using CMM.Library.Config;
using CMM.Library.Method;
using CMM.Library.ViewModel;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Animation;

namespace DellMonitorControl;

public partial class MainWindow : Window
{
    private List<(XMonitor Monitor, List<InputSourceOption> Options)> _loadedMonitors = new();
    private Storyboard? _spinnerStoryboard;

    public MainWindow()
    {
        InitializeComponent();
        _spinnerStoryboard = (Storyboard)FindResource("SpinnerAnimation");
    }

    public void ShowNearTray()
    {
        var workArea = SystemParameters.WorkArea;
        Left = workArea.Right - Width - 10;
        Top = workArea.Bottom - 350;
        Show();
        Activate();

        // Start spinner
        _spinnerStoryboard?.Begin(this, true);

        Dispatcher.BeginInvoke(new Action(() =>
        {
            Top = workArea.Bottom - ActualHeight - 10;
        }), System.Windows.Threading.DispatcherPriority.Loaded);
    }

    private void Window_Deactivated(object sender, EventArgs e)
    {
        Hide();
        _spinnerStoryboard?.Stop(this);
    }

    private void ExitButton_Click(object sender, RoutedEventArgs e)
    {
        Application.Current.Shutdown();
    }

    public async Task LoadMonitors()
    {
        var newChildren = new List<UIElement>();
        _loadedMonitors.Clear();

        try
        {
            await CMMCommand.ScanMonitor();
            var monitors = (await CMMCommand.ReadMonitorsData()).ToList();

            if (!monitors.Any())
            {
                newChildren.Add(new TextBlock
                {
                    Text = "No DDC/CI monitors detected",
                    Foreground = Brushes.LightGray,
                    FontSize = 12,
                    HorizontalAlignment = HorizontalAlignment.Center,
                    Margin = new Thickness(0, 30, 0, 30)
                });
            }
            else
            {
                foreach (var m in monitors)
                {
                    var brightness = await CMMCommand.GetBrightness(m.SerialNumber) ?? 50;
                    var contrast = await CMMCommand.GetContrast(m.SerialNumber) ?? 50;
                    var inputSource = await CMMCommand.GetInputSource(m.SerialNumber);
                    var inputOptions = await CMMCommand.GetInputSourceOptions(m.SerialNumber);
                    var powerStatus = await CMMCommand.GetMonPowerStatus(m.SerialNumber) ?? "Unknown";

                    _loadedMonitors.Add((m, inputOptions));

                    // Apply config to filter hidden ports and use custom labels
                    var filteredOptions = MonitorConfigManager.ApplyConfigToOptions(m.SerialNumber, inputOptions);

                    // Monitor name header with Config button
                    newChildren.Add(CreateMonitorHeader(m, inputOptions));

                    newChildren.Add(CreateSliderRow("Brightness", brightness, m.SerialNumber, CMMCommand.SetBrightness));
                    newChildren.Add(CreateSliderRow("Contrast", contrast, m.SerialNumber, CMMCommand.SetContrast));

                    if (filteredOptions.Count > 0)
                        newChildren.Add(CreateInputRow(inputSource, filteredOptions, m.SerialNumber));

                    newChildren.Add(CreatePowerRow(powerStatus, m.SerialNumber));

                    // Separator
                    newChildren.Add(new Border { Height = 1, Background = new SolidColorBrush(Color.FromRgb(80, 80, 80)), Margin = new Thickness(0, 10, 0, 2) });
                }

                // Remove last separator
                if (newChildren.Count > 0 && newChildren.Last() is Border)
                    newChildren.RemoveAt(newChildren.Count - 1);
            }

            // Load quick-switch toolbar
            LoadQuickSwitchToolbar();
        }
        catch (Exception ex)
        {
            newChildren.Clear();
            newChildren.Add(new TextBlock { Text = $"Error: {ex.Message}", Foreground = Brushes.OrangeRed, FontSize = 11, TextWrapping = TextWrapping.Wrap });
        }

        // Stop spinner
        _spinnerStoryboard?.Stop(this);

        sp.VerticalAlignment = VerticalAlignment.Top;
        sp.Children.Clear();
        foreach (var child in newChildren)
            sp.Children.Add(child);

        Dispatcher.BeginInvoke(new Action(() =>
        {
            var workArea = SystemParameters.WorkArea;
            Top = workArea.Bottom - ActualHeight - 10;
        }), System.Windows.Threading.DispatcherPriority.Loaded);
    }

    private void LoadQuickSwitchToolbar()
    {
        quickSwitchPanel.Children.Clear();
        var quickItems = MonitorConfigManager.GetQuickSwitchItems();

        if (quickItems.Count == 0)
        {
            quickSwitchPanel.Visibility = Visibility.Collapsed;
            return;
        }

        quickSwitchPanel.Visibility = Visibility.Visible;

        foreach (var item in quickItems)
        {
            var btn = new Button
            {
                Content = $"{item.PortLabel}",
                ToolTip = $"{item.MonitorName}: {item.PortLabel}",
                Margin = new Thickness(0, 0, 6, 6),
                Style = (Style)FindResource("QuickSwitchButton"),
                Tag = item
            };

            btn.Click += async (s, e) =>
            {
                if (s is Button b && b.Tag is QuickSwitchItem qsi)
                {
                    await CMMCommand.SetInputSource(qsi.MonitorSerialNumber, qsi.PortVcpValue);
                    UpdateInputDropdown(qsi.MonitorSerialNumber, qsi.PortVcpValue);
                }
            };

