using Robust.Client.AutoGenerated;
using Robust.Client.UserInterface;
using Robust.Client.UserInterface.Controls;
using Robust.Client.UserInterface.XAML;
using Robust.Shared.Input;

namespace Content.Client.Instruments.UI;

[GenerateTypedNameReferences]
public sealed partial class MinVolumeControl : BoxContainer
{
    /// <summary>
    /// Raised when the user changes the min volume for MIDI input.
    /// </summary>
    public event Action<int>? MinVolumeChanged;

    public int MinVolume
    {
        get => (int)Math.Ceiling(MidiMinVolumeSlider.Value);
        set
        {
            MidiMinVolumeSlider.Value = value;
            UpdateLabel();
        }
    }

    public MinVolumeControl()
    {
        RobustXamlLoader.Load(this);
        IoCManager.InjectDependencies(this);

        MidiMinVolumeSlider.OnValueChanged += OnMidiMinVolumeSliderValueChanged;
        MidiMinVolumeSlider.OnKeyBindUp += OnMidiMinVolumeSliderKeyUp;
        MidiMinVolumeSlider.Value = 0;
    }

    private void OnMidiMinVolumeSliderValueChanged(Robust.Client.UserInterface.Controls.Range _)
    {
        UpdateLabel();

        // Do not update while still grabbed.
        if (MidiMinVolumeSlider.Grabbed)
            return;

        MinVolumeChanged?.Invoke(MinVolume);
    }

    private void OnMidiMinVolumeSliderKeyUp(GUIBoundKeyEventArgs args)
    {
        if (args.Function != EngineKeyFunctions.UIClick)
            return;

        UpdateLabel();
        MinVolumeChanged?.Invoke(MinVolume);
    }

    private void UpdateLabel()
    {
        MidiMinVolumeValueLabel.Text = ((int)Math.Ceiling(MidiMinVolumeSlider.Value)).ToString();
    }
}