using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
using BukkuBuddy.DTOs.SaveFile;
using BukkuBuddy.Services;
using RyzStudio.Windows.Forms;

namespace BukkuBuddy.Forms
{
    public class UpdateIconsForm : Form
    {
        private TProgressBar progressBar1;
        private RyzStudio.Windows.ThemedForms.ThUserControl userControl1;
        private Label label1;
        private Label label2;

        private readonly WebPageService _webPageService;

        private readonly BookmarkTreeView _treeView = null;
        private readonly bool _updateOnly;

        private bool cancelRequested = false;


        public UpdateIconsForm(BookmarkTreeView treeView, App6Options options, bool updateOnly)
        {
            InitializeComponent();

            UISetup.Dialog(this, true);

            this.Text = "Updating Icons";

            _treeView = treeView;
            _updateOnly = updateOnly;

            _webPageService = new WebPageService(options.AllowUnsafeSSL, options.Timeout, options.AllowCookies, options.AllowRedirects);
        }


        private void InitializeComponent()
        {
            progressBar1 = new TProgressBar();
            userControl1 = new RyzStudio.Windows.ThemedForms.ThUserControl();
            label1 = new Label();
            label2 = new Label();
            userControl1.SuspendLayout();
            SuspendLayout();
            //
            // progressBar1
            //
            progressBar1.BarColour = Color.FromArgb(25, 104, 218);
            progressBar1.Dock = DockStyle.Fill;
            progressBar1.EnableMovable = false;
            progressBar1.Location = new Point(3, 3);
            progressBar1.Maximum = 100;
            progressBar1.Minimum = 0;
            progressBar1.Name = "progressBar1";
            progressBar1.OnProgressChanged = null;
            progressBar1.ShowText = true;
            progressBar1.Size = new Size(418, 18);
            progressBar1.TabIndex = 156;
            progressBar1.Value = 25;
            //
            // userControl1
            //
            userControl1.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
            userControl1.BackColor = Color.Transparent;
            userControl1.Controls.Add(progressBar1);
            userControl1.EnableMovable = false;
            userControl1.Location = new Point(10, 64);
            userControl1.Name = "userControl1";
            userControl1.Size = new Size(424, 24);
            userControl1.TabIndex = 157;
            //
            // label1
            //
            label1.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
            label1.AutoEllipsis = true;
            label1.Location = new Point(10, 20);
            label1.Name = "label1";
            label1.Size = new Size(424, 15);
            label1.TabIndex = 159;
            //
            // label2
            //
            label2.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right;
            label2.AutoEllipsis = true;
            label2.Location = new Point(10, 40);
            label2.Name = "label2";
            label2.Size = new Size(424, 15);
            label2.TabIndex = 160;
            //
            // LoadIconsForm
            //
            BackColor = Color.White;
            ClientSize = new Size(444, 117);
            Controls.Add(label2);
            Controls.Add(label1);
            Controls.Add(userControl1);
            Name = "LoadIconsForm";
            Text = "Update Icons";
            userControl1.ResumeLayout(false);
            ResumeLayout(false);
        }

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

            await Task.Run(async () =>
            {
                this.Clear();

                var model = _treeView.ToNodeList<App6Options.Item>();

                // Update only
                if (_updateOnly)
                {
                    model = model.Where(x => x.Value.Icon == null)?.ToList() ?? new List<KeyValuePair<TreeNode, App6Options.Item>>();
                }

                // Update progress bars
                progressBar1.Maximum = model.Count;
                progressBar1.Value = 0;

                UIControl.SetText(label1, "Updating...");
                UIControl.SetText(label2, "");

                foreach (var item in model)
                {
                    if (cancelRequested)
                    {
                        break;
                    }

                    UIControl.SetText(label2, "... " + item.Value.Title);

                    progressBar1.Value++;

                    if (!_webPageService.IsValidUrl(item.Value.Address))
                    {
                        continue;
                    }

                    // Update only
                    if (_updateOnly)
                    {
                        if (item.Value.Icon != null)
                        {
                            continue;
                        }
                    }

                    var newModel = item.Value;

                    HtmlAgilityPack.HtmlDocument htmlDocument = null;

                    try
                    {
                        htmlDocument = await _webPageService.GetDocument(newModel.Address);
                    }
                    catch (Exception)
                    {
                        continue;
                    }

                    if (htmlDocument == null)
                    {
                        continue;
                    }

                    var faviconUrl = _webPageService.ParseFavicon(htmlDocument);
                    if (!string.IsNullOrWhiteSpace(faviconUrl))
                    {
                        var favicon = await _webPageService.GetImage(faviconUrl);
                        if (favicon != null)
                        {
                            if (favicon.Width > 16)
                            {
                                favicon = RyzStudio.Drawing.ImageEditor.Resize(favicon, 16, 16);
                            }
                        }

                        newModel.Icon = favicon;
                    }

                    _treeView.UpdateNode(item.Key, newModel);
                }

                UIControl.SetText(label1, "");
                UIControl.SetText(label2, "Done");
            });

            this.DialogResult = DialogResult.OK;
        }

        protected override void OnFormClosing(FormClosingEventArgs e)
        {
            base.OnFormClosing(e);

            if (this.DialogResult != DialogResult.OK)
            {
                e.Cancel = true;

                if (!cancelRequested)
                {
                    UIControl.SetText(label1, "Cancelling...");

                    cancelRequested = true;
                }
            }
        }


        public void Clear()
        {
            UIControl.SetText(label1, "Ready");
            UIControl.SetText(label2, "");

            progressBar1.Value = progressBar1.Maximum = 0;
        }

    }
}