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

namespace JJServiceManager
{
    /// <summary>한 줄 입력 (글자 또는 비밀번호)</summary>
    public sealed class TextPrompt : Window
    {
        private readonly TextBox _text;
        private readonly PasswordBox _pw;
        private readonly bool _password;

        private TextPrompt(string title, string message, string initial, bool password, bool upper)
        {
            _password = password;
            Title = title + AppInstance.TitleTag;
            Width = 460;
            SizeToContent = SizeToContent.Height;
            ResizeMode = ResizeMode.NoResize;
            WindowStartupLocation = WindowStartupLocation.CenterOwner;
            ShowInTaskbar = false;
            FontFamily = new FontFamily("Malgun Gothic");
            FontSize = 13;
            AppIcon.Apply(this);

            var root = new StackPanel { Margin = new Thickness(18) };
            root.Children.Add(new TextBlock { Text = message, TextWrapping = TextWrapping.Wrap, Margin = new Thickness(0, 0, 0, 10) });
            if (password)
            {
                _pw = new PasswordBox { Height = 30, VerticalContentAlignment = VerticalAlignment.Center };
                root.Children.Add(_pw);
            }
            else
            {
                _text = new TextBox
                {
                    Height = 30,
                    VerticalContentAlignment = VerticalAlignment.Center,
                    Text = initial ?? "",
                    CharacterCasing = upper ? CharacterCasing.Upper : CharacterCasing.Normal,
                    FontFamily = upper ? new FontFamily("Consolas") : FontFamily,
                    FontWeight = upper ? FontWeights.Bold : FontWeights.Normal
                };
                root.Children.Add(_text);
            }
            var buttons = new StackPanel { Orientation = Orientation.Horizontal, HorizontalAlignment = HorizontalAlignment.Right, Margin = new Thickness(0, 14, 0, 0) };
            var ok = new Button { Content = "확인", MinWidth = 80, IsDefault = true, FontWeight = FontWeights.Bold };
            var cancel = new Button { Content = "취소", MinWidth = 80, IsCancel = true, Margin = new Thickness(6, 0, 0, 0) };
            ok.Click += (s, e) => DialogResult = true;
            buttons.Children.Add(ok);
            buttons.Children.Add(cancel);
            root.Children.Add(buttons);
            Content = root;
            Loaded += (s, e) =>
            {
                if (_pw != null) _pw.Focus();
                else { _text.Focus(); _text.SelectAll(); }
            };
        }

        private string Value => _password ? _pw.Password : _text.Text.Trim();

        /// <summary>입력값 (취소하면 null)</summary>
        public static string Ask(Window owner, string title, string message, string initial = "", bool password = false, bool upper = false)
        {
            var w = new TextPrompt(title, message, initial, password, upper);
            if (owner != null && owner.IsVisible) w.Owner = owner;
            return w.ShowDialog() == true ? w.Value : null;
        }
    }

    /// <summary>중계 서버 비밀번호 변경 (지금 비밀번호 + 새 비밀번호 두 번)</summary>
    public sealed class ChangePasswordWindow : Window
    {
        private readonly PasswordBox _old, _new1, _new2;
        private readonly TextBlock _msg;

        public string OldPassword => _old.Password;
        public string NewPassword => _new1.Password;

        private ChangePasswordWindow(string message, bool askOld)
        {
            Title = "중계 서버 비밀번호 변경" + AppInstance.TitleTag;
            Width = 440;
            SizeToContent = SizeToContent.Height;
            ResizeMode = ResizeMode.NoResize;
            WindowStartupLocation = WindowStartupLocation.CenterOwner;
            ShowInTaskbar = false;
            FontFamily = new FontFamily("Malgun Gothic");
            FontSize = 13;
            AppIcon.Apply(this);

            var root = new StackPanel { Margin = new Thickness(18) };
            root.Children.Add(new TextBlock { Text = message, TextWrapping = TextWrapping.Wrap, Margin = new Thickness(0, 0, 0, 10) });
            var grid = new Grid();
            grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(120) });
            grid.ColumnDefinitions.Add(new ColumnDefinition());
            _old = new PasswordBox { Height = 28, Margin = new Thickness(0, 3, 0, 3) };
            _new1 = new PasswordBox { Height = 28, Margin = new Thickness(0, 3, 0, 3) };
            _new2 = new PasswordBox { Height = 28, Margin = new Thickness(0, 3, 0, 3) };
            int row = 0;
            void Add(string label, Control c)
            {
                grid.RowDefinitions.Add(new RowDefinition { Height = GridLength.Auto });
                var t = new TextBlock { Text = label, VerticalAlignment = VerticalAlignment.Center };
                Grid.SetRow(t, row); Grid.SetRow(c, row); Grid.SetColumn(c, 1);
                grid.Children.Add(t); grid.Children.Add(c);
                row++;
            }
            if (askOld) Add("지금 비밀번호", _old);
            Add("새 비밀번호", _new1);
            Add("새 비밀번호 확인", _new2);
            root.Children.Add(grid);
            _msg = new TextBlock { Foreground = Brushes2.Stopped, Margin = new Thickness(0, 8, 0, 0), TextWrapping = TextWrapping.Wrap, Text = "8자 이상" };
            root.Children.Add(_msg);
            var buttons = new StackPanel { Orientation = Orientation.Horizontal, HorizontalAlignment = HorizontalAlignment.Right, Margin = new Thickness(0, 12, 0, 0) };
            var ok = new Button { Content = "변경", MinWidth = 80, IsDefault = true, FontWeight = FontWeights.Bold };
            var cancel = new Button { Content = "취소", MinWidth = 80, IsCancel = true, Margin = new Thickness(6, 0, 0, 0) };
            ok.Click += (s, e) =>
            {
                if (askOld && _old.Password.Length == 0) { _msg.Text = "지금 비밀번호를 입력하세요."; return; }
                if (_new1.Password.Length < 8) { _msg.Text = "새 비밀번호는 8자 이상이어야 합니다."; return; }
                if (_new1.Password != _new2.Password) { _msg.Text = "새 비밀번호와 확인이 다릅니다."; return; }
                if (askOld && _new1.Password == _old.Password) { _msg.Text = "지금과 다른 비밀번호를 입력하세요."; return; }
                DialogResult = true;
            };
            buttons.Children.Add(ok);
            buttons.Children.Add(cancel);
            root.Children.Add(buttons);
            Content = root;
            Loaded += (s, e) => (askOld ? _old : _new1).Focus();
        }

        /// <summary>(지금 비밀번호, 새 비밀번호) 또는 취소하면 null. askOld=false면 지금 비밀번호는 빈 값</summary>
        public static (string oldPw, string newPw)? Ask(Window owner, string message, bool askOld = true)
        {
            var w = new ChangePasswordWindow(message, askOld);
            if (owner != null && owner.IsVisible) w.Owner = owner;
            return w.ShowDialog() == true ? (w.OldPassword, w.NewPassword) : null;
        }
    }
}