using System;
using System.Collections.Generic;
using ActionGameFramework.Audio;
using Core.Health;
using DG.Tweening;
using MoreMountains.NiceVibrations;
using TowerDefense.Agents;
using TowerDefense.UI.HUD;
using UnityEngine;
using UnityEngine.UI;

namespace TowerDefense.Level
{
	/// <summary>
	/// A class representing the home base that players must defend
	/// </summary>
	public class PlayerHomeBase : DamageableBehaviour
	{
		/// <summary>
		/// The particle system when an attack is charging
		/// </summary>
		public ParticleSystem chargePfx;

		/// <summary>
		/// Sound to play when charge effect starts
		/// </summary>
		public RandomAudioSource chargeSound;
		
		/// <summary>
		/// The particle system for an attack
		/// </summary>
		public ParticleSystem attackPfx;
		
		/// <summary>
		/// Sound to play when attack effect starts
		/// </summary>
		public RandomAudioSource attackSound;

		/// <summary>
		/// 是否对手的HomeBase
		/// </summary>
		public bool opponent = false;

		/// <summary>
		/// 用于确认HomeBase血量的ImageList.
		/// </summary>
		public List<Image> listHeart;


		/// <summary>
		/// The current Agents within the home base attack zone
		/// </summary>
		protected List<Agent> m_CurrentAgentsInside = new List<Agent>();

		/// <summary>
		/// Subscribes to damaged event
		/// </summary>
		protected virtual void Start()
		{
			configuration.damaged += OnDamaged;
		}

		/// <summary>
		/// 当前HomeBase对应的X索引，用于跟TowerPlacementGrid的塔位联系起来
		/// </summary>
		public int homebaseIdx
        {
			get;set;
        }

		/// <summary>
		/// Unsubscribes to damaged event
		/// </summary>
		protected virtual void OnDestroy()
		{
			configuration.damaged -= OnDamaged;
		}

		/// <summary>
		/// Plays <see cref="attackPfx"/> if assigned
		/// </summary>
		protected virtual void OnDamaged(HealthChangeInfo obj)
		{
			if ((attackPfx != null)&&(!opponent) )
			{
				ParticleSystem playParticle = Instantiate(attackPfx);
				playParticle.transform.position = this.position;
				playParticle.Simulate(0.0f);
				playParticle.Play();

				// 
				// 播放屏幕振动和手机振动:
				ViewPortAdj.instance.cachedCamera.DOShakePosition(0.25f, 1.5f, 4);
				MMVibrationManager.Haptic(HapticTypes.HeavyImpact);

			}
			if (attackSound != null)
			{
				attackSound.PlayRandomClip();
			}
		}
		
		/// <summary>
		/// Adds triggered Agent to tracked Agents, subscribes to Agent's
		/// removed event and plays pfx
		/// </summary>
		/// <param name="other">Triggered collider</param>
		void OnTriggerEnter(Collider other)
		{
			var homeBaseAttacker = other.GetComponent<HomeBaseAttacker>();
			if (homeBaseAttacker == null)
			{
				// 场景内所有放置的Tower上的Targetter都会在这碰撞出现!
				//if( other.transform.parent )
				//	Debug.Log("PlayerHomeBase Name is:" + other.transform.parent.name);
				return;
			}
			//Debug.Log("Agent到达HomeBase的位置...");
			m_CurrentAgentsInside.Add(homeBaseAttacker.agent);
			homeBaseAttacker.agent.removed += OnAgentRemoved;
			if (chargePfx != null)
			{
				chargePfx.Play();
			}
			if (chargeSound != null)
			{
				chargeSound.PlayRandomClip();
			}
			// 播放攻击动作:
			//homeBaseAttacker.agent.PlayAttack();

		}
		
		/// <summary>
		/// If the entity that has entered the collider
		/// has an <see cref="Agent"/> component on it
		/// </summary>
		void OnTriggerExit(Collider other)
		{
			var homeBaseAttacker = other.GetComponent<HomeBaseAttacker>();
			if (homeBaseAttacker == null)
			{
				return;
			}
			RemoveTarget(homeBaseAttacker.agent);
		}
		
		/// <summary>
		/// Removes Agent from tracked <see cref="m_CurrentAgentsInside"/>
		/// </summary>
		void OnAgentRemoved(DamageableBehaviour targetable)
		{
			targetable.removed -= OnAgentRemoved;
			Agent attackingAgent = targetable as Agent;
			RemoveTarget(attackingAgent);
		}

		/// <summary>
		/// Removes <paramref name="agent"/> from <see cref="m_CurrentAgentsInside"/> and stops pfx 
		/// if there are no more <see cref="Agent"/>s
		/// </summary>
		/// <param name="agent">
		/// The agent to remove
		/// </param>
		void RemoveTarget(Agent agent)
		{
			if (agent == null)
			{
				return;
			}
			m_CurrentAgentsInside.Remove(agent);
			if (m_CurrentAgentsInside.Count == 0 && chargePfx != null)
			{
				chargePfx.Stop();
			}
		}

		/// <summary>
		/// Fires kill events
		/// </summary>
		protected override void OnDeath()
		{
			base.OnDeath();

			// WORK START: 看看是否对手塔位可以被干掉.对手Wave的出兵规则，需要重新开始处理。
			// 干掉当前塔位，显示成破坏状态
			Debug.Log("当前HomeBase被干掉:" + homebaseIdx.ToString());
            if (GameUI.instanceExists)
                GameUI.instance.DestroyTowerGrid(homebaseIdx, this.opponent);
		}
	}
}