// Copyright (c) Microsoft Corporation
// The Microsoft Corporation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.

using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text.Json;
using System.Threading;
using System.Threading.Tasks;
using System.Windows;

using global::PowerToys.GPOWrapper;
using ManagedCommon;
using Microsoft.PowerToys.Settings.UI.Helpers;
using Microsoft.PowerToys.Settings.UI.Library;
using Microsoft.PowerToys.Settings.UI.Library.Helpers;
using Microsoft.PowerToys.Settings.UI.Library.Interfaces;
using Microsoft.PowerToys.Settings.UI.Library.ViewModels.Commands;
using Microsoft.PowerToys.Settings.UI.SerializationContext;
using Microsoft.PowerToys.Settings.UI.Services;
using PowerToys.Interop;

namespace Microsoft.PowerToys.Settings.UI.ViewModels
{
    public partial class PowerDisplayViewModel : PageViewModelBase
    {
        private static readonly JsonSerializerOptions _jsonSerializerOptions = new JsonSerializerOptions { WriteIndented = true };

        protected override string ModuleName => PowerDisplaySettings.ModuleName;

        private GeneralSettings GeneralSettingsConfig { get; set; }

        private ISettingsUtils SettingsUtils { get; set; }

        public ButtonClickCommand LaunchEventHandler => new ButtonClickCommand(Launch);

        public PowerDisplayViewModel(ISettingsUtils settingsUtils, ISettingsRepository<GeneralSettings> settingsRepository, ISettingsRepository<PowerDisplaySettings> powerDisplaySettingsRepository, Func<string, int> ipcMSGCallBackFunc)
        {
            // To obtain the general settings configurations of PowerToys Settings.
            ArgumentNullException.ThrowIfNull(settingsRepository);

            SettingsUtils = settingsUtils;
            GeneralSettingsConfig = settingsRepository.SettingsConfig;

            _settings = powerDisplaySettingsRepository.SettingsConfig;

            InitializeEnabledValue();

            // Initialize monitors collection using property setter for proper subscription setup
            // Parse capabilities for each loaded monitor to ensure UI displays correctly
            var loadedMonitors = _settings.Properties.Monitors;

            Logger.LogInfo($"[Constructor] Initializing with {loadedMonitors.Count} monitors from settings");

            foreach (var monitor in loadedMonitors)
            {
                // Parse capabilities to determine feature support
                ParseFeatureSupportFromCapabilities(monitor);
            }

            Monitors = new ObservableCollection<MonitorInfo>(loadedMonitors);

            // set the callback functions value to handle outgoing IPC message.
            SendConfigMSG = ipcMSGCallBackFunc;

            // Load profiles
            LoadProfiles();

            // Listen for monitor refresh events from PowerDisplay.exe
            NativeEventWaiter.WaitForEventLoop(
                Constants.RefreshPowerDisplayMonitorsEvent(),
                () =>
                {
                    Logger.LogInfo("Received refresh monitors event from PowerDisplay.exe");
                    ReloadMonitorsFromSettings();
                });
        }

        private void InitializeEnabledValue()
        {
            _isEnabled = GeneralSettingsConfig.Enabled.PowerDisplay;
        }

        public bool IsEnabled
        {
            get => _isEnabled;
            set
            {
                if (_isEnabled != value)
                {
                    _isEnabled = value;
                    OnPropertyChanged(nameof(IsEnabled));

                    GeneralSettingsConfig.Enabled.PowerDisplay = value;
                    OutGoingGeneralSettings outgoing = new OutGoingGeneralSettings(GeneralSettingsConfig);
                    SendConfigMSG(outgoing.ToString());
                }
            }
        }

        public bool RestoreSettingsOnStartup
        {
            get => _settings.Properties.RestoreSettingsOnStartup;
            set => SetSettingsProperty(_settings.Properties.RestoreSettingsOnStartup, value, v => _settings.Properties.RestoreSettingsOnStartup = v);
        }

        public HotkeySettings ActivationShortcut
        {
            get => _settings.Properties.ActivationShortcut;
            set => SetSettingsProperty(_settings.Properties.ActivationShortcut, value, v => _settings.Properties.ActivationShortcut = v);
        }

