using System;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
/* 根据语言自动切换图片的自定义组件 */
public class ImageAutoLanguage : MonoBehaviour
{
    static LanguageEnum currentLanguageEnum = LanguageEnum.Chinese;
    static HashSet<ImageAutoLanguage> imageAutoLanguages = new HashSet<ImageAutoLanguage>();
    [SerializeField] LanguageImage[] languageImages = {};
    [SerializeField] bool resetSize;

    private static bool inited = false;
    public static void Init()
    {
        if (inited) return;
        inited = true;
        int id = PlayerPrefs.GetInt("Language", 0);
        ChangeLanguage((LanguageEnum) id);
    }

    public static void ChangeLanguage(LanguageEnum languageEnum) 
    {
        currentLanguageEnum = languageEnum;
        PlayerPrefs.SetInt("Language", ((int)languageEnum));
        foreach (var imageAutoLanguage in imageAutoLanguages)
        {
            try {
                imageAutoLanguage.ApplyToImage();    
            } catch (Exception e) { Debug.LogError(e.Message); }
        }
    }

    public static LanguageEnum GetLanguage()
    {
        Init();
        return currentLanguageEnum;
    }

    void Awake()
    {
        Init();
    }

    void Start()
    {
        imageAutoLanguages.Add(this);
        ApplyToImage();   
    }

    void OnDestroy()
    {
        imageAutoLanguages.Remove(this);
    }

    public void ApplyToImage()
    {
        Image imageComp = GetComponent<Image>();
        LanguageImage matchRes = null;
        foreach (var languageImage in languageImages)
        {
            if (languageImage.language == currentLanguageEnum) 
            {
                matchRes = languageImage;
                break;
            }
        }
        if (matchRes == null && languageImages.Length > 0) {
            matchRes = languageImages[0];
        }
        if (matchRes != null) {
            imageComp.sprite = matchRes.sprite;
            if (resetSize) {
                JCUnityLib.RectTransformUtils.SetRectTransformSize(
                    imageComp.transform as RectTransform, matchRes.size
                );
            }
        }
    }
}
[Serializable]
public class LanguageImage {
    public LanguageEnum language;
    public Sprite sprite;
    public Vector2 size;
}