using System.Windows.Controls;
using System.Windows;
using CMM.Library.ViewModel;
using CMM.Library.Method;
using CMM.Language;
using System;
using System.Collections.Generic;
using System.Threading.Tasks;

namespace CMM.Management.Control
{
    /// <summary>
    /// Single monitor control
    /// </summary>
    internal class MonCtrl : System.Windows.Controls.Control
    {
        public static readonly DependencyProperty MonProperty;
        private StackPanel _sp;

        static MonCtrl()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(MonCtrl), new FrameworkPropertyMetadata(typeof(MonCtrl)));

            MonProperty = DependencyProperty.Register(
                "Monitor",
                typeof(XMonitor),
                typeof(MonCtrl),
                new FrameworkPropertyMetadata(null, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, OnMonChangedCallback));
        }

        public override void OnApplyTemplate()
        {
            _sp = Template.FindName("sp", this) as StackPanel;
            if (_sp != null && Mon != null)
            {
                _ = LoadControlsAsync();
            }
        }

        public XMonitor Mon
        {
            get => (XMonitor)GetValue(MonProperty);
            set => SetValue(MonProperty, value);
        }

        static void OnMonChangedCallback(DependencyObject sender, DependencyPropertyChangedEventArgs args)
        {
            var me = sender as MonCtrl;
            if (me != null)
            {
                me.OnMonChanged((XMonitor)args.NewValue);
            }
        }

        public virtual void OnMonChanged(XMonitor value)
        {
            if (_sp != null && value != null)
            {
                _ = LoadControlsAsync();
            }
        }

        private async Task LoadControlsAsync()
        {
            if (_sp == null || Mon == null) return;

            _sp.Children.Clear();

            var brightness = await CMMCommand.GetBrightness(Mon.SerialNumber);
            var contrast = await CMMCommand.GetContrast(Mon.SerialNumber);
            var inputSource = await CMMCommand.GetInputSource(Mon.SerialNumber);
            var inputOptions = await CMMCommand.GetInputSourceOptions(Mon.SerialNumber);
            var powerStatus = await CMMCommand.GetMonPowerStatus(Mon.SerialNumber);

            // Brightness slider
            var brightnessPanel = CreateSliderControl(
                Lang.Find("Brightness"),
                brightness ?? 50,
                Mon.SerialNumber,
                async (sn, value) => await CMMCommand.SetBrightness(sn, value));
            _sp.Children.Add(brightnessPanel);

            // Contrast slider
            var contrastPanel = CreateSliderControl(
                Lang.Find("Contrast"),
                contrast ?? 50,
                Mon.SerialNumber,
                async (sn, value) => await CMMCommand.SetContrast(sn, value));
            _sp.Children.Add(contrastPanel);

            // Input source dropdown
            if (inputOptions.Count > 0)
            {
                var inputPanel = CreateInputSourceControl(
                    Mon.SerialNumber,
                    inputSource,
                    inputOptions);
                _sp.Children.Add(inputPanel);
            }

            // Power button
            var powerPanel = CreatePowerControl(Mon.SerialNumber, powerStatus);
            _sp.Children.Add(powerPanel);
        }

        private StackPanel CreateSliderControl(
            string label,
            int currentValue,
            string monitorSN,
            Func<string, int, Task> onValueChanged)
        {
            var panel = new StackPanel
            {
                Orientation = Orientation.Horizontal,
                Margin = new Thickness(0, 5, 0, 5)
            };

            var labelBlock = new TextBlock
            {
                Text = label,
                Width = 100,
                VerticalAlignment = VerticalAlignment.Center,
                Foreground = System.Windows.Media.Brushes.White
            };

            var slider = new Slider
            {
                Style = (Style)FindResource("Horizontal_Slider"),
                Minimum = 0,
                Maximum = 100,
                Value = currentValue,
                Tag = monitorSN,
                Width = 200
            };

            var valueBlock = new TextBlock
            {
                Text = currentValue.ToString(),
                Width = 40,
                VerticalAlignment = VerticalAlignment.Center,
                Foreground = System.Windows.Media.Brushes.White,
                TextAlignment = TextAlignment.Right
            };