        public string BrightnessUpdateRate
        {
            get => _settings.Properties.BrightnessUpdateRate;
            set => SetSettingsProperty(_settings.Properties.BrightnessUpdateRate, value, v => _settings.Properties.BrightnessUpdateRate = v);
        }

        private readonly List<string> _brightnessUpdateRateOptions = new List<string>
        {
            "never",
            "250ms",
            "500ms",
            "1s",
            "2s",
        };

        public List<string> BrightnessUpdateRateOptions => _brightnessUpdateRateOptions;

        public ObservableCollection<MonitorInfo> Monitors
        {
            get => _monitors;
            set
            {
                if (_monitors != null)
                {
                    _monitors.CollectionChanged -= Monitors_CollectionChanged;
                    UnsubscribeFromItemPropertyChanged(_monitors);
                }

                _monitors = value;

                if (_monitors != null)
                {
                    _monitors.CollectionChanged += Monitors_CollectionChanged;
                    SubscribeToItemPropertyChanged(_monitors);
                }

                OnPropertyChanged(nameof(Monitors));
                HasMonitors = _monitors?.Count > 0;
            }
        }

        public bool HasMonitors
        {
            get => _hasMonitors;
            set
            {
                if (_hasMonitors != value)
                {
                    _hasMonitors = value;
                    OnPropertyChanged();
                }
            }
        }

        private void Monitors_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
        {
            SubscribeToItemPropertyChanged(e.NewItems?.Cast<MonitorInfo>());
            UnsubscribeFromItemPropertyChanged(e.OldItems?.Cast<MonitorInfo>());

            HasMonitors = _monitors.Count > 0;
            _settings.Properties.Monitors = _monitors.ToList();
            NotifySettingsChanged();
        }

        public void UpdateMonitors(MonitorInfo[] monitors)
        {
            if (monitors == null)
            {
                Monitors = new ObservableCollection<MonitorInfo>();
                return;
            }

            // Create a lookup of existing monitors to preserve user settings
            var existingMonitors = _monitors.ToDictionary(m => GetMonitorKey(m), m => m);

            // Create new collection with merged settings
            var newCollection = new ObservableCollection<MonitorInfo>();
            foreach (var newMonitor in monitors)
            {
                var monitorKey = GetMonitorKey(newMonitor);

                // Parse capabilities to determine feature support
                ParseFeatureSupportFromCapabilities(newMonitor);

                // Check if we have an existing monitor with the same key
                if (existingMonitors.TryGetValue(monitorKey, out var existingMonitor))
                {
                    // Preserve user settings from existing monitor
                    newMonitor.EnableContrast = existingMonitor.EnableContrast;
                    newMonitor.EnableVolume = existingMonitor.EnableVolume;
                    newMonitor.IsHidden = existingMonitor.IsHidden;
                }

                newCollection.Add(newMonitor);
            }

            // Replace collection - property setter handles subscription management
            Monitors = newCollection;
        }

        /// <summary>
        /// Generate a unique key for monitor matching based on hardware ID and internal name
        /// </summary>
        private string GetMonitorKey(MonitorInfo monitor)
        {
            // Use hardware ID if available, otherwise fall back to internal name
            if (!string.IsNullOrEmpty(monitor.HardwareId))
            {
                return monitor.HardwareId;
            }

            return monitor.InternalName ?? monitor.Name ?? string.Empty;
        }

        /// <summary>
        /// Parse feature support from capabilities VcpCodes list
        /// Sets support flags based on VCP code presence
        /// </summary>
        private void ParseFeatureSupportFromCapabilities(MonitorInfo monitor)
        {
            if (monitor == null)
            {
                return;
            }

            // Check capabilities status
            if (string.IsNullOrEmpty(monitor.CapabilitiesRaw))
            {
                monitor.CapabilitiesStatus = "unavailable";
                monitor.SupportsBrightness = false;
                monitor.SupportsContrast = false;
                monitor.SupportsColorTemperature = false;
                monitor.SupportsVolume = false;
                return;
            }

            monitor.CapabilitiesStatus = "available";

            // Parse VCP codes to determine feature support
            // VCP codes are stored as hex strings (e.g., "0x10", "10")
            var vcpCodes = monitor.VcpCodes ?? new List<string>();

