using PaintDotNet.SystemLayer;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Imaging;
using System.Reflection;
using System.Threading;
using System.Windows.Forms;

namespace PaintDotNet
{
    /// <summary>
    /// 抽出来在图像拼接弹窗里面使用
    /// </summary>
    internal class DocumentStitchWindow : DocumentStitchView
    {
        private ZoomBasis zoomBasis;

        protected override void OnLayout(LayoutEventArgs e)
        {
            if (this.zoomBasis == ZoomBasis.FitToWindow)
            {
                ZoomToPreviewWindow();
                // This bizarre ordering of setting PanelAutoScroll prevents some very weird layout/scroll-without-scrollbars stuff.
                PanelAutoScroll = true;
                PanelAutoScroll = false;
            }
            base.OnLayout(e);
        }

        protected override void OnResize(EventArgs e)
        {
            if (this.zoomBasis == ZoomBasis.FitToWindow)
            {
                PerformLayout();
            }

            base.OnResize(e);
        }

        public DocumentStitchWindow()
        {
            this.InitToolsAndManager();

            InitializeComponent();

            this.zoomBasis = ZoomBasis.FitToWindow;

            InitializeBottomEvent();

            this.MouseEvent_Del(null, null);
        }

        private void InitializeComponent()
        {

        }

        protected override void Dispose(bool disposing)
        {
            base.Dispose(disposing);
        }

        public override void ZoomIn()
        {
            this.ZoomBasis = ZoomBasis.ScaleFactor;
            base.ZoomIn();
        }

        public override void ZoomIn(double factor)
        {
            this.ZoomBasis = ZoomBasis.ScaleFactor;
            base.ZoomIn(factor);
        }

        public override void ZoomOut()
        {
            this.ZoomBasis = ZoomBasis.ScaleFactor;
            base.ZoomOut();
        }

        public override void ZoomOut(double factor)
        {
            this.ZoomBasis = ZoomBasis.ScaleFactor;
            base.ZoomOut(factor);
        }

        public event EventHandler ZoomBasisChanging;
        protected virtual void OnZoomBasisChanging()
        {
            if (ZoomBasisChanging != null)
            {
                ZoomBasisChanging(this, EventArgs.Empty);
            }
        }

        public event EventHandler ZoomBasisChanged;
        protected virtual void OnZoomBasisChanged()
        {
            if (ZoomBasisChanged != null)
            {
                ZoomBasisChanged(this, EventArgs.Empty);
            }
        }
        //public int OffsetH
        //{
        //    set
        //    {
        //        this.panel.AutoScrollPosition.X = value;
        //    }
        //}

        /// <summary>
        /// 持有mat的有效区域
        /// </summary>
        public OpenCvSharp.Mat StitchMat
        {
            get
            {
                if (this.StitchDocument == null || this.StitchDocument.surface == null) return null;
                return this.StitchDocument.surface.StitchMat;
            }
        }

        /// <summary>
        /// 持有mat的绘制区域
        /// </summary>
        public Rectangle StitchBounds
        {
            get
            {
                return this.StitchDocument.surface.stitchBounds;
            }
            set
            {
                this.StitchDocument.surface.stitchBounds = value;
            }
        }

        /// <summary>
        /// 持有mat的绘制区域
        /// </summary>
        public int StitchWidth
        {
            get
            {
                return this.StitchDocument.surface.StitchWidth;
            }
        }

        /// <summary>
        /// 持有mat的绘制区域
        /// </summary>
        public int StitchHeight
        {
            get
            {
                return this.StitchDocument.surface.StitchHeight;
            }
        }

        /// <summary>
        /// 合适大小
        /// </summary>
        public void ZoomToPreviewWindow()
        {
            if (this.StitchDocument != null)
            {
                Rectangle max = ClientRectangleMax;

                ScaleFactor zoom = ScaleFactor.Min(max.Width - 10,
                                                   this.StitchBounds.Width,
                                                   max.Height - 10,
                                                   this.StitchBounds.Height,
                                                   ScaleFactor.MinValue);

