using o0;
using o0.Geometry2D.Float;
using o0.Project;
using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using ZIM;
using Color = UnityEngine.Color;

[RequireComponent(typeof(Canvas))]
public class ScreenLocate : MonoBehaviour
{
    enum Mode
    {
        InfraredLocate,
        ScreenMap,
        ScreenLocateManual
    }

    // 2个灯，顺序根据红外灯的大小 由大到小， 坐标通过 InfraredSpot.ScreenUV 和 InfraredSpot.CameraLocation 获得
    public InfraredSpot[] InfraredSpots { get; private set; }

    public ZIMWebCamera WebCamera;
    public Text Info;
    public List<RectTransform> CrosshairInCamera;
    public List<RectTransform> CrosshairInScreen;
    public RectTransform ScreenQuad;
    public Toggle SaveToggle;

    public bool ShowScreenQuad = false;

    public RawImage rawImage;
    public RawImage rawImage1;
    public RawImage rawImage2;
    public RawImage rawImage3;
    public RawImage rawImage4;
    public RawImage rawImage5;
    public RawImage FullScreenImage;

    public InfraredSpotSettings InfraredSpotSettings;

    public Texture2D DebugScreenImage;

    InfraredLocate infraredLocate;
    RectTransform canvas;
    Mode mode;
    List<Vector2> pointManual = new List<Vector2>();

    //o0.Project.WebCam o0WebCam = null;
    o0.Project.ScreenIdentification screenIdentification;

    static public ScreenLocate Main;

    static public List<RawImage> DebugImage = new List<RawImage>();
    static public RectTransform BackQuad = null;
    static public void DebugTexture(int index, Texture texture)
    {
        Destroy(DebugImage[index].texture);
        DebugImage[index].texture = texture;
    }
    static public void SetScreen(UnityEngine.Color? color = null)
    {
        if (BackQuad == null) 
        {
            var canvas = GameObject.Find("WebCameraView").GetComponent<RectTransform>();
            var background = canvas.Find("Background");
            BackQuad = background.GetChild(0).GetComponent<RectTransform>();
        }
        BackQuad.parent.gameObject.SetActive(color != null);
        BackQuad.GetComponent<RawImage>().color = color ?? Color.black;
    }
    static public void SetScreen(Rect rect, UnityEngine.Color? color = null)
    {
        if (BackQuad == null)
        {
            var canvas = GameObject.Find("WebCameraView").GetComponent<RectTransform>();
            var background = canvas.Find("Background");
            BackQuad = background.GetChild(0).GetComponent<RectTransform>();
        }
        BackQuad.parent.gameObject.SetActive(color != null);
        BackQuad.anchorMin = rect.min;
        BackQuad.anchorMax = rect.max;
        BackQuad.GetComponent<RawImage>().color = color ?? Color.black;
    }
    static void DebugBackQuad(Rect? rect = null)
    {
        if (BackQuad)
        {
            BackQuad.parent.GetComponent<RawImage>().enabled = false;
            BackQuad.GetComponent<RawImage>().color = Color.white;
            BackQuad.parent.gameObject.SetActive(!BackQuad.parent.gameObject.activeSelf);
            if (rect.HasValue)
            {
                BackQuad.anchorMin = rect.Value.min;
                BackQuad.anchorMax = rect.Value.max;
            }
        }
    }

    void Awake()
    {
        //var quad = new Quadrilateral(new Vector2(0, 0), new Vector2(89, 0), new Vector2(0, 95), new Vector2(100, 100));
        //var x = quad.InterpolationFactors(new Vector2(-1, -1));
        //Debug.Log(x);
    }

    void Start()
    {
        Main = this;

        DebugImage.Add(rawImage);
        DebugImage.Add(rawImage1);
        DebugImage.Add(rawImage2);
        DebugImage.Add(rawImage3);
        DebugImage.Add(rawImage4);
        DebugImage.Add(rawImage5);
        DebugImage.Add(FullScreenImage);

        if (WebCamera.webCamTexture)
            screenIdentification = new o0.Project.ScreenIdentification(WebCamera.webCamTexture);

        //crosshairInCamera = rawImage1.transform.GetChild(0).GetComponent<RectTransform>();
        canvas = transform.GetComponent<RectTransform>();

        mode = Mode.InfraredLocate;

        if (DebugScreenImage)
        {
            screenIdentification = new o0.Project.ScreenIdentification(new o0.Geometry2D.Vector<int>(DebugScreenImage.width, DebugScreenImage.height));
            screenIdentification.LocateScreen();
        }