            // Convert all VCP codes to integers for comparison
            var vcpCodeInts = new HashSet<int>();
            foreach (var code in vcpCodes)
            {
                if (int.TryParse(code.Replace("0x", string.Empty), System.Globalization.NumberStyles.HexNumber, null, out int codeInt))
                {
                    vcpCodeInts.Add(codeInt);
                }
            }

            // Check for feature support based on VCP codes
            // 0x10 (16): Brightness
            // 0x12 (18): Contrast
            // 0x14 (20): Color Temperature (Select Color Preset)
            // 0x62 (98): Volume
            monitor.SupportsBrightness = vcpCodeInts.Contains(0x10);
            monitor.SupportsContrast = vcpCodeInts.Contains(0x12);
            monitor.SupportsColorTemperature = vcpCodeInts.Contains(0x14);
            monitor.SupportsVolume = vcpCodeInts.Contains(0x62);
        }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Usage", "CA1816:Dispose methods should call SuppressFinalize", Justification = "Base class PageViewModelBase.Dispose() handles GC.SuppressFinalize")]
        public override void Dispose()
        {
            // Unsubscribe from monitor property changes
            UnsubscribeFromItemPropertyChanged(_monitors);

            // Unsubscribe from collection changes
            if (_monitors != null)
            {
                _monitors.CollectionChanged -= Monitors_CollectionChanged;
            }

            _cancellationTokenSource.Cancel();
            _cancellationTokenSource.Dispose();
            GC.SuppressFinalize(this);

            base.Dispose();
        }

        /// <summary>
        /// Subscribe to PropertyChanged events for items in the collection
        /// </summary>
        private void SubscribeToItemPropertyChanged(IEnumerable<MonitorInfo> items)
        {
            if (items != null)
            {
                foreach (var item in items)
                {
                    item.PropertyChanged += OnMonitorPropertyChanged;
                }
            }
        }

        /// <summary>
        /// Unsubscribe from PropertyChanged events for items in the collection
        /// </summary>
        private void UnsubscribeFromItemPropertyChanged(IEnumerable<MonitorInfo> items)
        {
            if (items != null)
            {
                foreach (var item in items)
                {
                    item.PropertyChanged -= OnMonitorPropertyChanged;
                }
            }
        }

        /// <summary>
        /// Handle PropertyChanged events from MonitorInfo objects
        /// </summary>
        private void OnMonitorPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
        {
            if (sender is MonitorInfo monitor)
            {
                System.Diagnostics.Debug.WriteLine($"[PowerDisplayViewModel] Monitor {monitor.Name} property {e.PropertyName} changed");
            }

            // Update the settings object to keep it in sync
            _settings.Properties.Monitors = _monitors.ToList();

            // Save settings when any monitor property changes
            NotifySettingsChanged();
        }

        public void Launch()
        {
            var actionMessage = new PowerDisplayActionMessage
            {
                Action = new PowerDisplayActionMessage.ActionData
                {
                    PowerDisplay = new PowerDisplayActionMessage.PowerDisplayAction
                    {
                        ActionName = "Launch",
                        Value = string.Empty,
                    },
                },
            };

            SendConfigMSG(JsonSerializer.Serialize(actionMessage));
        }

        /// <summary>
        /// Trigger PowerDisplay.exe to apply color temperature to a specific monitor
        /// Called after user confirms color temperature change in Settings UI
        /// </summary>
        /// <param name="monitorInternalName">Internal name (ID) of the monitor</param>
        /// <param name="colorTemperature">Color temperature value to apply</param>
        public void ApplyColorTemperatureToMonitor(string monitorInternalName, int colorTemperature)
        {
            // Set the pending operation in settings
            _settings.Properties.PendingColorTemperatureOperation = new ColorTemperatureOperation
            {
                MonitorId = monitorInternalName,
                ColorTemperature = colorTemperature,
            };

            // Save settings to persist the operation
            SettingsUtils.SaveSettings(_settings.ToJsonString(), PowerDisplaySettings.ModuleName);