                ScaleFactor min = ScaleFactor.Min(zoom, ScaleFactor.OneToOne);
                this.ScaleFactor = min;
            }
        }

        public ZoomBasis ZoomBasis
        {
            get
            {
                return this.zoomBasis;
            }

            set
            {
                if (this.zoomBasis != value)
                {
                    OnZoomBasisChanging();
                    this.zoomBasis = value;
                    //this.panel.AutoScrollOffset
                    switch (this.zoomBasis)
                    {
                        case ZoomBasis.FitToWindow:
                            ZoomToPreviewWindow();

                            //// Enable PanelAutoScroll only long enough to recenter the view
                            //PanelAutoScroll = true;
                            //PanelAutoScroll = false;

                            // this would be unset by the scalefactor changes in ZoomToWindow
                            this.zoomBasis = ZoomBasis.FitToWindow;
                            break;

                        case ZoomBasis.ScaleFactor:
                            //PanelAutoScroll = true;
                            break;

                        default:
                            throw new InvalidEnumArgumentException();
                    }

                    OnZoomBasisChanged();
                }
            }
        }

        protected override void HandleMouseWheel(Control sender, MouseEventArgs e)
        {
            if (Control.ModifierKeys == Keys.Control && !disableWheel && this.compositionSurface != null)
            {
                double mouseDelta = (double)e.Delta / 120.0f;
                Rectangle visibleDocBoundsStart = this.VisibleDocumentBounds;
                System.Drawing.Point mouseDocPt = this.MouseToDocument(sender, new System.Drawing.Point(e.X, e.Y));
                RectangleF visibleDocDocRect1 = this.VisibleDocumentRectangleF;

                PointF mouseNPt = new PointF(
                    (mouseDocPt.X - visibleDocDocRect1.X) / visibleDocDocRect1.Width,
                    (mouseDocPt.Y - visibleDocDocRect1.Y) / visibleDocDocRect1.Height);

                Rectangle rc = this.PanelClientRectangle;
                int width = this.SurfaceScrollableWidth;
                int height = this.SurfaceScrollableHeight;

                //获取鼠标在图像中的坐标定位
                double originX = 0.5;
                double originY = 0.5;
                double ptxInDoc = mouseDocPt.X * this.ScaleRatio;
                double ptyInDoc = mouseDocPt.Y * this.ScaleRatio;
                if (rc.Width < width)
                {
                    originX = (ptxInDoc + this.PanelScrollPosition.X - 0.0) / width;
                }
                if (rc.Height < height)
                {
                    originY = (ptyInDoc + this.PanelScrollPosition.Y - 0.0) / height;
                }

                const double factor = 1.12;
                double mouseFactor = Math.Pow(factor, Math.Abs(mouseDelta));

                if (e.Delta > 0)
                {
                    this.ZoomIn(mouseFactor);
                }
                else if (e.Delta < 0)
                {
                    this.ZoomOut(mouseFactor);
                }

                RectangleF visibleDocDocRect2 = this.VisibleDocumentRectangleF;

                PointF scrollPt2 = new PointF(
                    mouseDocPt.X - visibleDocDocRect2.Width * mouseNPt.X,
                    mouseDocPt.Y - visibleDocDocRect2.Height * mouseNPt.Y);

                this.DocumentScrollPositionF = scrollPt2;

                int width2 = this.SurfaceScrollableWidth;
                int height2 = this.SurfaceScrollableHeight;

                if ((rc.Width < width2 || rc.Height < height2) && (rc.Width < width || rc.Height < height))
                {
                    //根据鼠标在图像中的坐标重新定位放大后的图像
                    this.PanelScrollPosition = new System.Drawing.Point(
                        (int)(width2 * originX - ptxInDoc + 0),
                        (int)(height2 * originY - ptyInDoc + 0));
                }
                else if (rc.Width < width2 || rc.Height < height2)
                {
                    this.PanelScrollPosition = new System.Drawing.Point((int)(width2 - rc.Width) / 2 + 0, (int)(height2 - rc.Height) / 2 + 0);
                }
                else
                {
                    this.PanelScrollPosition = new System.Drawing.Point((int)(width2 - rc.Width) / 2 + 0, (int)(height2 - rc.Height) / 2 + 0);
                }

