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;
using System.Windows.Threading;

namespace DellMonitorControl;

public partial class MainWindow : Window
{
    private List<(XMonitor Monitor, List<InputSourceOption> Options)> _loadedMonitors = new();
    private Storyboard? _spinnerStoryboard;
    private DispatcherTimer? _showLogButtonTimer;
    private UpdateInfo? _pendingUpdate;
    private DateTime _lastUpdateCheck = DateTime.MinValue;

    public MainWindow()
    {
        InitializeComponent();
        _spinnerStoryboard = (Storyboard)FindResource("SpinnerAnimation");
        DebugLogger.Log("MainWindow initialized");
    }

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

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

        // Show log button after 3 seconds if still loading
        showLogButton.Visibility = Visibility.Collapsed;
        _showLogButtonTimer?.Stop();
        _showLogButtonTimer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(3) };
        _showLogButtonTimer.Tick += (s, e) =>
        {
            _showLogButtonTimer.Stop();
            if (loadingPanel.Visibility == Visibility.Visible || sp.Children.Contains(loadingPanel))
            {
                showLogButton.Visibility = Visibility.Visible;
                DebugLogger.Log("Show Log button displayed (loading took > 3s)");
            }
        };
        _showLogButtonTimer.Start();

        // Check for updates in background (max once per hour)
        if ((DateTime.Now - _lastUpdateCheck).TotalMinutes > 60)
        {
            _lastUpdateCheck = DateTime.Now;
            _ = CheckForUpdatesAsync();
        }

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

    private async Task CheckForUpdatesAsync()
    {
        try
        {
            var update = await UpdateChecker.CheckForUpdateAsync();
            if (update != null)
            {
                _pendingUpdate = update;
                await Dispatcher.InvokeAsync(() => ShowUpdateBanner(update));
            }
        }
        catch
        {
            // Silently ignore update check failures
        }
    }

    private void ShowUpdateBanner(UpdateInfo update)
    {
        updateBanner.Visibility = Visibility.Visible;
        updateText.Text = $"v{update.LatestVersion} available - Click to update";
    }

    private void UpdateBanner_Click(object sender, System.Windows.Input.MouseButtonEventArgs e)
    {
        if (_pendingUpdate != null && !string.IsNullOrEmpty(_pendingUpdate.DownloadUrl))
        {
            UpdateChecker.OpenDownloadPage(_pendingUpdate.DownloadUrl);
        }
    }

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

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

    private void AboutButton_Click(object sender, RoutedEventArgs e)
    {
        var version = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
        var versionStr = $"{version?.Major}.{version?.Minor}.{version?.Build}";

        var aboutWindow = new Window
        {
            Title = "About Monitor Control",
            Width = 300,
            Height = 180,
            WindowStartupLocation = WindowStartupLocation.CenterScreen,
            ResizeMode = ResizeMode.NoResize,
            WindowStyle = WindowStyle.None,
            AllowsTransparency = true,
            Background = Brushes.Transparent
        };

        var border = new Border
        {
            Background = new SolidColorBrush(Color.FromArgb(0xF0, 0x33, 0x33, 0x33)),
            CornerRadius = new CornerRadius(8),
            BorderBrush = new SolidColorBrush(Color.FromRgb(0x55, 0x55, 0x55)),
            BorderThickness = new Thickness(1),
            Padding = new Thickness(20)
        };

        var stack = new StackPanel { VerticalAlignment = VerticalAlignment.Center };

        stack.Children.Add(new TextBlock
        {
            Text = "Monitor Control",
            Foreground = Brushes.White,
            FontSize = 18,
            FontWeight = FontWeights.SemiBold,
            HorizontalAlignment = HorizontalAlignment.Center,
            Margin = new Thickness(0, 0, 0, 5)
        });

        stack.Children.Add(new TextBlock
        {
            Text = $"Version {versionStr}",
            Foreground = Brushes.LightGray,
            FontSize = 12,
            HorizontalAlignment = HorizontalAlignment.Center,
            Margin = new Thickness(0, 0, 0, 10)
        });

