using System;
using System.Drawing;
using System.Threading.Tasks;
using System.Windows.Forms;
using StarfaceOutlookSync.Models;
using StarfaceOutlookSync.Services;

namespace StarfaceOutlookSync.UI
{
    public class SyncProgressForm : Form
    {
        private readonly SyncProfile _profile;
        private readonly SyncEngine _engine = new SyncEngine();
        private TextBox _txtLog;
        private ProgressBar _progressBar;
        private Button _btnClose, _btnStart;
        private Label _lblResult;

        public SyncProgressForm(SyncProfile profile)
        {
            _profile = profile;
            InitializeComponent();
        }

        private void InitializeComponent()
        {
            Text = $"Synchronisation - {_profile.Name}";
            Size = new Size(500, 400);
            FormBorderStyle = FormBorderStyle.FixedDialog;
            MaximizeBox = false;
            MinimizeBox = false;
            StartPosition = FormStartPosition.CenterParent;
            Font = new Font("Segoe UI", 9);

            var infoLabel = new Label
            {
                Text = $"{_profile.StarfaceConnection.Host} ({_profile.StarfaceAddressBook.Name}) <-> {_profile.OutlookFolderName}",
                Left = 12, Top = 12, Width = 460, AutoSize = false, Height = 20
            };

            _progressBar = new ProgressBar
            {
                Left = 12, Top = 38, Width = 460, Height = 22,
                Style = ProgressBarStyle.Blocks,
                Value = 0
            };

            _txtLog = new TextBox
            {
                Left = 12, Top = 68, Width = 460, Height = 200,
                Multiline = true, ReadOnly = true, ScrollBars = ScrollBars.Vertical,
                BackColor = Color.FromArgb(30, 30, 30), ForeColor = Color.FromArgb(212, 212, 212),
                Font = new Font("Consolas", 9)
            };

            _lblResult = new Label
            {
                Left = 12, Top = 276, Width = 460, Height = 40,
                AutoSize = false, ForeColor = Color.Gray
            };

            _btnStart = new Button
            {
                Text = "Synchronisation starten", Left = 12, Top = 322, Width = 180, Height = 30
            };
            _btnStart.Click += async (s, e) => await RunSync();

            _btnClose = new Button
            {
                Text = "Schliessen", Left = 380, Top = 322, Width = 90, Height = 30,
                DialogResult = DialogResult.Cancel
            };

            Controls.AddRange(new Control[] { infoLabel, _progressBar, _txtLog, _lblResult, _btnStart, _btnClose });
            CancelButton = _btnClose;
        }

        private void AppendLog(string message)
        {
            if (InvokeRequired)
            {
                Invoke(new Action(() => AppendLog(message)));
                return;
            }
            _txtLog.AppendText($"[{DateTime.Now:HH:mm:ss}] {message}\r\n");
        }

        private async Task RunSync()
        {
            _btnStart.Enabled = false;
            _btnClose.Enabled = false;
            _progressBar.Style = ProgressBarStyle.Marquee;
            _lblResult.Text = "";

            _engine.OnProgress += AppendLog;

            try
            {
                var result = await Task.Run(() => _engine.SyncProfileAsync(_profile));

                _progressBar.Style = ProgressBarStyle.Blocks;
                _progressBar.Value = 100;

                var resultText = $"Erstellt: {result.Created}  |  Aktualisiert: {result.Updated}  |  Fehler: {result.Errors}";
                _lblResult.Text = resultText;
                _lblResult.ForeColor = result.Errors > 0 ? Color.OrangeRed : Color.Green;

                if (result.ErrorMessages.Count > 0)
                {
                    AppendLog("--- Fehler ---");
                    foreach (var err in result.ErrorMessages)
                        AppendLog(err);
                }
            }
            catch (Exception ex)
            {
                _lblResult.Text = $"Fehler: {ex.Message}";
                _lblResult.ForeColor = Color.Red;
                AppendLog($"FEHLER: {ex.Message}");
            }

            _engine.OnProgress -= AppendLog;
            _btnStart.Enabled = true;
            _btnStart.Text = "Erneut synchronisieren";
            _btnClose.Enabled = true;
        }
    }
}