using System;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Windows.Forms;
using StarfaceOutlookSync.Models;
using StarfaceOutlookSync.Services;

namespace StarfaceOutlookSync.UI
{
    /// <summary>Zeigt das Sync-Protokoll an (read-only) mit Aktualisieren/Leeren.</summary>
    public class LogViewerForm : Form
    {
        private TextBox _txt;
        private Button _btnClose;
        private Panel _panel;

        public LogViewerForm()
        {
            Text = "Protokoll";
            Size = new Size(720, 500);
            StartPosition = FormStartPosition.CenterParent;
            Font = new Font("Segoe UI", 9);

            _txt = new TextBox
            {
                Multiline = true,
                ReadOnly = true,
                ScrollBars = ScrollBars.Both,
                WordWrap = false,
                Dock = DockStyle.Fill,
                BackColor = Color.White,
                Font = new Font("Consolas", 9)
            };

            _panel = new Panel { Dock = DockStyle.Bottom, Height = 44 };

            var btnRefresh = new Button { Text = "Aktualisieren", Left = 10, Top = 8, Width = 100, Height = 28 };
            btnRefresh.Click += (s, e) => LoadLog();

            var btnClear = new Button { Text = "Leeren", Left = 118, Top = 8, Width = 80, Height = 28 };
            btnClear.Click += (s, e) =>
            {
                if (MessageBox.Show("Protokoll wirklich leeren?", "Protokoll",
                        MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
                {
                    Logger.Clear();
                    LoadLog();
                }
            };

            var btnFolder = new Button { Text = "Ordner oeffnen", Left = 206, Top = 8, Width = 120, Height = 28 };
            btnFolder.Click += (s, e) => OpenFolder();

            _btnClose = new Button
            {
                Text = "Schliessen", Top = 8, Width = 100, Height = 28,
                Anchor = AnchorStyles.Top | AnchorStyles.Right
            };
            _btnClose.Click += (s, e) => Close();

            _panel.Controls.AddRange(new Control[] { btnRefresh, btnClear, btnFolder, _btnClose });

            Controls.Add(_txt);
            Controls.Add(_panel);

            Load += (s, e) =>
            {
                _btnClose.Left = _panel.ClientSize.Width - _btnClose.Width - 10;
                LoadLog();
            };
        }

        private void LoadLog()
        {
            Logger.PruneOlderThan(UserSettings.Load().LogRetentionDays);
            _txt.Text = Logger.ReadAll();
            _txt.SelectionStart = _txt.TextLength;
            _txt.ScrollToCaret();
        }

        private void OpenFolder()
        {
            try
            {
                var dir = Path.GetDirectoryName(Logger.LogFilePath);
                Process.Start(new ProcessStartInfo { FileName = dir, UseShellExecute = true });
            }
            catch { }
        }
    }
}