        stack.Children.Add(new TextBlock
        {
            Text = "by David H. Friedel Jr",
            Foreground = Brushes.Gray,
            FontSize = 11,
            HorizontalAlignment = HorizontalAlignment.Center
        });

        stack.Children.Add(new TextBlock
        {
            Text = "MarketAlly",
            Foreground = Brushes.Gray,
            FontSize = 11,
            HorizontalAlignment = HorizontalAlignment.Center,
            Margin = new Thickness(0, 0, 0, 15)
        });

        var closeBtn = new Button
        {
            Content = "OK",
            Width = 80,
            HorizontalAlignment = HorizontalAlignment.Center,
            Style = (Style)FindResource("DarkButton")
        };
        closeBtn.Click += (s, args) => aboutWindow.Close();
        stack.Children.Add(closeBtn);

        border.Child = stack;
        aboutWindow.Content = border;
        aboutWindow.ShowDialog();
    }

    private void ShowLogButton_Click(object sender, RoutedEventArgs e)
    {
        var logWindow = new Window
        {
            Title = "Debug Log",
            Width = 600,
            Height = 400,
            WindowStartupLocation = WindowStartupLocation.CenterScreen,
            Background = new SolidColorBrush(Color.FromRgb(45, 45, 45))
        };

        var grid = new Grid();
        grid.RowDefinitions.Add(new RowDefinition { Height = new GridLength(1, GridUnitType.Star) });
        grid.RowDefinitions.Add(new RowDefinition { Height = GridLength.Auto });

        var textBox = new TextBox
        {
            Text = DebugLogger.GetLogs(),
            IsReadOnly = true,
            Background = new SolidColorBrush(Color.FromRgb(30, 30, 30)),
            Foreground = Brushes.LightGray,
            FontFamily = new FontFamily("Consolas"),
            FontSize = 11,
            VerticalScrollBarVisibility = ScrollBarVisibility.Auto,
            HorizontalScrollBarVisibility = ScrollBarVisibility.Auto,
            TextWrapping = TextWrapping.NoWrap,
            Margin = new Thickness(10)
        };
        Grid.SetRow(textBox, 0);
        grid.Children.Add(textBox);

        var buttonPanel = new StackPanel { Orientation = Orientation.Horizontal, HorizontalAlignment = HorizontalAlignment.Right, Margin = new Thickness(10) };

        var copyBtn = new Button { Content = "Copy to Clipboard", Padding = new Thickness(10, 5, 10, 5), Margin = new Thickness(0, 0, 10, 0) };
        copyBtn.Click += (s, args) =>
        {
            Clipboard.SetText(DebugLogger.GetLogs());
            MessageBox.Show("Log copied to clipboard!", "Debug Log", MessageBoxButton.OK, MessageBoxImage.Information);
        };
        buttonPanel.Children.Add(copyBtn);

        var openFileBtn = new Button { Content = "Open Log File", Padding = new Thickness(10, 5, 10, 5), Margin = new Thickness(0, 0, 10, 0) };
        openFileBtn.Click += (s, args) =>
        {
            try
            {
                System.Diagnostics.Process.Start("explorer.exe", $"/select,\"{DebugLogger.LogFilePath}\"");
            }
            catch { }
        };
        buttonPanel.Children.Add(openFileBtn);

        var closeBtn = new Button { Content = "Close", Padding = new Thickness(10, 5, 10, 5) };
        closeBtn.Click += (s, args) => logWindow.Close();
        buttonPanel.Children.Add(closeBtn);

        Grid.SetRow(buttonPanel, 1);
        grid.Children.Add(buttonPanel);

        logWindow.Content = grid;
        logWindow.Show();
    }

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

        try
        {
            DebugLogger.Log("Scanning for monitors...");
            await CMMCommand.ScanMonitor();
            DebugLogger.Log("Scan complete, reading monitor data...");
            var monitors = (await CMMCommand.ReadMonitorsData()).ToList();
            DebugLogger.Log($"Found {monitors.Count} monitor(s)");

            if (!monitors.Any())
            {
                DebugLogger.Log("No DDC/CI monitors detected");
                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)
                {
                    DebugLogger.Log($"Processing monitor: {m.MonitorName} (SN: {m.SerialNumber})");