        //screenIdentification = new o0.Project.ScreenIdentification(WebCamera.webCamTexture);
        //infraredLocate = new InfraredLocate(WebCamera, screenIdentification, InfraredSpotSettings);
    }


    void Update()
    {
        WebCamTexture texture = WebCamera?.webCamTexture;
        if (texture == null) return;

        if (screenIdentification == null)
            screenIdentification = new o0.Project.ScreenIdentification(WebCamera.webCamTexture);
        if (infraredLocate == null)
            infraredLocate = new InfraredLocate(WebCamera, screenIdentification, InfraredSpotSettings);
        if (mode == Mode.ScreenLocateManual)
        {
            //var newTex = WebCamera.webCamTexture.AutoLight(10);
            //DebugTexture(6, newTex);

            if (Input.GetMouseButtonDown(0))
            {
                var mouse = Input.mousePosition;
                var u = mouse.x / Screen.width;
                var v = mouse.y / Screen.height;
                //Debug.Log(u + ", " + v);
                u = Math.Clamp(u, 0, 1);
                v = Math.Clamp(v, 0, 1);

                pointManual.Add(new Vector2(u * WebCamera.width, v * WebCamera.height));
                var obj = Instantiate(Resources.Load("Point")) as GameObject;
                obj.transform.SetParent(FullScreenImage.transform);
                obj.transform.localPosition = new Vector2(u, v).pixelToLocalPosition_AnchorCenter(new Vector2(1, 1), FullScreenImage.rectTransform.rect);

                if (pointManual.Count == 1)
                    Info.text = "左键单击屏幕 右下角";
                else if (pointManual.Count == 2)
                    Info.text = "左键单击屏幕 右上角";
                else if (pointManual.Count == 3)
                    Info.text = "左键单击屏幕 左上角";
                else if (pointManual.Count == 4)
                {
                    screenIdentification.LocateScreenManual(new Quadrilateral(pointManual[0].o0Vector(), pointManual[1].o0Vector(), pointManual[3].o0Vector(), pointManual[2].o0Vector()));
                    pointManual.Clear();
                    ShowScreen(screenIdentification.Screen.Quad);
                    foreach (Transform i in FullScreenImage.transform)
                        Destroy(i.gameObject);
                    ToMode(Mode.InfraredLocate);
                }
            }
            return;
        }

        
        /* New*/
        if (texture.didUpdateThisFrame)     // 检查camera是否更新帧
        {
            if (!screenIdentification.Update(WebCamera.webCamTexture))    
            {
                var pixels = texture.GetPixels();       // 从左往右、从下往上
                if (mode == Mode.InfraredLocate)
                {
                    if (!screenIdentification.Screen.Active) 
                    {
                        var newTex = pixels.zimAutoLightSimple(texture.width, texture.height);
                        DebugTexture(1, newTex);
                    }
                    else
                    {
                        //var newTex = pixels.zimAutoLightSimple(texture.width, texture.height);
                        //DebugTexture(1, newTex);

                        // 成功定位屏幕后才做红外识别
                        InfraredSpots = infraredLocate.Update(pixels);
                        for (int i = 0; i < InfraredSpots.Length; i++)
                        {
                            if (InfraredSpots[i].CameraLocation != null)
                            {
                                // 检测到光点
                                var posInCanvas = InfraredSpots[i].CameraLocation.Value.pixelToLocalPosition_AnchorCenter(WebCamera.Size, rawImage.rectTransform.rect);
                                CrosshairInCamera[i].gameObject.SetActive(true);
                                CrosshairInCamera[i].anchoredPosition = posInCanvas;
                            }
                            else
                                CrosshairInCamera[i].gameObject.SetActive(false);
                        }
                    }
                }
                else if (mode == Mode.ScreenMap)
                {
                    InfraredSpots = infraredLocate.Update(pixels);
                    for (int i = 0; i < InfraredSpots.Length; i++)
                    {
                        if (InfraredSpots[i].ScreenUV != null)
                        {
                            // 检测到光点
                            var posInCanvas = InfraredSpots[i].ScreenUV.Value.pixelToLocalPosition_AnchorCenter(new Vector2(1, 1), canvas.rect);
                            CrosshairInScreen[i].gameObject.SetActive(true);
                            CrosshairInScreen[i].anchoredPosition = posInCanvas;
                        }
                        else
                            CrosshairInScreen[i].gameObject.SetActive(false);
                    }
                }
            }
        }
        /**/

        if (Input.GetKeyDown(KeyCode.Alpha1))
            BtnScreenLocate();
        if (Input.GetKeyDown(KeyCode.Alpha2))
            SetScreen(Color.white);
        if (Input.GetKeyDown(KeyCode.Alpha3))
            SetScreen(Color.black);
        if (Input.GetKeyDown(KeyCode.Alpha4))
            SetScreen(null);
        //if (Input.GetKeyDown(KeyCode.Alpha5))
        //    DebugScreen(new Quadrilateral(Vector2.zero, new Vector2(600,300), new Vector2(0, 0), new Vector2(1000, 700)));
        if (Input.GetKeyDown(KeyCode.Escape))
            ToMode(Mode.InfraredLocate);

        if (Input.GetKeyDown(KeyCode.Alpha8))
            DebugBackQuad();
        if (Input.GetKeyDown(KeyCode.Alpha9))
            DebugBackQuad(new Rect(0, 0, 1, 1));
        if (Input.GetKeyDown(KeyCode.Alpha0))
            ShowScreenQuad = true;

