using Prism.Commands;
using Prism.Mvvm;
using System;

namespace DeviceEditModule.ViewModels
{
    /// <summary>
    /// 弹窗管理器中单个 Tab 项的 ViewModel。
    /// 由 <see cref="DialogMangerViewModel"/> 在收到 AddDialogTabEvent 时创建，
    /// 通过构造函数注入选中/关闭的回调，保持与父 ViewModel 的低耦合。
    /// </summary>
    public class DialogTabItemVM : BindableBase
    {
        #region 属性

        private string _title = string.Empty;
        /// <summary>Tab 标签页上显示的标题。</summary>
        public string Title
        {
            get => _title;
            set => SetProperty(ref _title, value);
        }

        private object? _content;
        /// <summary>Tab 内容区域（通常为 UserControl 实例）。</summary>
        public object? Content
        {
            get => _content;
            set => SetProperty(ref _content, value);
        }

        private bool _isSelected;
        /// <summary>是否为当前激活 Tab（用于切换选中态样式）。</summary>
        public bool IsSelected
        {
            get => _isSelected;
            set => SetProperty(ref _isSelected, value);
        }

        #endregion

        #region 命令

        /// <summary>点击 Tab 标题激活该 Tab。</summary>
        public DelegateCommand SelectCommand { get; }

        /// <summary>点击 Tab 上的 × 关闭并移除该 Tab。</summary>
        public DelegateCommand CloseCommand { get; }

        #endregion

        /// <param name="onSelect">父 VM 提供的激活回调。</param>
        /// <param name="onClose">父 VM 提供的关闭回调。</param>
        public DialogTabItemVM(Action<DialogTabItemVM> onSelect, Action<DialogTabItemVM> onClose)
        {
            SelectCommand = new DelegateCommand(() => onSelect(this));
            CloseCommand  = new DelegateCommand(() => onClose(this));
        }
    }
}