using System;
using ChrisKaczor.Wpf.Validation;
using HardwareMonitorStatusWindow.Service;
using System.Linq;
using System.Threading.Tasks;
using System.Timers;
using System.Windows;
using System.Windows.Threading;

namespace HardwareMonitorStatusWindow.StatusWindow.SettingsWindow;

public partial class SensorWindow
{
    private readonly DispatcherTimer _timer = new();

    public SensorWindow()
    {
        InitializeComponent();
    }

    public async Task<bool?> Display(SensorEntry sensorEntry, Window? owner)
    {
        DataContext = sensorEntry;

        await Data.RefreshComputer();

        HardwareTypeComboBox.ItemsSource = Data.ComputerHardware.Where(h => h.Sensors.Any()).DistinctBy(h => h.Type).Select(s => new HardwareTypeItem(s.Type)).OrderBy(s => s.Name);

        var hardware = Data.ComputerHardware.FirstOrDefault(h => h.Identifier.ToString() == sensorEntry.HardwareId);
        var sensor = hardware?.Sensors.FirstOrDefault(s => s.Identifier.ToString() == sensorEntry.SensorId);

        HardwareTypeComboBox.SelectedValue = hardware?.Type;
        HardwareComboBox.SelectedItem = hardware;
        SensorTypeComboBox.SelectedValue = sensor?.Type;
        SensorComboBox.SelectedItem = sensor;

        Title = string.IsNullOrWhiteSpace(sensorEntry.Label) ? StatusWindow.Resources.SensorWindowAdd : StatusWindow.Resources.SensorWindowEdit;

        Owner = owner;

        _timer.Interval = TimeSpan.FromSeconds(1);
        _timer.Tick += TimerOnTick;
        _timer.Start();

        return ShowDialog();
    }

    private void TimerOnTick(object? sender, EventArgs e)
    {
        UpdateCurrentSensorValue();
    }

    private void HandleOkayButtonClick(object sender, RoutedEventArgs e)
    {
        if (!this.IsValid())
            return;

        var sensorEntry = (SensorEntry)DataContext;

        var hardware = (Hardware)HardwareComboBox.SelectedItem;
        sensorEntry.HardwareId = hardware.Identifier;

        var sensor = (Sensor)SensorComboBox.SelectedItem;
        sensorEntry.SensorId = sensor.Identifier;

        if (!Data.SensorEntries.Contains(sensorEntry))
            Data.SensorEntries.Add(sensorEntry);

        Data.Save();

        DialogResult = true;

        Close();
    }

    private void HardwareTypeComboBox_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
    {
        if (HardwareTypeComboBox.SelectedIndex == -1)
            return;

        var hardwareType = (HardwareTypeItem)HardwareTypeComboBox.SelectedItem;

        HardwareComboBox.SelectedIndex = -1;
        SensorTypeComboBox.SelectedIndex = -1;
        SensorComboBox.SelectedIndex = -1;

        HardwareComboBox.ItemsSource = Data.ComputerHardware.Where(h => h.Type == hardwareType.Value);
    }

    private void HardwareComboBox_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
    {
        if (HardwareComboBox.SelectedIndex == -1)
            return;

        var hardware = (Hardware)HardwareComboBox.SelectedItem;

        SensorTypeComboBox.SelectedIndex = -1;
        SensorComboBox.SelectedIndex = -1;

        SensorTypeComboBox.ItemsSource = hardware.Sensors.DistinctBy(s => s.Type).Select(s => new SensorTypeItem(s.Type)).OrderBy(s => s.Name);
    }

    private void SensorTypeComboBox_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
    {
        if (SensorTypeComboBox.SelectedIndex == -1)
            return;

        var hardware = (Hardware)HardwareComboBox.SelectedItem;
        var sensorType = (SensorTypeItem)SensorTypeComboBox.SelectedItem;

        SensorComboBox.ItemsSource = hardware.Sensors.Where(s => s.Type == sensorType.Value);
    }

    private void SensorComboBox_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e)
    {
        UpdateCurrentSensorValue();
    }

    private void UpdateCurrentSensorValue()
    {
        var sensor = (Sensor)SensorComboBox.SelectedItem;

        if (sensor?.Value == null)
        {
            CurrentValueTextBox.Text = string.Empty;
            return;
        }

        var hardware = (Hardware)HardwareComboBox.SelectedItem;

        var displaySensorEntry = new SensorEntry { HardwareId = hardware.Identifier, SensorId = sensor.Identifier };

        CurrentValueTextBox.Text = string.Format(displaySensorEntry.SensorValueFormat, displaySensorEntry.Sensor!.Value);
    }
}