using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using Ichni;
using Ichni.Editor;
using Ichni.RhythmGame;
using Unity.VisualScripting;
using UnityEngine;
using UnityEngine.InputSystem;

public class FlexibleFloatTab : MonoBehaviour
{
    public GraphicalFlexibleFloatWindow FatherWindow;
    public List<EventPoint> eventPoints;
    public RectTransform Area;
    public RectTransform BeatArea;
    public RectTransform XBeatArea;
    public EventPoint eventPoint;
    public GameObject BeatLine;
    public string Title;
    public GameObject FirstBeatLine;
    public FlexibleFloat connectFloat;
    public int BeatDeviver => FatherWindow.BeatDeviver;
    public int BeatNextDeviver => FatherWindow.BeatNextDeviver;

    // 初始化函数
    public void Initialize(FlexibleFloat flexibleFloat, string title)
    {
        Title = title;
        ClearChildren(Area);
        ClearChildren(BeatArea);
        eventPoints = new List<EventPoint>();
        connectFloat = flexibleFloat;
        CreateBeatLines();
        CreateEventPoints();
        RedrawEventPoints();
        Area.localPosition = new Vector3(FatherWindow.songBeat * BeatDeviver, 0, 0);
    }

    // 清除子节点
    private void ClearChildren(RectTransform parent)
    {
        for (int i = 0; i < parent.childCount; i++)
        {
            Destroy(parent.GetChild(i).gameObject);
        }
    }

    // 创建节拍线
    private void CreateBeatLines()
    {
        for (int i = 0; i < (int)EditorManager.instance.songInformation.song.length / FatherWindow.timePerBeat; i++)
        {
            GameObject u = Instantiate(BeatLine, BeatArea);
            u.transform.localPosition = new Vector3(BeatDeviver * i, 0, 0);
            if (i == 1) FirstBeatLine = u;
        }
    }

    // 创建事件点
    private void CreateEventPoints()
    {
        for (int i = 0; i <= connectFloat.animations.Count - 1; i++)
        {
            AnimatedFloat animatedFloat = connectFloat.animations[i];
            EventPoint eventPoint = Instantiate(this.eventPoint, Area);
            eventPoint.FatherTab = this;
            eventPoint.Initialize(animatedFloat);
            eventPoints.Add(eventPoint);
            LinkEventPoints(i, eventPoint);
        }
    }

    // 连接事件点
    private void LinkEventPoints(int index, EventPoint eventPoint)
    {
        if (index - 1 >= 0)
        {
            eventPoint.LastEventPoint = eventPoints[index - 1];
            eventPoint.LastEventPoint.NextEventPoint = eventPoint;
        }
        else
        {
            eventPoint.LastEventPoint = null;
        }
        if (index == connectFloat.animations.Count - 1)
        {
            eventPoint.NextEventPoint = null;
        }
    }

    // 重绘事件点
    private void RedrawEventPoints()
    {
        foreach (var i in eventPoints)
        {
            i.ReDraw(scalevalue);
        }
    }

    // 更新函数
    public void Update()
    {
        Vector3 newPosition = new Vector3(-FatherWindow.songBeat * BeatDeviver, 0, 0);
        Area.localPosition = newPosition;
        BeatArea.localPosition = newPosition;
        XBeatArea.localPosition = newPosition;
    }

