using System;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Input;
using Avalonia.Markup.Xaml;
using DispenserUI.ViewModels.Components;
using DispenserUI.Views.Controls;

namespace DispenserUI.Views.Windows;

public partial class CameraViewerWindow : Window
{
    public CameraViewerVM ViewModel { get; } = new();

    public CameraViewerWindow()
    {
        DataContext = ViewModel;
        InitializeComponent();

        Body = this.FindControl<Grid>("Body")!;
        Viewer = this.FindControl<ImageViewer>("Viewer")!;

        this.GetObservable(WindowStateProperty).Subscribe(state =>
        {
            if (state == WindowState.Maximized)
            {
                ViewModel.IsFullScreen = true;
                // 全屏
                Body.ColumnDefinitions[1].Width = new GridLength(0);
            }
            else if (state == WindowState.Normal)
            {
                // 恢复正常大小
                Body.ColumnDefinitions[1].Width = new GridLength(400);
                ViewModel.IsFullScreen = false;
                SystemDecorations = SystemDecorations.Full;
            }
        });

        ViewModel.InitViewer(Viewer);
        ViewModel.InitWindow(this);
    }

    private void InitializeComponent()
    {
        AvaloniaXamlLoader.Load(this);
    }


    protected override void OnClosing(WindowClosingEventArgs e)
    {
        base.OnClosing(e);
        // 退出的时候顺便停止采集视频
        ViewModel.StopCaptureVideo();
        ViewModel.DisableCameraListener();
        ViewModel.StopRecordingVideo();
    }

    protected override void OnResized(WindowResizedEventArgs e)
    {
        base.OnResized(e);
        ViewModel.OnWindowResize();
    }

    private void OnNormalWindowClicked(object? sender, TappedEventArgs e)
    {
        WindowState = WindowState.Normal;
        Body.ColumnDefinitions[1].Width = new GridLength(400);
        ViewModel.IsFullScreen = false;
    }

    /// <summary>
    ///     电机缩小
    /// </summary>
    private void OnNarrowClicked(object? sender, TappedEventArgs e)
    {
        Viewer.ImageShrink();
    }

    /// <summary>
    ///     点击放大
    /// </summary>
    private void OnEnlargeClicked(object? sender, TappedEventArgs e)
    {
        Viewer.ImageEnlarge();
    }


    private void OnPixelChanged(object? sender, Point point)
    {
        ViewModel.PixelCoordinate = $"{point.X:0.###} * {point.Y:0.###}";
    }

    private void OnScaleRatioChanged(object? sender, double ratio)
    {
        ViewModel.UpdateScaleRatio(ratio);
    }

    private void OnCenterPixelChanged(object? sender, Point e)
    {
        Console.WriteLine($"中心像素点: {e}");
        ViewModel.CenterPixelPoint = e;
    }
}