                Rectangle visibleDocBoundsEnd = this.VisibleDocumentBounds;

                if (visibleDocBoundsEnd != visibleDocBoundsStart)
                {
                    // Make sure the screen updates, otherwise it can get a little funky looking
                    this.Update();
                }
            }

            base.HandleMouseWheel(sender, e);
        }

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);
        }

        public event EventHandler ActiveLayerChanged;
        protected void OnLayerChanged()
        {
            this.Focus();

            if (ActiveLayerChanged != null)
            {
                ActiveLayerChanged(this, EventArgs.Empty);
            }
        }

        /// <summary>
        /// 初始化底部按钮的各种事件
        /// </summary>
        private void InitializeBottomEvent()
        {
            /*//缩小按钮
            this.PanelBottom.zoomOutButton.Click += new EventHandler(ZoomOutButton_Click);
            //放大按钮
            this.PanelBottom.zoomInButton.Click += new EventHandler(zoomInButton_Click);*/
        }

        private void ZoomOutButton_Click(object sender, EventArgs e)
        {
            this.ZoomOut();
        }

        private void zoomInButton_Click(object sender, EventArgs e)
        {
            this.ZoomIn();
        }


        public event EventHandler ToolChanging;
        protected void OnToolChanging()
        {
            if (ToolChanging != null)
            {
                ToolChanging(this, EventArgs.Empty);
            }
        }

        public event EventHandler ToolChanged;
        protected void OnToolChanged()
        {
            if (ToolChanged != null)
            {
                ToolChanged(this, EventArgs.Empty);
            }
        }

        /// <summary>
        /// Updates any pertinent EXIF tags, such as "Creation Software", to be
        /// relevant or up-to-date.
        /// </summary>
        /// <param name="document"></param>
        private void UpdateExifTags(StitchDocument document)
        {
            PropertyItem pi = Exif.CreateAscii(ExifTagID.Software, PdnInfo.GetProductName(false));
            document.Metadata.ReplaceExifValues(ExifTagID.Software, new PropertyItem[1] { pi });
        }

        private sealed class OurProgressEvents : IFileTransferProgressEvents
        {
            private TransferProgressDialog progressDialog;
            private ICancelable cancelSink;
            private int itemCount = 0;
            private int itemOrdinal = 0;
            private string itemName = string.Empty;
            private long totalWork;
            private long totalProgress;
            private const int maxPBValue = 200; // granularity of progress bar. 100 means 1%, 200 means 0.5%, etc.
            private bool cancelRequested = false;

            private ManualResetEvent operationEnded = new ManualResetEvent(false);

            public OurProgressEvents()
            {
            }

            [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Maintainability", "CA1500:VariableNamesShouldNotMatchFieldNames", MessageId = "cancelSink")]
            public void BeginOperation(IWin32Window owner, EventHandler callWhenUIShown, ICancelable cancelSink)
            {
                if (this.progressDialog != null)
                {
                    throw new InvalidOperationException("Operation already in progress");
                }

                this.progressDialog = new TransferProgressDialog();
                this.progressDialog.Text = PdnResources.GetString("ShowFileDialog.TransferProgress.Title");
                this.progressDialog.Icon = Utility.ImageToIcon(PdnResources.GetImageResource("Icons.MenuFileOpenIcon.png").Reference);
                this.progressDialog.Title = PdnResources.GetString("ShowFileDialog.ItemText.Initializing");
                this.progressDialog.ProgressBar.Style = ProgressBarStyle.Marquee;
                this.progressDialog.ProgressBar.Maximum = maxPBValue;

                this.progressDialog.CancelClicked +=
                    delegate (object sender, EventArgs e)
                    {
                        this.cancelRequested = true;
                        this.cancelSink.RequestCancel();
                        UpdateUI();
                    };

                EventHandler progressDialog_Shown =
                    delegate (object sender, EventArgs e)
                    {
                        callWhenUIShown(this, EventArgs.Empty);
                    };

                this.cancelSink = cancelSink;
                this.itemOrdinal = 0;
                this.cancelRequested = false;
                this.itemName = string.Empty;
                this.itemCount = 0;
                this.itemOrdinal = 0;
                this.totalProgress = 0;
                this.totalWork = 0;

                this.progressDialog.Shown += progressDialog_Shown;
                this.progressDialog.ShowDialog(owner);
                this.progressDialog.Shown -= progressDialog_Shown;

                this.progressDialog.Dispose();
                this.progressDialog = null;
                this.cancelSink = null;
            }

