WindowsMusicPlayer-TheUntamedMusicPlayer/The Untamed Music Player/ViewModels/RootPlayBarViewModel.cs

using System.ComponentModel;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Input;
using Microsoft.UI.Xaml.Media.Animation;
using The_Untamed_Music_Player.Models;
using The_Untamed_Music_Player.Views;

namespace The_Untamed_Music_Player.ViewModels;
public partial class RootPlayBarViewModel : INotifyPropertyChanged
{
    public static RootPlayBarView? RootPlayBarView;
    private Visibility _buttonVisibility = Visibility.Collapsed;
    public Visibility ButtonVisibility
    {
        get => _buttonVisibility;
        set
        {
            _buttonVisibility = value;
            OnPropertyChanged(nameof(ButtonVisibility));
        }
    }

    private bool _availability = false;
    public bool Availability
    {
        get => _availability;
        set
        {
            _availability = value;
            OnPropertyChanged(nameof(Availability));
        }
    }

    public event PropertyChangedEventHandler? PropertyChanged;
    public void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }

    public RootPlayBarViewModel()
    {
        Data.RootPlayBarViewModel = this;
        RootPlayBarView?.GetProgressSlider().AddHandler(UIElement.PointerPressedEvent, new PointerEventHandler(Data.MusicPlayer.ProgressLock), true);
        RootPlayBarView?.GetProgressSlider().AddHandler(UIElement.PointerMovedEvent, new PointerEventHandler(Data.MusicPlayer.SliderUpdate), true);
        RootPlayBarView?.GetProgressSlider().AddHandler(UIElement.PointerReleasedEvent, new PointerEventHandler(Data.MusicPlayer.ProgressUpdate), true);
    }

    public string GetCurrent(TimeSpan current)
    {
        if (current.Hours > 0)
        {
            return $"{current:hh\\:mm\\:ss}";
        }
        else
        {
            return $"0:{current:mm\\:ss}";
        }
    }

    public string GetRemaining(TimeSpan current, TimeSpan total)
    {
        var remaining = total - current;
        if (remaining.Hours > 0)
        {
            return $"{remaining:hh\\:mm\\:ss}";
        }
        else
        {
            return $"0:{remaining:mm\\:ss}";
        }
    }

    public string GetPlayPauseIcon(int playstate)
    {
        return playstate switch
        {
            0 => "\uF5B0",
            1 => "\uF8AE",
            2 => "\uF5B0",
            _ => "\uF5B0",
        };
    }

    public Visibility GetSliderVisibility(int playstate)
    {
        return playstate switch
        {
            0 => Visibility.Visible,
            1 => Visibility.Visible,
            2 => Visibility.Collapsed,
            _ => Visibility.Visible,
        };
    }

    public Visibility GetProgressVisibility(int playstate)
    {
        return playstate switch
        {
            0 => Visibility.Collapsed,
            1 => Visibility.Collapsed,
            2 => Visibility.Visible,
            _ => Visibility.Collapsed,
        };
    }

    public Visibility GetArtistAndAlbumStrVisibility(DetailedMusicInfo detailedmusicinfo)
    {
        return detailedmusicinfo.ArtistAndAlbumStr == "" ? Visibility.Collapsed : Visibility.Visible;
    }


    public Visibility GetShuffleModeIcon(bool shufflemode)
    {
        return shufflemode ? Visibility.Collapsed : Visibility.Visible;
    }

    public string GetRepeatModeIcon(int repeatmode)
    {
        return repeatmode switch
        {
            0 => "\uF5E7",
            1 => "\uE8EE",
            2 => "\uE8ED",
            _ => "\uF5E7",
        };
    }

    public string GetVolumeIcon(double volume)
    {
        if (volume >= 67)
        {
            return "\uE995";
        }
        else if (volume >= 34)
        {
            return "\uE994";
        }
        else if (volume >= 1)
        {
            return "\uE993";
        }
        else
        {
            return "\uE74F";
        }
    }

    public void CoverBtnClickToDetail(object sender, RoutedEventArgs e)
    {
        if (!Data.IsDetail)
        {
            if (Data.MainWindow != null)
            {
                var newPage = new 歌词Page();
                var frame = Data.MainWindow.GetShellFrame();

                // 创建渐变动画
                var fadeOutAnimation = new DoubleAnimation
                {
                    From = 1.0,
                    To = 0,
                    Duration = new Duration(TimeSpan.FromSeconds(0.1))
                };

                var fadeInAnimation = new DoubleAnimation
                {
                    From = 0,
                    To = 1.0,
                    Duration = new Duration(TimeSpan.FromSeconds(0.2))
                };

                var fadeOutStoryboard = new Storyboard();
                fadeOutStoryboard.Children.Add(fadeOutAnimation);
                Storyboard.SetTarget(fadeOutAnimation, frame);
                Storyboard.SetTargetProperty(fadeOutAnimation, "Opacity");

                var fadeInStoryboard = new Storyboard();
                fadeInStoryboard.Children.Add(fadeInAnimation);
                Storyboard.SetTarget(fadeInAnimation, frame);
                Storyboard.SetTargetProperty(fadeInAnimation, "Opacity");

                // 动画完成后设置新内容
                fadeOutAnimation.Completed += (s, a) =>
                {
                    fadeInStoryboard.Begin();
                    frame.Content = newPage;
                };

                fadeOutStoryboard.Begin();

                if (RootPlayBarView != null)
                {
                    RootPlayBarView.GetCoverBorder().Visibility = Visibility.Collapsed;
                }
                Data.IsDetail = true;
            }
        }
        else
        {
            if (Data.MainWindow != null)
            {
                var mainPage = Data.ShellPage;
                var frame = Data.MainWindow.GetShellFrame();

                // 创建渐变动画
                var fadeOutAnimation = new DoubleAnimation
                {
                    From = 1.0,
                    To = 0,
                    Duration = new Duration(TimeSpan.FromSeconds(0.1))
                };

                var fadeInAnimation = new DoubleAnimation
                {
                    From = 0,
                    To = 1.0,
                    Duration = new Duration(TimeSpan.FromSeconds(0.2))
                };

                var fadeOutStoryboard = new Storyboard();
                fadeOutStoryboard.Children.Add(fadeOutAnimation);
                Storyboard.SetTarget(fadeOutAnimation, frame);
                Storyboard.SetTargetProperty(fadeOutAnimation, "Opacity");

                var fadeInStoryboard = new Storyboard();
                fadeInStoryboard.Children.Add(fadeInAnimation);
                Storyboard.SetTarget(fadeInAnimation, frame);
                Storyboard.SetTargetProperty(fadeInAnimation, "Opacity");

                // 动画完成后设置新内容
                fadeOutAnimation.Completed += (s, a) =>
                {
                    fadeInStoryboard.Begin();
                    frame.Content = mainPage;
                };

                fadeOutStoryboard.Begin();

                if (RootPlayBarView != null)
                {
                    RootPlayBarView.GetCoverBorder().Visibility = Visibility.Visible;
                }
                Data.IsDetail = false;
                GC.Collect();
            }
        }
    }
}