using System;
using UnityEditor;
using UnityEngine;

[Serializable]
public class CampToolAddKeyData
{
    public AnimationClip animationClip;
    public float addTime;
}


public class CampToolAddKey : EditorWindow
{

    [MenuItem("Window/CampTool/Animation Clips Add Key")]

    public static void OpenCameraAddKeyaddKeyDataWindow()
    {
        GetWindow<CampToolAddKey>("Animation Add Key");
    }
    public  float defaultAddTime = 2;
    Vector2 scrollPosition;
    [SerializeField] private CampToolAddKeyData[] addKeyData = new CampToolAddKeyData[0];
    private void OnGUI()
    {
        GUILayout.Label("Animation Add Key", EditorStyles.boldLabel);
        //显示 defaultAddTime
        defaultAddTime = EditorGUILayout.FloatField("defaultAddTime", defaultAddTime);

        if (GUILayout.Button("Add Key Data"))
        {
            Array.Resize(ref addKeyData, addKeyData.Length + 1);
            CampToolAddKeyData campToolAddKeyData = new CampToolAddKeyData();
            campToolAddKeyData.addTime = defaultAddTime;
            addKeyData[addKeyData.Length - 1] = campToolAddKeyData;
        }

        //显示在一个滑动框中
        scrollPosition = EditorGUILayout.BeginScrollView(scrollPosition);

        for (int i = 0; i < addKeyData.Length; i++)
        {
            EditorGUILayout.BeginVertical("box");
            addKeyData[i].animationClip = (AnimationClip)EditorGUILayout.ObjectField("Animation Clip", addKeyData[i].animationClip, typeof(AnimationClip), false);
            addKeyData[i].addTime = EditorGUILayout.FloatField("Add Time", addKeyData[i].addTime);

            if (GUILayout.Button("Remove"))
            {
                RemoveAt(ref addKeyData, i);
            }

            EditorGUILayout.EndVertical();
        }
        EditorGUILayout.EndScrollView();

        // Button to scale animation clips
        if (GUILayout.Button("Add Key"))
        {
            AddKeyData(addKeyData);
        }
    }
    private void RemoveAt(ref CampToolAddKeyData[] array, int index)
    {
        for (int i = index; i < array.Length - 1; i++)
        {
            array[i] = array[i + 1];
        }
        Array.Resize(ref array, array.Length - 1);
    }
    private void AddKeyData(CampToolAddKeyData[] data)
    {
        if (data == null || data.Length == 0)
        {
            Debug.LogWarning("No animation clips selected.");
            return;
        }

        foreach (var item in data)
        {
            AnimationClip newAni = item.animationClip;
            EditorCurveBinding[] bindings = AnimationUtility.GetCurveBindings(newAni);

            for (int j = 0; j < bindings.Length; j++)
            {
                var binding = bindings[j];
                AnimationCurve curve = AnimationUtility.GetEditorCurve(newAni, binding);
                // 获取关键帧的数量
                int keyCount = curve.keys.Length;
                if (keyCount > 2)
                {
                    AnimationCurve newCurve = new AnimationCurve();
                    newCurve.AddKey(curve[0]);
                    for (int k = 1; k < keyCount - 1; k++)
                    {
                        newCurve.AddKey(curve[k]);
                        float startTime = curve[k].time;
                        float endTime = curve.keys[k + 1].time;
                        float differenceTime = endTime - startTime;
                        float startValue = curve[k].value;
                        float endValue = curve.keys[k + 1].value;
                        float differenceValue = endValue - startValue;
                        float curTime = 0;
                        float curValue;
                        while (curTime < differenceTime)
                        {
                            curTime += item.addTime;
                            curValue = startValue + curTime / differenceTime * differenceValue;
                            Keyframe keyframe = new Keyframe(curTime + startTime, curValue, 0, 0);
                            newCurve.AddKey(keyframe);
                        }
                        newCurve.AddKey(curve[k + 1]);
                    }
                    AnimationUtility.SetEditorCurve(newAni, binding, newCurve);
                }
            }
            EditorUtility.SetDirty(newAni);
        }
        AssetDatabase.SaveAssets();
        Debug.Log("Animation successfully.");
    }

}