namespace ChivaXR.VR
{
	using System.Collections.Generic;
	using Sirenix.OdinInspector;
	using System.Linq;
	using UnityEngine;
	using System;

	public struct CVR_TriggerElementEventArgs
	{
		public CVR_TriggerElement triggerElement;
		public float value;
	}

	/// <summary>
	/// Trigger
	/// </summary>
	/// <param name="sender">this object</param>
	/// <param name="e"><see cref="InteractableObjectEventArgs"/></param>
	public delegate void CVRTriggerElementEventHandler(object sender, CVR_TriggerElementEventArgs e);


	/// <summary>
	/// 交互触发器
	/// </summary>
	public class CVR_TriggerElement : SerializedMonoBehaviour, IVR_OperationElement
	{
		private CVR_SimulationTool simulationTool;
		/// <summary>
		/// 可被操作工具类型
		/// </summary>    
		public bool isActive = false;
		private bool isSimulation = false;
		public CVR_ToolType toolType;

		[Header("触发点工具模拟动画")]
		[TypeFilter("GetFilteredTypeList")]
		public CVR_TriggerAniBase triggerAniBase;
		public IEnumerable<Type> GetFilteredTypeList()
		{
			var q = typeof(CVR_TriggerAniBase).Assembly.GetTypes()
				.Where(x => !x.IsAbstract)
				.Where(x => !x.IsGenericTypeDefinition)
				.Where(x => typeof(CVR_TriggerAniBase).IsAssignableFrom(x));
			return q;
		}

		private float value;
		public float Value
		{
			get { return value; }
			set
			{
				if (this.value != value)
				{
					this.value = value;
					ValueChanged?.Invoke(this, new CVR_TriggerElementEventArgs() { triggerElement = this, value = Value });
				}
			}
		}
		[HideInInspector]
		public CVRTriggerElementEventHandler ElementTrigger;
		[HideInInspector]
		public CVRTriggerElementEventHandler ValueChanged;

		public void Trigger(CVR_InteractableTriggerEventArgs e)
		{
			if (triggerAniBase == null)
			{
				OnElementTriggered();
			}
			else
			{
				simulationTool = e.triggerTool.GetComponent<CVR_SimulationTool>();
				if (triggerAniBase != null && simulationTool != null)
				{
					Debug.Log("EnterTriggerAni");
					isSimulation = true;
					triggerAniBase.Init(this, simulationTool);
					simulationTool.ExitSimulationMode += ToolCloseSimulation;
				}
			}
		}

		private void Update()
		{
			if (!isActive || !isSimulation || triggerAniBase == null) return;

			triggerAniBase.SimulationUpdate();
		}

		private void OnElementTriggered()
		{
			Debug.Log("Trigger" + this.name);
			ElementTrigger?.Invoke(this, new CVR_TriggerElementEventArgs()
			{
				triggerElement = this
			});
		}

		/// <summary>
		/// toolOpSimulation结束模拟时关闭当前ToolTarget模拟
		/// </summary>
		/// <param name="sender"></param>
		/// <param name="e"></param>
		protected virtual void ToolCloseSimulation(object sender, CVR_SimulationEventArgs e)
		{
			simulationTool.ExitSimulationMode -= ToolCloseSimulation;
			isSimulation = false;
			triggerAniBase.CloseSimulation();
			OnElementTriggered();
		}

		bool IVR_OperationElement.GetActive()
		{
			return isActive;
		}

		CVR_ToolType IVR_OperationElement.GetToolType()
		{
			return toolType;
		}
	}
}