using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
#if UNITY_EDITOR
using UnityEditor;
#endif

// 不要修改枚举的顺序，只能在后面新加，不能删除

public enum EAnimationToogle
{
	Combo = 0, // 连击
	SuperArmor = 1, //霸体
	Break = 2, // 打断
}

[Serializable]
public struct FromTo
{
	[SerializeField] public float from;
	[SerializeField] public float to;
	public Vector2 fromTo
	{
		get
		{
			return new Vector2(from, to);
		}
		set
		{
			from = value.x;
			to = value.y;
		}
	}
	public FromTo(float from, float to)
	{
		this.from = from;
		this.to = to;
	}
	public FromTo(Vector2 fromTo)
	{
		this.from = fromTo.x;
		this.to = fromTo.y;
	}
}

[Serializable]
public class ToggleTimeDictionary : SerializableDictionary<EAnimationToogle, FromTo> { }

public enum EAnimationCurve
{
	TimeScale = 0,  // 
	RootMotionScale = 1,
}

[Serializable]
public class CurveDictionary : SerializableDictionary<EAnimationCurve, AnimationCurve> { }

[Serializable]
public struct AnimationParameter
{
	[Serializable]
	public struct Setter
	{
		[SerializeField] public float normalizedTime;
		[SerializeField] public float value;
	}
	[SerializeField] public List<Setter> setters;
}

public enum EAnimationParameter
{
	Visibility = 0,
}

[Serializable]
public class ParameterDictionary : SerializableDictionary<EAnimationParameter, AnimationParameter> { }

[Serializable]
public class RootMotionOverrideData
{
    [Serializable]
    public class PosData
	{
		[SerializeField] public Vector3 position;
        [SerializeField] public int frame;
        public PosData(int frame, Vector3 pos)
        {
            this.frame = frame;
            this.position = pos;
        }
	}
    [SerializeField] public List<PosData> positions;
    public RootMotionOverrideData()
    {
        positions = new List<PosData>();
    }
    public Vector3 GetPosition(float frame)
    {
        if (positions == null || positions.Count == 0)
            return Vector3.zero;
        positions.Sort((p1, p2) => {
            if (p1.frame < p2.frame)
                return -1;
            if (p1.frame > p2.frame)
                return 1;
            return 0;
        });
        int prev = 0;
        int next = 0;
        for(int i = 0;i < positions.Count; ++i)
        {
            if(positions[i].frame > frame)
            {
                break;
            }
            prev = i;
            next = Mathf.Clamp(i + 1, 0, positions.Count - 1);
        }
        float t = 0;
        if(prev != next)
        {
            t = (frame - positions[prev].frame) / (positions[next].frame - positions[prev].frame);
        }
        Vector3 pos = Vector3.Lerp(positions[prev].position, positions[next].position, t);
        return pos;
    }

    public Vector3 GetRootMotionDistance(float prevFrame, float curFrame)
    {
        Vector3 p1 = GetPosition(prevFrame);
        Vector3 p2 = GetPosition(curFrame);
        return p2 - p1;
    }

    public void SetPosition(int frame, Vector3 position)
    {
        if(positions == null)
        {
            positions = new List<PosData>();
        }
        PosData pd = positions.Find(s => s.frame == frame);
        if(pd != null)
        {
            pd.position = position;
        }
        else
        {
            positions.Add(new PosData(frame, position));
        }
    }

    public void RemovePositionAtFrame(float frame)
    {
        if (positions == null)
            return;
        PosData pd = positions.Find(s => s.frame == frame);
        if(pd != null)
        {
            positions.Remove(pd);
        }
    }
}

// 某个动画的数据，包括帧事件、碰撞盒、速度曲线
[CreateAssetMenu(fileName = "Animation Data")]
public class AnimationData : ScriptableObject
{
	public string animationName;
	public string animationPath;

	public List<AnimationEventBase> animationEvents;

	public List<ColliderData> hurtBoxes;
	public List<ColliderData> hitBoxes;
	public List<ColliderData> throwBoxes;
	public List<ColliderData> blockBoxes;
	public List<ColliderData> defendBoxes;

	public bool overrideRootMotion;
	public RootMotionOverrideData rootMotionOverrideData;