            // Send IPC message to trigger PowerDisplay to process the operation
            var actionMessage = new PowerDisplayActionMessage
            {
                Action = new PowerDisplayActionMessage.ActionData
                {
                    PowerDisplay = new PowerDisplayActionMessage.PowerDisplayAction
                    {
                        ActionName = "ApplyColorTemperature",
                        Value = string.Empty,
                        MonitorId = monitorInternalName,
                        ColorTemperature = colorTemperature,
                    },
                },
            };

            SendConfigMSG(JsonSerializer.Serialize(actionMessage));
        }

        /// <summary>
        /// Reload monitor list from settings file (called when PowerDisplay.exe signals monitor changes)
        /// </summary>
        private void ReloadMonitorsFromSettings()
        {
            try
            {
                Logger.LogInfo("Reloading monitors from settings file");

                // Read fresh settings from file
                var updatedSettings = SettingsUtils.GetSettingsOrDefault<PowerDisplaySettings>(PowerDisplaySettings.ModuleName);
                var updatedMonitors = updatedSettings.Properties.Monitors;

                Logger.LogInfo($"[ReloadMonitors] Loaded {updatedMonitors.Count} monitors from settings");

                // Parse capabilities for each monitor
                foreach (var monitor in updatedMonitors)
                {
                    ParseFeatureSupportFromCapabilities(monitor);
                }

                // Update existing MonitorInfo objects instead of replacing the collection
                // This preserves XAML x:Bind bindings which reference specific object instances
                if (Monitors == null)
                {
                    // First time initialization - create new collection
                    Monitors = new ObservableCollection<MonitorInfo>(updatedMonitors);
                }
                else
                {
                    // Create a dictionary for quick lookup by InternalName
                    var updatedMonitorsDict = updatedMonitors.ToDictionary(m => m.InternalName, m => m);

                    // Update existing monitors or remove ones that no longer exist
                    for (int i = Monitors.Count - 1; i >= 0; i--)
                    {
                        var existingMonitor = Monitors[i];
                        if (updatedMonitorsDict.TryGetValue(existingMonitor.InternalName, out var updatedMonitor))
                        {
                            // Monitor still exists - update its properties in place
                            Logger.LogInfo($"[ReloadMonitors] Updating existing monitor: {existingMonitor.InternalName}");
                            existingMonitor.UpdateFrom(updatedMonitor);
                            updatedMonitorsDict.Remove(existingMonitor.InternalName);
                        }
                        else
                        {
                            // Monitor no longer exists - remove from collection
                            Logger.LogInfo($"[ReloadMonitors] Removing monitor: {existingMonitor.InternalName}");
                            Monitors.RemoveAt(i);
                        }
                    }

                    // Add any new monitors that weren't in the existing collection
                    foreach (var newMonitor in updatedMonitorsDict.Values)
                    {
                        Logger.LogInfo($"[ReloadMonitors] Adding new monitor: {newMonitor.InternalName}");
                        Monitors.Add(newMonitor);
                    }
                }

                // Update internal settings reference
                _settings.Properties.Monitors = updatedMonitors;

                Logger.LogInfo($"Successfully reloaded {updatedMonitors.Count} monitors");
            }
            catch (Exception ex)
            {
                Logger.LogError($"Failed to reload monitors from settings: {ex.Message}");
            }
        }

        private Func<string, int> SendConfigMSG { get; }

        private bool _isEnabled;
        private PowerDisplaySettings _settings;
        private ObservableCollection<MonitorInfo> _monitors;
        private bool _hasMonitors;
        private CancellationTokenSource _cancellationTokenSource = new CancellationTokenSource();

        // Profile-related fields
        private ObservableCollection<string> _profiles = new ObservableCollection<string>();
        private string _selectedProfile = PowerDisplayProfiles.CustomProfileName;
        private string _currentProfile = PowerDisplayProfiles.CustomProfileName;
        private string _profilesFilePath = string.Empty;

        /// <summary>
        /// Collection of available profile names (including Custom)
        /// </summary>
        public ObservableCollection<string> Profiles
        {
            get => _profiles;
            set
            {
                if (_profiles != value)
                {
                    _profiles = value;
                    OnPropertyChanged();
                }
            }
        }

        /// <summary>
        /// Currently selected profile in the ComboBox
        /// </summary>
        public string SelectedProfile
        {
            get => _selectedProfile;
            set
            {
                if (_selectedProfile != value && !string.IsNullOrEmpty(value))
                {
                    _selectedProfile = value;
                    OnPropertyChanged();

