using UnityEngine;
using System.Collections.Generic;

public class SongDataLibrary : MonoBehaviour
{
    public static SongDataLibrary Instance;
    private Dictionary<int, SongData> songDataDictionary = new Dictionary<int, SongData>();

    // 指定存放在 "song_songIndex" 目录下的各个子文件夹名称
    // 例如：如果你有 Assets/Resources/song_songIndex/FolderA 和 FolderB，则在 Inspector 中填写 { "FolderA", "FolderB" }
    public string[] subfolderNames;

    private void Awake()
    {
        if (Instance == null)
        {
            Instance = this;
            DontDestroyOnLoad(gameObject);
            LoadSongData();
        }
        else
        {
            Destroy(gameObject);
        }
    }

    private void LoadSongData()
    {
        // 先加载直接放在 "song_songIndex" 目录下的 SongData
        SongData[] assets = Resources.LoadAll<SongData>("song_songIndex");
        foreach (SongData data in assets)
        {
            if (!songDataDictionary.ContainsKey(data.songID))
            {
                songDataDictionary.Add(data.songID, data);
                Debug.Log("加载到 SongData, songID: " + data.songID + ", 名称: " + data.songName);
            }
            else
            {
                Debug.LogWarning("重复的 songID: " + data.songID);
            }
        }

        // 再遍历每个子文件夹，加载其中的 SongData
        foreach (string subfolder in subfolderNames)
        {
            SongData[] subAssets = Resources.LoadAll<SongData>("song_songIndex/" + subfolder);
            foreach (SongData data in subAssets)
            {
                if (!songDataDictionary.ContainsKey(data.songID))
                {
                    songDataDictionary.Add(data.songID, data);
                    Debug.Log("从 " + subfolder + " 加载到 SongData, songID: " + data.songID + ", 名称: " + data.songName);
                }
                else
                {
                    Debug.LogWarning("重复的 songID: " + data.songID);
                }
            }
        }
    }

    public SongData GetSongDataByID(int songID)
    {
        if (songDataDictionary.ContainsKey(songID))
        {
            return songDataDictionary[songID];
        }
        Debug.LogError("未找到 songID: " + songID);
        return null;
    }
}