            [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Maintainability", "CA1500:VariableNamesShouldNotMatchFieldNames", MessageId = "itemCount")]
            public void SetItemCount(int itemCount)
            {
                if (this.progressDialog.InvokeRequired)
                {
                    this.progressDialog.BeginInvoke(new Procedure<int>(SetItemCount), new object[] { itemCount });
                }
                else
                {
                    this.itemCount = itemCount;
                    UpdateUI();
                }
            }

            [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Maintainability", "CA1500:VariableNamesShouldNotMatchFieldNames", MessageId = "itemOrdinal")]
            public void SetItemOrdinal(int itemOrdinal)
            {
                if (this.progressDialog.InvokeRequired)
                {
                    this.progressDialog.BeginInvoke(new Procedure<int>(SetItemOrdinal), new object[] { itemOrdinal });
                }
                else
                {
                    this.itemOrdinal = itemOrdinal;
                    this.totalWork = 0;
                    this.totalProgress = 0;
                    UpdateUI();
                }
            }

            public void SetItemInfo(string itemInfo)
            {
                if (this.progressDialog.InvokeRequired)
                {
                    this.progressDialog.BeginInvoke(new Procedure<string>(SetItemInfo), new object[] { itemInfo });
                }
                else
                {
                    this.itemName = itemInfo;
                    UpdateUI();
                }
            }

            public void BeginItem()
            {
                if (this.progressDialog.InvokeRequired)
                {
                    this.progressDialog.BeginInvoke(new Procedure(BeginItem), null);
                }
                else
                {
                    this.progressDialog.ProgressBar.Style = ProgressBarStyle.Continuous;
                }
            }

            [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Maintainability", "CA1500:VariableNamesShouldNotMatchFieldNames", MessageId = "totalWork")]
            public void SetItemWorkTotal(long totalWork)
            {
                if (this.progressDialog.InvokeRequired)
                {
                    this.progressDialog.BeginInvoke(new Procedure<long>(SetItemWorkTotal), new object[] { totalWork });
                }
                else
                {
                    this.totalWork = totalWork;
                    UpdateUI();
                }
            }

            [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Maintainability", "CA1500:VariableNamesShouldNotMatchFieldNames", MessageId = "totalProgress")]
            public void SetItemWorkProgress(long totalProgress)
            {
                if (this.progressDialog.InvokeRequired)
                {
                    this.progressDialog.BeginInvoke(new Procedure<long>(SetItemWorkProgress), new object[] { totalProgress });
                }
                else
                {
                    this.totalProgress = totalProgress;
                    UpdateUI();
                }
            }

            public void EndItem(WorkItemResult result)
            {
                if (this.progressDialog.InvokeRequired)
                {
                    this.progressDialog.BeginInvoke(new Procedure<WorkItemResult>(EndItem), new object[] { result });
                }
                else
                {
                }
            }

            public void EndOperation(OperationResult result)
            {
                if (this.progressDialog.InvokeRequired)
                {
                    this.progressDialog.BeginInvoke(new Procedure<OperationResult>(EndOperation), new object[] { result });
                }
                else
                {
                    this.progressDialog.Close();
                }
            }

            public WorkItemFailureAction ReportItemFailure(Exception ex)
            {
                if (this.progressDialog.InvokeRequired)
                {
                    object result = this.progressDialog.Invoke(
                        new Function<WorkItemFailureAction, Exception>(ReportItemFailure),
                        new object[] { ex });

                    return (WorkItemFailureAction)result;
                }
                else
                {
                    WorkItemFailureAction result;
                    result = ShowFileTransferFailedDialog(ex);
                    return result;
                }
            }

            private WorkItemFailureAction ShowFileTransferFailedDialog(Exception ex)
            {
                WorkItemFailureAction result;
                Icon formIcon = this.progressDialog.Icon;

                string formTitle = PdnResources.GetString("ShowFileDialog.ItemFailureDialog.Title");

                Image taskImage = PdnResources.GetImageResource("Icons.WarningIcon.png").Reference;

                string introTextFormat = PdnResources.GetString("ShowFileDialog.ItemFailureDialog.IntroText.Format");
                string introText = string.Format(introTextFormat, ex.Message);

                TaskButton retryTB = new TaskButton(
                    PdnResources.GetImageResource("Icons.MenuImageRotate90CWIcon.png").Reference,
                    PdnResources.GetString("ShowFileDialog.RetryTB.ActionText"),
                    PdnResources.GetString("ShowFileDialog.RetryTB.ExplanationText"));

