using Microsoft.UI;
using Microsoft.UI.Windowing;
using Microsoft.UI.Xaml;
using TeamsISO.App.WinUI.Services;
using TeamsISO.App.WinUI.ViewModels;
using Windows.Graphics;
using Windows.UI;

namespace TeamsISO.App.WinUI.Views;

public sealed partial class MainWindow : Window
{
    private MainViewModel? _viewModel;

    public MainWindow()
    {
        InitializeComponent();

        Title = "TeamsISO";

        ExtendsContentIntoTitleBar = true;
        SetTitleBar(AppTitleBar);

        AppWindow.TitleBar.ButtonBackgroundColor = Colors.Transparent;
        AppWindow.TitleBar.ButtonInactiveBackgroundColor = Colors.Transparent;
        AppWindow.TitleBar.ButtonHoverForegroundColor = Colors.White;

        AppWindow.Resize(new SizeInt32(1280, 780));

        ThemeManager.Current.Themed += (_, theme) => ApplyResolvedTheme(theme);
        ApplyResolvedTheme(ThemeManager.Current.ResolveTheme());
    }

    /// <summary>
    /// Hook the engine view-model in. Replaces the placeholder StackPanel
    /// inside ParticipantsHost with a live ListView. Rather than fight WinUI
    /// 3's DataTemplate compilation, we subscribe to the Participants
    /// collection and rebuild a simple StackPanel of row controls on
    /// every change. Less efficient than a virtualized ListView for huge
    /// lists, fine for the operator's ~10 max participants.
    /// </summary>
    public void AttachViewModel(MainViewModel viewModel)
    {
        _viewModel = viewModel;

        // Section header + in-call buttons → view-model commands.
        // The buttons exist in MainWindow.xaml with the matching x:Names.
        RefreshButton.Command = viewModel.RefreshDiscoveryCommand;
        EnableAllButton.Command = viewModel.EnableAllOnlineCommand;
        StopAllButton.Command = viewModel.StopAllIsosCommand;
        MarkerButton.Command = viewModel.DropRecordingMarkerCommand;

        // Status bar + participant count text refresh on VM property changes.
        ParticipantCountText.Text = viewModel.ParticipantCountText;
        StatusBarText.Text = viewModel.StatusText;
        viewModel.PropertyChanged += (_, e) =>
        {
            DispatcherQueue.TryEnqueue(() =>
            {
                switch (e.PropertyName)
                {
                    case nameof(MainViewModel.ParticipantCountText):
                        ParticipantCountText.Text = viewModel.ParticipantCountText;
                        break;
                    case nameof(MainViewModel.StatusText):
                        StatusBarText.Text = viewModel.StatusText;
                        break;
                }
            });
        };

        ParticipantsHost.Children.Clear();
        var stack = new Microsoft.UI.Xaml.Controls.StackPanel
        {
            HorizontalAlignment = HorizontalAlignment.Stretch,
            VerticalAlignment = VerticalAlignment.Top,
        };
        var scroll = new Microsoft.UI.Xaml.Controls.ScrollViewer
        {
            VerticalScrollBarVisibility = Microsoft.UI.Xaml.Controls.ScrollBarVisibility.Auto,
            Content = stack,
        };
        ParticipantsHost.Children.Add(scroll);

        void Rebuild()
        {
            stack.Children.Clear();
            foreach (var p in viewModel.Participants)
            {
                stack.Children.Add(BuildSimpleRow(p));
            }
        }

        viewModel.Participants.CollectionChanged += (_, _) =>
        {
            DispatcherQueue.TryEnqueue(Rebuild);
        };
        Rebuild();
    }

