using System;
using System.Linq;
using System.Windows.Controls;
using System.Windows.Media.Animation;

namespace WPFluent.Controls;

/// <summary>
/// 设置DataTempate
/// </summary>
/// <example>
/// <controls:RunningLine.LineTemplate><DataTemplate><AutoStackPanel Orientation = "Horizontal" >< Path
/// VerticalAlignment="Center" Data="M21.2575 9.44627V2.38044H22.8083V2.87294C23.9958 2.12794 26.1758 2.16461 27.285
/// 3.37878C27.8333 2.78461 28.5008 2.37877 29.4942 2.37877C30.8275 2.37877 32.365 3.13961 32.4617 4.69294C32.5025
/// 5.84378 32.4875 8.16711 32.5 9.44294H30.965C30.96 8.45627 30.965 6.69794 30.965 5.71127C30.965 5.51877 30.965
/// 5.32544 30.955 5.13377C30.9033 4.40377 30.4683 3.92711 29.8883 3.76711C29.1525 3.56378 28.2767 3.93377 27.9383
/// 4.56711C27.72 4.97461 27.7 5.31211 27.6692 5.77544C27.61 6.66211 27.6517 8.55294 27.6517 9.44211H26.1075C26.1075
/// 8.50377 26.1075 6.60877 26.1075 5.67377C26.1132 5.44061 26.1035 5.20732 26.0783 4.97544C25.9692 4.23794 25.5633
/// 3.86544 24.9558 3.74628C24.1792 3.59461 23.43 3.95211 23.0892 4.49628C22.9212 4.86271 22.8307 5.2599 22.8233
/// 5.66294L22.8083 9.44211L21.2575 9.44627ZM3.68583 7.96169C4.86 7.95669 5.69417 7.11919 5.70667 5.93419C5.72 4.72003
/// 4.865 3.85086 3.66417 3.85086C2.46333 3.85086 1.64167 4.71169 1.66417 5.95336C1.68167 7.15669 2.5 7.96752 3.68583
/// 7.96169ZM7.26917 9.44669H5.73L5.7225 8.59753C5.27225 8.96135 4.74445 9.21691 4.17981 9.34449C3.61517 9.47207 3.02877
/// 9.46826 2.46583 9.33336C1.74 9.16669 1.15833 8.74169 0.715833 8.14086C-0.305 6.76586 -0.215833 4.68669 0.911667
/// 3.42503C2.03917 2.16336 3.97 2.03002 5.72583 3.10752V2.38086H7.2725L7.26917 9.44669ZM16.84 9.43881C14.6783 9.43881
/// 13.18 7.99548 13.1825 5.91215C13.1825 3.85381 14.7367 2.36465 16.86 2.38298C18.9583 2.40048 20.4742 3.86798 20.4917
/// 5.89715C20.5092 7.96048 18.9858 9.43798 16.84 9.43881ZM16.8183 7.99131C18 7.99965 18.8333 7.16631 18.8533
/// 5.97215C18.8758 4.74215 18.0383 3.85715 16.8458 3.85131C15.6533 3.84548 14.7908 4.72881 14.8017 5.94465C14.8133
/// 7.13048 15.655 7.98465 16.8183 7.99131ZM8.80917 0.0214844H10.3592V2.37898H12.3467V3.85732H10.3592C10.3592 3.85732
/// 10.3375 6.13732 10.3592 7.00232C10.3775 7.75232 10.605 7.93482 11.3408 7.96315C11.6508 7.97482 11.9617 7.96315
/// 12.3408 7.96315V9.44482C11.9908 9.43732 10.7817 9.47732 10.1933 9.33398C9.50417 9.17565 9.07333 8.69982 8.91583
/// 8.00648C8.84948 7.72704 8.81399 7.44117 8.81 7.15398C8.80083 4.94482 8.79417 0.241484 8.80917 0.0214844ZM36.9117
/// 7.96169C38.0858 7.95669 38.92 7.11919 38.9325 5.93419C38.9458 4.72003 38.0908 3.85086 36.8908 3.85086C35.6908
/// 3.85086 34.8675 4.71169 34.8908 5.95336C34.9075 7.15669 35.7242 7.96752 36.9117 7.96169ZM40.495
/// 9.44669H38.9558L38.9483 8.59753C38.4981 8.96135 37.9703 9.21691 37.4056 9.34449C36.841 9.47207 36.2546 9.46826
/// 35.6917 9.33336C34.9658 9.16669 34.3842 8.74169 33.9417 8.14086C32.9208 6.76586 33.01 4.68669 34.1375 3.42503C35.265
/// 2.16336 37.1958 2.03002 38.9517 3.10752V2.38086H40.4983L40.495 9.44669ZM42.035
/// 0.0214844H43.5833V2.37898H45.5708V3.85732H43.5833C43.5833 3.85732 43.5617 6.13732 43.5833 7.00232C43.6025 7.75232
/// 43.8333 7.93482 44.565 7.96315C44.875 7.97482 45.1858 7.96315 45.565 7.96315V9.44482C45.2158 9.43732 44.0058 9.47732
/// 43.4175 9.33398C42.7283 9.17565 42.2983 8.69982 42.14 8.00648C42.0736 7.72704 42.0382 7.44117 42.0342
/// 7.15398C42.0267 4.94482 42.0208 0.241484 42.035 0.0214844ZM53.8108 7.96169C54.985 7.95669 55.8192 7.11919 55.8317
/// 5.93419C55.845 4.72003 54.99 3.85086 53.79 3.85086C52.59 3.85086 51.7667 4.71169 51.79 5.95336C51.8067 7.15669
/// 52.6233 7.96753 53.8108 7.96169ZM57.3942 11.92H55.855L55.8475 8.59753C55.3972 8.96135 54.8695 9.21691 54.3048
/// 9.34449C53.7402 9.47207 53.1538 9.46826 52.5908 9.33336C51.865 9.16669 51.2833 8.74169 50.8408 8.14086C49.82 6.76586
/// 49.9092 4.68669 51.0367 3.42503C52.1642 2.16336 54.095 2.03002 55.8508 3.10752V2.38086H57.3975L57.3942
/// 11.92ZM47.0908 2.25022L48.6375 0.673555V0.0185547H47.0908V2.25022ZM48.6375 2.91699L47.0908
/// 4.49366V9.44532H48.6375V2.91699Z" Fill="White"/><Ellipse Width = "4" Height="4" VerticalAlignment="Center"
/// Margin="40 0 0 0" Fill="#E5FF00"/><TextBlock Foreground = "White" VerticalAlignment="Center" Margin="40 0 0 0"
/// Text="custom aec software development"/><Ellipse Width = "4" Height="4" VerticalAlignment="Center" Margin="40 0"
/// Fill="#E5FF00"/></AutoStackPanel></DataTemplate></controls:RunningLine.LineTemplate>
/// </example>
public class RunningLine : ContentControl
{
    public static readonly DependencyProperty AnimationSpeedProperty = DependencyProperty.Register(
        nameof(AnimationSpeed),
        typeof(double),
        typeof(RunningLine),
        new PropertyMetadata(0.2d));
    public static readonly DependencyProperty LineTemplateProperty = DependencyProperty.Register(
        nameof(LineTemplate),
        typeof(DataTemplate),
        typeof(RunningLine),
        new PropertyMetadata(default(DataTemplate)));

