using System.Collections.Generic;
using System.Text;

namespace Aitex.Core.RT.IOCore
{
	internal class InterlockAction
	{
		private readonly List<IInterlockLimit> _limits;

		private readonly DOAccessor _do;

		private readonly bool _actionValue;

		private readonly string _tip;

		private Dictionary<string, string> _cultureTip;

		public string ActionName => (_do != null) ? _do.Name : "";

		public InterlockAction(DOAccessor doItem, bool value, string tip, Dictionary<string, string> cultureTip,
			List<IInterlockLimit> limits)
		{
			_do = doItem;
			_actionValue = value;
			_tip = tip;
			_cultureTip = cultureTip;
			_limits = limits;
		}

		public bool IsSame(string doName, bool value)
		{
			return doName == _do.Name && _actionValue == value;
		}

		/// <summary>
		/// 如果命中某个互锁限制条件，则将DO电平恢复到Action定义的反向电平。
		/// </summary>
		/// <param name="reason">执行恢复电平动作的信息。</param>
		/// <returns>
		/// True：执行了电平恢复操作；False：未操作电平
		/// </returns>
		public bool TryReverse(out string reason)
		{
			reason = string.Empty;
			
			// 如果DO当前电平不等于Action定义的电平，则啥也不干
			if (_do.Value != _actionValue)
				return false;
			
			// 如果DO已经输出Action定义的电平，则反向
			if (_do.SetValue(!_actionValue, out reason))
				reason = $"Interlock Force set DO-{_do.IoTableIndex}({_do.Name}) = [{((!_actionValue) ? "ON" : "OFF")}]";
			return true;
		}

		public bool CanDo(out string reason)
		{
			reason = string.Empty;
			var sbReason = new StringBuilder();
			var result = true;
			foreach (var limit in _limits)
			{
				if (!limit.CanDo(out var limitReason))
				{
					sbReason.AppendLine(limitReason);
					result = false;
				}
			}

			// 如果有互锁被触发，则打印互锁信息
			if (!result)
			{
				sbReason.Insert(0,
					$"Interlock triggered, DO-{_do.IoTableIndex}({_do.Name}) can not be [{(_actionValue ? "ON" : "OFF")}]{(string.IsNullOrEmpty(_tip) ? "" : $",{_tip}")} \r\n");
				reason = sbReason.ToString().TrimEnd('\r', '\n');
			}
			
			return result;
		}

		public override string ToString()
		{
			return $"{ActionName}, Action={_actionValue}, Limit Count={_limits.Count}";
		}
	}
}