using System;
using System.Collections;
using System.Collections.Generic;
using Unity.VisualScripting;
using UnityEngine;
using UnityEngine.SceneManagement;
using UnityEngine.UIElements;

/* 本代码用来在某些场景中动态切换选择的狗
 * 本代码挂载在 Dog Selector prefeb 下
 */

public class DogSelectorController : MonoBehaviour
{
    private List<Label> dogNames = new();
    private VisualElement dogIcon, dogList;
    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void OnEnable()
    {
        var root = GetComponent<UIDocument>().rootVisualElement;
        dogIcon = root.Q<VisualElement>("dogMenu").Q<VisualElement>("dogIcon");
        dogList = root.Q<VisualElement>("dogMenu").Q<VisualElement>("dogList");

        StartCoroutine(DogNameInit());      // 初始化狗的名字，这里当菜单重新激活后再次加载

        dogIcon.RegisterCallback<ClickEvent>(e => DogIconClick(e));

        // 如果用户拥有狗的数量=1，就不显示
        if (UserProperty.dogs.Count == 1)
        {
            dogIcon.visible = false;
        }

        // 如果是playground场景，调整狗的名字的位置
        if (SceneManager.GetActiveScene().name == "Playground")
        {
            var dogMenu = root.Q<VisualElement>("dogMenu");
            dogMenu.style.top = 256;
        }
    }

    // Update is called once per frame
    void Update()
    {
        DogNameDisplayEffect();     // 根据FocusDog调整显示效果
    }

    // 初始化狗的名字
    IEnumerator DogNameInit()
    {
        yield return null;
        dogNames.Clear();       // 清空Label列表
        foreach (Label child in dogList.Children())     // 寻找Label元素加入列表
        {
            dogNames.Add(child);
        }

        // 注入狗的名字，最多注入3只狗
        for (int i = 0; i < Math.Min(UserProperty.dogs.Count, 3); i++)
        {
            int index = i;
            dogNames[i].style.display = DisplayStyle.Flex;
            dogNames[i].text = UserProperty.dogs[i].dog_name;
            dogNames[i].RegisterCallback<ClickEvent>(e => DogNameClick(e, index));
        }
    }

    void DogIconClick(ClickEvent e)
    {
        Debug.Log("DogIconClick");
        if (dogList.visible == false)
        {
            dogList.visible = true;
        }
        else
        {
            dogList.visible = false;
        }

    }

    // 点击狗的名字时候处理，重新读取当前场景
    void DogNameClick(ClickEvent e, int index)
    {
        GameData.focusDog = index;
        if (dogList.visible == true) { dogList.visible = false; }
        // 获取当前场景的名称
        string currentSceneName = SceneManager.GetActiveScene().name;
        // 重新加载当前场景
        SceneManager.LoadScene(currentSceneName);
    }

    // 根据FocusDog调整显示效果
    void DogNameDisplayEffect()
    {
        for (int i = 0; i < UserProperty.dogs.Count; i++)
        {
            if (i == GameData.focusDog)
            {
                dogNames[i].style.backgroundColor = new Color(180, 250, 120, 180);
            }
            else
            {
                dogNames[i].style.backgroundColor = new Color(255, 255, 255, 0);
            }
        }
    }
}