                    // Apply the selected profile
                    ApplyProfile(value);
                }
            }
        }

        /// <summary>
        /// Currently active profile (read from settings, may differ from selected during transition)
        /// </summary>
        public string CurrentProfile
        {
            get => _currentProfile;
            set
            {
                if (_currentProfile != value)
                {
                    _currentProfile = value;
                    OnPropertyChanged();
                    OnPropertyChanged(nameof(IsCustomProfile));
                }
            }
        }

        /// <summary>
        /// True if current profile is Custom
        /// </summary>
        public bool IsCustomProfile => _currentProfile?.Equals(PowerDisplayProfiles.CustomProfileName, StringComparison.OrdinalIgnoreCase) ?? true;

        /// <summary>
        /// True if a non-Custom profile is selected (enables delete/rename)
        /// </summary>
        public bool CanModifySelectedProfile => !string.IsNullOrEmpty(_selectedProfile) &&
                                                  !_selectedProfile.Equals(PowerDisplayProfiles.CustomProfileName, StringComparison.OrdinalIgnoreCase);

        public ButtonClickCommand AddProfileCommand => new ButtonClickCommand(AddProfile);

        public ButtonClickCommand DeleteProfileCommand => new ButtonClickCommand(DeleteProfile);

        public ButtonClickCommand RenameProfileCommand => new ButtonClickCommand(RenameProfile);

        public ButtonClickCommand SaveAsProfileCommand => new ButtonClickCommand(SaveAsProfile);

        public void RefreshEnabledState()
        {
            InitializeEnabledValue();
            OnPropertyChanged(nameof(IsEnabled));
        }

        private bool SetSettingsProperty<T>(T currentValue, T newValue, Action<T> setter, [CallerMemberName] string propertyName = null)
        {
            if (EqualityComparer<T>.Default.Equals(currentValue, newValue))
            {
                return false;
            }

            setter(newValue);
            OnPropertyChanged(propertyName);
            NotifySettingsChanged();
            return true;
        }

        /// <summary>
        /// Load profiles from disk
        /// </summary>
        private void LoadProfiles()
        {
            try
            {
                var settingsPath = Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData);
                var powerToysPath = Path.Combine(settingsPath, "Microsoft", "PowerToys", "PowerDisplay");
                _profilesFilePath = Path.Combine(powerToysPath, "profiles.json");

                var profilesData = LoadProfilesFromDisk();

                // Build profile names list
                var profileNames = new List<string> { PowerDisplayProfiles.CustomProfileName };
                profileNames.AddRange(profilesData.Profiles.Select(p => p.Name));

                Profiles = new ObservableCollection<string>(profileNames);

                // Set current profile from settings
                CurrentProfile = _settings.Properties.CurrentProfile ?? PowerDisplayProfiles.CustomProfileName;
                _selectedProfile = CurrentProfile;
                OnPropertyChanged(nameof(SelectedProfile));

                Logger.LogInfo($"Loaded {profilesData.Profiles.Count} profiles, current: {CurrentProfile}");
            }
            catch (Exception ex)
            {
                Logger.LogError($"Failed to load profiles: {ex.Message}");
                Profiles = new ObservableCollection<string> { PowerDisplayProfiles.CustomProfileName };
                CurrentProfile = PowerDisplayProfiles.CustomProfileName;
            }
        }

        /// <summary>
        /// Load profiles data from disk
        /// </summary>
        private PowerDisplayProfiles LoadProfilesFromDisk()
        {
            if (File.Exists(_profilesFilePath))
            {
                var json = File.ReadAllText(_profilesFilePath);
                var profiles = JsonSerializer.Deserialize<PowerDisplayProfiles>(json);
                return profiles ?? new PowerDisplayProfiles();
            }

            return new PowerDisplayProfiles();
        }

        /// <summary>
        /// Save profiles data to disk
        /// </summary>
        private void SaveProfilesToDisk(PowerDisplayProfiles profiles)
        {
            try
            {
                profiles.LastUpdated = DateTime.UtcNow;
                var json = JsonSerializer.Serialize(profiles, _jsonSerializerOptions);
                File.WriteAllText(_profilesFilePath, json);
                Logger.LogInfo($"Saved profiles to disk: {_profilesFilePath}");
            }
            catch (Exception ex)
            {
                Logger.LogError($"Failed to save profiles: {ex.Message}");
            }
        }