        /* Old 
        if (texture.didUpdateThisFrame)     // 检查camera是否更新帧
        {
            if (!o0InfraredIdentification2.Update(WebCamera.webCamTexture))
            {
                var pixels = texture.GetPixels();       // 从左往右、从下往上
                var infraredLocation = infraredLocate.Get(pixels);

                if (mode == Mode.InfraredLocate)
                {
                    //if (rawImage1.IsActive())
                    //{
                        //var newTex = WebCamera.webCamTexture.zimAutoLight();
                        //DebugTexture(1, newTex);
                    //}

                    int i = 0;
                    if (infraredLocation != null) 
                    {
                        for (; i < infraredLocation.Count; i++)
                        {
                            // 检测到光点
                            var posInCanvas = infraredLocation[i].pixelToLocalPosition_AnchorCenter(WebCamera.Size, rawImage.rectTransform.rect);
                            CrosshairInCamera[i].gameObject.SetActive(true);
                            CrosshairInCamera[i].anchoredPosition = posInCanvas;
                            //Debug.Log("location: " + posInCanvas);
                        }
                    }
                    for (; i < CrosshairInCamera.Count; i++)
                    {
                        CrosshairInCamera[i].gameObject.SetActive(false);
                    }

                }
                else if (mode == Mode.ScreenMap)
                {
                    int i = 0;
                    if (infraredLocation != null)
                    {
                        for (; i < infraredLocation.Count; i++)
                        {
                            var uv = o0InfraredIdentification2.Quad.InterpolationFactors(infraredLocation[i].o0Vector());
                            if (uv.x > 0 && uv.x < 1 && uv.y > 0 && uv.y < 1)
                            {
                                var posInScreen = uv.UnityVector().pixelToLocalPosition_AnchorCenter(new Vector2(1, 1), canvas.rect);
                                CrosshairInScreen[i].anchoredPosition = posInScreen;
                            }
                            CrosshairInScreen[i].gameObject.SetActive(true);
                        }
                    }
                    for (; i < CrosshairInScreen.Count; i++)
                    {
                        CrosshairInScreen[i].gameObject.SetActive(false);
                    }
                }
            }
        }
        /**/

    }

    public void BtnScreenLocate()
    {
        if (WebCamera?.webCamTexture)
            screenIdentification.LocateScreen();
    }

    public void BtnScreenMap()
    {
        if (WebCamera?.webCamTexture)
            ToMode(Mode.ScreenMap);
    }

    public void BtnScreenLocateManual()
    {
        if (WebCamera?.webCamTexture)
            ToMode(Mode.ScreenLocateManual);
    }

    // 标记屏幕的四个角
    public void ShowScreen(Quadrilateral quad)
    {
        if (quad == null) 
        {
            Info.text = "识别屏幕失败";
            return;
        }
        Info.text = "已识别到屏幕";

        if (ShowScreenQuad)
        {
            ScreenQuad.gameObject.SetActive(true);
            for (int i = 0; i < 4; i++)
            {
                RectTransform t = ScreenQuad.GetChild(i) as RectTransform;
                t.anchoredPosition = quad[i].UnityVector().pixelToLocalPosition_AnchorCenter(WebCamera.Size, ScreenQuad.rect);
            }
        }

    }

    void ToMode(Mode mode)
    {
        if (this.mode == mode)
            return;

        if (mode == Mode.ScreenMap)
        {
            if (!screenIdentification.Screen.Active)
            {
                Info.text = "先定位屏幕";
                return;
            }
            Info.text = "按ESC退出";
            SetScreen(Color.black);
            Info.transform.SetAsLastSibling();
            this.mode = Mode.ScreenMap;
        }
        else if (mode == Mode.InfraredLocate)
        {
            Info.text = screenIdentification.Screen.Active ? "已定位屏幕" : "定位屏幕失败";
            //Info.text = "已识别到屏幕"; 
            SetScreen(null);
            foreach (var i in CrosshairInScreen)
                i.gameObject.SetActive(false);
            FullScreenImage.gameObject.SetActive(false);
            Info.transform.SetSiblingIndex(transform.childCount - 4);
            this.mode = Mode.InfraredLocate;
            DebugTexture(1, null);    
        }
        else if (mode == Mode.ScreenLocateManual) 
        {
            Info.text = "左键单击屏幕 左下角";
            FullScreenImage.gameObject.SetActive(true);
            Info.transform.SetSiblingIndex(transform.childCount - 1);

            //var newTex = WebCamera.webCamTexture.AutoLight(10);
            var newTex = WebCamera.webCamTexture.zimAutoLightSimple();
            DebugTexture(6, newTex);
            this.mode = Mode.ScreenLocateManual;
        }
    }

}