	// 对应的进度的播放速度，默认是1
	[UnityEngine.Serialization.FormerlySerializedAs("curve")]
	public AnimationCurve speedCurve;

	public CurveDictionary curves;

	public ToggleTimeDictionary toggles;

	public ParameterDictionary parameters;

	public const int FPS = 30;

	public AnimationData()
	{
		Keyframe frame0 = new Keyframe(0, 1);
		Keyframe frame1 = new Keyframe(1, 1);
		speedCurve = new AnimationCurve(frame0, frame1);
	}

	public List<ColliderData> GetColliderBoxesByType(ColliderBox.EColliderType type)
	{
		switch (type)
		{
			case ColliderBox.EColliderType.HurtBox:
				return hurtBoxes;
			case ColliderBox.EColliderType.HitBox:
				return hitBoxes;
			case ColliderBox.EColliderType.BlockBox:
				return blockBoxes;
			case ColliderBox.EColliderType.ThrowBox:
				return throwBoxes;
			case ColliderBox.EColliderType.DefendBox:
				return defendBoxes;
		}
		return null;
	}

	public bool HasParameter(EAnimationParameter parameterName)
	{
		if (!parameters.ContainsKey(parameterName))
			return false;
		return true;
	}

	public float GetParameter(EAnimationParameter parameterName, float normalizedTime)
	{
		if (!parameters.ContainsKey(parameterName))
			return 0;
		var parameter = parameters[parameterName];
		parameter.setters.Sort((AnimationParameter.Setter a, AnimationParameter.Setter b) =>
		{
			return a.normalizedTime - b.normalizedTime < 0 ? -1 : 1;
		});
		float value = 0;
		for (int i = 0; i < parameter.setters.Count; ++i)
		{
			AnimationParameter.Setter setter = parameter.setters[i];
			if (setter.normalizedTime > normalizedTime)
				break;
			value = setter.value;
		}
		return value;
	}

	public bool HasCurve(EAnimationCurve curve)
	{
		return curves != null && curves.ContainsKey(curve);
	}

	public AnimationCurve GetCurve(EAnimationCurve curve)
	{
		if (!HasCurve(curve))
			return null;
		return curves[curve];
	}

	public bool HasToggle(EAnimationToogle toggle)
	{
		return toggles != null && toggles.ContainsKey(toggle);
	}

	public bool IsToggleOpen(EAnimationToogle toggle, float normalizedTime)
	{
		if (!HasToggle(toggle))
        {
            return false;
        }
        return toggles[toggle].to >= normalizedTime && normalizedTime >= toggles[toggle].from;
	}

    public ColliderInfo GetColliderInfo(ColliderBox.EColliderType type, int index, float playbackTime)
    {
        return GetColliderInfoByFrame(type, index, playbackTime * FPS);
    }

    public ColliderInfo GetColliderInfoByFrame(ColliderBox.EColliderType type, int index, float frame)
    {
        ColliderInfo info = new ColliderInfo();
        var colliders = GetColliderBoxesByType(type);
        if (colliders == null || colliders.Count <= index)
            return info; //info.isValid == false
        info = colliders[index].GetColliderInfo(frame);
        return info;
    }

    public ColliderInfo[] GetCollidersInfo(ColliderBox.EColliderType type, float playbackTime)
    {
        return GetCollidersInfoByFrame(type, playbackTime * FPS);
    }

    public ColliderInfo[] GetCollidersInfoByFrame(ColliderBox.EColliderType type, float frame)
    {
        var colliders = GetColliderBoxesByType(type);
        if (colliders == null || colliders.Count == 0)
            return null;
        ColliderInfo[] infos = new ColliderInfo[colliders.Count];
        for(int i = 0; i < colliders.Count; ++i)
        {
            infos[i] = colliders[i].GetColliderInfo(frame);
        }
        return infos;
    }

    public ColliderInfo[] GetActiveCollidersInfo(ColliderBox.EColliderType type, float playbackTime)
    {
        return GetActiveCollidersInfoByFrame(type , playbackTime * FPS);
    }

    public ColliderInfo[] GetActiveCollidersInfoByFrame(ColliderBox.EColliderType type, float frame)
    {
        var all = GetCollidersInfoByFrame(type, frame);
        if (all == null || all.Length == 0)
            return null;
        int activeCount = 0;
        foreach(var c in all)
        {
            if (c.active)
                activeCount++;
        }
        if (activeCount == 0)
            return null;
        ColliderInfo[] active = new ColliderInfo[activeCount];
        int i = 0;
        foreach(var c in all)
        {
            if(c.active)
            {
                active[i++] = c;
            }
        }
        return active;
    }

