.name;
				}
			}
			if (piece.name == "ai")
			{
				if (
					(positionX - piece.transform.position.x < 0.5f && positionX - piece.transform.position.x > -0.5f) &&
					(positionY - piece.transform.position.y < -0.5f && positionY - piece.transform.position.y > -1.5f) &&
					(positionZ - piece.transform.position.z < 0.35f && positionZ - piece.transform.position.z > -0.65f)
					)
				{
					piece.transform.SetParent(lightC.transform.parent);
					piece.transform.position = new Vector3(positionX, positionY + 1.05f, positionZ + 0.15f);
					clickSFX.Play();
					piece.tag = piece.name;
				}
			}
			if (piece.name == "tou")
			{
				if (
					(positionX - piece.transform.position.x < 0.5f && positionX - piece.transform.position.x > -0.5f) &&
					(positionY - piece.transform.position.y < 2.3f && positionY - piece.transform.position.y > 1.3f) &&
					(positionZ - piece.transform.position.z < 0.6f && positionZ - piece.transform.position.z > -0.4f)
					)
				{
					piece.transform.SetParent(lightC.transform.parent);
					piece.transform.position = new Vector3(positionX, positionY - 1.8f, positionZ - 0.1f);
					clickSFX.Play();
					piece.tag = piece.name;
				}
			}
			isSelected = false;
		}
	}
}