using ComPDFKit.PDFAnnotation;
using ComPDFKitViewer;
using ComPDFKitViewer.AnnotEvent;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Media;

namespace PDF_Master.ViewModels.Tools.AnnotManager
{
    /// <summary>
    /// 注释面板与外部（如注释工具）关联
    /// </summary>
    public class AnnotTransfer
    {
        public event EventHandler<Dictionary<AnnotArgsType, object>> DataChanged;

        public event EventHandler<Dictionary<AnnotArgsType, object>> AnnotTypeChanged;

        public bool IsAddLink = false;
        public bool IsLocationLink = false;
        public AnnotAttribEvent AnnotEvent { get; set; }
        public List<AnnotAttribEvent> AnnotEvents = new List<AnnotAttribEvent>();

        public AnnotHandlerEventArgs annot;
        public List<AnnotHandlerEventArgs> annotlists;

        public Dictionary<AnnotArgsType, AnnotHandlerEventArgs> LastAnnotDict = new Dictionary<AnnotArgsType, AnnotHandlerEventArgs>();
        public AnnotHandlerEventArgs LastArrowAnnot = null;

        //是否为填写与签名的日期文本
        public bool IsTextFill { get; private set; }

        public void SetIsTextFill(bool isTextFill)
        {
            IsTextFill = isTextFill;
        }

        public bool IsMultiSelected
        { get { return (annotlists != null && annotlists.Count > 1); } }

        public AnnotTransfer()
        {
            LastAnnotDict.Add(AnnotArgsType.AnnotHighlight, null);
            LastAnnotDict.Add(AnnotArgsType.AnnotUnderline, null);
            LastAnnotDict.Add(AnnotArgsType.AnnotStrikeout, null);
            LastAnnotDict.Add(AnnotArgsType.AnnotFreehand, null);
            LastAnnotDict.Add(AnnotArgsType.AnnotFreeText, null);
            LastAnnotDict.Add(AnnotArgsType.AnnotSticky, null);
            LastAnnotDict.Add(AnnotArgsType.AnnotSquare, null);
            LastAnnotDict.Add(AnnotArgsType.AnnotCircle, null);
            LastAnnotDict.Add(AnnotArgsType.AnnotLine, null);
        }

        public void SaveLastAnnot()
        {
            if (annot == null)
            {
                return;
            }
            if (annot.EventType == AnnotArgsType.AnnotLine)
            {
                var lineAnnotArgs = annot as LineAnnotArgs;
                if (lineAnnotArgs.HeadLineType >= (C_LINE_TYPE)1 || lineAnnotArgs.TailLineType >= (C_LINE_TYPE)1)
                {
                    LastArrowAnnot = annot;
                    return;
                }
            }

            LastAnnotDict[annot.EventType] = annot;
        }

        #region 静态

        //是否为形状注释
        public static bool IsShapAnnot(AnnotHandlerEventArgs annot)
        {
            if (annot.EventType == AnnotArgsType.AnnotCircle ||
            annot.EventType == AnnotArgsType.AnnotSquare ||
            annot.EventType == AnnotArgsType.AnnotLine
            )
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        //是否为高亮注释
        public static bool IsHightAnnot(AnnotHandlerEventArgs annot)
        {
            if (annot.EventType == AnnotArgsType.AnnotUnderline ||
            annot.EventType == AnnotArgsType.AnnotSquiggly ||
            annot.EventType == AnnotArgsType.AnnotHighlight ||
            annot.EventType == AnnotArgsType.AnnotStrikeout
            )
            {
                return true;
            }
            else
            {
                return false;
            }
        }

        //判断注释列表是否有不同种类的注释
        public static bool IsDifferentTypeAnnots(List<AnnotHandlerEventArgs> annotlists)
        {
            //如高亮、下划线、删除线，是属于同一种类的注释
            bool isDifferentAnnotTyle = false;
            var annot = annotlists[0];
            var lastAnnot = annot;
            foreach (var item in annotlists)
            {
                if (lastAnnot.EventType != item.EventType)
                {
                    if ((AnnotTransfer.IsShapAnnot(annot) == true && AnnotTransfer.IsShapAnnot(item) == true) || (AnnotTransfer.IsHightAnnot(annot) == true && AnnotTransfer.IsHightAnnot(item) == true))
                    {
                        lastAnnot = item;
                        continue;
                    }

                    lastAnnot = item;
                    isDifferentAnnotTyle = true;
                    break;
                }
            }

            return isDifferentAnnotTyle;
        }

        //外部UI控件选中状态
        public static bool IsSolidStyle(DashStyle LineDash)
        {
            bool isSolid = true;
            if (LineDash == null || LineDash.Dashes.Count == 0)
            {
                return isSolid;
            }

            foreach (var item in LineDash.Dashes)
            {
                if (item > 0)
                {
                    isSolid = false;
                    break;
                }
            }
            return isSolid;
        }

        public static DashStyle GetLineDashStyle(bool isSolid)
        {
            DashStyle newDash = new DashStyle();
            if (isSolid == false)
            {
                newDash.Dashes.Add(2);
                newDash.Dashes.Add(2);
            }
            else
            {
                newDash = DashStyles.Solid;
            }

            return newDash;
        }

        #endregion 静态

        //单个属性更改
        public void UpdateAnnotAAttrib(AnnotAttrib annotAttrib, object obj)
        {
            if (annotlists != null && annotlists.Count > 1)
            {
                foreach (var itemevent in AnnotEvents)
                {
                    itemevent?.UpdateAttrib(annotAttrib, obj);
                    itemevent?.UpdateAnnot();
                }
            }
            else
            {
                AnnotEvent?.UpdateAttrib(annotAttrib, obj);
                AnnotEvent?.UpdateAnnot();
                //this.annot = AnnotEvent.AnnotItemsList[0];
            }
        }

        //多个属性更改
        public void UpdateAnnotAllAttribs(Dictionary<AnnotAttrib, object> AnnotAttribDir)
        {
            if (annotlists != null && annotlists.Count > 1)
            {
                foreach (var itemevent in AnnotEvents)
                {
                    foreach (var item in AnnotAttribDir)
                    {
                        itemevent?.UpdateAttrib(item.Key, item.Value);
                    }

                    itemevent?.UpdateAnnot();
                }
            }
            else
            {
                foreach (var item in AnnotAttribDir)
                {
                    AnnotEvent?.UpdateAttrib(item.Key, item.Value);
                }

                AnnotEvent?.UpdateAnnot();
                this.annot = AnnotEvent.AnnotItemsList[0];
            }
        }

        //是否为多选

        #region Invoke

        /// <summary>
        /// 更新多个属性，触发到工具栏注释工具，改变工具图标下的颜色值
        /// </summary>
        public void InvokeToMyTools(object sender, Dictionary<AnnotArgsType, object> keyValues)
        {
            DataChanged?.Invoke(sender, keyValues);
        }

        /// <summary>
        /// 更新单个属性
        /// </summary>
        public void InvokeToMyTools(AnnotArgsType argsType, object obj)
        {
            Dictionary<AnnotArgsType, object> changeData = new Dictionary<AnnotArgsType, object>();
            changeData[argsType] = obj;
            DataChanged?.Invoke(null, changeData);
        }

        //同一属性面板，切换注释工具
        public void AnnotTypeChangedInvoke(object sender, Dictionary<AnnotArgsType, object> keyValues)
        {
            AnnotTypeChanged?.Invoke(sender, keyValues);
        }

        #endregion Invoke
    }
}