using System.Windows;

namespace DrillTools
{
    /// <summary>
    /// 钻带涨缩参数设置窗口
    /// </summary>
    public partial class DrillScalingWindow : Window
    {
        private readonly DrillScalingViewModel _viewModel;

        /// <summary>
        /// 用户确认后的缩放结果。
        /// 保留模式与原始输入（用于系数记忆落盘），同时携带换算后的倍率（用于实际缩放）。
        /// </summary>
        public (ScalingMode Mode, string InputX, string InputY, double Kx, double Ky)? ScalingResult { get; private set; }

        public DrillScalingWindow()
        {
            InitializeComponent();
            _viewModel = new DrillScalingViewModel();
            DataContext = _viewModel;
        }

        private void ModeRadioButton_Changed(object sender, RoutedEventArgs e)
        {
            if (_viewModel == null)
                return;

            if (RatioRadioButton.IsChecked == true)
                _viewModel.Mode = ScalingMode.Ratio;
            else if (PpmRadioButton.IsChecked == true)
                _viewModel.Mode = ScalingMode.Ppm;
        }

        private void ExecuteButton_Click(object sender, RoutedEventArgs e)
        {
            var error = _viewModel.Validate();
            if (error != null)
            {
                ErrorText.Text = error;
                ErrorText.Visibility = Visibility.Visible;
                return;
            }

            ScalingResult = (_viewModel.Mode, _viewModel.InputX, _viewModel.InputY, _viewModel.Kx, _viewModel.Ky);
            DialogResult = true;
            Close();
        }

        /// <summary>
        /// 载入上次涨缩系数：实时读取 ini 并回填模式与输入框。
        /// RadioButton 与 Mode 为单向事件绑定，模式回填需手动同步 RadioButton 状态。
        /// </summary>
        private void LoadLastButton_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                var record = ScalingProfileStore.Load();
                if (record == null)
                {
                    System.Windows.MessageBox.Show("没有可载入的上次系数记录。", "载入上次系数",
                        MessageBoxButton.OK, MessageBoxImage.Information);
                    return;
                }

                // 先同步 RadioButton（设目标项为 true，靠同组互斥取消另一项，并触发 ModeRadioButton_Changed 联动 Mode 与派生标签），再回填输入框
                if (record.Mode == ScalingMode.Ratio)
                    RatioRadioButton.IsChecked = true;
                else
                    PpmRadioButton.IsChecked = true;
                _viewModel.InputX = record.InputX;
                _viewModel.InputY = record.InputY;
            }
            catch (Exception ex)
            {
                System.Windows.MessageBox.Show($"载入上次系数失败：\n{ex.Message}", "错误",
                    MessageBoxButton.OK, MessageBoxImage.Error);
            }
        }

        private void CancelButton_Click(object sender, RoutedEventArgs e)
        {
            ScalingResult = null;
            DialogResult = false;
            Close();
        }
    }
}