                    DebugLogger.Log($"  Getting brightness...");
                    var brightness = await CMMCommand.GetBrightness(m.SerialNumber) ?? 50;
                    DebugLogger.Log($"  Brightness: {brightness}");

                    DebugLogger.Log($"  Getting contrast...");
                    var contrast = await CMMCommand.GetContrast(m.SerialNumber) ?? 50;
                    DebugLogger.Log($"  Contrast: {contrast}");

                    DebugLogger.Log($"  Getting input source...");
                    var inputSource = await CMMCommand.GetInputSource(m.SerialNumber);
                    DebugLogger.Log($"  Input source: {inputSource}");

                    DebugLogger.Log($"  Getting input options...");
                    var inputOptions = await CMMCommand.GetInputSourceOptions(m.SerialNumber);
                    DebugLogger.Log($"  Input options count: {inputOptions.Count}");

                    // Add any previously discovered ports from config
                    var discoveredPorts = MonitorConfigManager.GetDiscoveredPorts(m.SerialNumber, inputOptions);
                    foreach (var port in discoveredPorts)
                    {
                        inputOptions.Insert(0, port);
                        DebugLogger.Log($"  Added discovered port from config: {port.Value} ({port.Name})");
                    }

                    // Some monitors don't report current input in their possible values list
                    // Add it if missing and save to config for future
                    if (inputSource.HasValue && !inputOptions.Any(o => o.Value == inputSource.Value))
                    {
                        var currentInputName = CMMCommand.GetInputSourceName(inputSource.Value);
                        inputOptions.Insert(0, new InputSourceOption(inputSource.Value, currentInputName));
                        DebugLogger.Log($"  Added missing current input: {inputSource.Value} ({currentInputName})");

                        // Save this discovered port so it appears in future even when not current
                        MonitorConfigManager.AddDiscoveredPort(m.SerialNumber, m.MonitorName, inputSource.Value, currentInputName);
                        DebugLogger.Log($"  Saved discovered port to config");
                    }

                    DebugLogger.Log($"  Getting power status...");
                    var powerStatus = await CMMCommand.GetMonPowerStatus(m.SerialNumber) ?? "Unknown";
                    DebugLogger.Log($"  Power status: {powerStatus}");

                    _loadedMonitors.Add((m, inputOptions));

                    // Apply config to filter hidden ports and use custom labels
                    // Pass currentInput so we never hide the currently active port
                    var filteredOptions = MonitorConfigManager.ApplyConfigToOptions(m.SerialNumber, inputOptions, inputSource);
                    DebugLogger.Log($"  Filtered options count: {filteredOptions.Count}");

                    // 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) });

                    DebugLogger.Log($"  Monitor {m.MonitorName} processing complete");
                }

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

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

        // Stop spinner and timer
        _spinnerStoryboard?.Stop(this);
        _showLogButtonTimer?.Stop();

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

        DebugLogger.Log("LoadMonitors complete, UI updated");

        Dispatcher.BeginInvoke(new Action(() =>
        {
            var workArea = SystemParameters.WorkArea;
            Top = workArea.Bottom - ActualHeight - 10;
        }), 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)
    {
        DebugLogger.Log($"  CreateInputRow: currentInput={currentInput}, optionCount={options.Count}");
        foreach (var opt in options)
            DebugLogger.Log($"    Option: Value={opt.Value}, Name={opt.Name}");

        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);
            DebugLogger.Log($"    Selection: Looking for Value={currentInput.Value}, found at index={index}");
            if (index >= 0)
                combo.SelectedIndex = index;
        }
        else
        {
            DebugLogger.Log($"    Selection: currentInput is null, no selection");
        }

        // 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 isUnsupported = string.IsNullOrEmpty(status) || status == "Unknown";

        var btn = new Button
        {
            Content = isUnsupported ? "Power Unsupported" : status,
            Width = 170,
            Tag = serialNumber,
            Style = (Style)FindResource("DarkButton"),
            IsEnabled = !isUnsupported
        };

        if (!isUnsupported)
        {
            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;
    }
}