    public RunningLine() { Loaded += OnLoaded; }

    private void EvaluatePlaceholders(ItemsControl panel)
    {
        panel.Items.Add(null);
        panel.UpdateLayout();

        var placeholdersCount = (int)(ActualWidth / panel.ActualWidth);
        var placeholders = Enumerable.Repeat((string)null, placeholdersCount);
        foreach(var item in placeholders)
            panel.Items.Add(item);
    }

    private void OnLoaded(object sender, RoutedEventArgs e)
    {
        var rootPanel = (ItemsControl)Template.FindName("RootPanel", this);
        var rootPanelNext = (ItemsControl)Template.FindName("RootPanelNext", this);

        EvaluatePlaceholders(rootPanel);
        EvaluatePlaceholders(rootPanelNext);

        RunAnimation(rootPanel, rootPanelNext);
    }

    private async void RunAnimation(ItemsControl panel, ItemsControl panelNext)
    {
        panel.UpdateLayout();
        panelNext.UpdateLayout();

        var animation = new DoubleAnimation
        {
            From = 0,
            To = -panel.ActualWidth,
            RepeatBehavior = RepeatBehavior.Forever
        };

        var animationNext = new DoubleAnimation
        {
            From = ActualWidth,
            To = ActualWidth - panel.ActualWidth,
            RepeatBehavior = RepeatBehavior.Forever
        };

        animation.Duration = TimeSpan.FromMilliseconds((animation.From.Value - animation.To.Value) / AnimationSpeed);
        animationNext.Duration = TimeSpan.FromMilliseconds(
            (animationNext.From.Value - animationNext.To.Value) / AnimationSpeed);
        animationNext.BeginTime = TimeSpan.FromMilliseconds(-animationNext.To.Value / AnimationSpeed);

        panel.BeginAnimation(Canvas.LeftProperty, animation);
        panelNext.BeginAnimation(Canvas.LeftProperty, animationNext);

        await Task.Delay(animationNext.BeginTime.Value);
        panelNext.Visibility = Visibility.Visible;
    }

    public double AnimationSpeed
    {
        get => (double)GetValue(AnimationSpeedProperty);
        set => SetValue(AnimationSpeedProperty, value);
    }

    public DataTemplate LineTemplate
    {
        get => (DataTemplate)GetValue(LineTemplateProperty);
        set => SetValue(LineTemplateProperty, value);
    }
}