using bzit.bomg.Models;
using ICSharpCode.SharpZipLib.Zip;
using Newtonsoft.Json;
using RyzStudio.Windows.Forms;
using RyzStudio.Windows.ThemedForms;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Xml;
using AppMode = bzit.bomg.MainForm.AppMode;
using Form = System.Windows.Forms.Form;

namespace bzit.bomg
{
    public partial class LoadBookmarksForm : Form
    {
        protected bool isBusy = false;
        protected bool requestCancel = false;

        protected MainForm parentForm = null;
        protected string sessionFilename = null;

        public LoadBookmarksForm(MainForm mainForm, string filename) : base()
        {
            InitializeComponent();

            parentForm = mainForm;
            sessionFilename = filename;

            this.StartPosition = FormStartPosition.WindowsDefaultLocation;
        }

        protected override void OnClosing(CancelEventArgs e)
        {
            base.OnClosing(e);

            if (this.IsBusy)
            {
                e.Cancel = true;
            }
        }

        protected async override void OnShown(EventArgs e)
        {
            base.OnShown(e);

            await loadFile(sessionFilename);

            this.Close();
        }

        protected bool IsBusy
        {
            get => isBusy;
            set
            {
                isBusy = value;
                parentForm.IsBusy = value;

                ThreadControl.SetImage(pictureBox1, (value) ? Properties.Resources.aniZomq2x32 : null);
                //ThreadControl.SetEnable(button2, !value);
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (this.IsBusy)
            {
                return;
            }

            this.Close();
        }

        protected async Task loadFile(string filename)
        {
            parentForm.ClearSession();
            parentForm.TreeView.Clear();
            parentForm.TreeView.HasChanged = false;

            if (string.IsNullOrWhiteSpace(filename))
            {
                return;
            }

            ThreadControl.SetValue(progressBar1, 0, 0);

            string password = string.Empty;

            if (RyzStudio.IO.SharpZipLib.IsZipEncrypted(filename))
            {
                TextBoxForm passwordForm = new TextBoxForm("Password", "Password", true);

                while (true)
                {
                    password = passwordForm.ShowDialog();
                    if (string.IsNullOrWhiteSpace(password))
                    {
                        break;
                    }

                    if (RyzStudio.IO.SharpZipLib.TestZipEncrypted(filename, password))
                    {
                        parentForm.SetSessionFile(filename, password);
                        break;
                    }
                }

                if (string.IsNullOrWhiteSpace(password))
                {
                    return;
                }
            }
            else
            {
                parentForm.SetSessionFile(filename, string.Empty);
            }

            this.IsBusy = true;

            string ext = Path.GetExtension(filename).Trim('.').ToLower();
            if (ext.Equals("jsnx"))
            {
                await loadJSNXBookmarkFile(filename, password);
            }
            else if (ext.Equals("ryz"))
            {
                await loadRYZBookmarkFile(filename, password);
            }
            else
            {
                // do nothing
            }

            this.IsBusy = false;
            parentForm.AllowSave = false;
            parentForm.TreeView.HasChanged = false;

            if (parentForm.TreeView.Nodes.Count > 0) parentForm.TreeView.Nodes[0].Expand();
        }

        protected async Task loadJSNXBookmarkFile(string filename, string password)
        {
            await Task.Run(() =>
            {
                int size = 2048;
                byte[] buffer = new byte[size];
                int bufferSize = 0;

                List<BookmarkItemViewModel> rs = null;

                ZipEntry readEntry = null;
                ZipInputStream readStream = new ZipInputStream(File.OpenRead(filename));
                readStream.Password = password;

                while (true)
                {
                    readEntry = readStream.GetNextEntry();
                    if (readEntry == null)
                    {
                        break;
                    }

                    if (string.IsNullOrWhiteSpace(readEntry.Name))
                    {
                        continue;
                    }

                    if (!readEntry.IsFile)
                    {
                        continue;
                    }

                    if (!readEntry.Name.Equals("bookmarks.json"))
                    {
                        continue;
                    }

                    MemoryStream ms = new MemoryStream();
                    buffer = new byte[size];
                    bufferSize = 0;

                    do
                    {
                        bufferSize = readStream.Read(buffer, 0, buffer.Length);
                        ms.Write(buffer, 0, bufferSize);
                    }
                    while (bufferSize > 0);

                    ms.Position = 0;

                    StreamReader sr = new StreamReader(ms);
                    rs = JsonConvert.DeserializeObject<List<BookmarkItemViewModel>>(sr.ReadToEnd());

                    break;
                }

                readStream.Flush();
                readStream.Close();
                readStream.Dispose();
                readStream = null;

