initial commit

ViewModels/DfiManageViewModel.cs

@@ -0,0 +1,178 @@
+using System;
+using System.Threading.Tasks;
+using System.Windows;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using HC_APTBS.Services;
+
+namespace HC_APTBS.ViewModels
+{
+    /// <summary>
+    /// ViewModel for the DFIManageDisplay user control.
+    ///
+    /// <para>
+    /// Exposes the current DFI (injection timing offset) value, a slider for manual
+    /// adjustment, KWP version selection, and commands to read and write DFI via K-Line.
+    /// Auto-mode is respected by the bench service when executing a DFI test phase.
+    /// </para>
+    /// </summary>
+    public sealed partial class DfiManageViewModel : ObservableObject
+    {
+        // ── Services ──────────────────────────────────────────────────────────────
+
+        private readonly IKwpService _kwp;
+        private readonly IConfigurationService _config;
+        private const string LogId = "DfiManageViewModel";
+
+        // ── Constructor ───────────────────────────────────────────────────────────
+
+        /// <summary>Initialises the ViewModel with the required services.</summary>
+        public DfiManageViewModel(IKwpService kwpService, IConfigurationService configService)
+        {
+            _kwp    = kwpService;
+            _config = configService;
+        }
+
+        // ── DFI display ───────────────────────────────────────────────────────────
+
+        /// <summary>Current DFI value read from the ECU (displayed in the label).</summary>
+        [ObservableProperty] private double _currentDfi;
+
+        /// <summary>
+        /// Slider position in integer hundredths of a DFI unit (range –300 to 300).
+        /// Divide by 100 to get the actual DFI value.
+        /// </summary>
+        [ObservableProperty]
+        [NotifyPropertyChangedFor(nameof(SliderDfiValue))]
+        private int _sliderRaw;
+
+        /// <summary>The DFI value represented by the current slider position.</summary>
+        public double SliderDfiValue => Math.Round(SliderRaw / 100.0, 2);
+
+        // ── Options ───────────────────────────────────────────────────────────────
+
+        /// <summary>
+        /// KWP protocol version index (0, 1, or 2) used when writing DFI.
+        /// Corresponds to the three known VP44 authentication variants.
+        /// </summary>
+        [ObservableProperty] private int _versionIndex = 1;
+
+        /// <summary>
+        /// When <see langword="true"/> the bench service may perform automatic DFI
+        /// correction during test phases; when <see langword="false"/> it skips them.
+        /// </summary>
+        [ObservableProperty] private bool _isAutoMode = true;
+
+        // ── Operation state ───────────────────────────────────────────────────────
+
+        /// <summary>True while a read or write K-Line operation is in progress.</summary>
+        [ObservableProperty]
+        [NotifyCanExecuteChangedFor(nameof(ReadDfiCommand))]
+        [NotifyCanExecuteChangedFor(nameof(WriteDfiCommand))]
+        private bool _isBusy;
+
+        /// <summary>Progress percentage (0–100) for the current K-Line operation.</summary>
+        [ObservableProperty] private int _progressPercent;
+
+        /// <summary>Verbose status message for the current K-Line operation.</summary>
+        [ObservableProperty] private string _progressMessage = string.Empty;
+
+        // ── Public API ────────────────────────────────────────────────────────────
+
+        /// <summary>
+        /// Sets the displayed DFI value and repositions the slider to match.
+        /// Safe to call from any thread.
+        /// </summary>
+        public void SetDfi(double dfi)
+        {
+            double rounded = Math.Round(dfi, 2);
+            Application.Current.Dispatcher.Invoke(() =>
+            {
+                CurrentDfi  = rounded;
+                SliderRaw   = (int)(rounded * 100);
+            });
+        }
+
+        // ── Commands ──────────────────────────────────────────────────────────────
+
+        /// <summary>Reads the current DFI value from the ECU over K-Line.</summary>
+        [RelayCommand(CanExecute = nameof(CanOperate))]
+        private async Task ReadDfiAsync()
+        {
+            string? port = _kwp.DetectKLinePort();
+            if (string.IsNullOrEmpty(port))
+            {
+                MessageBox.Show("K-Line device not found. Check that the FTDI adapter is connected.",
+                    "K-Line Error", MessageBoxButton.OK, MessageBoxImage.Warning);
+                return;
+            }
+
+            IsBusy = true;
+            _kwp.ProgressChanged += OnProgress;
+            try
+            {
+                string dfiStr = await _kwp.ReadDfiAsync(port);
+                if (double.TryParse(dfiStr,
+                        System.Globalization.NumberStyles.Any,
+                        System.Globalization.CultureInfo.InvariantCulture,
+                        out double val))
+                    SetDfi(val);
+            }
+            finally
+            {
+                _kwp.ProgressChanged -= OnProgress;
+                IsBusy = false;
+                ProgressPercent = 0;
+                ProgressMessage = string.Empty;
+            }
+        }
+
+        /// <summary>Writes the slider DFI value to the ECU and reads back the result.</summary>
+        [RelayCommand(CanExecute = nameof(CanOperate))]
+        private async Task WriteDfiAsync()
+        {
+            string? port = _kwp.DetectKLinePort();
+            if (string.IsNullOrEmpty(port))
+            {
+                MessageBox.Show("K-Line device not found. Check that the FTDI adapter is connected.",
+                    "K-Line Error", MessageBoxButton.OK, MessageBoxImage.Warning);
+                return;
+            }
+
+            float value   = (float)SliderDfiValue;
+            int   version = VersionIndex;
+
+            IsBusy = true;
+            _kwp.ProgressChanged += OnProgress;
+            try
+            {
+                string dfiStr = await _kwp.WriteDfiAsync(port, value, version);
+                if (double.TryParse(dfiStr,
+                        System.Globalization.NumberStyles.Any,
+                        System.Globalization.CultureInfo.InvariantCulture,
+                        out double val))
+                    SetDfi(val);
+            }
+            finally
+            {
+                _kwp.ProgressChanged -= OnProgress;
+                IsBusy = false;
+                ProgressPercent = 0;
+                ProgressMessage = string.Empty;
+            }
+        }
+
+        private bool CanOperate() => !IsBusy;
+
+        // ── Helpers ───────────────────────────────────────────────────────────────
+
+        private void OnProgress(int pct, string msg)
+        {
+            Application.Current.Dispatcher.Invoke(() =>
+            {
+                ProgressPercent = pct;
+                ProgressMessage = msg;
+            });
+        }
+    }
+}