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

public class BuildRemains : MonoBehaviour, IPointerDownHandler
{
    private Vector3 offset;
    private float Zpos = -9f; // 控制物体的 z 轴位置
    private delegate void Style();
    private Style style;
    //public float rayDistance = 2f; // 射线的最大距离
    public Vector3 boxSize = new Vector3(1f, 1f, 1f); // 盒子的尺寸
    public float detectionDistance = 2f;              // 盒子检测的距离

    public List<float> distances;
    private int CurrentScreen;//当前所在场景index

    private float BuffValue;
    [Header("效果持续时间-1为永久")]
    public float UseTimes;

    private Action BuffOpen;
    private Action BuffClose;
    private bool BuffOk;//buff已经添加上了
    Buildings MyBuilds;
    private void OnEnable()
    {
        style = Move;

        if (SceneTransitionManager.Instance.CurrentTrackingPointIndex < 3)
        {
            Zpos = distances[SceneTransitionManager.Instance.CurrentTrackingPointIndex];
            CurrentScreen = SceneTransitionManager.Instance.CurrentTrackingPointIndex;
            SpriteRenderer spriteRenderer = GetComponent<SpriteRenderer>();
            switch (CurrentScreen)
            {
                case 0:
                    spriteRenderer.sortingLayerName = "Slime";
                    spriteRenderer.sortingOrder = 1200;
                    break;
                case 1:
                    spriteRenderer.sortingLayerName = "伐木场";
                    spriteRenderer.sortingOrder = 30;
                    break;
                case 2:
                    spriteRenderer.sortingLayerName = "日神";
                    spriteRenderer.sortingOrder = 5;
                    break;
                default:
                    break;
            }
        }

    }
    private void Update()
    {
        style?.Invoke();
    }
    /// <summary>
    /// 确定遗物类别
    /// </summary>
    public void ChangeRemainskind(string remiansname)
    {
        BuffOk = false;
        if (remiansname.StartsWith("天外乐章"))
        {
            // 判断是哪个版本
            if (remiansname == "天外乐章I")
            {
                BuffValue = 2;
                Debug.Log("这是 天外乐章I");
            }
            else if (remiansname == "天外乐章II")
            {
                BuffValue = 3;
                Debug.Log("这是 天外乐章II");
            }
            else if (remiansname == "天外乐章III")
            {
                BuffValue = 5;
                Debug.Log("这是 天外乐章III");
            }
            BuffOpen = () => { if (BuffOk) return; GlobalBuffSystem.Instance.GlobalMultiplier *= BuffValue; BuffOk = true; };
            BuffClose = () => { if (!BuffOk) return; GlobalBuffSystem.Instance.GlobalMultiplier /= BuffValue; BuffOk = false; };
            UseTimes = 10;
        }
        else if (remiansname.StartsWith("鼓舞铭文拓本"))
        {
            if (remiansname == "鼓舞铭文拓本I")
            {
                BuffValue = 3;
                Debug.Log("这是 鼓舞铭文拓本I");
            }
            else if (remiansname == "鼓舞铭文拓本II")
            {
                BuffValue = 5;
                Debug.Log("这是 鼓舞铭文拓本II");
            }
            else if (remiansname == "鼓舞铭文拓本III")
            {
                BuffValue = 10;
                Debug.Log("这是 鼓舞铭文拓本III");
            }
            BuffOpen = GuWuRemainsOpen;
            BuffClose = GuWuRemainsClose;
            UseTimes = -1;
        }
        else if (remiansname.StartsWith("信仰铭文"))
        {
            if (remiansname == "信仰铭文I")
            {
                BuffValue = 3;
                Debug.Log("这是 信仰铭文I");
            }
            else if (remiansname == "信仰铭文II")
            {
                BuffValue = 5;
                Debug.Log("这是 信仰铭文II");
            }
            else if (remiansname == "信仰铭文III")
            {
                BuffValue = 10;
                Debug.Log("这是 信仰铭文III");
            }
            BuffOpen = FaithRemainsOpen;
            BuffClose = FaithRewadsClose;
            UseTimes = -1;
        }
    }