    /// <summary>
    /// Minimal participant row — name + ISO state + toggle button. Drops
    /// the brushed avatar / theme-resource lookups that may have been
    /// triggering the crash. The full visual row template comes back
    /// after we've verified the binding path works.
    /// </summary>
    private static Microsoft.UI.Xaml.Controls.Grid BuildSimpleRow(ParticipantViewModel p)
    {
        var grid = new Microsoft.UI.Xaml.Controls.Grid
        {
            Height = 56,
            Padding = new Thickness(20, 0, 20, 0),
        };
        grid.ColumnDefinitions.Add(new Microsoft.UI.Xaml.Controls.ColumnDefinition { Width = new Microsoft.UI.Xaml.GridLength(1, Microsoft.UI.Xaml.GridUnitType.Star) });
        grid.ColumnDefinitions.Add(new Microsoft.UI.Xaml.Controls.ColumnDefinition { Width = new Microsoft.UI.Xaml.GridLength(120) });
        grid.ColumnDefinitions.Add(new Microsoft.UI.Xaml.Controls.ColumnDefinition { Width = Microsoft.UI.Xaml.GridLength.Auto });

        var nameStack = new Microsoft.UI.Xaml.Controls.StackPanel
        {
            VerticalAlignment = VerticalAlignment.Center,
            Spacing = 2,
        };
        var nameText = new Microsoft.UI.Xaml.Controls.TextBlock
        {
            Text = p.DisplayName,
            FontSize = 14,
            FontWeight = Microsoft.UI.Text.FontWeights.Medium,
        };
        var codecText = new Microsoft.UI.Xaml.Controls.TextBlock
        {
            Text = p.SourceCodec,
            FontSize = 11,
            Opacity = 0.6,
        };
        nameStack.Children.Add(nameText);
        nameStack.Children.Add(codecText);
        Microsoft.UI.Xaml.Controls.Grid.SetColumn(nameStack, 0);
        grid.Children.Add(nameStack);

        var outputText = new Microsoft.UI.Xaml.Controls.TextBlock
        {
            Text = p.OutputName,
            FontFamily = new Microsoft.UI.Xaml.Media.FontFamily("Consolas"),
            FontSize = 12,
            VerticalAlignment = VerticalAlignment.Center,
        };
        Microsoft.UI.Xaml.Controls.Grid.SetColumn(outputText, 1);
        grid.Children.Add(outputText);

        var pillText = new Microsoft.UI.Xaml.Controls.TextBlock
        {
            Text = p.IsoStateLabel,
            FontSize = 11,
            FontWeight = Microsoft.UI.Text.FontWeights.SemiBold,
            HorizontalAlignment = HorizontalAlignment.Center,
        };
        var pill = new Microsoft.UI.Xaml.Controls.Button
        {
            Command = p.ToggleIsoCommand,
            MinWidth = 80,
            Padding = new Thickness(14, 6, 14, 6),
            CornerRadius = new CornerRadius(999),
            VerticalAlignment = VerticalAlignment.Center,
            Content = pillText,
        };
        Microsoft.UI.Xaml.Controls.Grid.SetColumn(pill, 2);
        grid.Children.Add(pill);

        p.PropertyChanged += (_, e) =>
        {
            grid.DispatcherQueue.TryEnqueue(() =>
            {
                switch (e.PropertyName)
                {
                    case nameof(ParticipantViewModel.DisplayName):
                        nameText.Text = p.DisplayName;
                        break;
                    case nameof(ParticipantViewModel.SourceCodec):
                        codecText.Text = p.SourceCodec;
                        break;
                    case nameof(ParticipantViewModel.OutputName):
                        outputText.Text = p.OutputName;
                        break;
                    case nameof(ParticipantViewModel.IsoStateLabel):
                    case nameof(ParticipantViewModel.IsEnabled):
                        pillText.Text = p.IsoStateLabel;
                        break;
                }
            });
        };