    // 添加事件
    public void AddEvent()
    {
        if (Keyboard.current.ctrlKey.isPressed)
        {
            EventPoint eventPoint = Instantiate(this.eventPoint, Area);
            eventPoint.FatherTab = this;
            eventPoint.Initialize(new AnimatedFloat(GetBeat(),
             GetBeat() + (float.Parse(FatherWindow.EventMultiplier.text) * FatherWindow.timePerBeat), 0, 0, AnimationCurveType.Linear));
            eventPoints.Insert(FindInsertIndex(eventPoint.animatedFloat.startTime), eventPoint);
            LinkNewEventPoint(eventPoint);
            eventPoint.ReDraw(scalevalue);
            eventPoint.selectButton.onClick.Invoke();
            FatherWindow.ChangeValue();
            connectFloat.Add(eventPoint.animatedFloat);
            connectFloat.Sort();
        }
        else
        {
            if (FatherWindow.ConnectedPoint != null) FatherWindow.ConnectedPoint.UpLoad();
        }
    }
    public void SpawnEvent(AnimatedFloat animatedFloat)
    {
        EventPoint eventPoint = Instantiate(this.eventPoint, Area);
        eventPoint.FatherTab = this;
        eventPoint.Initialize(animatedFloat);
        eventPoints.Insert(FindInsertIndex(eventPoint.animatedFloat.startTime), eventPoint);
        LinkNewEventPoint(eventPoint);
        eventPoint.ReDraw(scalevalue);
        connectFloat.Add(eventPoint.animatedFloat);
        connectFloat.Sort();
    }
    // 连接新事件点
    private void LinkNewEventPoint(EventPoint eventPoint)
    {
        int index = eventPoints.IndexOf(eventPoint);
        if (index - 1 >= 0)
        {
            eventPoint.LastEventPoint = eventPoints[index - 1];
            eventPoint.LastEventPoint.NextEventPoint = eventPoint;
            eventPoint.LastEventPoint.ReDraw(scalevalue);
        }
        if (index + 1 < eventPoints.Count)
        {
            eventPoint.NextEventPoint = eventPoints[index + 1];
            eventPoint.animatedFloat.endTime = eventPoint.NextEventPoint.animatedFloat.startTime;
            eventPoint.Initialize(eventPoint.animatedFloat);
            eventPoint.NextEventPoint.LastEventPoint = eventPoint;
        }
    }

    // 查找插入索引
    public int FindInsertIndex(float startTime)
    {
        int low = 0;
        int high = eventPoints.Count - 1;
        while (low <= high)
        {
            int mid = (low + high) / 2;
            if (eventPoints[mid].animatedFloat.startTime < startTime)
            {
                low = mid + 1;
            }
            else
            {
                high = mid - 1;
            }
        }
        return low;
    }

    // 获取节拍
    public float GetBeat()
    {
        float mouseInputX = Mouse.current.position.ReadValue().x;
        float far = BeatArea.transform.position.x;
        float Beat = 0;
        while (far < mouseInputX)
        {
            far += (FirstBeatLine.transform.position.x - BeatArea.transform.position.x) / BeatNextDeviver;
            Beat += 1f / BeatNextDeviver;
        }
        return FatherWindow.timePerBeat * (Beat - (1f / BeatNextDeviver));
    }

    public float scalevalue => FatherWindow.scalevalue;

    // 曲线缩放
    public void CurveScale(float value)
    {
        foreach (EventPoint i in eventPoints)
        {
            i.ReDraw(value);
        }
    }

    // 改变X轴节拍
    public void XbeatCnange(int num)
    {
        ClearChildren(XBeatArea);
        for (int i = 1; i < num; i++)
        {
            foreach (Transform child in BeatArea)
            {
                GameObject newChild = Instantiate(child.gameObject, XBeatArea);
                CanvasGroup canvasGroup = newChild.GetComponent<CanvasGroup>();
                newChild.transform.localPosition = new Vector3(child.localPosition.x + ((float)BeatDeviver) / num * i, child.localPosition.y, child.localPosition.z);
                if (canvasGroup == null)
                {
                    canvasGroup = newChild.AddComponent<CanvasGroup>();
                }
                canvasGroup.alpha = 0.1f;
            }
        }
    }

    // 移除动画
    public void remoceAnim(AnimatedFloat a)
    {
        if (connectFloat.animations.Contains(a))
        {
            connectFloat.animations.Remove(a);
        }
    }
}