        /// <summary>
        /// Apply a profile
        /// </summary>
        private void ApplyProfile(string profileName)
        {
            try
            {
                Logger.LogInfo($"Applying profile: {profileName}");

                var profilesData = LoadProfilesFromDisk();
                var profile = profilesData.GetProfile(profileName);

                if (profile == null || !profile.IsValid())
                {
                    Logger.LogWarning($"Profile '{profileName}' not found or invalid");
                    return;
                }

                // Create pending operation
                var operation = new ProfileOperation(profileName, profile.MonitorSettings);
                _settings.Properties.PendingProfileOperation = operation;
                _settings.Properties.CurrentProfile = profileName;

                // Save settings
                NotifySettingsChanged();

                // Update current profile
                CurrentProfile = profileName;

                // Send custom action to trigger profile application
                SendConfigMSG(
                    string.Format(
                        CultureInfo.InvariantCulture,
                        "{{ \"action\": {{ \"PowerDisplay\": {{ \"action_name\": \"ApplyProfile\", \"value\": \"{0}\" }} }} }}",
                        profileName));

                // Signal PowerDisplay to apply profile
                using (var eventHandle = new System.Threading.EventWaitHandle(
                    false,
                    System.Threading.EventResetMode.AutoReset,
                    Constants.ApplyProfilePowerDisplayEvent()))
                {
                    eventHandle.Set();
                }

                Logger.LogInfo($"Profile '{profileName}' applied successfully");
            }
            catch (Exception ex)
            {
                Logger.LogError($"Failed to apply profile: {ex.Message}");
            }
        }

        /// <summary>
        /// Add a new profile
        /// </summary>
        private async void AddProfile()
        {
            try
            {
                Logger.LogInfo("Adding new profile");

                if (Monitors == null || Monitors.Count == 0)
                {
                    Logger.LogWarning("No monitors available to create profile");
                    return;
                }

                var profilesData = LoadProfilesFromDisk();
                var defaultName = profilesData.GenerateProfileName();

                // Show profile editor dialog
                var dialog = new Views.ProfileEditorDialog(Monitors, defaultName);
                var result = await dialog.ShowAsync();

                if (result == Microsoft.UI.Xaml.Controls.ContentDialogResult.Primary && dialog.ResultProfile != null)
                {
                    var newProfile = dialog.ResultProfile;

                    // Validate profile name
                    if (string.IsNullOrWhiteSpace(newProfile.Name))
                    {
                        newProfile = new PowerDisplayProfile(defaultName, newProfile.MonitorSettings);
                    }

                    profilesData.SetProfile(newProfile);
                    SaveProfilesToDisk(profilesData);

                    // Reload profile list
                    LoadProfiles();

                    Logger.LogInfo($"Profile '{newProfile.Name}' created successfully");
                }
            }
            catch (Exception ex)
            {
                Logger.LogError($"Failed to add profile: {ex.Message}");
            }
        }

        /// <summary>
        /// Delete the selected profile
        /// </summary>
        private void DeleteProfile()
        {
            try
            {
                if (!CanModifySelectedProfile)
                {
                    return;
                }

                Logger.LogInfo($"Deleting profile: {SelectedProfile}");

                var profilesData = LoadProfilesFromDisk();
                profilesData.RemoveProfile(SelectedProfile);
                SaveProfilesToDisk(profilesData);

                // Reload profile list
                LoadProfiles();

                Logger.LogInfo($"Profile '{SelectedProfile}' deleted successfully");
            }
            catch (Exception ex)
            {
                Logger.LogError($"Failed to delete profile: {ex.Message}");
            }
        }

        /// <summary>
        /// Rename the selected profile
        /// </summary>
        private async void RenameProfile()
        {
            try
            {
                if (!CanModifySelectedProfile)
                {
                    return;
                }

                Logger.LogInfo($"Renaming profile: {SelectedProfile}");