    private void Move()
    {
        // 获取当前鼠标的位置并转换为世界坐标，保持物体的 Zpos
        Vector3 mousePosition = Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, Camera.main.WorldToScreenPoint(transform.position).z));
        // 更新物体位置为鼠标位置加上偏移量，确保 Z 轴不变
        transform.position = new Vector3(mousePosition.x + offset.x, mousePosition.y + offset.y, Zpos);
        if (Input.GetMouseButtonUp(0) || SceneTransitionManager.Instance.CurrentTrackingPointIndex != CurrentScreen)
        {
            style = null;
            OnclickEvent();
        }
    }
    private void OnclickEvent()
    {
        ClickEvent();
    }
    private void ClickEvent()
    {
        // 盒子的中心点位于物体自身的位置，并在物体的前方一定距离处
        Vector3 boxCenter = transform.position + transform.forward * detectionDistance;

        // 绘制可视化线条用于调试（代替 Gizmos 绘制）
        Debug.DrawLine(transform.position, boxCenter, Color.green, 2.0f); // 画一条线指向检测位置

        // 获取在盒子范围内的所有碰撞体
        Collider[] hitColliders = Physics.OverlapBox(boxCenter, boxSize / 2, transform.rotation);

        // 遍历所有碰撞体
        foreach (Collider hitCollider in hitColliders)
        {
            Debug.Log("Hit object: " + hitCollider.gameObject.name);
            GameObject obj = hitCollider.gameObject;

            // 检查物体是否实现了 IPointerDownHandler 接口
            if (obj.transform.parent.TryGetComponent(out ContactArea contactArea))
            {
                Debug.Log("检测到建筑类");
                if (UseTimes != -1) style = CutTimes;
                MyBuilds = contactArea.buildings;
                UsingRemains();
                break;
            }
        }
    }
    private void CutTimes()
    {
        UseTimes -= Time.deltaTime;
        if (UseTimes < 0 && UseTimes != -1)
        {
            DisUsingRemains();
            Destroy(gameObject);
        }
    }

    public void UsingRemains() //使用遗物效果
    {
        BuffOpen?.Invoke();
    }

    public void DisUsingRemains() //取消使用遗物效果
    {
        BuffClose?.Invoke();
    }
    private void GuWuRemainsOpen()
    {
        if (BuffOk) return;
        MyBuilds.LocalBuff_Auto += BuffValue;
        Debug.LogWarning("鼓舞" + BuffValue + "---" + MyBuilds.LocalBuff_Auto);
        BuffOk = true;
    }
    private void GuWuRemainsClose()
    {
        if (!BuffOk) return;
        MyBuilds.LocalBuff_Auto -= BuffValue;
        BuffOk = false;
    }

    private void FaithRemainsOpen()
    {
        if (BuffOk) return;
        MyBuilds.SpecalBuffAdd_efficiency_Auto += BuffValue;
        BuffOk = true;
    }
    private void FaithRewadsClose()
    {
        if (!BuffOk) return;
        MyBuilds.SpecalBuffAdd_efficiency_Auto -= BuffValue;
        BuffOk = false;
    }

    // 绘制盒子用于调试
    private void OnDrawGizmos()
    {
        // 在编辑器中显示盒子的检测区域
        Vector3 boxCenter = transform.position + transform.forward * detectionDistance;
        Gizmos.color = Color.red;
        Gizmos.DrawWireCube(boxCenter, boxSize);
    }

    public void OnPointerDown(PointerEventData eventData)
    {
        DisUsingRemains();
        style = Move;
        // 获取鼠标点击位置并将其转换为世界坐标，保持物体的 Zpos
        Vector3 mousePosition = Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, Camera.main.WorldToScreenPoint(transform.position).z));

        // 计算物体位置与鼠标位置的偏移量
        offset = transform.position - mousePosition;
    }
}