using System;
using System.ComponentModel;
using System.Windows;
using System.Windows.Controls;
using Azaion.Common.DTO.Config;

namespace Azaion.Common.Controls;

public partial class CameraConfigControl
{
    public static readonly DependencyProperty CameraProperty = DependencyProperty.Register(
        nameof(Camera), typeof(CameraConfig), typeof(CameraConfigControl),
        new FrameworkPropertyMetadata(null, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault));

    public CameraConfig Camera
    {
        get => (CameraConfig)GetValue(CameraProperty) ?? new CameraConfig();
        set => SetValue(CameraProperty, value);
    }

    // Fires whenever any camera parameter value changes in UI
    public event EventHandler? CameraChanged;

    public CameraConfigControl()
    {
        InitializeComponent();
        DataContext = this;
        Loaded += OnLoaded;
    }

    private void OnLoaded(object sender, RoutedEventArgs e)
    {
        // Hook up change notifications
        if (AltitudeSlider != null)
            AltitudeSlider.ValueChanged += (_, __) => CameraChanged?.Invoke(this, EventArgs.Empty);

        SubscribeNud(AltitudeNud);
        SubscribeNud(FocalNud);
        SubscribeNud(SensorNud);
    }

    private void SubscribeNud(UserControl? nud)
    {
        if (nud is NumericUpDown num)
        {
            var dpd = DependencyPropertyDescriptor.FromProperty(NumericUpDown.ValueProperty, typeof(NumericUpDown));
            dpd?.AddValueChanged(num, (_, __) => CameraChanged?.Invoke(this, EventArgs.Empty));
        }
    }

    // Initializes the control with the provided CameraConfig instance and wires two-way binding via dependency property
    public void Init(CameraConfig cameraConfig)
    {
        Camera = cameraConfig;
    }
}