                TaskButton skipTB = new TaskButton(
                    PdnResources.GetImageResource("Icons.HistoryFastForwardIcon.png").Reference,
                    PdnResources.GetString("ShowFileDialog.SkipTB.ActionText"),
                    PdnResources.GetString("ShowFileDialog.SkipTB.ExplanationText"));

                TaskButton cancelTB = new TaskButton(
                    PdnResources.GetImageResource("Icons.CancelIcon.png").Reference,
                    PdnResources.GetString("ShowFileDialog.CancelTB.ActionText"),
                    PdnResources.GetString("ShowFileDialog.CancelTB.ExplanationText"));

                List<TaskButton> taskButtons = new List<TaskButton>();
                taskButtons.Add(retryTB);

                // Only have the Skip button if there is more than 1 item being transferred.
                // If only 1 item is begin transferred, Skip and Cancel are essentially synonymous.
                if (this.itemCount > 1)
                {
                    taskButtons.Add(skipTB);
                }

                taskButtons.Add(cancelTB);

                int width96 = (TaskDialog.DefaultPixelWidth96Dpi * 4) / 3; // 33% wider

                TaskButton clickedTB = TaskDialog.Show(
                    this.progressDialog,
                    formIcon,
                    formTitle,
                    taskImage,
                    true,
                    introText,
                    taskButtons.ToArray(),
                    retryTB,
                    cancelTB,
                    width96,
                    false,
                    0,
                    out bool unuse);

                if (clickedTB == retryTB)
                {
                    result = WorkItemFailureAction.RetryItem;
                }
                else if (clickedTB == skipTB)
                {
                    result = WorkItemFailureAction.SkipItem;
                }
                else
                {
                    result = WorkItemFailureAction.CancelOperation;
                }

                return result;
            }

            private void UpdateUI()
            {
                int itemCount2 = Math.Max(1, this.itemCount);

                double startValue = (double)this.itemOrdinal / (double)itemCount2;
                double endValue = (double)(this.itemOrdinal + 1) / (double)itemCount2;

                long totalWork2 = Math.Max(1, this.totalWork);
                double lerp = (double)this.totalProgress / (double)totalWork2;

                double newValue = Utility.Lerp(startValue, endValue, lerp);
                int newValueInt = (int)Math.Ceiling(maxPBValue * newValue);

                if (this.cancelRequested)
                {
                    this.progressDialog.CancelEnabled = false;
                    this.progressDialog.Title = PdnResources.GetString("ShowFileDialog.ItemText.Canceling");
                    this.progressDialog.ProcessMsg = string.Empty;
                    this.progressDialog.ProgressBar.Style = ProgressBarStyle.Marquee;
                }
                else
                {
                    this.progressDialog.CancelEnabled = true;
                    this.progressDialog.Title = this.itemName;
                    string progressFormat = PdnResources.GetString("ShowFileDialog.ProgressText.Format");
                    string progressText = string.Format(progressFormat, this.itemOrdinal + 1, this.itemCount);
                    this.progressDialog.ProcessMsg = progressText;
                    this.progressDialog.ProgressBar.Style = ProgressBarStyle.Continuous;
                    this.progressDialog.ProgressBar.Value = newValueInt;
                }
            }
        }

        /// <summary>
        /// 分栏显示禁止滚动改变图片大小
        /// </summary>
        bool disableWheel = false;
        DateTime _time;
        protected override void MouseEvent_Move(object sender, MouseEventArgs e)
        {
            if (this.compositionSurface != null)
            {
                if ((DateTime.Now - _time).TotalMilliseconds > 20)
                {
                    _time = DateTime.Now;
                    base.MouseEvent_Move(sender, e);
                }
            }
        }
        protected override void MouseEvent_Down(object sender, MouseEventArgs e)
        {
            if (tools != null)
            {
                //tools[activeTool].OnMouseDown(this, e);
                tools[_activeTool].InvokeMember("OnMouseDown",
                              BindingFlags.Public |
                              BindingFlags.Static |
                              BindingFlags.InvokeMethod,
                              null,
                              null,
                              new object[2] { this, e });
            }
        }
    }
}