using UnityEngine;
using Yarn.Unity;
using System;
using System.Collections.Generic;
using System.Collections;
using AibisDream;
using System.Linq;

public class LineManager : MonoBehaviour
{
    //public GameObject interactiveLineSegmentPrefab;
    public GameObject visualLineSegmentPrefab;

    public CustomCursor customCursor;  // 自定义光标，你可以在 Inspector 中设置

    private bool isScissorsMode;

    public bool IsScissorsMode
    {
        get
        {
            return isScissorsMode;
        }
        set
        {
            isScissorsMode = value;

            if (isScissorsMode)
            {
                SetScissorsCursor();
            }
            else
            {
                ResetCursor();
            }
        }
    }
    private Dictionary<string, InteractiveLineSegment> lineSegmentDictionary = new Dictionary<string, InteractiveLineSegment>();

    public IEnumerable<string> GetLineSegmentNames()
{
    return lineSegmentDictionary.Keys;
}

  private void SetScissorsCursor()
    {
        // 启用自定义光标
        customCursor.gameObject.SetActive(true);
    }

    private void ResetCursor()
    {
        // 禁用自定义光标
        customCursor.gameObject.SetActive(false);
    }




    private void Start()
    {
        // 查找场景中的所有 InteractiveLineSegment 并添加到字典中
        InteractiveLineSegment[] lineSegments = FindObjectsOfType<InteractiveLineSegment>();
        foreach (InteractiveLineSegment lineSegment in lineSegments)
        {
            lineSegmentDictionary.Add(lineSegment.name, lineSegment);
        }
    }
    public InteractiveLineSegment GetLineSegmentByName(string lineSegmentName)
    {
        if (lineSegmentDictionary.TryGetValue(lineSegmentName, out InteractiveLineSegment lineSegment))
        {
            return lineSegment;
        }
        else
        {
            Debug.LogError("Invalid line segment name: " + lineSegmentName);
            return null;
        }
    }
    public string GetLineSegmentName(string input)
    {
        // 转换为小写并移除所有的下划线
        string[] inputWords = input.ToLower().Split('_');

        foreach (var lineSegmentName in lineSegmentDictionary.Keys)
        {
            // 转换为小写并移除所有的下划线
            string[] lineSegmentWords = lineSegmentName.ToLower().Split('_');

            // 检查是否包含相同的单词
            if (inputWords.All(word => lineSegmentWords.Contains(word)) && lineSegmentWords.All(word => inputWords.Contains(word)))
            {
                return lineSegmentName;
            }
        }

        return null;
    }


    // Yarn 命令，设置线段的可剪断性
    [YarnCommand("set_line_cuttable")]
    public void SetLineCuttable(string lineSegmentName, bool isCuttable)
    {
        string recognizedName = GetLineSegmentName(lineSegmentName);
        if (recognizedName != null)
        {
            InteractiveLineSegment lineSegment = GetLineSegmentByName(recognizedName);
            if (lineSegment != null)
            {
                lineSegment.IsCuttable = isCuttable;
            }
        }
        else
        {
            Debug.LogError("Invalid line segment name: " + lineSegmentName);
        }
    }


     // Yarn 命令，设置剪刀模式
    [YarnCommand("set_scissors_mode")]
    public void SetScissorsMode(bool isEnabled)
    {
        IsScissorsMode = isEnabled;
    }

    public void CutLine(InteractiveLineSegment originalLineSegment, Vector3 splitPoint)
    {
        // 如果线段不可剪断，就直接返回，不进行剪断操作
        if (!originalLineSegment.IsCuttable)
        {
            return;
        }

          // Create the first new line segment
        GameObject firstLineSegmentObject = Instantiate(visualLineSegmentPrefab, transform);
        VisualLineSegment firstLineSegment = firstLineSegmentObject.GetComponent<VisualLineSegment>();
        firstLineSegment.Initialize(originalLineSegment.StartPoint, splitPoint);

        // Create the second new line segment
        GameObject secondLineSegmentObject = Instantiate(visualLineSegmentPrefab, transform);
        VisualLineSegment secondLineSegment = secondLineSegmentObject.GetComponent<VisualLineSegment>();
        secondLineSegment.Initialize(originalLineSegment.EndPoint, splitPoint);

        // Immediately destroy the original line segment
        Destroy(originalLineSegment.gameObject);

        // Shrink and disappear the new line segments
        firstLineSegment.ShrinkAndDisappear();
        secondLineSegment.ShrinkAndDisappear();
    }

    public void BindOptionToLineSegment(string lineSegmentName, YarnOption option)
{
    InteractiveLineSegment lineSegment = GetLineSegmentByName(lineSegmentName);
    if (lineSegment != null)
    {
        lineSegment.Option = option;
    }
}

    private void Update()
    {
        if (Input.GetMouseButtonDown(0) && isScissorsMode)
        {
            // Convert the mouse position to a 2D ray
            Vector2 ray = Camera.main.ScreenToWorldPoint(Input.mousePosition);

            // Check if the ray hits a line segment
            RaycastHit2D hit = Physics2D.Raycast(ray, Vector2.zero);
            if (hit.collider != null)
            {
                Debug.Log("Raycast hit: " + hit.transform.name);

                InteractiveLineSegment originalLineSegment = hit.transform.GetComponent<InteractiveLineSegment>();
                if (originalLineSegment != null)
                {
                    Debug.Log("Line segment hit: " + originalLineSegment.name);

                    CutLine(originalLineSegment,hit.point);
                    
                    // Check if Option is not null before selecting it
                    if (originalLineSegment.Option != null)
                    {
                        originalLineSegment.Option.SelectOption();
                    }
                }
                else
                {
                    //Debug.Log("Hit object is not a line segment");
                }
            }
        }
    }


    
    
}