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

[DisallowMultipleComponent]
[RequireComponent(typeof(Canvas))]
public class CanvasAddition : MonoBehaviour
{
    [SerializeField]
    Canvas m_Canvas;
    public Canvas canvas {
        get {
            return this.m_Canvas ?? (this.m_Canvas = this.GetComponent<Canvas>());
        }
    }

    [SerializeField]
    CullingFullScreenType m_Culling = CullingFullScreenType.None;

    Material m_SpriteGrayMaterial;
    public Material spriteGrayMaterial {
        get {
            return this.m_SpriteGrayMaterial ?? (this.m_SpriteGrayMaterial = MaterialUtility.GetInstantiatedSpriteGrayMaterial());
        }
    }

    private void Awake()
    {
        m_Canvas = this.GetComponent<Canvas>();

        WindowCenter.Instance.windowAfterOpenEvent += OnWindowOpen;
        WindowCenter.Instance.windowAfterCloseEvent += OnWindowClose;
    }

    private void OnDestroy()
    {
        WindowCenter.Instance.windowAfterOpenEvent -= OnWindowOpen;
        WindowCenter.Instance.windowAfterCloseEvent -= OnWindowClose;
    }

    private void OnWindowOpen(Window _window)
    {
        var culling = false;
        switch (m_Culling)
        {
            case CullingFullScreenType.None:
                culling = false;
                break;
            case CullingFullScreenType.Any:
                culling = WindowCenter.Instance.ExistAnyFullScreenOrMaskWin();
                break;
            default:
                culling = WindowCenter.Instance.ExistAnyFullScreenOrMaskWinLEqual((WindowType)m_Culling);
                break;
        }

        canvas.gameObject.SetLayer(culling ? LayerUtility.DevisableUI : LayerUtility.UILayer, false);
    }

    private void OnWindowClose(Window _window)
    {
        var culling = false;
        switch (m_Culling)
        {
            case CullingFullScreenType.None:
                culling = false;
                break;
            case CullingFullScreenType.Any:
                culling = WindowCenter.Instance.ExistAnyFullScreenOrMaskWin();
                break;
            default:
                culling = WindowCenter.Instance.ExistAnyFullScreenOrMaskWinLEqual((WindowType)m_Culling);
                break;
        }

        canvas.gameObject.SetLayer(culling ? LayerUtility.DevisableUI : LayerUtility.UILayer, false);
    }

    private void Start()
    {
        var canvasScaler = this.GetComponent<CanvasScaler>();
        if (canvasScaler != null && canvasScaler.screenMatchMode == CanvasScaler.ScreenMatchMode.MatchWidthOrHeight)
        {
            var screenAspect = Screen.width / (float)Screen.height;
            var referenceAspect = canvasScaler.referenceResolution.x / (float)canvasScaler.referenceResolution.y;

            if ((screenAspect - referenceAspect) > 0.0001f)
            {
                canvasScaler.matchWidthOrHeight = 1f;
            }
            else
            {
                canvasScaler.matchWidthOrHeight = 0f;
            }
        }

    }

    public enum CullingFullScreenType
    {
        Base = 0,
        Normal = 1,
        Modal = 2,
        Tip = 3,
        System = 4,
        Loading = 5,
        None = 6,
        Any = 7,
    }

}