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

public class touchVisualizer : MonoBehaviour
{
    public RectTransform debug_canvas;
    public RectTransform _rect;

    Dictionary<int, RectTransform> debug_touches = new Dictionary<int, RectTransform>();

    // Update is called once per frame
    void Update()
    {
        if (GetComponent<tuio_event>().VisualizeTouches)
            debug_canvas.GetComponent<CanvasGroup>().alpha = 1f;
        else
            debug_canvas.GetComponent<CanvasGroup>().alpha = 0f;

        var touches = TUIOManager.Instance.touches;
        foreach (var id in touches.Keys)
        {
            RectTransform tran = null;
            if (debug_touches.ContainsKey(id) == false)
            {
                GameObject t = Instantiate(_rect.gameObject, debug_canvas);
                float r = Random.Range(0.5f, 1f);
                float g = Random.Range(0.5f, 1f);
                float b = Random.Range(0.5f, 1f);
                t.GetComponent<RawImage>().color = new Color(r, g, b); 
                t.name = "debug" + id.ToString();
                tran = t.GetComponent<RectTransform>();
                debug_touches.Add(id, tran);
                tran.anchoredPosition = touches[id].position;
                //tran.position = touches[id].position;
            }
            else
            {
                tran = debug_touches[id];
                tran.anchoredPosition = touches[id].position;
            }
        }

        var removes = new HashSet<int>();
        foreach (var id in debug_touches.Keys)
        {
            if (touches.ContainsKey(id) == false) // remove
            {
                removes.Add(id);
            }
        }

        foreach (var id in removes)
        {
            debug_touches.Remove(id);
            Destroy(GameObject.Find("debug" + id.ToString()));
        }
    }
}