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

public class TrainingDeviceItem : MonoBehaviour, IPointerEnterHandler, IPointerExitHandler, IPointerClickHandler
{
    /// <summary>
    /// 当前选中的设备选项
    /// </summary>
    public static TrainingDeviceItem SelectedItem;
    /// <summary>
    /// 所有的设备选项
    /// </summary>
    public static List<TrainingDeviceItem> TrainingDeviceItemList = new List<TrainingDeviceItem>();
    /// <summary>
    /// 鼠标悬浮状态背景
    /// </summary>
    public Image SelectedBackground;
    /// <summary>
    /// 选中状态
    /// </summary>
    public Image SelectedStatus;
    /// <summary>
    /// 设备图片
    /// </summary>
    public Image DeviceIcon;

    /// <summary>
    /// 训练数据
    /// </summary>
    public TrainingDeviceData TrainingDeviceData;

    public void Init(TrainingDeviceData data, Sprite _sprite)
    {
        TrainingDeviceData = data;
        if (!TrainingDeviceItemList.Contains(this))
            TrainingDeviceItemList.Add(this);
        if (_sprite != null)
        {
            DeviceIcon.sprite = _sprite;
        }
    }

    public void OnPointerClick(PointerEventData eventData)
    {
        //未选设备时禁止选择选项
        if (DeviceItem.SelectedItem == null)
            return;

        if (SelectedItem != null)
        {
            //已选中再次点击取消选中
            if (SelectedItem == this)
            {
                SelectedItem.SetSelectStatus(false);
                SelectedItem = null;
            }
            else
            {
                SelectedItem.SetSelectStatus(false);
                if (SelectedItem != this)
                    SelectedItem.SelectedBackground.gameObject.SetActive(false);
                SelectedItem = this;
                SetSelectStatus(true);
            }
        }
        else
        {
            SelectedItem = this;
            SetSelectStatus(true);
        }
    }

    public void OnPointerEnter(PointerEventData eventData)
    {
        if (SelectedItem != this)
            SelectedBackground.gameObject.SetActive(true);
    }

    public void OnPointerExit(PointerEventData eventData)
    {
        if (SelectedItem != this)
            SelectedBackground.gameObject.SetActive(false);
    }

    /// <summary>
    /// 改变选中状态
    /// </summary>
    /// <param name="selected">是否选中</param>
    /// <param name="force">是否强制执行</param>
    public void SetSelectStatus(bool selected, bool force = false)
    {
        SelectedStatus.gameObject.SetActive(selected);
        if (force)
        {
            SelectedBackground.gameObject.SetActive(selected);
            SelectedItem = selected ? this : null;
        }
        else
        {
            DeviceItem.SelectedItem.DevicesItemData._select_sprite = DeviceIcon.sprite;
            TrainingManager.Instance.UpdateSelectItem(selected ? TrainingDeviceData.id : "");
        }
    }
}