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

namespace UltraCombos
{
    public class InputVisualizer : MaskableGraphic
    //event system visualizer
    {
        [SerializeField]
        Texture m_texture;

        //event camera

        public override Texture mainTexture
        {
            get
            {
                return m_texture == null ? s_WhiteTexture : m_texture;
            }
        }

        void Update()
        {
            if (EventSystem.current == null || EventSystem.current.currentInputModule == null)
                return;

            BaseInput input = EventSystem.current.currentInputModule.input;

            pointers2.Clear();
            if (input.GetMouseButton(0))
            {
                pointers2.Add(input.mousePosition);
            }

            for (int i = 0; i < input.touchCount; i++)
            {
                Touch t = input.GetTouch(i);
                pointers2.Add(t.position);
            }
            SetVerticesDirty();
        }

        public void Toggle()
        {
            enabled = !enabled;
        }

        public void Toggle2()
        {
            enabled = !enabled;
        }

        UIVertex[] CreateQuad(Vector2[] _vertices, Vector2[] _uvs)
        {
            if (_vertices.Length == 4 && _uvs.Length == 4)
            {
                UIVertex[] _quad = new UIVertex[4];
                for (var i = 0; i < _quad.Length; i++)
                {
                    var _vert = UIVertex.simpleVert;
                    _vert.color = Color.white;
                    _vert.position = _vertices[i];
                    _vert.uv0 = _uvs[i];
                    _quad[i] = _vert;
                }
                return _quad;
            }
            else
                return null;
        }

        void AddPoint(VertexHelper vh, Vector2 position)
        {
            Rect r = new Rect(0, 0, 100 / transform.localScale.x, 100 / transform.localScale.y);
            r.center = position;
            // Debug.Log(position);
            r.center -= new Vector2(1630, 800 / 2);

            vh.AddUIVertexQuad(CreateQuad(new[] {
                Rect.NormalizedToPoint(r, _uv0),
                Rect.NormalizedToPoint(r, _uv1),
                Rect.NormalizedToPoint(r, _uv2),
                Rect.NormalizedToPoint(r, _uv3),
            }, new[] { _uv0, _uv1, _uv2, _uv3 }));
        }

        Vector2 _uv0 = new Vector2(0, 0);
        Vector2 _uv1 = new Vector2(0, 1);
        Vector2 _uv2 = new Vector2(1, 1);
        Vector2 _uv3 = new Vector2(1, 0);

        private HashSet<Vector2> pointers2 = new HashSet<Vector2>();
        protected override void OnPopulateMesh(VertexHelper vh)
        {
            vh.Clear();
            foreach (var point in pointers2)
                AddPoint(vh, point);
        }
    }
}