        return grid;
    }

    /// <summary>Full rich row template — replaces BuildSimpleRow once we've verified the simple version doesn't crash.</summary>
    private static Microsoft.UI.Xaml.Controls.Grid BuildParticipantRow(ParticipantViewModel p)
    {
        var grid = new Microsoft.UI.Xaml.Controls.Grid
        {
            Height = 64,
            Padding = new Thickness(14, 0, 12, 0),
            BorderBrush = (Microsoft.UI.Xaml.Media.Brush)Application.Current.Resources["BorderSubtle"],
            BorderThickness = new Thickness(0, 0, 0, 1),
        };
        grid.ColumnDefinitions.Add(new Microsoft.UI.Xaml.Controls.ColumnDefinition { Width = new Microsoft.UI.Xaml.GridLength(44) });
        grid.ColumnDefinitions.Add(new Microsoft.UI.Xaml.Controls.ColumnDefinition { Width = new Microsoft.UI.Xaml.GridLength(2, Microsoft.UI.Xaml.GridUnitType.Star) });
        grid.ColumnDefinitions.Add(new Microsoft.UI.Xaml.Controls.ColumnDefinition { Width = new Microsoft.UI.Xaml.GridLength(1.4, Microsoft.UI.Xaml.GridUnitType.Star) });
        grid.ColumnDefinitions.Add(new Microsoft.UI.Xaml.Controls.ColumnDefinition { Width = new Microsoft.UI.Xaml.GridLength(1.6, Microsoft.UI.Xaml.GridUnitType.Star) });
        grid.ColumnDefinitions.Add(new Microsoft.UI.Xaml.Controls.ColumnDefinition { Width = Microsoft.UI.Xaml.GridLength.Auto });

        // Avatar
        var avatar = new Microsoft.UI.Xaml.Controls.Border
        {
            Width = 36, Height = 36,
            CornerRadius = new CornerRadius(18),
            Background = (Microsoft.UI.Xaml.Media.Brush)Application.Current.Resources["AccentCyanMuted"],
            VerticalAlignment = VerticalAlignment.Center,
        };
        var initialsText = new Microsoft.UI.Xaml.Controls.TextBlock
        {
            Text = p.Initials,
            FontSize = 13,
            FontWeight = Microsoft.UI.Text.FontWeights.SemiBold,
            Foreground = (Microsoft.UI.Xaml.Media.Brush)Application.Current.Resources["AccentCyanText"],
            HorizontalAlignment = HorizontalAlignment.Center,
            VerticalAlignment = VerticalAlignment.Center,
        };
        avatar.Child = initialsText;
        Microsoft.UI.Xaml.Controls.Grid.SetColumn(avatar, 0);
        grid.Children.Add(avatar);

        // Name + codec
        var nameStack = new Microsoft.UI.Xaml.Controls.StackPanel
        {
            Margin = new Thickness(12, 0, 0, 0),
            VerticalAlignment = VerticalAlignment.Center,
            Spacing = 2,
        };
        var nameText = new Microsoft.UI.Xaml.Controls.TextBlock
        {
            Text = p.DisplayName,
            FontSize = 13,
            FontWeight = Microsoft.UI.Text.FontWeights.Medium,
            Foreground = (Microsoft.UI.Xaml.Media.Brush)Application.Current.Resources["FgPrimary"],
        };
        var codecText = new Microsoft.UI.Xaml.Controls.TextBlock
        {
            Text = p.SourceCodec,
            FontSize = 11,
            Foreground = (Microsoft.UI.Xaml.Media.Brush)Application.Current.Resources["FgSecondary"],
        };
        nameStack.Children.Add(nameText);
        nameStack.Children.Add(codecText);
        Microsoft.UI.Xaml.Controls.Grid.SetColumn(nameStack, 1);
        grid.Children.Add(nameStack);

        // Audio meter
        var meter = new Microsoft.UI.Xaml.Controls.ProgressBar
        {
            Maximum = 1.0,
            Value = p.DisplayedAudioLevel,
            Height = 4,
            Margin = new Thickness(12, 0, 12, 0),
            VerticalAlignment = VerticalAlignment.Center,
        };
        Microsoft.UI.Xaml.Controls.Grid.SetColumn(meter, 2);
        grid.Children.Add(meter);

