using System;
using System.Collections.Generic;
using Avalonia;
using Avalonia.Controls;
using Avalonia.Input;
using Avalonia.Layout;
using Avalonia.Markup.Xaml;
using Avalonia.Media;
using DispenserCommon.Events;

namespace DispenserUI.Views.Controls;

/// <summary>
///     步骤条
/// </summary>
public partial class StepBar : UserControl
{
    private const string CommonColor = "#666D80";

    private const string StepColor = "#5F57FF";

    public static readonly StyledProperty<List<string>> NodesProperty =
        AvaloniaProperty.Register<StepBar, List<string>>(nameof(Nodes));

    public static readonly StyledProperty<List<Type>> TypesProperty =
        AvaloniaProperty.Register<StepBar, List<Type>>(nameof(Types));


    public static readonly StyledProperty<int> CurrentStepProperty =
        AvaloniaProperty.Register<StepBar, int>(nameof(CurrentStep));

    public StepBar()
    {
        InitializeComponent();
        Initialized += OnInitialized;
    }

    /// <summary>
    ///     步骤条节点列表
    /// </summary>
    public List<string> Nodes
    {
        get => GetValue(NodesProperty);
        set => SetValue(NodesProperty, value);
    }

    public List<Type> Types
    {
        get => GetValue(TypesProperty);
        set => SetValue(TypesProperty, value);
    }

    /// <summary>
    ///     当前步骤
    /// </summary>
    public int CurrentStep
    {
        get => GetValue(CurrentStepProperty);
        set => SetValue(CurrentStepProperty, value);
    }

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

    private void OnInitialized(object? sender, EventArgs eventArgs)
    {
        RenderSteps();
        this.GetObservable(CurrentStepProperty)
            .Subscribe(value =>
            {
                CurrentStep = value;
                RenderSteps();
            });
    }


    /// <summary>
    ///     渲染步骤条
    /// </summary>
    private void RenderSteps()
    {
        var panel = new StackPanel { Orientation = Orientation.Horizontal };
        for (var i = 0; i < Nodes.Count; i++)
        {
            // 圈圈里面的索引
            var indexTextBlock = new TextBlock
            {
                Text = (i + 1).ToString(),
                Foreground = i == CurrentStep ? Brushes.White : Brush.Parse(CommonColor),
                HorizontalAlignment = HorizontalAlignment.Center,
                VerticalAlignment = VerticalAlignment.Center,
                TextAlignment = TextAlignment.Center,
                FontSize = 14,
                Margin = new Thickness(5, 0)
            };

            // ⭕️序号
            var indexBorder = new Border
            {
                BorderBrush = i == CurrentStep ? Brush.Parse(StepColor) : Brush.Parse(CommonColor),
                Background = i == CurrentStep ? Brush.Parse(StepColor) : Brushes.Transparent,
                Width = 20,
                Height = 20,
                CornerRadius = new CornerRadius(20),
                BorderThickness = new Thickness(1),
                Child = indexTextBlock
            };

            // 步骤文本
            var stepTextBlock = new TextBlock
            {
                Text = Nodes[i],
                Foreground = i == CurrentStep ? Brush.Parse(StepColor) : Brush.Parse(CommonColor),
                VerticalAlignment = VerticalAlignment.Center,
                Margin = new Thickness(5, 0)
            };

            // 通过一个 StackPanel 将步骤文本和分隔条分隔开
            var node = new StackPanel
            {
                Name = "" + i,
                Cursor = Cursor.Parse("Hand"),
                Orientation = Orientation.Horizontal,
                Children = { indexBorder, stepTextBlock }
            };

            // 给当前节点添加点击事件
            node.PointerPressed += (sender, args) =>
            {
                // 添加点击事件
                OnStepClicked(int.Parse(node.Name!));
            };

            panel.Children.Add(node);

            // 最后一个节点不需要分隔条
            if (i >= Nodes.Count - 1) continue;

            // 分隔条
            var divide = new TextBlock
            {
                Text = "———",
                Foreground = Brushes.DarkGray,
                FontWeight = FontWeight.Bold,
                VerticalAlignment = VerticalAlignment.Center,
                Margin = new Thickness(5, 0)
            };

            panel.Children.Add(divide);
        }

        Content = panel;
    }

    /// <summary>
    ///     处理步骤的点击事件
    /// </summary>
    /// <param name="stepIndex"></param>
    private void OnStepClicked(int stepIndex)
    {
        CurrentStep = stepIndex;
        RenderSteps();
        // 发布通知
        EventBus<Type>.Publish(EventType.StepChanged, Types[stepIndex]);
    }
}