            quickSwitchPanel.Children.Add(btn);
        }
    }

    private void UpdateInputDropdown(string serialNumber, int newValue)
    {
        foreach (var child in sp.Children)
        {
            if (child is StackPanel row)
            {
                foreach (var element in row.Children)
                {
                    if (element is ComboBox cb && cb.Tag is string sn && sn == serialNumber)
                    {
                        var options = cb.ItemsSource as List<InputSourceOption>;
                        if (options != null)
                        {
                            var index = options.FindIndex(o => o.Value == newValue);
                            if (index >= 0)
                                cb.SelectedIndex = index;
                        }
                        return;
                    }
                }
            }
        }
    }

    private StackPanel CreateMonitorHeader(XMonitor monitor, List<InputSourceOption> allOptions)
    {
        var row = new StackPanel { Orientation = Orientation.Horizontal, Margin = new Thickness(0, 8, 0, 6) };

        row.Children.Add(new TextBlock
        {
            Text = monitor.MonitorName,
            Foreground = Brushes.White,
            FontSize = 13,
            FontWeight = FontWeights.SemiBold,
            VerticalAlignment = VerticalAlignment.Center
        });

        var configBtn = new Button
        {
            Content = "Config",
            Margin = new Thickness(10, 0, 0, 0),
            FontSize = 11,
            Style = (Style)FindResource("DarkButton"),
            Tag = (monitor, allOptions)
        };

        configBtn.Click += ConfigButton_Click;
        row.Children.Add(configBtn);

        return row;
    }

    private async void ConfigButton_Click(object sender, RoutedEventArgs e)
    {
        if (sender is Button btn && btn.Tag is ValueTuple<XMonitor, List<InputSourceOption>> data)
        {
            var (monitor, options) = data;
            var configWindow = new ConfigWindow(monitor.SerialNumber, monitor.MonitorName, options);
            configWindow.Owner = this;
            configWindow.ShowDialog();

            if (configWindow.ConfigChanged)
            {
                MonitorConfigManager.ClearCache();
                await LoadMonitors();
            }
        }
    }

    private StackPanel CreateSliderRow(string label, int value, string serialNumber, Func<string, int, Task> setCommand)
    {
        var row = new StackPanel { Orientation = Orientation.Horizontal, Margin = new Thickness(0, 3, 0, 3) };
        row.Children.Add(new TextBlock { Text = label, Foreground = Brushes.LightGray, Width = 70, FontSize = 12, VerticalAlignment = VerticalAlignment.Center });

        var slider = new Slider { Minimum = 0, Maximum = 100, Value = value, Width = 140, Tag = serialNumber };
        var valueText = new TextBlock { Text = value.ToString(), Foreground = Brushes.White, Width = 30, FontSize = 12, Margin = new Thickness(5, 0, 0, 0) };

        slider.ValueChanged += (s, e) => valueText.Text = ((int)e.NewValue).ToString();
        slider.PreviewMouseUp += async (s, e) =>
        {
            if (s is Slider sl && sl.Tag is string sn)
                await setCommand(sn, (int)sl.Value);
        };

        row.Children.Add(slider);
        row.Children.Add(valueText);
        return row;
    }

    private StackPanel CreateInputRow(int? currentInput, List<InputSourceOption> options, string serialNumber)
    {
        var row = new StackPanel { Orientation = Orientation.Horizontal, Margin = new Thickness(0, 3, 0, 3) };
        row.Children.Add(new TextBlock { Text = "Input", Foreground = Brushes.LightGray, Width = 70, FontSize = 12, VerticalAlignment = VerticalAlignment.Center });

        var combo = new ComboBox
        {
            Width = 170,
            ItemsSource = options,
            DisplayMemberPath = "Name",
            Tag = serialNumber,
            Style = (Style)FindResource("DarkComboBox"),
            ItemContainerStyle = (Style)FindResource("DarkComboBoxItem")
        };

        row.Children.Add(combo);

        // Set selection AFTER adding to visual tree, BEFORE adding event handler
        if (currentInput.HasValue)
        {
            var index = options.FindIndex(o => o.Value == currentInput.Value);
            if (index >= 0)
                combo.SelectedIndex = index;
        }

        // Add event handler AFTER setting the initial selection
        combo.SelectionChanged += async (s, e) =>
        {
            // Only trigger if user actually changed the selection (not initial load)
            if (s is ComboBox cb && cb.Tag is string sn && cb.SelectedItem is InputSourceOption opt && e.AddedItems.Count > 0 && e.RemovedItems.Count > 0)
                await CMMCommand.SetInputSource(sn, opt.Value);
        };

        return row;
    }

    private StackPanel CreatePowerRow(string status, string serialNumber)
    {
        var row = new StackPanel { Orientation = Orientation.Horizontal, Margin = new Thickness(0, 3, 0, 3) };
        row.Children.Add(new TextBlock { Text = "Power", Foreground = Brushes.LightGray, Width = 70, FontSize = 12, VerticalAlignment = VerticalAlignment.Center });

        var btn = new Button
        {
            Content = status,
            Width = 170,
            Tag = serialNumber,
            Style = (Style)FindResource("DarkButton")
        };
        btn.Click += async (s, e) =>
        {
            if (s is Button b && b.Tag is string sn)
            {
                var current = await CMMCommand.GetMonPowerStatus(sn);
                if (current == "Sleep" || current == "PowerOff")
                    await CMMCommand.PowerOn(sn);
                else
                    await CMMCommand.Sleep(sn);
                await Task.Delay(1000);
                b.Content = await CMMCommand.GetMonPowerStatus(sn);
            }
        };

        row.Children.Add(btn);
        return row;
    }
}