using System.ComponentModel;
using System.Runtime.CompilerServices;

namespace DeviceService.Entity
{
    public abstract class NotifyBase : INotifyPropertyChanged
    {
        public event PropertyChangedEventHandler? PropertyChanged;

        /// <summary>
        /// 设置字段值并触发通知。值与旧值相等（或同为 null）时不触发，返回是否真正赋值。
        /// </summary>
        protected bool SetProperty<T>(ref T field, T value, [CallerMemberName] string? propertyName = null)
        {
            if (Equals(field, value))
            {
                return false;
            }

            field = value;
            OnPropertyChanged(propertyName);
            return true;
        }

        /// <summary>触发当前属性的通知，propertyName 缺省为调用方属性名。</summary>
        protected void OnPropertyChanged([CallerMemberName] string? propertyName = null)
        {
            RaiseChanged(propertyName);
        }

        /// <summary>显式触发指定属性的通知（如依赖属性联动）。</summary>
        protected void OnPropertyChanged(string propertyName, params string[] morePropertyNames)
        {
            RaiseChanged(propertyName);
            foreach (var name in morePropertyNames)
            {
                RaiseChanged(name);
            }
        }

        /// <summary>通知全部属性已变更（配合 DataTemplate 时刷新所有绑定，等效于 Text 通知）。</summary>
        protected void RaiseAllChanged()
        {
            RaiseChanged(string.Empty);
        }

        private void RaiseChanged(string? propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName ?? string.Empty));
        }
    }
}