        // Output name
        var outputText = new Microsoft.UI.Xaml.Controls.TextBlock
        {
            Text = p.OutputName,
            FontFamily = new Microsoft.UI.Xaml.Media.FontFamily("Consolas"),
            FontSize = 12,
            Foreground = (Microsoft.UI.Xaml.Media.Brush)Application.Current.Resources["FgPrimary"],
            VerticalAlignment = VerticalAlignment.Center,
        };
        Microsoft.UI.Xaml.Controls.Grid.SetColumn(outputText, 3);
        grid.Children.Add(outputText);

        // ISO toggle pill
        var pillText = new Microsoft.UI.Xaml.Controls.TextBlock
        {
            Text = p.IsoStateLabel,
            FontSize = 11,
            FontWeight = Microsoft.UI.Text.FontWeights.SemiBold,
            Foreground = (Microsoft.UI.Xaml.Media.Brush)Application.Current.Resources["FgPrimary"],
            HorizontalAlignment = HorizontalAlignment.Center,
        };
        var pill = new Microsoft.UI.Xaml.Controls.Button
        {
            Command = p.ToggleIsoCommand,
            MinWidth = 80,
            Padding = new Thickness(14, 6, 14, 6),
            Background = (Microsoft.UI.Xaml.Media.Brush)Application.Current.Resources["BgSurface"],
            BorderBrush = (Microsoft.UI.Xaml.Media.Brush)Application.Current.Resources["BorderStrong"],
            BorderThickness = new Thickness(1),
            CornerRadius = new CornerRadius(999),
            VerticalAlignment = VerticalAlignment.Center,
            Content = pillText,
        };
        Microsoft.UI.Xaml.Controls.Grid.SetColumn(pill, 4);
        grid.Children.Add(pill);

        // Per-row property-change subscription — refresh text as the
        // engine pushes updates.
        p.PropertyChanged += (_, e) =>
        {
            grid.DispatcherQueue.TryEnqueue(() =>
            {
                switch (e.PropertyName)
                {
                    case nameof(ParticipantViewModel.DisplayName):
                        nameText.Text = p.DisplayName;
                        initialsText.Text = p.Initials;
                        break;
                    case nameof(ParticipantViewModel.SourceCodec):
                        codecText.Text = p.SourceCodec;
                        break;
                    case nameof(ParticipantViewModel.DisplayedAudioLevel):
                        meter.Value = p.DisplayedAudioLevel;
                        break;
                    case nameof(ParticipantViewModel.OutputName):
                        outputText.Text = p.OutputName;
                        break;
                    case nameof(ParticipantViewModel.IsoStateLabel):
                    case nameof(ParticipantViewModel.IsEnabled):
                        pillText.Text = p.IsoStateLabel;
                        break;
                }
            });
        };

        return grid;
    }

    private void OnThemeToggleClick(object sender, RoutedEventArgs e)
    {
        ThemeManager.Current.Toggle();
    }

    private bool _drawerOpen;

    private void OnSettingsClick(object sender, RoutedEventArgs e)
    {
        _drawerOpen = !_drawerOpen;
        SettingsDrawerHost.Visibility = _drawerOpen
            ? Visibility.Visible
            : Visibility.Collapsed;
        if (_drawerOpen)
        {
            SettingsDrawerHost.CloseRequested -= OnDrawerCloseRequested;
            SettingsDrawerHost.CloseRequested += OnDrawerCloseRequested;
        }
    }

    private void OnDrawerCloseRequested(object? sender, System.EventArgs e)
    {
        _drawerOpen = false;
        SettingsDrawerHost.Visibility = Visibility.Collapsed;
    }

    private void ApplyResolvedTheme(ElementTheme theme)
    {
        if (Content is FrameworkElement root)
        {
            root.RequestedTheme = theme;
        }

        AppWindow.TitleBar.ButtonForegroundColor = ThemeManager.TitleBarForegroundFor(theme);
        AppWindow.TitleBar.ButtonHoverBackgroundColor = ThemeManager.TitleBarHoverBgFor(theme);
        AppWindow.TitleBar.ButtonPressedBackgroundColor = ThemeManager.TitleBarHoverBgFor(theme);

        ThemeToggleIcon.Glyph = theme == ElementTheme.Light ? "" : "";
    }

}