using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public struct AttackAbilityConfig
{
	public Vector3 velocity; // velocity setup
	public int motion;
	public Animator animator;
	public PhysicsBody body;
}

// 单独的一个招式
public class AttackAbility : AbilityBase
{
	AttackAbilityConfig m_Config = new AttackAbilityConfig();

	/// <summary>
	/// 在跑动状态时可以切换的ability
	/// </summary>
	private List<Trigger> m_Triggers = new List<Trigger>();

	private List<Trigger> m_LateTriggers = new List<Trigger>();

	/// <summary>
	/// 从动画结束开始计时
	/// </summary>
	float m_TimeCount;
	public float ExpireTime
	{
		get
		{
			return m_TimeCount;
		}
	}

	public AttackAbility(Animator animator, int animation, PhysicsBody body = null)
	{
		m_Config.animator = animator;
		m_Config.motion = animation;
		m_Config.velocity = Vector3.zero;
		m_Config.body = body;
	}

	public AttackAbility(AttackAbilityConfig config)
	{
		m_Config = config;
	}

	public override void OnInit()
	{
	}

	public override void OnDefend()
	{
		throw new System.NotImplementedException();
	}

	public override void OnEnter()
	{
		m_TimeCount = 0;

		m_Config.animator.CrossFade(m_Config.motion, 0);

		if(m_Config.body != null)
		{
			m_Config.body.Velocity = m_Config.velocity;
		}
	}

	public override void OnExit()
	{
		m_TimeCount = 0;
	}

	public override void OnHit()
	{
	}

	public override void OnHurt()
	{
	}

	public override void OnTranslate(AbilityBase to)
	{
	}

	public override void OnUpdate()
	{
		AnimatorStateInfo info =  m_Config.animator.GetCurrentAnimatorStateInfo(0);
		if(info.shortNameHash == m_Config.motion && info.normalizedTime >= 0.99f)
		{
			m_TimeCount += Time.deltaTime;
		}
		foreach (var abilityTrigger in m_Triggers)
		{
			if (abilityTrigger.Update() && abilityTrigger.Swallow)
				break;
		}
	}

	// 在物理模拟之后
	public override void OnLateUpdate()
	{
		foreach (var trigger in m_LateTriggers)
		{
			if (trigger.Update() && trigger.Swallow)
				break;
		}
	}

	public void AddTrigger(Trigger trigger)
	{
		if (trigger == null || m_Triggers.Contains(trigger))
			return;
		m_Triggers.Add(trigger);
	}

	public void AddLateTrigger(Trigger trigger)
	{
		if (trigger == null || m_LateTriggers.Contains(trigger))
			return;
		m_LateTriggers.Add(trigger);
	}

}