using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;
using DG.Tweening;
using UnityEngine.UI;

public enum UI_TriggerItemType
{
    none,
    hand,
    gloves,
    handWithGloves,
    screwdriver,//螺丝刀
    chassisCover,//机箱盖
    chassisCoverLock,//机箱盖卡扣
    chassisCoverSetPos,//机箱盖位置
    fan,
    fanSetPos,//风扇安装位置
    power,
    AntiStaticBag,//防静电袋
    powerLock,//电源卡扣
    powerSetPos,//电源插槽
    netWorkCard,
    netWorkCardSetPos,
    lightModel,
    lightModelSetPos,
    opticalFiber,//光纤
    valve,//阀门
    coolCover,//制冷机盖子
    cleaningRod,//清洁棒
    refrigerant,//冷媒
    refrigerantPos,//冷媒添加口
    powerSwitch,//电闸
    fuse,//保险丝
    fusePos,
    battery,//电池
    batteryPos,
    ram,//内存条
    ramPos,
    hardDisk,
    hardDiskPos,
    screw,//螺丝
}


[RequireComponent(typeof(Rigidbody),typeof(BoxCollider))]
public class UI_ItemMoveTool : MonoBehaviour,IDragHandler,IEndDragHandler,IBeginDragHandler
{
    private float xOffset = 0;
    private float yOffset = 0;

    private Image img;

    private Transform moveContent;
    private Transform t_parent;

    private bool isDrag = false;

    public UI_TriggerItemType itemType;

    private UI_TriggerItemType lastTriggerType;

    public bool dragHandlerActive = true;
    
    private void Awake()
    {
        xOffset = Screen.width * 0.5f;
        yOffset = Screen.height * 0.5f;

        img = this.GetComponent<Image>();
        t_parent = this.transform.parent;
        moveContent = GameObject.FindWithTag("MoveItemContent").transform;
    }
    
    public void OnDrag(PointerEventData eventData)
    {
        if (!dragHandlerActive)
        {
            return;
        }
        float saclex = 1920.0f / Screen.width;
        float sacley = 1080.0f / Screen.height;
        Vector3 pos = eventData.position;
        pos.x -= xOffset;
        pos.y -= yOffset;
        pos.x *= saclex;
        pos.y *= sacley;
        this.transform.localPosition = pos;
    }

    public void OnEndDrag(PointerEventData eventData)
    {
        if (!dragHandlerActive)
        {
            return;
        }
        this.transform.SetParent(t_parent);
        this.transform.DOLocalMove(Vector3.zero, 0.2f);
        isDrag = false;
        if (lastTriggerType != UI_TriggerItemType.none)
        {
            GameMain.Event.Fire(this,UI_ItemMoveDoneEvent.Create(itemType,lastTriggerType));
        }
    }

    public void OnBeginDrag(PointerEventData eventData)
    {
        if (!dragHandlerActive)
        {
            return;
        }
        this.transform.SetParent(moveContent);
        lastTriggerType = UI_TriggerItemType.none;
        isDrag = true;
    }

    private void OnTriggerEnter(Collider other)
    {
        if (isDrag)
        {
            UI_ItemMoveTool targetItem;
            if (other.TryGetComponent<UI_ItemMoveTool>(out targetItem))
            {
                lastTriggerType = targetItem.itemType;
            }
        }
    }
    
    private void OnTriggerExit(Collider other)
    {
        if (isDrag)
        {
            UI_ItemMoveTool targetItem;
            if (other.TryGetComponent<UI_ItemMoveTool>(out targetItem))
            {
                lastTriggerType = UI_TriggerItemType.none;
            }
        }
    }
}