    public int GetBoxesCount()
    {
        int hurt = hurtBoxes != null ? hurtBoxes.Count : 0;
        int hit = hitBoxes != null ? hitBoxes.Count : 0;
        int thro = throwBoxes != null ? throwBoxes.Count : 0;
        int block = blockBoxes != null ? blockBoxes.Count : 0;
        int defend = defendBoxes != null ? defendBoxes.Count : 0;
        return hurt + hit + thro + block + defend;
    }

    public void AddBox(ref List<ColliderData> boxList, ColliderData box)
    {
        if (boxList == null)
        {
            boxList = new List<ColliderData>();
            return;
        }
        boxList.Add(box);
    }

    public void DeleteBox(ColliderData box)
    {
        if (hurtBoxes != null) hurtBoxes.Remove(box);
        if (hitBoxes != null) hitBoxes.Remove(box);
        if (throwBoxes != null) throwBoxes.Remove(box);
        if (blockBoxes != null) blockBoxes.Remove(box);
        if (defendBoxes != null) defendBoxes.Remove(box);
    }

    public ColliderData GetColliderByIndex(int index)
    {
        if (hurtBoxes != null && hurtBoxes.Count > index)
            return hurtBoxes[index];
        else
            index -= hurtBoxes.Count;
        if (hitBoxes != null && hitBoxes.Count > index)
            return hitBoxes[index];
        else
            index -= hitBoxes.Count;
        if (throwBoxes != null && throwBoxes.Count > index)
            return throwBoxes[index];
        else
            index -= throwBoxes.Count;
        if (blockBoxes != null && blockBoxes.Count > index)
            return blockBoxes[index];
        else
            index -= blockBoxes.Count;
        if (defendBoxes != null && defendBoxes.Count > index)
            return defendBoxes[index];
        else
            index -= defendBoxes.Count;
        return null;
    }

    public void AddEvent(AnimationEventBase animEvent)
    {
        if (this.animationEvents == null)
            this.animationEvents = new List<AnimationEventBase>();
        animationEvents.Add(animEvent);
    }

    public List<AnimationEventBase> GetAnimationEventsAtFrame(int frame)
    {
        if (animationEvents == null)
            return null;

        List<AnimationEventBase> events = ListPool<AnimationEventBase>.Get();
        events.Clear();
        foreach (var animeEvent in animationEvents)
        {
            if(animeEvent.startFrame == frame)
            {
                events.Add(animeEvent);
            }
        }
        return events;
    }

    public int GetMaxAnimationEventsCount()
    {
        List<int> frames = GetAnimationEventFrameIndices();
        if(frames == null)
        {
            ListPool<int>.Release(frames);
            return 0;
        }
        int count = 0;
        for(int i = 0; i < frames.Count; ++i)
        {
            List<AnimationEventBase> events = GetAnimationEventsAtFrame(frames[i]);
            if (count < events.Count)
            {
                count = events.Count;
            }
            ListPool<AnimationEventBase>.Release(events);
        }
        ListPool<int>.Release(frames);
        return count;
    }

    public List<int> GetAnimationEventFrameIndices()
    {
        if (animationEvents == null)
            return null;

        List<int> frames = ListPool<int>.Get();
        frames.Clear();
        foreach (var animeEvent in animationEvents)
        {
            if (!frames.Contains(animeEvent.startFrame))
            {
                frames.Add(animeEvent.startFrame);
            }
        }
        return frames;
    }

    public void DeleteEvent(AnimationEventBase animEvent)
    {
        if(animationEvents.Contains(animEvent))
        {
            animationEvents.Remove(animEvent);
        }
    }

    public void AddRootMotionOverriderData( )
    {
        this.overrideRootMotion = true;
        this.rootMotionOverrideData = new RootMotionOverrideData();
    }

    public void DeleteRootMotionOverrideData()
    {
        this.overrideRootMotion = false;
        this.rootMotionOverrideData = null;
    }

#if UNITY_EDITOR
    public void OnSaveToDisk()
    {
        foreach(var animEvent in animationEvents)
        {
            if(!AssetDatabase.IsSubAsset(animEvent))
            {
                AssetDatabase.AddObjectToAsset(animEvent, this);
            }
        }
    }
#endif

}