using System.Data;
using System.IO;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using Autodesk.Revit.DB;
using Autodesk.Revit.UI;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using HtmlAgilityPack;
using Microsoft.Win32;
using Nice3point.Revit.Toolkit.External.Handlers;


namespace ShrlAlgoToolkit.RevitAddins.RvMEP;

public partial class ClashReportViewModel(UIApplication uiapp) : ObservableObject
{
    [ObservableProperty]
    [NotifyCanExecuteChangedFor(nameof(RevitAddins.RvMEP.ClashReportViewModel.RefreshCommand))]
    public partial string FilePathName { get; set; }
    public UIApplication UiApp { get; set; } = uiapp;

    [ObservableProperty]
    public partial bool InCurrentView { get; set; } = true;

    [ObservableProperty]
    public partial bool IsSetSectionBox { get; set; }
    public DataTable DataSource { get; set; } = new DataTable();
    [ObservableProperty]
    public partial DataTable CurrentViewItems { get; set; } = new();

    [RelayCommand]
    private void LvScroll(ScrollViewer scrollViewer)
    {
        // ReSharper disable once CompareOfFloatsByEqualityOperator
        if (!isLoadingData && scrollViewer.VerticalOffset + scrollViewer.ViewportHeight == scrollViewer.ExtentHeight)//必须等于
        {
            LoadMoreData();
        }
    }

    private const int VbBatchSize = 20;
    private bool isLoadingData;
    private void LoadInitialData()
    {
        isLoadingData = true;
        CurrentViewItems.Clear();
        var size = VbBatchSize;
        if (DataSource.Rows.Count < VbBatchSize)
        {
            size = DataSource.Rows.Count;
        }
        for (var i = 0; i < size; i++)
        {
            CurrentViewItems.ImportRow(DataSource.Rows[i]);
        }

        //CurrentViewItems = CurrentViewItems;
        isLoadingData = false;
    }
    private void LoadMoreData()
    {
        isLoadingData = true;
        var startIndex = CurrentViewItems.Rows.Count;
        var end = startIndex + VbBatchSize;
        if (end > DataSource.Rows.Count)
        {
            end = DataSource.Rows.Count;
        }
        if (startIndex < end + 1)
        {
            for (var i = startIndex; i < end; i++)
            {
                CurrentViewItems.ImportRow(DataSource.Rows[i]);
            }
        }

        isLoadingData = false;
    }

    private void LoadHtmlTableData(string filePath)
    {
        var htmlContent = ReadLocalHtmlFile(filePath);
        DataSource = ParseHtmlToPairs(htmlContent);
        LoadInitialData();
    }
    //private async Task<string> GetHtmlContent(string url)
    //{
    //    try
    //    {
    //        using (HttpClient httpClient = new HttpClient())
    //        {
    //            HttpResponseMessage response = await httpClient.GetAsync(url);
    //            response.EnsureSuccessStatusCode();

    //            return await response.Content.ReadAsStringAsync();
    //        }
    //    }
    //    catch (Exception ex)
    //    {
    //        MessageBox.Show("Error while fetching HTML content: " + ex.ViewMessage);
    //        return null;
    //    }
    //}
    private DataTable ParseHtmlToPairs(string html)
    {
        DataTable dataTable = new();
        try
        {
            HtmlDocument doc = new();
            doc.LoadHtml(html);

            var tableNode = doc.DocumentNode.SelectSingleNode("//table");

            if (tableNode != null)
            {
                var rows = tableNode.SelectNodes("tr");
                for (var i = 0; i < rows.Count; i++)
                {
                    if (i == 0)
                    {
                        var row = rows[i].SelectNodes("td");
                        foreach (var cell in row)
                        {
                            dataTable.Columns.Add(cell.InnerText == string.Empty ? WebUtility.HtmlDecode("序号") : WebUtility.HtmlDecode(cell.InnerText.Trim()));

                            CurrentViewItems = dataTable.Copy();
                        }
                    }
                    else
                    {
                        var dataRow = dataTable.NewRow();
                        var columnIndex = 0;
                        foreach (var cell in rows[i].SelectNodes("td"))
                        {
                            dataRow[columnIndex] = WebUtility.HtmlDecode(cell.InnerText.Trim());
                            columnIndex++;
                        }
                        dataTable.Rows.Add(dataRow);
                    }
                }
            }
            else
            {
                MessageBox.Show("html中未发现表格。");
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show("解析html表格数据时出错：" + ex.Message);
            return null;
        }

        return dataTable;
    }
    private string ReadLocalHtmlFile(string filePath)
    {
        try
        {
            return File.ReadAllText(filePath);
        }
        catch (Exception ex)
        {
            MessageBox.Show("读取本地html文件时出错：" + ex.Message);
            return null;
        }
    }
    private readonly ActionEventHandler handler = new();