            // Update value display while dragging
            slider.ValueChanged += (s, e) =>
            {
                valueBlock.Text = ((int)e.NewValue).ToString();
            };

            // Only send command on release (PreviewMouseUp)
            slider.PreviewMouseUp += async (s, e) =>
            {
                var sld = s as Slider;
                var sn = sld?.Tag?.ToString();
                if (!string.IsNullOrEmpty(sn))
                {
                    await onValueChanged(sn, (int)sld.Value);
                }
            };

            panel.Children.Add(labelBlock);
            panel.Children.Add(slider);
            panel.Children.Add(valueBlock);

            return panel;
        }

        private StackPanel CreateInputSourceControl(
            string monitorSN,
            int? currentInputSource,
            List<InputSourceOption> options)
        {
            var panel = new StackPanel
            {
                Orientation = Orientation.Horizontal,
                Margin = new Thickness(0, 5, 0, 5)
            };

            var labelBlock = new TextBlock
            {
                Text = Lang.Find("InputSource"),
                Width = 100,
                VerticalAlignment = VerticalAlignment.Center,
                Foreground = System.Windows.Media.Brushes.White
            };

            var comboBox = new ComboBox
            {
                Width = 200,
                Tag = monitorSN,
                ItemsSource = options,
                DisplayMemberPath = "Name"
            };

            // Set current selection
            if (currentInputSource.HasValue)
            {
                var currentOption = options.Find(o => o.Value == currentInputSource.Value);
                if (currentOption != null)
                {
                    comboBox.SelectedItem = currentOption;
                }
            }

            comboBox.SelectionChanged += async (s, e) =>
            {
                var cb = s as ComboBox;
                var sn = cb?.Tag?.ToString();
                var selectedOption = cb?.SelectedItem as InputSourceOption;

                if (!string.IsNullOrEmpty(sn) && selectedOption != null)
                {
                    await CMMCommand.SetInputSource(sn, selectedOption.Value);
                }
            };

            panel.Children.Add(labelBlock);
            panel.Children.Add(comboBox);

            return panel;
        }

        private StackPanel CreatePowerControl(string monitorSN, string powerStatus)
        {
            var panel = new StackPanel
            {
                Orientation = Orientation.Horizontal,
                Margin = new Thickness(0, 10, 0, 0)
            };

            var labelBlock = new TextBlock
            {
                Text = Lang.Find("Power"),
                Width = 100,
                VerticalAlignment = VerticalAlignment.Center,
                Foreground = System.Windows.Media.Brushes.White
            };

            var btn = new Button
            {
                Tag = monitorSN,
                Content = GetLocalizedPowerStatus(powerStatus),
                Width = 200,
                Height = 30
            };

            btn.Click += async (s, e) => await TogglePower(s, e);

            panel.Children.Add(labelBlock);
            panel.Children.Add(btn);

            return panel;
        }

        private string GetLocalizedPowerStatus(string status)
        {
            return status switch
            {
                "PowerOn" => Lang.Find("PowerOn"),
                "Sleep" => Lang.Find("Sleep"),
                "PowerOff" => Lang.Find("PowerOff"),
                _ => status
            };
        }

        private async Task TogglePower(object sender, RoutedEventArgs e)
        {
            var btn = sender as Button;
            var tag = btn?.Tag?.ToString();
            if (string.IsNullOrEmpty(tag)) return;

            var currentStatus = await CMMCommand.GetMonPowerStatus(tag);

            if (currentStatus == "Sleep" || currentStatus == "PowerOff")
            {
                await CMMCommand.PowerOn(tag);
            }
            else
            {
                await CMMCommand.Sleep(tag);
            }

            await Task.Delay(1000);
            var newStatus = await CMMCommand.GetMonPowerStatus(tag);
            btn!.Content = GetLocalizedPowerStatus(newStatus);
        }
    }
}