using System;
using System.IO;
using UnityEngine;

namespace GameFramework
{
    /// <summary>
    /// 静态 JSON 存档系统。读写 Application.persistentDataPath 下的文件。
    /// 排行榜等数据通过它持久化。
    /// </summary>
    public static class SaveSystem
    {
        public static void Save(string saveFileName, object data)
        {
            var json = JsonUtility.ToJson(data);
            var path = Path.Combine(Application.persistentDataPath, saveFileName);

            try
            {
                File.WriteAllText(path, json);
#if UNITY_EDITOR
                Debug.Log($"[SaveSystem] 已保存到 {path}");
#endif
            }
            catch (Exception exception)
            {
                Debug.LogError($"[SaveSystem] 保存失败 {path}\n{exception}");
            }
        }

        public static T Load<T>(string saveFileName)
        {
            var path = Path.Combine(Application.persistentDataPath, saveFileName);
            try
            {
                var json = File.ReadAllText(path);
                return JsonUtility.FromJson<T>(json);
            }
            catch (Exception exception)
            {
                Debug.LogError($"[SaveSystem] 读取失败 {path}\n{exception}");
                return default;
            }
        }

        public static void DeleteSaveFile(string saveFileName)
        {
            var path = Path.Combine(Application.persistentDataPath, saveFileName);
            try { File.Delete(path); }
            catch (Exception exception) { Debug.LogError($"[SaveSystem] 删除失败 {path}\n{exception}"); }
        }

        public static bool SaveFileExists(string saveFileName)
        {
            return File.Exists(Path.Combine(Application.persistentDataPath, saveFileName));
        }
    }
}