                // load bookmark items
                ThreadControl.SetValue(progressBar1, 0, rs.Count);

                for (int i=0; i<rs.Count; i++)
                {
                    ThreadControl.SetValue(progressBar1, (i + 1));

                    parentForm.TreeView.AddItem(rs[i]);
                }

                parentForm.ApplicationMode = AppMode.Open;
            });
        }

        protected async Task loadRYZBookmarkFile(string filename, string password)
        {
            await Task.Run(() =>
            {
                int size = 2048;
                byte[] buffer = new byte[size];
                int bufferSize = 0;

                List<BookmarkItemViewModel> rs = new List<BookmarkItemViewModel>();

                ZipEntry readEntry = null;
                ZipInputStream readStream = new ZipInputStream(File.OpenRead(filename));
                readStream.Password = password;

                while (true)
                {
                    readEntry = readStream.GetNextEntry();
                    if (readEntry == null)
                    {
                        break;
                    }

                    if (string.IsNullOrWhiteSpace(readEntry.Name))
                    {
                        continue;
                    }

                    if (!readEntry.IsFile)
                    {
                        continue;
                    }

                    if (!readEntry.Name.Equals("bookmarks.xml"))
                    {
                        continue;
                    }

                    MemoryStream ms = new MemoryStream();
                    buffer = new byte[size];
                    bufferSize = 0;

                    do
                    {
                        bufferSize = readStream.Read(buffer, 0, buffer.Length);
                        ms.Write(buffer, 0, bufferSize);
                    }
                    while (bufferSize > 0);

                    ms.Position = 0;

                    // read stream
                    StreamReader sr = new StreamReader(ms);

                    // load xml
                    XmlDocument xmlDocument = new XmlDocument();
                    xmlDocument.LoadXml(sr.ReadToEnd());

                    // parse
                    XmlNode xnl = xmlDocument.SelectSingleNode("bomg/b/g");
                    if (xnl == null)
                    {
                        break;
                    }

                    string rootName = (xnl.Attributes["name"] == null) ? "Bookmarks" : (string.IsNullOrWhiteSpace(xnl.Attributes["name"].InnerText) ? "Bookmarks" : xnl.Attributes["name"].InnerText.Trim());

                    foreach (XmlNode xn in xnl.ChildNodes)
                    {
                        BookmarkItemViewModel viewModel = new BookmarkItemViewModel();

                        foreach (XmlNode xn2 in xn.ChildNodes)
                        {
                            switch (xn2.LocalName)
                            {
                                case "name":
                                    viewModel.SiteName = xn2.InnerText?.Trim();
                                    break;
                                case "address":
                                    viewModel.SiteAddress = xn2.InnerText?.Trim();
                                    break;
                                case "description":
                                    viewModel.SiteDescription = xn2.InnerText?.Trim();
                                    break;
                                //case "created":
                                //    bi.Created = xn2.InnerText?.Trim();
                                //    break;
                                default:
                                    break;
                            }
                        }

                        // fix fullpath and name
                        if (viewModel.SiteName.Contains("|"))
                        {
                            StringBuilder sb = new StringBuilder();
                            sb.Append("\\");
                            sb.Append(System.Web.HttpUtility.UrlEncode(rootName));
                            sb.Append("\\");

                            string[] pathParts = viewModel.SiteName.Split('|');
                            for (int i = 0; i < (pathParts.Length - 1); i++)
                            {
                                sb.Append(pathParts[i]);
                                //sb.Append(System.Web.HttpUtility.UrlDecode(pathParts[i]));
                                sb.Append("\\");
                            }

                            viewModel.SiteName = System.Web.HttpUtility.UrlDecode(pathParts[(pathParts.Length - 1)] ?? string.Empty);
                            viewModel.TreeviewPath = sb.ToString();
                        }
                        else
                        {
                            viewModel.SiteName = System.Web.HttpUtility.UrlDecode(viewModel.SiteName);
                            viewModel.TreeviewPath = string.Format("\\{0}\\", System.Web.HttpUtility.UrlEncode(rootName));
                        }

                        rs.Add(viewModel);
                    }

                    break;
                }

                readStream.Flush();
                readStream.Close();
                readStream.Dispose();
                readStream = null;

                // load bookmark items
                ThreadControl.SetValue(progressBar1, 0, rs.Count);

                for (int i = 0; i < rs.Count; i++)
                {
                    ThreadControl.SetValue(progressBar1, (i + 1));

                    parentForm.TreeView.AddItem(rs[i]);
                }

                parentForm.ClearSession();
                parentForm.ApplicationMode = AppMode.Open;
            });
        }

    }
}