using ReactiveUI;
using System;

namespace AuroraDesk.Core.Entities;

/// <summary>
/// 连接点实体 - 节点的输入/输出连接点
/// </summary>
public class ConnectionPoint : ReactiveObject
{
    private const double MinDiameter = 0;
    private const double MaxDiameter = 400;

    private string _label = string.Empty;
    private ConnectionPointType _type = ConnectionPointType.Output;
    private int _index;
    private bool _isConnected;
    private double _diameter = 10;
    private string _color = "#3498DB";
    private ConnectorPlacementMode _placement = ConnectorPlacementMode.Outside;

    /// <summary>
    /// 连接点唯一标识符
    /// </summary>
    public string Id { get; set; } = Guid.NewGuid().ToString();

    /// <summary>
    /// 连接点标签（显示在连接点旁边的文本）
    /// </summary>
    public string Label
    {
        get => _label;
        set => this.RaiseAndSetIfChanged(ref _label, value);
    }

    /// <summary>
    /// 连接点类型（输入或输出）
    /// </summary>
    public ConnectionPointType Type
    {
        get => _type;
        set => this.RaiseAndSetIfChanged(ref _type, value);
    }

    /// <summary>
    /// 连接点索引（在节点上的位置顺序）
    /// </summary>
    public int Index
    {
        get => _index;
        set => this.RaiseAndSetIfChanged(ref _index, value);
    }

    /// <summary>
    /// 是否已连接
    /// </summary>
    public bool IsConnected
    {
        get => _isConnected;
        set => this.RaiseAndSetIfChanged(ref _isConnected, value);
    }

    /// <summary>
    /// 附件圆直径
    /// </summary>
    public double Diameter
    {
        get => _diameter;
        set
        {
            var clamped = Math.Clamp(value, MinDiameter, MaxDiameter);
            this.RaiseAndSetIfChanged(ref _diameter, clamped);
        }
    }

    /// <summary>
    /// 附件圆颜色（Hex）
    /// </summary>
    public string Color
    {
        get => _color;
        set => this.RaiseAndSetIfChanged(ref _color, value);
    }

    /// <summary>
    /// 附件圆定位（内侧/外侧）
    /// </summary>
    public ConnectorPlacementMode Placement
    {
        get => _placement;
        set => this.RaiseAndSetIfChanged(ref _placement, value);
    }

    /// <summary>
    /// 所属节点
    /// </summary>
    public Node? Node { get; set; }
}

/// <summary>
/// 连接点类型枚举
/// </summary>
public enum ConnectionPointType
{
    /// <summary>
    /// 输入连接点（在左侧）
    /// </summary>
    Input,

    /// <summary>
    /// 输出连接点（在右侧）
    /// </summary>
    Output
}