                // Load the existing profile
                var profilesData = LoadProfilesFromDisk();
                var existingProfile = profilesData.GetProfile(SelectedProfile);
                if (existingProfile == null)
                {
                    Logger.LogWarning($"Profile '{SelectedProfile}' not found");
                    return;
                }

                // Show profile editor dialog with existing profile data
                var dialog = new Views.ProfileEditorDialog(Monitors, existingProfile.Name);

                // Pre-fill monitor settings from existing profile
                foreach (var monitorSetting in existingProfile.MonitorSettings)
                {
                    var monitorItem = dialog.ViewModel.Monitors.FirstOrDefault(m => m.Monitor.HardwareId == monitorSetting.HardwareId);
                    if (monitorItem != null)
                    {
                        monitorItem.IsSelected = true;
                        monitorItem.Brightness = monitorSetting.Brightness;
                        monitorItem.ColorTemperature = monitorSetting.ColorTemperature;
                        if (monitorSetting.Contrast.HasValue)
                        {
                            monitorItem.Contrast = monitorSetting.Contrast.Value;
                        }

                        if (monitorSetting.Volume.HasValue)
                        {
                            monitorItem.Volume = monitorSetting.Volume.Value;
                        }
                    }
                }

                var result = await dialog.ShowAsync();

                if (result == Microsoft.UI.Xaml.Controls.ContentDialogResult.Primary && dialog.ResultProfile != null)
                {
                    var updatedProfile = dialog.ResultProfile;

                    // Remove old profile and add updated one
                    profilesData.RemoveProfile(SelectedProfile);
                    profilesData.SetProfile(updatedProfile);
                    SaveProfilesToDisk(profilesData);

                    // Reload profile list
                    LoadProfiles();

                    // Select the renamed profile
                    SelectedProfile = updatedProfile.Name;

                    Logger.LogInfo($"Profile renamed to '{updatedProfile.Name}' successfully");
                }
            }
            catch (Exception ex)
            {
                Logger.LogError($"Failed to rename profile: {ex.Message}");
            }
        }

        /// <summary>
        /// Save current settings as a new profile
        /// </summary>
        private void SaveAsProfile()
        {
            try
            {
                Logger.LogInfo("Saving current settings as new profile");

                var profilesData = LoadProfilesFromDisk();
                var newProfileName = profilesData.GenerateProfileName();

                // Collect current monitor settings
                var monitorSettings = new List<ProfileMonitorSetting>();
                foreach (var monitor in Monitors)
                {
                    var setting = new ProfileMonitorSetting(
                        monitor.HardwareId,
                        monitor.CurrentBrightness,
                        monitor.ColorTemperature,
                        monitor.EnableContrast ? (int?)50 : null,
                        monitor.EnableVolume ? (int?)50 : null);

                    monitorSettings.Add(setting);
                }

                if (monitorSettings.Count == 0)
                {
                    Logger.LogWarning("No monitors available to save profile");
                    return;
                }

                var newProfile = new PowerDisplayProfile(newProfileName, monitorSettings);
                profilesData.SetProfile(newProfile);
                SaveProfilesToDisk(profilesData);

                // Reload profile list and select the new profile
                LoadProfiles();
                SelectedProfile = newProfileName;

                Logger.LogInfo($"Saved as profile '{newProfileName}' successfully");
            }
            catch (Exception ex)
            {
                Logger.LogError($"Failed to save as profile: {ex.Message}");
            }
        }

        private void NotifySettingsChanged()
        {
            // Persist locally first so settings survive even if the module DLL isn't loaded yet.
            SettingsUtils.SaveSettings(_settings.ToJsonString(), PowerDisplaySettings.ModuleName);

            // Using InvariantCulture as this is an IPC message
            // This message will be intercepted by the runner, which passes the serialized JSON to
            // PowerDisplay Module Interface's set_config() method, which then applies it in-process.
            SendConfigMSG(
                   string.Format(
                       CultureInfo.InvariantCulture,
                       "{{ \"powertoys\": {{ \"{0}\": {1} }} }}",
                       PowerDisplaySettings.ModuleName,
                       JsonSerializer.Serialize(_settings, SourceGenerationContextContext.Default.PowerDisplaySettings)));
        }
    }
}