    [RelayCommand]
    private void Location(object obj)
    {
        var rowView = obj as DataRowView;
        var dr = rowView?.Row;
        var uidoc = UiApp.ActiveUIDocument;
        var doc = uidoc.Document;
        var ids = GetElementIds(dr);
        uidoc.Selection.SetElementIds(ids);
        var view = doc.ActiveView;
        if (!ids.Any())
        {
            return;
        }
        if (view is View3D view3D)
        {
            handler.Raise(_ => doc.Invoke(ts =>
            {
                if (IsSetSectionBox)
                {
                    view = view3D.SectionBoxElements(ids, InCurrentView);
                    ts.Commit();
                    if (UiApp.ActiveUIDocument.ActiveView.Id != view.Id)
                    {
                        UiApp.ActiveUIDocument.ActiveView = view;
                    }
                    //var box = elem.get_BoundingBox(UiDocument.ActiveGraphicalView);

                    var box = view3D.GetSectionBox();

                    var uiView = uidoc.GetOpenUIViews().FirstOrDefault(v => v.ViewId == uidoc.ActiveGraphicalView.Id);
                    uiView.ZoomAndCenterRectangle(box.Min, box.Max);
                }
                else
                {
                    view.ZoomElement(uidoc, ids.FirstOrDefault());
                }

            }, "定位碰撞元素"));



        }
        //RevitCommandId revitCommandId = RevitCommandId.LookupPostableCommandId(PostableCommand.SelectionBox);
        //try
        //{
        //    uiapp.PostCommand(revitCommandId);
        //}
        //catch (Exception)
        //{

        //    throw;
        //}
        //RevitCommandId.LookupCommandId()
        //List<ElementId> ids = GetElementIds(dr);
        //ElementId id = null;
        //if (uiapp.ActiveUIDocument.Document.GetElement(ids[0]).IsValidObject)
        //{
        //    id = ids[0];
        //}
        //else
        //{
        //    ids.Remove(ids[0]);
        //    if (uiapp.ActiveUIDocument.Document.GetElement(ids[1]).IsValidObject)
        //    {
        //        id = ids[1];
        //    }
        //    else
        //    {
        //        ids.Remove(ids[1]);
        //    }
        //}
        //if (id != null)
        //{
        //    uiapp.ActiveUIDocument.ShowElements(id);
        //}

        //var index = str.IndexOf("ID ");
        //var elementId1 = str.Substring(index,)
    }
    /// <summary>
    /// 获取当前文档的有效元素ID
    /// </summary>
    /// <param name="dr"></param>
    /// <returns></returns>
    private List<ElementId> GetElementIds(DataRow dr)
    {
        var list = new List<ElementId>();
        var str = dr[1].ToString();
        var idStr = str.Split(' ').Last();
#if REVIT2018 || REVIT2020
        var id = new ElementId(int.Parse(idStr));
#elif REVIT2025
        var id = new ElementId(long.Parse(idStr));
#endif
        var str1 = dr[2].ToString();
        var idStr1 = str1.Split(' ').Last();
#if REVIT2018 || REVIT2020
        var id1 = new ElementId(int.Parse(idStr1));
#elif REVIT2025
        var id1 = new ElementId(long.Parse(idStr1));
#endif
        var e = UiApp.ActiveUIDocument.Document.GetElement(id);
        var e1 = UiApp.ActiveUIDocument.Document.GetElement(id1);
        if (e is { IsValidObject: true } && !e.Document.IsLinked)
        {
            list.Add(id);
        }
        if (e1 is { IsValidObject: true } && !e1.Document.IsLinked)
        {
            list.Add(id1);
        }
        return list;
    }
    [RelayCommand(CanExecute = nameof(CanRefresh))]
    private void Refresh()
    {
        CurrentViewItems.Clear();
        LoadHtmlTableData(FilePathName);
    }

    private bool CanRefresh => !string.IsNullOrEmpty(FilePathName);
    [RelayCommand]
    private void OpenFile()
    {
        var fileOpenDialog = new OpenFileDialog()
        {
            Filter = "Html文件 (*.html)|*.html",
            Multiselect = false,
        };
        if (fileOpenDialog.ShowDialog() == true)
        {
            FilePathName = fileOpenDialog.FileName;
            LoadHtmlTableData(FilePathName);
        }
    }
}