using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;

namespace JJServiceManager
{
    /// <summary>설정 화면</summary>
    public sealed class SettingsWindow : Window
    {
        private readonly AppSettings _s;
        private readonly CheckBox _startup, _hotkey, _opLog, _shutdownButtons;
        private readonly TextBox _hotkeyBox;
        private readonly ComboBox _logMode, _esc;
        private ModifierKeys _mods;
        private Key _key;

        public SettingsWindow(AppSettings current)
        {
            _s = current;

            Title = "설정";
            Width = 640;
            SizeToContent = SizeToContent.Height;
            ResizeMode = ResizeMode.NoResize;
            FontFamily = new FontFamily("Malgun Gothic");
            FontSize = 13;
            Background = Brushes2.Make("#FAFAFA");
            WindowStartupLocation = WindowStartupLocation.CenterOwner;
            ShowInTaskbar = false;
            AppIcon.Apply(this);

            var root = XamlLoader.LoadElement("Settings.xaml");
            Content = root;

            _startup = root.Find<CheckBox>("chkStartup");
            _hotkey = root.Find<CheckBox>("chkHotkey");
            _opLog = root.Find<CheckBox>("chkOpLog");
            _shutdownButtons = root.Find<CheckBox>("chkShutdownButtons");
            _hotkeyBox = root.Find<TextBox>("txtHotkey");
            _logMode = root.Find<ComboBox>("cmbLogMode");
            _esc = root.Find<ComboBox>("cmbEsc");
            root.Find<TextBlock>("txtDataPath").Text = "설정 파일: " + SettingsStore.SettingsPath
                + "\n작업 로그 파일: " + OperationLogFile.Folder;

            // 현재 값 표시
            _startup.IsChecked = current.RunAtStartup;
            _hotkey.IsChecked = current.HotkeyEnabled;
            _opLog.IsChecked = current.ShowOperationLog;
            _shutdownButtons.IsChecked = current.ShowShutdownButtons;
            _logMode.SelectedIndex = (int)current.LogWindowMode;
            _esc.SelectedIndex = (int)current.EscAction;
            _mods = (ModifierKeys)current.HotkeyModifiers;
            _key = (Key)current.HotkeyKey;
            ShowHotkey();

            // 단축키: 클릭 후 직접 눌러서 지정
            _hotkeyBox.GotKeyboardFocus += (s, e) => _hotkeyBox.Background = Brushes2.Make("#FFF8E1");
            _hotkeyBox.LostKeyboardFocus += (s, e) => { _hotkeyBox.Background = Brushes2.Make("#FAFAFA"); ShowHotkey(); };
            _hotkeyBox.PreviewKeyDown += OnHotkeyKeyDown;

            root.Find<Button>("btnOk").Click += (s, e) => Save();
            root.Find<Button>("btnCancel").Click += (s, e) => Close();
            PreviewKeyDown += (s, e) =>
            {
                if (e.Key == Key.Escape && !_hotkeyBox.IsKeyboardFocused) Close();
            };
        }

        private void OnHotkeyKeyDown(object sender, KeyEventArgs e)
        {
            e.Handled = true;
            var key = e.Key == Key.System ? e.SystemKey : e.Key;
            var mods = Keyboard.Modifiers;
            if (Keyboard.IsKeyDown(Key.LWin) || Keyboard.IsKeyDown(Key.RWin)) mods |= ModifierKeys.Windows;

            // 보조키만 누른 상태: 진행 중 표시
            if (key is Key.LeftCtrl or Key.RightCtrl or Key.LeftAlt or Key.RightAlt
                or Key.LeftShift or Key.RightShift or Key.LWin or Key.RWin)
            {
                _hotkeyBox.Text = HotkeyManager.Format(mods, Key.None) + "…";
                return;
            }

            // Tab은 포커스 이동에 사용
            if (key == Key.Tab && mods == ModifierKeys.None)
            {
                e.Handled = false;
                return;
            }

            if ((mods & (ModifierKeys.Control | ModifierKeys.Alt | ModifierKeys.Windows)) == 0)
            {
                _hotkeyBox.Text = "Ctrl / Alt / Win 중 하나와 함께 누르세요";
                return;
            }

            _mods = mods;
            _key = key;
            ShowHotkey();
        }

        private void ShowHotkey() => _hotkeyBox.Text = HotkeyManager.Format(_mods, _key);

        private void Save()
        {
            _s.RunAtStartup = _startup.IsChecked == true;
            _s.HotkeyEnabled = _hotkey.IsChecked == true;
            _s.HotkeyModifiers = (int)_mods;
            _s.HotkeyKey = (int)_key;
            _s.ShowOperationLog = _opLog.IsChecked == true;
            _s.ShowShutdownButtons = _shutdownButtons.IsChecked == true;
            _s.LogWindowMode = (LogWindowMode)System.Math.Max(0, _logMode.SelectedIndex);
            _s.EscAction = (EscAction)System.Math.Max(0, _esc.SelectedIndex);
            DialogResult = true;
        }
    }
}